{"id":1915,"date":"2025-08-25T02:14:28","date_gmt":"2025-08-25T02:14:28","guid":{"rendered":"https:\/\/flj-pcb.com\/?page_id=1915"},"modified":"2025-09-25T07:23:07","modified_gmt":"2025-09-25T07:23:07","slug":"hdi-pcb","status":"publish","type":"page","link":"https:\/\/flj-pcb.com\/vi\/pcb-manufacturer\/hdi-pcb\/","title":{"rendered":"D\u1ecbch v\u1ee5 thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t PCB HDI \u0111\u00e1ng tin c\u1eady"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"1915\" class=\"elementor elementor-1915\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c325e24 e-flex e-con-boxed e-con e-parent\" data-id=\"c325e24\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ce50fb elementor-widget elementor-widget-text-editor\" data-id=\"2ce50fb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2 data-start=\"78\" data-end=\"101\">B\u1ea3ng m\u1ea1ch in HDI l\u00e0 g\u00ec?<\/h2>\n<p data-start=\"102\" data-end=\"607\">B\u1ea3ng m\u1ea1ch HDI l\u00e0 b\u1ea3ng m\u1ea1ch in c\u00f3 m\u1eadt \u0111\u1ed9 k\u1ebft n\u1ed1i cao. Lo\u1ea1i b\u1ea3ng m\u1ea1ch n\u00e0y s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 vias m\u00f9 v\u00e0 l\u1ed7 vias ch\u00f4n ng\u1ea7m. C\u00e1c b\u1ea3ng m\u1ea1ch n\u00e0y c\u00f3 m\u1eadt \u0111\u1ed9 \u0111\u01b0\u1eddng d\u1eabn cao. Ch\u00fang bao g\u1ed3m c\u00e1c \u0111\u01b0\u1eddng d\u1eabn tr\u00ean l\u1edbp trong v\u00e0 l\u1edbp ngo\u00e0i. Ngo\u00e0i ra, ch\u00fang c\u00f2n s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 khoan v\u00e0 l\u1ed7 m\u1ea1 \u0111\u1ec3 k\u1ebft n\u1ed1i c\u00e1c \u0111\u01b0\u1eddng d\u1eabn gi\u1eefa c\u00e1c l\u1edbp. Khi c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n t\u1eed ng\u00e0y c\u00e0ng nh\u1ecf g\u1ecdn v\u00e0 ch\u00ednh x\u00e1c h\u01a1n, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t y\u00eau c\u1ea7u c\u00e1c b\u1ea3ng m\u1ea1ch in (PCB) c\u00f3 m\u1eadt \u0111\u1ed9 cao h\u01a1n. C\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 t\u0103ng m\u1eadt \u0111\u1ed9 PCB l\u00e0 gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng l\u1ed7 xuy\u00ean qua v\u00e0 th\u00eam c\u00e1c l\u1ed7 vias m\u00f9 v\u00e0 l\u1ed7 vias ch\u00f4n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed h\u1ee3p l\u00fd. Nhu c\u1ea7u n\u00e0y \u0111\u00e3 d\u1eabn \u0111\u1ebfn s\u1ef1 ra \u0111\u1eddi c\u1ee7a b\u1ea3ng m\u1ea1ch HDI.<\/p>\n<p data-start=\"102\" data-end=\"607\">\u00a0<\/p>\n<p data-start=\"102\" data-end=\"607\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-2703 aligncenter\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb.webp\" alt=\"hdi pcb\" width=\"600\" height=\"450\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb-300x225.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p data-start=\"102\" data-end=\"607\">\u00a0<\/p>\n<h2 data-start=\"609\" data-end=\"626\">\u0110\u1ecbnh ngh\u0129a IPC<\/h2>\n<p data-start=\"627\" data-end=\"681\"><a href=\"https:\/\/www.electronics.org\/TOC\/IPC-2226A.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\">IPC-2226<\/a> \u0111\u01b0a ra m\u1ed9t quy t\u1eafc r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi c\u00e1c l\u1ed7 vias b\u1ecb che khu\u1ea5t v\u00e0 ch\u00f4n ng\u1ea7m:<\/p>\n<ul data-start=\"682\" data-end=\"1035\">\n<li data-start=\"682\" data-end=\"734\">\n<p data-start=\"684\" data-end=\"734\">\u0110\u01b0\u1eddng k\u00ednh c\u1ee7a l\u1ed7 d\u1eabn ho\u1eb7c l\u1ed7 d\u1eabn ch\u00f4n ng\u1ea7m \u2264 0,15 mm (0,00591 inch).<\/p>\n<\/li>\n<li data-start=\"735\" data-end=\"781\">\n<p data-start=\"737\" data-end=\"781\">\u0110\u01b0\u1eddng k\u00ednh v\u00f2ng tr\u00f2n \u2264 0,35 mm (0,0138 inch).<\/p>\n<\/li>\n<li data-start=\"782\" data-end=\"1035\">\n<p data-start=\"784\" data-end=\"1035\">C\u00e1c l\u1ed7 vias n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch khoan laser ho\u1eb7c khoan c\u01a1 h\u1ecdc, ho\u1eb7c b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0103n m\u00f2n kh\u00f4\/\u01b0\u1edbt, ho\u1eb7c b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n m\u1eabu. Sau \u0111\u00f3, m\u1ed9t l\u1edbp m\u1ea1 d\u1eabn \u0111i\u1ec7n s\u1ebd ph\u1ee7 l\u00ean l\u1ed7.<br \/>L\u01b0u \u00fd: N\u1ebfu \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 l\u1edbn h\u01a1n 0,15 mm (0,00591 inch), h\u00e3y coi \u0111\u00f3 l\u00e0 l\u1ed7 xuy\u00ean theo ti\u00eau chu\u1ea9n t\u01b0\u01a1ng t\u1ef1.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"1037\" data-end=\"1069\">C\u00e1c k\u00edch th\u01b0\u1edbc l\u1ed7 khoan th\u00f4ng d\u1ee5ng cho HDI<\/h2>\n<p data-start=\"1070\" data-end=\"1183\">C\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u01b0\u1eddng d\u1eabn ph\u1ed5 bi\u1ebfn cho HDI l\u00e0 3\u20135 mil. C\u00e1c nh\u00e0 thi\u1ebft k\u1ebf th\u01b0\u1eddng s\u1eed d\u1ee5ng 4 mil l\u00e0m gi\u00e1 tr\u1ecb trung b\u00ecnh cho qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<h2 data-start=\"1185\" data-end=\"1221\">C\u00e1c ti\u00eau chu\u1ea9n IPC ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho HDI<\/h2>\n<p data-start=\"1222\" data-end=\"1265\">C\u00e1c ti\u00eau chu\u1ea9n IPC ti\u00eau bi\u1ec3u cho c\u00f4ng vi\u1ec7c HDI bao g\u1ed3m:<\/p>\n<ol data-start=\"1266\" data-end=\"1627\">\n<li data-start=\"1266\" data-end=\"1351\">\n<p data-start=\"1269\" data-end=\"1351\">IPC\/JPCA-2315 \u2014 H\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac k\u1ebft n\u1ed1i m\u1eadt \u0111\u1ed9 cao v\u00e0 l\u1ed7 vi m\u1ea1ch.<\/p>\n<\/li>\n<li data-start=\"1352\" data-end=\"1441\">\n<p data-start=\"1355\" data-end=\"1441\">IPC-2226 \u2014 Ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf cho b\u1ea3ng m\u1ea1ch in k\u1ebft n\u1ed1i m\u1eadt \u0111\u1ed9 cao (HDI).<\/p>\n<\/li>\n<li data-start=\"1442\" data-end=\"1545\">\n<p data-start=\"1445\" data-end=\"1545\">IPC\/JPCA-4104 \u2014 Ti\u00eau chu\u1ea9n v\u1ec1 vi\u1ec7c x\u00e1c nh\u1eadn v\u00e0 \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i cho c\u00e1c c\u1ea5u tr\u00fac HDI.<\/p>\n<\/li>\n<li data-start=\"1546\" data-end=\"1627\">\n<p data-start=\"1549\" data-end=\"1627\">IPC-6016 \u2014 Ti\u00eau chu\u1ea9n v\u1ec1 ch\u1ee9ng nh\u1eadn v\u00e0 hi\u1ec7u su\u1ea5t cho c\u00e1c c\u1ea5u tr\u00fac HDI.<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"1629\" data-end=\"1632\" \/>\n<h1 data-start=\"1634\" data-end=\"1668\">\u0110\u1ecbnh tuy\u1ebfn HDI: nh\u1eefng th\u00e1ch th\u1ee9c v\u00e0 l\u1eddi khuy\u00ean<\/h1>\n<h2 data-start=\"1670\" data-end=\"1695\">\u0110\u1ecbnh tuy\u1ebfn HDI l\u00e0 g\u00ec<\/h2>\n<p data-start=\"1696\" data-end=\"2034\">\u0110\u1ecbnh tuy\u1ebfn HDI l\u00e0 vi\u1ec7c \u00e1p d\u1ee5ng c\u00e1c \u00fd t\u01b0\u1edfng thi\u1ebft k\u1ebf v\u00e0 ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t ti\u00ean ti\u1ebfn nh\u1ea5t \u0111\u1ec3 t\u1ea1o ra b\u1ed1 c\u1ee5c m\u1ea1ch d\u00e0y \u0111\u1eb7c h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i ch\u1ee9c n\u0103ng c\u1ee7a m\u1ea1ch. N\u00f3i t\u00f3m l\u1ea1i, HDI s\u1eed d\u1ee5ng nhi\u1ec1u l\u1edbp \u0111\u1ecbnh tuy\u1ebfn h\u01a1n, \u0111\u01b0\u1eddng d\u1eabn nh\u1ecf h\u01a1n, l\u1ed7 vias nh\u1ecf h\u01a1n, \u0111i\u1ec3m ti\u1ebfp x\u00fac nh\u1ecf h\u01a1n v\u00e0 l\u00f5i m\u1ecfng h\u01a1n. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p t\u00edch h\u1ee3p c\u00e1c m\u1ea1ch ph\u1ee9c t\u1ea1p v\u00e0 th\u01b0\u1eddng l\u00e0 m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao v\u00e0o nh\u1eefng kh\u00f4ng gian m\u00e0 tr\u01b0\u1edbc \u0111\u00e2y kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c.<\/p>\n<p data-start=\"2036\" data-end=\"2381\">Khi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn, vi\u1ec7c b\u1ed1 tr\u00ed m\u1ea1ch HDI \u0111\u00e3 xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u thi\u1ebft k\u1ebf. B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y HDI trong bo m\u1ea1ch ch\u1ee7, card \u0111\u1ed3 h\u1ecda, \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c c\u00f3 kh\u00f4ng gian h\u1ea1n ch\u1ebf. N\u1ebfu th\u1ef1c hi\u1ec7n b\u1ed1 tr\u00ed m\u1ea1ch HDI \u0111\u00fang c\u00e1ch, b\u1ea1n c\u00f3 th\u1ec3 thu nh\u1ecf k\u00edch th\u01b0\u1edbc bo m\u1ea1ch v\u00e0 \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u c\u00e1c v\u1ea5n \u0111\u1ec1 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) tr\u00ean PCB. Gi\u1ea3m chi ph\u00ed l\u00e0 m\u1ee5c ti\u00eau quan tr\u1ecdng c\u1ee7a nhi\u1ec1u doanh nghi\u1ec7p. Vi\u1ec7c b\u1ed1 tr\u00ed m\u1ea1ch HDI gi\u00fap \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau \u0111\u00f3.<\/p>\n<h2 data-start=\"2383\" data-end=\"2411\">\u0110\u1ecbnh tuy\u1ebfn HDI v\u00e0 l\u1ed7 vi m\u1ea1ch<\/h2>\n<p data-start=\"2412\" data-end=\"2575\">Qu\u00e1 tr\u00ecnh b\u1ed1 tr\u00ed m\u1ea1ch HDI ph\u1ee9c t\u1ea1p h\u01a1n so v\u1edbi b\u1ed1 tr\u00ed m\u1ea1ch \u0111a l\u1edbp th\u00f4ng th\u01b0\u1eddng. C\u00f3 th\u1ec3 b\u1ea1n \u0111\u00e3 bi\u1ebft c\u00e1ch thi\u1ebft k\u1ebf c\u00e1c b\u1ea3ng m\u1ea1ch in (PCB) 8 l\u1edbp ho\u1eb7c 16 l\u1edbp. Tuy nhi\u00ean, c\u00f4ng ngh\u1ec7 HDI mang \u0111\u1ebfn nh\u1eefng kh\u00e1i ni\u1ec7m m\u1edbi m\u00e0 b\u1ea1n c\u1ea7n ph\u1ea3i n\u1eafm v\u1eefng.<\/p>\n<p data-start=\"2577\" data-end=\"2941\">Trong m\u1ed9t b\u1ea3ng m\u1ea1ch in (PCB) th\u00f4ng th\u01b0\u1eddng, ch\u00fang ta xem to\u00e0n b\u1ed9 b\u1ea3ng m\u1ea1ch nh\u01b0 m\u1ed9t \u0111\u01a1n v\u1ecb duy nh\u1ea5t g\u1ed3m nhi\u1ec1u l\u1edbp. Trong c\u00f4ng ngh\u1ec7 HDI, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea3i xem x\u00e9t nhi\u1ec1u l\u1edbp si\u00eau m\u1ecfng \u0111\u01b0\u1ee3c x\u1ebfp ch\u1ed3ng l\u00ean nhau \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t b\u1ea3ng m\u1ea1ch. Y\u1ebfu t\u1ed1 ch\u00ednh quy\u1ebft \u0111\u1ecbnh vi\u1ec7c b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn trong HDI ch\u00ednh l\u00e0 c\u00f4ng ngh\u1ec7 l\u1ed7 th\u00f4ng (via). C\u00e1c l\u1ed7 th\u00f4ng kh\u00f4ng c\u00f2n ch\u1ec9 l\u00e0 nh\u1eefng l\u1ed7 \u0111\u01b0\u1ee3c m\u1ea1 kim lo\u1ea1i v\u00e0 khoan xuy\u00ean qua c\u1ea5u tr\u00fac x\u1ebfp ch\u1ed3ng \u0111\u00e3 ho\u00e0n thi\u1ec7n. C\u00e1c l\u1ed7 xuy\u00ean truy\u1ec1n th\u1ed1ng l\u00e0m gi\u1ea3m di\u1ec7n t\u00edch c\u00f3 s\u1eb5n cho vi\u1ec7c b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn tr\u00ean m\u1ed7i l\u1edbp.<\/p>\n<p data-start=\"2577\" data-end=\"2941\">\u00a0<\/p>\n<p data-start=\"2577\" data-end=\"2941\"><img decoding=\"async\" class=\"size-full wp-image-2702 aligncenter\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/HDI-microvias.webp\" alt=\"\" width=\"600\" height=\"414\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/HDI-microvias.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/HDI-microvias-300x207.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p data-start=\"2577\" data-end=\"2941\">\u00a0<\/p>\n<h2 data-start=\"2943\" data-end=\"2982\">C\u00e1c l\u1ed7 d\u1eabn truy\u1ec1n truy\u1ec1n th\u1ed1ng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi HDI<\/h2>\n<p data-start=\"2983\" data-end=\"3410\">Trong quy tr\u00ecnh \u0111\u1ecbnh tuy\u1ebfn HDI, c\u00e1c l\u1ed7 vias si\u00eau nh\u1ecf \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t. Ch\u00fang cho ph\u00e9p nhi\u1ec1u l\u1edbp d\u00e0y \u0111\u1eb7c k\u1ebft n\u1ed1i v\u1edbi nhau. C\u1ee5 th\u1ec3, c\u00e1c l\u1ed7 vias si\u00eau nh\u1ecf tr\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c l\u1ed7 vias m\u00f9 ho\u1eb7c ch\u00f4n ng\u1ea7m nh\u01b0ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c. C\u00e1c l\u1ed7 vias truy\u1ec1n th\u1ed1ng \u0111\u01b0\u1ee3c khoan sau khi c\u00e1c l\u1edbp \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1ebfp ch\u1ed3ng l\u00ean nhau. Trong khi \u0111\u00f3, c\u00e1c l\u1ed7 vias si\u00eau nh\u1ecf \u0111\u01b0\u1ee3c khoan b\u1eb1ng laser tr\u1ef1c ti\u1ebfp tr\u00ean c\u00e1c l\u1edbp tr\u01b0\u1edbc khi x\u1ebfp ch\u1ed3ng. C\u00e1c l\u1ed7 vias si\u00eau nh\u1ecf \u0111\u01b0\u1ee3c khoan b\u1eb1ng laser cho ph\u00e9p k\u00edch th\u01b0\u1edbc l\u1ed7 v\u00e0 k\u00edch th\u01b0\u1edbc \u0111i\u1ec3m ti\u1ebfp x\u00fac nh\u1ecf nh\u1ea5t gi\u1eefa c\u00e1c l\u1edbp. \u0110i\u1ec1u n\u00e0y gi\u00fap <a href=\"https:\/\/flj-pcb.com\/vi\/pcb-assembly\/bga-assmebly\/\">BGA<\/a> c\u00e1c b\u1ed1 c\u1ee5c ph\u00e2n nh\u00e1nh trong \u0111\u00f3 c\u00e1c ch\u00e2n c\u1eafm \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo d\u1ea1ng l\u01b0\u1edbi.<\/p>\n<h2 data-start=\"3412\" data-end=\"3437\">C\u00e1c chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn HDI<\/h2>\n<p data-start=\"3438\" data-end=\"3697\">V\u1edbi c\u00f4ng ngh\u1ec7 microvia, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf PCB c\u00f3 th\u1ec3 b\u1ed1 tr\u00ed m\u1ea1ng m\u1ea1ch ph\u1ee9c t\u1ea1p tr\u00ean nhi\u1ec1u l\u1edbp. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u00f4i khi \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cHDI \u0111a l\u1edbp\u201d ho\u1eb7c \u201ck\u1ebft n\u1ed1i t\u1eebng l\u1edbp\u201d. Do microvia gi\u00fap ti\u1ebft ki\u1ec7m kh\u00f4ng gian, c\u1ea3 hai l\u1edbp ngo\u00e0i \u0111\u1ec1u c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c linh ki\u1ec7n d\u00e0y \u0111\u1eb7c trong khi ph\u1ea7n l\u1edbn m\u1ea1ng m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean c\u00e1c l\u1edbp b\u00ean trong.<\/p>\n<h2 data-start=\"3699\" data-end=\"3739\">C\u00e1c m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t c\u00f3 tr\u1edf kh\u00e1ng th\u1ea5p l\u00e0 r\u1ea5t quan tr\u1ecdng<\/h2>\n<p data-start=\"3740\" data-end=\"3971\">Khi m\u1eadt \u0111\u1ed9 linh ki\u1ec7n v\u00e0 \u0111\u01b0\u1eddng m\u1ea1ch tr\u00ean b\u1ea3ng m\u1ea1ch nhi\u1ec1u l\u1edbp t\u0103ng l\u00ean, nguy c\u01a1 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng gh\u00e9p t\u1eeb s\u1ebd gia t\u0103ng. Trong thi\u1ebft k\u1ebf HDI, b\u1ea1n ph\u1ea3i \u0111\u1ea3m b\u1ea3o c\u1ea5u tr\u00fac l\u1edbp x\u1ebfp ch\u1ed3ng ph\u00f9 h\u1ee3p. C\u1ea7n b\u1ed1 tr\u00ed \u0111\u1ee7 c\u00e1c l\u1edbp m\u1eb7t \u0111\u1ea5t \u0111\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng d\u1eabn tr\u1edf v\u1ec1 c\u00f3 tr\u1edf kh\u00e1ng th\u1ea5p.<\/p>\n<p data-start=\"3973\" data-end=\"4223\">\u0110\u1eb7t c\u00e1c l\u1edbp \u0111\u1ecbnh tuy\u1ebfn b\u00ean trong gi\u1eefa c\u00e1c l\u1edbp n\u1ed1i \u0111\u1ea5t ho\u1eb7c l\u1edbp ngu\u1ed3n \u0111\u1ec3 gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng gh\u00e9p ch\u00e9o v\u00e0 nhi\u1ec5u ch\u00e9o. Gi\u1eef cho c\u00e1c \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao ng\u1eafn v\u00e0 c\u00e1c \u0111\u01b0\u1eddng d\u1eabn tr\u1edf v\u1ec1 c\u0169ng ph\u1ea3i ng\u1eafn. Thi\u1ebft k\u1ebf c\u00e1c l\u1ed7 vi m\u1ea1ch sao cho ch\u00fang gi\u1edbi h\u1ea1n c\u00e1c \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u trong m\u1ed9t khu v\u1ef1c nh\u1ecf. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m nguy c\u01a1 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI).<\/p>\n<p data-start=\"4225\" data-end=\"4304\">V\u00ec l\u00fd do an to\u00e0n, h\u00e3y s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 m\u00f4 ph\u1ecfng ph\u00f9 h\u1ee3p \u0111\u1ec3 m\u00f4 ph\u1ecfng b\u1ea3ng m\u1ea1ch in HDI tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t.<\/p>\n<hr data-start=\"4306\" data-end=\"4309\" \/>\n<h1 data-start=\"4311\" data-end=\"4338\">Nh\u1eefng l\u1ee3i \u00edch ch\u00ednh c\u1ee7a b\u1ea3ng m\u1ea1ch in HDI<\/h1>\n<p data-start=\"4339\" data-end=\"4522\">Nhi\u1ec1u ng\u01b0\u1eddi mong mu\u1ed1n gi\u1ea3m k\u00edch th\u01b0\u1edbc s\u1ea3n ph\u1ea9m. M\u1ed9t trong nh\u1eefng c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch in HDI. Khi b\u1ea1n c\u1ea7n gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 k\u00edch th\u01b0\u1edbc nh\u01b0ng v\u1eabn \u0111\u1ea3m b\u1ea3o ch\u1ee9c n\u0103ng v\u00e0 \u0111\u1ed9 tin c\u1eady, HDI l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p.<\/p>\n<p data-start=\"4524\" data-end=\"4537\">Nh\u1eefng l\u1ee3i \u00edch ch\u00ednh:<\/p>\n<ul data-start=\"4538\" data-end=\"4961\">\n<li data-start=\"4538\" data-end=\"4689\">\n<p data-start=\"4540\" data-end=\"4689\">HDI cho ph\u00e9p s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 pad-in-pad v\u00e0 l\u1ed7 m\u00f9. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed g\u1ea7n nhau h\u01a1n v\u00e0 gi\u1ea3m chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn. \u0110\u01b0\u1eddng d\u1eabn ng\u1eafn h\u01a1n th\u01b0\u1eddng mang l\u1ea1i t\u00edn hi\u1ec7u nhanh h\u01a1n v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>\n<\/li>\n<li data-start=\"4690\" data-end=\"4825\">\n<p data-start=\"4692\" data-end=\"4825\">C\u00e1c bo m\u1ea1ch n\u00e0y mang l\u1ea1i hi\u1ec7u su\u1ea5t t\u1ed1t v\u1edbi m\u1ee9c gi\u00e1 h\u1ee3p l\u00fd. HDI l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p v\u1ec1 m\u1eb7t chi ph\u00ed cho nh\u1eefng ai c\u1ea7n c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111\u00e1ng tin c\u1eady v\u00e0 b\u1ec1n b\u1ec9.<\/p>\n<\/li>\n<li data-start=\"4826\" data-end=\"4961\">\n<p data-start=\"4828\" data-end=\"4961\">\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh xem HDI c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n hay kh\u00f4ng, h\u00e3y t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 c\u00f4ng ngh\u1ec7 n\u00e0y v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng n\u00f3. N\u1eafm r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa PCB th\u00f4ng th\u01b0\u1eddng v\u00e0 PCB HDI.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"4963\" data-end=\"4966\" \/>\n<h1 data-start=\"4968\" data-end=\"4999\">Hi\u1ec7n nay, PCB HDI \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng \u1edf \u0111\u00e2u<\/h1>\n<p data-start=\"5000\" data-end=\"5058\">Nh\u1edd nh\u1eefng \u01b0u \u0111i\u1ec3m c\u1ee7a m\u00ecnh, b\u1ea3ng m\u1ea1ch in HDI \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c.<\/p>\n<ol data-start=\"5060\" data-end=\"5687\">\n<li data-start=\"5060\" data-end=\"5305\">\n<p data-start=\"5063\" data-end=\"5305\">Thi\u1ebft b\u1ecb y t\u1ebf \u2014 Nhi\u1ec1u d\u1ee5ng c\u1ee5 y t\u1ebf ph\u1ea3i c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn. Thi\u1ebft b\u1ecb ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 c\u00e1c thi\u1ebft b\u1ecb c\u1ea5y gh\u00e9p th\u01b0\u1eddng c\u1ea7n c\u00e1c b\u1ea3ng m\u1ea1ch si\u00eau nh\u1ecf. C\u00f4ng ngh\u1ec7 HDI ph\u00e1t huy t\u00e1c d\u1ee5ng trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y. M\u00e1y t\u1ea1o nh\u1ecbp tim l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh. Nhi\u1ec1u thi\u1ebft b\u1ecb theo d\u00f5i v\u00e0 th\u0103m d\u00f2, nh\u01b0 \u1ed1ng n\u1ed9i soi, c\u0169ng s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 HDI. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, k\u00edch th\u01b0\u1edbc c\u00e0ng nh\u1ecf th\u00ec c\u00e0ng t\u1ed1t.<\/p>\n<\/li>\n<li data-start=\"5307\" data-end=\"5431\">\n<p data-start=\"5310\" data-end=\"5431\">\u00d4 t\u00f4 \u2014 Xe \u00f4 t\u00f4 t\u1eadn d\u1ee5ng kh\u00f4ng gian m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. M\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed tr\u00ean xe \u0111ang ng\u00e0y c\u00e0ng nh\u1ecf g\u1ecdn h\u01a1n. C\u00f4ng ngh\u1ec7 HDI gi\u00fap gi\u1ea3m k\u00edch th\u01b0\u1edbc m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o ch\u1ee9c n\u0103ng.<\/p>\n<\/li>\n<li data-start=\"5433\" data-end=\"5537\">\n<p data-start=\"5436\" data-end=\"5537\">Thi\u1ebft b\u1ecb di \u0111\u1ed9ng \u2014 M\u00e1y t\u00ednh b\u1ea3ng v\u00e0 \u0111i\u1ec7n tho\u1ea1i s\u1eed d\u1ee5ng HDI. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c thi\u1ebft b\u1ecb n\u00e0y ng\u00e0y c\u00e0ng m\u1ecfng h\u01a1n theo th\u1eddi gian.<\/p>\n<\/li>\n<li data-start=\"5539\" data-end=\"5687\">\n<p data-start=\"5542\" data-end=\"5687\">H\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 qu\u1ed1c ph\u00f2ng \u2014 C\u00e1c l\u0129nh v\u1ef1c n\u00e0y s\u1eed d\u1ee5ng HDI nh\u1edd t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn c\u1ee7a n\u00f3. HDI ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i h\u01a1n khi c\u00e1c thi\u1ebft k\u1ebf m\u1edbi \u0111\u00f2i h\u1ecfi c\u00e1c bo m\u1ea1ch nh\u1ecf g\u1ecdn v\u00e0 \u1ed5n \u0111\u1ecbnh.<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"5689\" data-end=\"5739\">Trong t\u01b0\u01a1ng lai, nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c s\u1ebd \u00e1p d\u1ee5ng Ch\u1ec9 s\u1ed1 Ph\u00e1t tri\u1ec3n Con ng\u01b0\u1eddi (HDI) nhi\u1ec1u h\u01a1n.<\/p>\n<p data-start=\"5689\" data-end=\"5739\">\u00a0<\/p>\n<p data-start=\"5689\" data-end=\"5739\"><img decoding=\"async\" class=\"size-full wp-image-2704 aligncenter\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Mobile-devices-use-HDI.webp\" alt=\"\" width=\"420\" height=\"280\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Mobile-devices-use-HDI.webp 420w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Mobile-devices-use-HDI-300x200.webp 300w\" sizes=\"(max-width: 420px) 100vw, 420px\" \/><\/p>\n<p data-start=\"5689\" data-end=\"5739\">\u00a0<\/p>\n<hr data-start=\"5741\" data-end=\"5744\" \/>\n<h1 data-start=\"5746\" data-end=\"5780\">\u0110i\u1ec1u g\u00ec l\u00e0m n\u00ean m\u1ed9t b\u1ea3ng m\u1ea1ch in HDI?<\/h1>\n<p data-start=\"5781\" data-end=\"6033\">M\u1ed9t b\u1ea3ng m\u1ea1ch in HDI s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p m\u1ea1 l\u1ed7 m\u00f9 v\u00e0 sau \u0111\u00f3 l\u00e0 b\u01b0\u1edbc \u00e9p l\u1edbp th\u1ee9 hai. C\u00e1c b\u1ea3ng m\u1ea1ch n\u00e0y c\u00f3 th\u1ec3 thu\u1ed9c c\u1ea5p \u0111\u1ed9 1, c\u1ea5p \u0111\u1ed9 2, c\u1ea5p \u0111\u1ed9 3 ho\u1eb7c cao h\u01a1n. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng ch\u1ebf t\u1ea1o b\u1ea3ng m\u1ea1ch HDI theo t\u1eebng b\u01b0\u1edbc \u00e9p l\u1edbp. S\u1ed1 b\u01b0\u1edbc \u00e9p l\u1edbp c\u00e0ng nhi\u1ec1u th\u00ec c\u1ea5p \u0111\u1ed9 k\u1ef9 thu\u1eadt c\u00e0ng cao.<\/p>\n<ul data-start=\"6035\" data-end=\"6248\">\n<li data-start=\"6035\" data-end=\"6084\">\n<p data-start=\"6037\" data-end=\"6084\">C\u00e1c b\u1ea3ng m\u1ea1ch HDI c\u01a1 b\u1ea3n th\u01b0\u1eddng ch\u1ec9 tr\u1ea3i qua m\u1ed9t c\u00f4ng \u0111o\u1ea1n \u00e9p l\u1edbp.<\/p>\n<\/li>\n<li data-start=\"6085\" data-end=\"6138\">\n<p data-start=\"6087\" data-end=\"6138\">Ch\u1ec9 s\u1ed1 ph\u00e1t tri\u1ec3n con ng\u01b0\u1eddi (HDI) \u1edf m\u1ee9c cao h\u01a1n s\u1eed d\u1ee5ng hai ho\u1eb7c nhi\u1ec1u b\u01b0\u1edbc \u00e9p l\u1edbp.<\/p>\n<\/li>\n<li data-start=\"6139\" data-end=\"6248\">\n<p data-start=\"6141\" data-end=\"6248\">C\u00e1c m\u1ea1ch in c\u00f3 ch\u1ec9 s\u1ed1 ph\u00e1t tri\u1ec3n con ng\u01b0\u1eddi (HDI) c\u1ea5p cao c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 vias x\u1ebfp ch\u1ed3ng, l\u1ed7 vias m\u1ea1 v\u00e0 l\u1ea5p \u0111\u1ea7y, khoan tr\u1ef1c ti\u1ebfp b\u1eb1ng laser v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00ean ti\u1ebfn kh\u00e1c.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6250\" data-end=\"6314\">B\u00e2y gi\u1edd ch\u00fang ta s\u1ebd gi\u1ea3i th\u00edch v\u1ec1 c\u00e1c c\u1ea5u tr\u00fac l\u1edbp ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n x\u00e2y d\u1ef1ng ch\u00fang.<\/p>\n<hr data-start=\"6316\" data-end=\"6319\" \/>\n<h1 data-start=\"6321\" data-end=\"6359\">B\u1ea3ng m\u1ea1ch HDI \u0111\u01a1n l\u1edbp \u0111\u01a1n gi\u1ea3n (v\u00ed d\u1ee5)<\/h1>\n<p data-start=\"6360\" data-end=\"6700\">M\u1ed9t b\u1ea3ng m\u1ea1ch HDI \u0111\u01a1n l\u1edbp \u0111\u01a1n gi\u1ea3n c\u00f3 th\u1ec3 l\u00e0 b\u1ea3ng m\u1ea1ch 6 l\u1edbp v\u1edbi c\u1ea5u tr\u00fac x\u1ebfp ch\u1ed3ng 1+4+1. B\u1ea3ng m\u1ea1ch n\u00e0y r\u1ea5t \u0111\u01a1n gi\u1ea3n. Ph\u1ea7n b\u1ea3ng m\u1ea1ch \u0111a l\u1edbp b\u00ean trong kh\u00f4ng c\u00f3 l\u1ed7 vias ch\u00f4n ng\u1ea7m. Ch\u1ec9 c\u1ea7n m\u1ed9t l\u1ea7n \u00e9p l\u1edbp l\u00e0 ho\u00e0n th\u00e0nh b\u1ea3ng m\u1ea1ch. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c b\u1ea3ng m\u1ea1ch \u0111a l\u1edbp \u0111\u01a1n l\u1edbp th\u00f4ng th\u01b0\u1eddng. Tuy nhi\u00ean, sau khi \u00e9p l\u1edbp, b\u1ea1n v\u1eabn c\u1ea7n ti\u1ebfn h\u00e0nh khoan laser cho c\u00e1c l\u1ed7 vias m\u00f9 v\u00e0 c\u00e1c b\u01b0\u1edbc kh\u00e1c.<\/p>\n<hr data-start=\"6702\" data-end=\"6705\" \/>\n<h1 data-start=\"6707\" data-end=\"6749\">HDI m\u1ed9t l\u1edbp th\u00f4ng th\u01b0\u1eddng (tr\u01b0\u1eddng h\u1ee3p ph\u1ed5 bi\u1ebfn)<\/h1>\n<p data-start=\"6750\" data-end=\"7221\">M\u1ed9t b\u1ea3ng m\u1ea1ch HDI m\u1ed9t l\u1edbp th\u00f4ng th\u01b0\u1eddng c\u00f3 c\u1ea5u tr\u00fac (1 + N + 1), trong \u0111\u00f3 N \u2265 2 v\u00e0 N l\u00e0 s\u1ed1 ch\u1eb5n. V\u00ed d\u1ee5, m\u1ed9t HDI 6 l\u1edbp \u0111\u01a1n l\u1edbp s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac 1+4+1. C\u1ea5u tr\u00fac n\u00e0y l\u00e0 thi\u1ebft k\u1ebf ch\u1ee7 \u0111\u1ea1o cho HDI \u0111\u01a1n l\u1edbp. L\u1edbp \u0111a l\u1edbp b\u00ean trong th\u01b0\u1eddng c\u00f3 c\u00e1c l\u1ed7 vias ch\u00f4n ng\u1ea7m, \u0111\u00f2i h\u1ecfi m\u1ed9t b\u01b0\u1edbc \u00e9p l\u1edbp th\u1ee9 hai \u0111\u1ec3 ho\u00e0n thi\u1ec7n. Lo\u1ea1i HDI \u0111\u01a1n l\u1edbp n\u00e0y th\u01b0\u1eddng c\u00f3 c\u00e1c l\u1ed7 vias m\u00f9 v\u00e0 l\u1ed7 vias ch\u00f4n ng\u1ea7m. N\u1ebfu c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i lo\u1ea1i n\u00e0y th\u00e0nh d\u1ea1ng \u0111\u01a1n l\u1edbp \u0111\u01a1n gi\u1ea3n nh\u01b0 tr\u00ean, c\u1ea3 ng\u01b0\u1eddi mua v\u00e0 nh\u00e0 cung c\u1ea5p \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u1ee3i.<\/p>\n<hr data-start=\"7223\" data-end=\"7226\" \/>\n<h1 data-start=\"7228\" data-end=\"7270\">HDI hai l\u1edbp th\u00f4ng th\u01b0\u1eddng (tr\u01b0\u1eddng h\u1ee3p ph\u1ed5 bi\u1ebfn)<\/h1>\n<p data-start=\"7271\" data-end=\"7697\">M\u1ed9t b\u1ea3ng m\u1ea1ch HDI hai l\u1edbp ph\u1ed5 bi\u1ebfn c\u00f3 th\u1ec3 l\u00e0 b\u1ea3ng m\u1ea1ch 8 l\u1edbp v\u1edbi c\u1ea5u tr\u00fac x\u1ebfp ch\u1ed3ng 1+1+4+1+1. C\u1ea5u tr\u00fac x\u1ebfp ch\u1ed3ng n\u00e0y l\u00e0 (1+1+N+1+1) v\u1edbi N \u2265 2 v\u00e0 l\u00e0 s\u1ed1 ch\u1eb5n. \u0110\u00e2y l\u00e0 thi\u1ebft k\u1ebf hai l\u1edbp ch\u1ee7 \u0111\u1ea1o trong ng\u00e0nh c\u00f4ng nghi\u1ec7p PCB. L\u1edbp \u0111a l\u1edbp b\u00ean trong c\u00f3 c\u00e1c l\u1ed7 vias ch\u00f4n ng\u1ea7m c\u1ea7n ba b\u01b0\u1edbc \u00e9p l\u1edbp. Lo\u1ea1i n\u00e0y th\u01b0\u1eddng kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac x\u1ebfp ch\u1ed3ng l\u1ed7 vias l\u1ec7ch pha. N\u1ebfu b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n c\u00e1c l\u1ed7 vias ch\u00f4n ng\u1ea7m t\u1eeb c\u00e1c l\u1edbp 3\u20136 sang c\u00e1c l\u1edbp 2\u20137, b\u1ea1n c\u00f3 th\u1ec3 gi\u1ea3m b\u1edbt m\u1ed9t b\u01b0\u1edbc \u00e9p l\u1edbp v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed.<\/p>\n<hr data-start=\"7699\" data-end=\"7702\" \/>\n<h1 data-start=\"7704\" data-end=\"7740\">M\u1ed9t lo\u1ea1i HDI hai l\u1edbp ph\u1ed5 bi\u1ebfn kh\u00e1c<\/h1>\n<p data-start=\"7741\" data-end=\"8283\">Lo\u1ea1i n\u00e0y c\u0169ng s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac (1+1+N+1+1). M\u1eb7c d\u00f9 \u0111\u00e2y l\u00e0 c\u1ea5u tr\u00fac hai l\u1edbp, nh\u01b0ng l\u1ed7 via ch\u00f4n ng\u1ea7m l\u1ea1i n\u1eb1m \u1edf v\u1ecb tr\u00ed kh\u00e1c \u2014 gi\u1eefa l\u1edbp 2 v\u00e0 l\u1edbp 7. S\u1ef1 thay \u0111\u1ed5i n\u00e0y c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m s\u1ed1 b\u01b0\u1edbc \u00e9p l\u1edbp t\u1eeb ba xu\u1ed1ng c\u00f2n hai. Tuy nhi\u00ean, thi\u1ebft k\u1ebf n\u00e0y c\u00f3 m\u1ed9t \u0111i\u1ec3m kh\u00f3 kh\u0103n: n\u00f3 c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c l\u1ed7 via m\u00f9 t\u1eeb c\u00e1c l\u1edbp 1\u20133. B\u1ea1n ph\u1ea3i chia ch\u00fang th\u00e0nh hai b\u1ed9 (1\u20132 v\u00e0 2\u20133) v\u00e0 t\u1ea1o c\u00e1c l\u1ed7 d\u1eabn n\u1ed9i b\u1ed9 2\u20133 b\u1ecb che khu\u1ea5t b\u1eb1ng c\u00e1ch l\u1ea5p \u0111\u1ea7y l\u1ed7 d\u1eabn. Vi\u1ec7c l\u1ea5p \u0111\u1ea7y l\u1ed7 d\u1eabn l\u00e0m t\u0103ng chi ph\u00ed v\u00e0 \u0111\u1ed9 kh\u00f3. V\u00ec v\u1eady, trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf, h\u00e3y c\u1ed1 g\u1eafng tr\u00e1nh c\u00e1c l\u1ed7 d\u1eabn x\u1ebfp ch\u1ed3ng l\u00ean nhau v\u00e0 thay \u0111\u1ed5i c\u00e1c l\u1ed7 d\u1eabn b\u1ecb che khu\u1ea5t 1\u20133 th\u00e0nh c\u00e1c l\u1ed7 d\u1eabn b\u1ecb che khu\u1ea5t v\u00e0 l\u1ed7 d\u1eabn ch\u00f4n l\u1ea5p 1\u20132 v\u00e0 2\u20133 xen k\u1ebd.<\/p>\n<hr data-start=\"8285\" data-end=\"8288\" \/>\n<h1 data-start=\"8290\" data-end=\"8348\">Lo\u1ea1i HDI hai l\u1edbp hi\u1ebfm g\u1eb7p c\u00f3 l\u1ed7 th\u00f4ng m\u00f9 xuy\u00ean l\u1edbp<\/h1>\n<p data-start=\"8349\" data-end=\"8842\">M\u1ed9t lo\u1ea1i b\u1ea3ng m\u1ea1ch HDI 6 l\u1edbp hai l\u1edbp laminate kh\u00f4ng ph\u1ed5 bi\u1ebfn s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac 1+1+2+1+1. Thi\u1ebft k\u1ebf n\u00e0y v\u1eabn \u00e1p d\u1ee5ng nguy\u00ean l\u00fd (1+1+N+1+1) v\u1edbi N \u2265 2 v\u00e0 l\u00e0 s\u1ed1 ch\u1eb5n. Thi\u1ebft k\u1ebf n\u00e0y c\u00f3 c\u00e1c l\u1ed7 m\u00f9 xuy\u00ean l\u1edbp. \u0110\u1ed9 s\u00e2u c\u1ee7a l\u1ed7 m\u00f9 t\u0103ng l\u00ean \u2014 l\u1ed7 m\u00f9 c\u00f3 \u0111\u1ed9 s\u00e2u 1\u20133 g\u1ea5p \u0111\u00f4i \u0111\u1ed9 s\u00e2u c\u1ee7a l\u1ed7 m\u00f9 th\u00f4ng th\u01b0\u1eddng 1\u20132. Kh\u00e1ch h\u00e0ng ch\u1ecdn thi\u1ebft k\u1ebf n\u00e0y c\u00f3 nhu c\u1ea7u c\u1ee5 th\u1ec3 v\u00e0 kh\u00f4ng mu\u1ed1n l\u1ed7 m\u00f9 \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c l\u1ed7 x\u1ebfp ch\u1ed3ng l\u00ean nhau. C\u00e1c l\u1ed7 m\u00f9 xuy\u00ean l\u1edbp n\u00e0y r\u1ea5t kh\u00f3 khoan b\u1eb1ng laser. Vi\u1ec7c l\u1eafng \u0111\u1ecdng \u0111\u1ed3ng v\u00e0 m\u1ea1 tr\u00ean c\u00e1c l\u1ed7 m\u00f9 s\u00e2u nh\u01b0 v\u1eady c\u0169ng r\u1ea5t kh\u00f3 kh\u0103n.<\/p>\n<hr data-start=\"8844\" data-end=\"8847\" \/>\n<h1 data-start=\"8849\" data-end=\"8898\">Thi\u1ebft k\u1ebf l\u1ed7 th\u00f4ng qua x\u1ebfp ch\u1ed3ng trong b\u1ea3ng m\u1ea1ch HDI hai l\u1edbp<\/h1>\n<p data-start=\"8899\" data-end=\"9278\">C\u00f3 m\u1ed9t lo\u1ea1i b\u1ea3ng m\u1ea1ch trong \u0111\u00f3 c\u00e1c l\u1ed7 vias ch\u00f4n ng\u1ea7m \u1edf c\u00e1c l\u1edbp 2\u20137 c\u1ea7n c\u00f3 c\u00e1c l\u1ed7 vias m\u00f9 x\u1ebfp ch\u1ed3ng ph\u00eda tr\u00ean. \u0110\u00e2y v\u1eabn l\u00e0 c\u1ea5u tr\u00fac (1+1+N+1+1). M\u1ed9t s\u1ed1 b\u1ea3ng m\u1ea1ch HDI hai l\u1edbp s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y. Ph\u1ea7n nhi\u1ec1u l\u1edbp b\u00ean trong c\u00f3 c\u00e1c l\u1ed7 vias ch\u00f4n ng\u1ea7m v\u00e0 c\u1ea7n hai b\u01b0\u1edbc \u00e9p l\u1edbp. \u0110i\u1ec3m m\u1ea5u ch\u1ed1t l\u00e0 thi\u1ebft k\u1ebf l\u1ed7 vias x\u1ebfp ch\u1ed3ng l\u00e0m t\u0103ng \u0111\u1ed9 ph\u1ee9c t\u1ea1p. Tuy nhi\u00ean, vi\u1ec7c \u0111\u1eb7t c\u00e1c l\u1ed7 vias ch\u00f4n ng\u1ea7m \u1edf c\u00e1c l\u1edbp 2\u20137 gi\u00fap gi\u1ea3m b\u1edbt m\u1ed9t b\u01b0\u1edbc \u00e9p l\u1edbp v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed.<\/p>\n<hr data-start=\"9280\" data-end=\"9283\" \/>\n<h1 data-start=\"9285\" data-end=\"9338\">Thi\u1ebft k\u1ebf l\u1ed7 th\u00f4ng qua m\u00f9 xuy\u00ean l\u1edbp trong b\u1ea3ng m\u1ea1ch HDI hai l\u1edbp<\/h1>\n<p data-start=\"9339\" data-end=\"9875\">M\u1ed9t thi\u1ebft k\u1ebf nhi\u1ec1u l\u1edbp k\u00e9p kh\u00e1c (1+1+N+1+1) bao g\u1ed3m c\u00e1c l\u1ed7 th\u00f4ng m\u00f9 xuy\u00ean l\u1edbp. Thi\u1ebft k\u1ebf n\u00e0y kh\u00f3 s\u1ea3n xu\u1ea5t h\u01a1n v\u00e0 m\u1ed9t s\u1ed1 nh\u00e0 s\u1ea3n xu\u1ea5t HDI ch\u01b0a c\u00f3 \u0111\u1ee7 k\u1ef9 n\u0103ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n. Ph\u1ea7n nhi\u1ec1u l\u1edbp b\u00ean trong c\u00f3 c\u00e1c l\u1ed7 th\u00f4ng ch\u00f4n ng\u1ea7m \u1edf c\u00e1c l\u1edbp 3\u20136 v\u00e0 c\u1ea7n ba b\u01b0\u1edbc \u00e9p l\u1edbp. V\u1ea5n \u0111\u1ec1 ch\u00ednh l\u00e0 thi\u1ebft k\u1ebf l\u1ed7 d\u1eabn m\u00f9 xuy\u00ean l\u1edbp. N\u1ebfu b\u1ea1n c\u00f3 th\u1ec3 chia l\u1ed7 d\u1eabn xuy\u00ean l\u1edbp 1\u20133 th\u00e0nh c\u00e1c l\u1ed7 d\u1eabn m\u00f9 1\u20132 v\u00e0 2\u20133, chi ph\u00ed s\u1ebd gi\u1ea3m v\u00e0 quy tr\u00ecnh tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n h\u01a1n. L\u01b0u \u00fd: s\u1ef1 chia t\u00e1ch n\u00e0y kh\u00e1c v\u1edbi s\u1ef1 chia t\u00e1ch l\u1ed7 d\u1eabn x\u1ebfp ch\u1ed3ng \u0111\u00e3 gi\u1ea3i th\u00edch tr\u01b0\u1edbc \u0111\u00f3. S\u1ef1 chia t\u00e1ch n\u00e0y s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 d\u1eabn m\u00f9 so le thay v\u00ec c\u00e1c l\u1ed7 d\u1eabn m\u00f9 x\u1ebfp ch\u1ed3ng.<\/p>\n<hr data-start=\"9877\" data-end=\"9880\" \/>\n<h1 data-start=\"9882\" data-end=\"9897\">C\u00e1c m\u1ee9c \u0111\u1ed9 c\u1ee7a Ch\u1ec9 s\u1ed1 Ph\u00e1t tri\u1ec3n Con ng\u01b0\u1eddi (HDI)<\/h1>\n<ul data-start=\"9898\" data-end=\"10118\">\n<li data-start=\"9898\" data-end=\"9974\">\n<p data-start=\"9900\" data-end=\"9974\">Ch\u1ec9 s\u1ed1 Ph\u00e1t tri\u1ec3n Con ng\u01b0\u1eddi (HDI) c\u1ea5p \u0111\u1ed9 1 (c\u1ea5p 1) kh\u00e1 \u0111\u01a1n gi\u1ea3n. Qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n v\u00e0 vi\u1ec7c ki\u1ec3m so\u00e1t c\u0169ng d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n<\/li>\n<li data-start=\"9975\" data-end=\"10042\">\n<p data-start=\"9977\" data-end=\"10042\">Ch\u1ec9 s\u1ed1 Ph\u00e1t tri\u1ec3n Con ng\u01b0\u1eddi (HDI) c\u1ea5p hai ph\u1ee9c t\u1ea1p h\u01a1n trong l\u0129nh v\u1ef1c s\u1ea3n xu\u1ea5t v\u00e0 ch\u1ebf t\u1ea1o.<\/p>\n<\/li>\n<li data-start=\"10043\" data-end=\"10118\">\n<p data-start=\"10045\" data-end=\"10118\">C\u00e1c c\u1ea5p \u0111\u1ed9 t\u1eeb c\u1ea5p 3 tr\u1edf l\u00ean tu\u00e2n theo c\u00e1c quy t\u1eafc c\u1ee7a c\u1ea5p \u0111\u1ed9 2 nh\u01b0ng ph\u1ee9c t\u1ea1p h\u01a1n.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"10120\" data-end=\"10123\" \/>\n<h1 data-start=\"10125\" data-end=\"10167\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa HDI v\u00e0 PCB th\u00f4ng th\u01b0\u1eddng<\/h1>\n<p data-start=\"10168\" data-end=\"10482\">B\u1ea3ng m\u1ea1ch HDI th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng k\u1ef9 thu\u1eadt \u00e9p l\u1edbp s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u l\u00f5i m\u1ecfng. S\u1ed1 l\u1edbp \u00e9p c\u00e0ng nhi\u1ec1u th\u00ec m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a quy tr\u00ecnh c\u00e0ng cao. H\u1ea7u h\u1ebft c\u00e1c b\u1ea3ng m\u1ea1ch HDI ch\u1ec9 s\u1eed d\u1ee5ng m\u1ed9t l\u1edbp \u00e9p. C\u00e1c b\u1ea3ng m\u1ea1ch HDI cao c\u1ea5p s\u1eed d\u1ee5ng hai ho\u1eb7c nhi\u1ec1u k\u1ef9 thu\u1eadt \u00e9p l\u1edbp v\u00e0 k\u1ebft h\u1ee3p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ti\u00ean ti\u1ebfn nh\u01b0 l\u1ed7 vias x\u1ebfp ch\u1ed3ng, l\u1ed7 vias m\u1ea1 l\u1ea5p \u0111\u1ea7y v\u00e0 khoan tr\u1ef1c ti\u1ebfp b\u1eb1ng laser.<\/p>\n<p data-start=\"10484\" data-end=\"10746\">Khi m\u1eadt \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a m\u1ed9t b\u1ea3ng m\u1ea1ch in (PCB) cao h\u01a1n so v\u1edbi b\u1ea3ng m\u1ea1ch t\u00e1m l\u1edbp, vi\u1ec7c s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00f4ng ngh\u1ec7 HDI th\u01b0\u1eddng c\u00f3 chi ph\u00ed th\u1ea5p h\u01a1n so v\u1edbi quy tr\u00ecnh \u00e9p v\u00e0 d\u00e1n l\u1edbp truy\u1ec1n th\u1ed1ng ph\u1ee9c t\u1ea1p. C\u00e1c b\u1ea3ng m\u1ea1ch HDI th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc cao h\u01a1n v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c t\u00edn hi\u1ec7u t\u1ed1t h\u01a1n so v\u1edbi c\u00e1c b\u1ea3ng m\u1ea1ch in truy\u1ec1n th\u1ed1ng.<\/p>\n<p data-start=\"10748\" data-end=\"10792\">Nh\u1eefng c\u1ea3i ti\u1ebfn kh\u00e1c c\u1ee7a HDI so v\u1edbi PCB th\u00f4ng th\u01b0\u1eddng:<\/p>\n<ul data-start=\"10793\" data-end=\"10940\">\n<li data-start=\"10793\" data-end=\"10843\">\n<p data-start=\"10795\" data-end=\"10843\">Hi\u1ec7u su\u1ea5t t\u1ed1t h\u01a1n \u0111\u1ed1i v\u1edbi t\u00edn hi\u1ec7u vi s\u00f3ng v\u00e0 t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn.<\/p>\n<\/li>\n<li data-start=\"10844\" data-end=\"10914\">\n<p data-start=\"10846\" data-end=\"10914\">Kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u s\u00f3ng v\u00f4 tuy\u1ebfn v\u00e0 ph\u00f3ng \u0111i\u1ec7n t\u0129nh t\u1ed1t h\u01a1n.<\/p>\n<\/li>\n<li data-start=\"10915\" data-end=\"10940\">\n<p data-start=\"10917\" data-end=\"10940\">Kh\u1ea3 n\u0103ng d\u1eabn nhi\u1ec7t t\u1ed1t h\u01a1n.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10942\" data-end=\"11053\">C\u00f4ng ngh\u1ec7 t\u00edch h\u1ee3p m\u1eadt \u0111\u1ed9 cao (HDI) gi\u00fap c\u00e1c s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng tr\u1edf n\u00ean nh\u1ecf g\u1ecdn h\u01a1n v\u00e0 \u0111\u1ed3ng nh\u1ea5t h\u01a1n v\u1ec1 ch\u1ee9c n\u0103ng c\u0169ng nh\u01b0 hi\u1ec7u su\u1ea5t.<\/p>\n<hr data-start=\"11055\" data-end=\"11058\" \/>\n<h1 data-start=\"11060\" data-end=\"11100\">M\u1ed9t s\u1ed1 l\u1eddi khuy\u00ean \u0111\u01a1n gi\u1ea3n d\u00e0nh cho c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 ng\u01b0\u1eddi mua<\/h1>\n<ol data-start=\"11101\" data-end=\"11930\">\n<li data-start=\"11101\" data-end=\"11162\">\n<p data-start=\"11104\" data-end=\"11162\">H\u00e3y s\u1eed d\u1ee5ng HDI khi b\u1ea1n c\u1ea7n k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn h\u01a1n v\u00e0 hi\u1ec7u su\u1ea5t cao h\u01a1n.<\/p>\n<\/li>\n<li data-start=\"11163\" data-end=\"11245\">\n<p data-start=\"11166\" data-end=\"11245\">H\u00e3y li\u00ean h\u1ec7 v\u1edbi nh\u00e0 cung c\u1ea5p PCB c\u1ee7a b\u1ea1n t\u1eeb s\u1edbm. PCB HDI c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra thi\u1ebft k\u1ebf ph\u00f9 h\u1ee3p v\u1edbi quy tr\u00ecnh s\u1ea3n xu\u1ea5t (DFM).<\/p>\n<\/li>\n<li data-start=\"11246\" data-end=\"11315\">\n<p data-start=\"11249\" data-end=\"11315\">Y\u00eau c\u1ea7u c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n IPC. S\u1eed d\u1ee5ng IPC-2226 v\u00e0 IPC-6016 khi c\u00f3 th\u1ec3.<\/p>\n<\/li>\n<li data-start=\"11316\" data-end=\"11386\">\n<p data-start=\"11319\" data-end=\"11386\">L\u00ean k\u1ebf ho\u1ea1ch b\u1ed1 tr\u00ed c\u00e1c l\u1edbp m\u1ea1ch v\u1edbi \u0111\u1ee7 c\u00e1c l\u1edbp m\u1eb7t \u0111\u1ea5t \u0111\u1ec3 gi\u1eef cho \u0111\u01b0\u1eddng d\u1eabn tr\u1edf v\u1ec1 ng\u1eafn.<\/p>\n<\/li>\n<li data-start=\"11387\" data-end=\"11476\">\n<p data-start=\"11390\" data-end=\"11476\">H\u00e3y s\u1eed d\u1ee5ng k\u00edch th\u01b0\u1edbc l\u1ed7 microvia ph\u00f9 h\u1ee3p v\u1edbi kh\u1ea3 n\u0103ng s\u1ea3n xu\u1ea5t c\u1ee7a nh\u00e0 m\u00e1y PCB c\u1ee7a b\u1ea1n. K\u00edch th\u01b0\u1edbc ph\u1ed5 bi\u1ebfn: 3\u20135 mil, th\u01b0\u1eddng l\u00e0 4 mil.<\/p>\n<\/li>\n<li data-start=\"11477\" data-end=\"11569\">\n<p data-start=\"11480\" data-end=\"11569\">H\u00e3y c\u1ed1 g\u1eafng tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 vias x\u1ebfp ch\u1ed3ng l\u00ean nhau tr\u1eeb khi th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft. C\u00e1c l\u1ed7 vias m\u00f9\/ch\u00f4n l\u1ea5p xen k\u1ebd th\u01b0\u1eddng d\u1ec5 th\u1ef1c hi\u1ec7n h\u01a1n.<\/p>\n<\/li>\n<li data-start=\"11570\" data-end=\"11655\">\n<p data-start=\"11573\" data-end=\"11655\">N\u1ebfu b\u1ea1n ch\u1ecdn quy tr\u00ecnh \u00e9p laminate HDI nhi\u1ec1u b\u01b0\u1edbc, h\u00e3y chu\u1ea9n b\u1ecb cho vi\u1ec7c c\u00f3 th\u00eam c\u00e1c b\u01b0\u1edbc gia c\u00f4ng v\u00e0 ki\u1ec3m tra.<\/p>\n<\/li>\n<li data-start=\"11656\" data-end=\"11744\">\n<p data-start=\"11659\" data-end=\"11744\">S\u1eed d\u1ee5ng m\u00f4 ph\u1ecfng ph\u00f9 h\u1ee3p cho c\u00e1c thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao ho\u1eb7c t\u1ea7n s\u1ed1 v\u00f4 tuy\u1ebfn (RF) \u0111\u1ec3 ki\u1ec3m tra nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u.<\/p>\n<\/li>\n<li data-start=\"11745\" data-end=\"11832\">\n<p data-start=\"11748\" data-end=\"11832\">\u0110\u1ed1i v\u1edbi c\u1ea5u tr\u00fac ph\u00e2n nh\u00e1nh BGA, c\u00e1c l\u1ed7 vi m\u1ea1ch (microvias) v\u00e0 thi\u1ebft k\u1ebf pad-in-pad gi\u00fap gi\u1ea3m di\u1ec7n t\u00edch ph\u00e2n nh\u00e1nh v\u00e0 chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn.<\/p>\n<\/li>\n<li data-start=\"11833\" data-end=\"11930\">\n<p data-start=\"11837\" data-end=\"11930\">\u0110\u1ec3 ki\u1ec3m so\u00e1t chi ph\u00ed, h\u00e3y gi\u1ea3m s\u1ed1 b\u01b0\u1edbc \u00e9p m\u00e0ng khi c\u00f3 th\u1ec3. T\u1ed1i \u01b0u h\u00f3a th\u00f4ng qua vi\u1ec7c b\u1ed1 tr\u00ed.<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"11932\" data-end=\"11935\" \/>\n<h1 data-start=\"11937\" data-end=\"11954\">T\u00f3m t\u1eaft k\u1ebft lu\u1eadn<\/h1>\n<p data-start=\"11955\" data-end=\"12546\">B\u1ea3ng m\u1ea1ch HDI l\u00e0 lo\u1ea1i b\u1ea3ng m\u1ea1ch in (PCB) c\u00f3 m\u1eadt \u0111\u1ed9 k\u1ebft n\u1ed1i cao, s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 vi m\u1ea1ch \u1ea9n v\u00e0 ch\u00ecm. Ch\u00fang cho ph\u00e9p c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf b\u1ed1 tr\u00ed nhi\u1ec1u \u0111\u01b0\u1eddng d\u1eabn v\u00e0 linh ki\u1ec7n h\u01a1n trong kh\u00f4ng gian h\u1eb9p h\u01a1n. Qu\u00e1 tr\u00ecnh \u0111\u1ecbnh tuy\u1ebfn HDI \u0111\u00f2i h\u1ecfi k\u1ebf ho\u1ea1ch x\u1ebfp l\u1edbp c\u1ea9n th\u1eadn, c\u00e1c l\u1edbp m\u1eb7t \u0111\u1ea5t t\u1ed1t, vi\u1ec7c s\u1eed d\u1ee5ng l\u1ed7 vi m\u1ea1ch ch\u00ednh x\u00e1c v\u00e0 c\u00e1c ki\u1ec3m tra DFM ph\u00f9 h\u1ee3p. HDI mang l\u1ea1i nh\u1eefng l\u1ee3i \u00edch r\u00f5 r\u1ec7t v\u1ec1 k\u00edch th\u01b0\u1edbc, t\u1ed1c \u0111\u1ed9 t\u00edn hi\u1ec7u v\u00e0 hi\u1ec7u su\u1ea5t. HDI \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c, t\u1eeb y t\u1ebf v\u00e0 di \u0111\u1ed9ng \u0111\u1ebfn \u00f4 t\u00f4 v\u00e0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5. C\u1ea5p \u0111\u1ed9 HDI c\u00e0ng ph\u1ee9c t\u1ea1p, quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00e0ng ti\u00ean ti\u1ebfn v\u00e0 chi ph\u00ed c\u00e0ng cao. Thi\u1ebft k\u1ebf t\u1ed1t v\u00e0 giao ti\u1ebfp s\u1edbm v\u1edbi nh\u00e0 cung c\u1ea5p s\u1ebd gi\u00fap b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c b\u1ea3ng m\u1ea1ch HDI ph\u00f9 h\u1ee3p cho s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-s1ztwe2 elementor-section-content-top elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"s1ztwe2\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7882748\" data-id=\"7882748\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9fc6712 elementor-widget elementor-widget-heading\" data-id=\"9fc6712\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-631b990 elementor-widget elementor-widget-accordion\" data-id=\"631b990\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1031\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1031\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Microvias, blind vias v\u00e0 buried vias l\u00e0 g\u00ec?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1031\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1031\"><p>Microvias l\u00e0 c\u00e1c l\u1ed7 vias r\u1ea5t nh\u1ecf (th\u01b0\u1eddng \u0111\u01b0\u1ee3c khoan b\u1eb1ng laser) ch\u1ec9 k\u1ebft n\u1ed1i c\u00e1c l\u1edbp li\u1ec1n k\u1ec1. L\u1ed7 vias m\u00f9 k\u1ebft n\u1ed1i c\u00e1c l\u1edbp ngo\u00e0i v\u1edbi c\u00e1c l\u1edbp trong; l\u1ed7 vias ch\u00ecm ch\u1ec9 k\u1ebft n\u1ed1i c\u00e1c l\u1edbp trong. C\u00e1c lo\u1ea1i l\u1ed7 vias n\u00e0y gi\u00fap ti\u1ebft ki\u1ec7m kh\u00f4ng gian tr\u00ean b\u1ea3ng m\u1ea1ch v\u00e0 c\u1ea3i thi\u1ec7n vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1032\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1032\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Nh\u1eefng \u01b0u \u0111i\u1ec3m ch\u00ednh c\u1ee7a b\u1ea3ng m\u1ea1ch in HDI l\u00e0 g\u00ec?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1032\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1032\"><p>Nh\u1eefng l\u1ee3i \u00edch ch\u00ednh: m\u1eadt \u0111\u1ed9 linh ki\u1ec7n cao h\u01a1n, \u0111\u01b0\u1eddng truy\u1ec1n t\u00edn hi\u1ec7u ng\u1eafn h\u01a1n (\u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u t\u1ed1t h\u01a1n), s\u1ea3n ph\u1ea9m nh\u1ecf g\u1ecdn v\u00e0 nh\u1eb9 h\u01a1n, c\u00f9ng v\u1edbi vi\u1ec7c b\u1ed1 tr\u00ed m\u1ea1ch \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n cho c\u00e1c chip BGA c\u00f3 kho\u1ea3ng c\u00e1ch ch\u00e2n nh\u1ecf v\u00e0 m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1033\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1033\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 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aria-labelledby=\"elementor-tab-title-1033\"><p>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn: \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh v\u00e0 thi\u1ebft b\u1ecb di \u0111\u1ed9ng, thi\u1ebft b\u1ecb 5G v\u00e0 m\u1ea1ng, thi\u1ebft b\u1ecb y t\u1ebf, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, \u0111i\u1ec7n t\u1eed \u00f4 t\u00f4 v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m ti\u00eau d\u00f9ng nh\u1ecf g\u1ecdn.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1034\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1034\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 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class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1034\"><p>C\u00e1c quy t\u1eafc quan tr\u1ecdng: gi\u1edbi h\u1ea1n \u0111\u01b0\u1eddng k\u00ednh v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c l\u1ed7 microvia, ki\u1ec3m so\u00e1t \u0111\u1ed9 d\u00e0y v\u00e0 tr\u1edf kh\u00e1ng c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i, l\u1eadp k\u1ebf ho\u1ea1ch cho c\u00e1c \u0111\u01b0\u1eddng tho\u00e1t BGA (c\u1ea5u tr\u00fac ph\u00e2n nh\u00e1nh h\u00ecnh x\u01b0\u01a1ng ch\u00f3) v\u00e0 tr\u00e1nh s\u1eed d\u1ee5ng l\u1ed7 via n\u1eb1m trong pad tr\u1eeb khi \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ea5p \u0111\u1ea7y ho\u1eb7c l\u00e0m ph\u1eb3ng \u0111\u00fang c\u00e1ch. Tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc DFM v\u00e0 ma tr\u1eadn kh\u1ea3 n\u0103ng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1035\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1035\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-right\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><svg class=\"e-font-icon-svg e-fas-plus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><svg class=\"e-font-icon-svg e-fas-minus-circle\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\"><\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Ti\u00eau \u0111\u1ec1 d\u1ea1ng accordion<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1035\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1035\">Haitarin sis\u00e4lt\u00f6<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>What is an HDI PCB An HDI board is a high density interconnect printed circuit board. 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center\";s:15:\"background-size\";s:4:\"auto\";s:21:\"background-attachment\";s:6:\"scroll\";s:15:\"background-type\";s:0:\"\";s:16:\"background-media\";s:0:\"\";s:12:\"overlay-type\";s:0:\"\";s:13:\"overlay-color\";s:0:\"\";s:15:\"overlay-opacity\";s:0:\"\";s:16:\"overlay-gradient\";s:0:\"\";}}"],"footnotes":[""],"_elementor_edit_mode":["builder"],"_elementor_template_type":["wp-page"],"_elementor_data":["[{\"id\":\"c325e24\",\"elType\":\"container\",\"settings\":{\"flex_direction\":\"column\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"322b58b\"}]},\"elements\":[{\"id\":\"2ce50fb\",\"elType\":\"widget\",\"settings\":{\"editor\":\"<h2 data-start=\\\"78\\\" data-end=\\\"101\\\">What is an HDI PCB<\\\/h2>\\n<p data-start=\\\"102\\\" data-end=\\\"607\\\">An HDI board is a high density interconnect printed circuit board. It uses micro blind and buried vias. These boards have a high line density. They have inner layer traces and outer layer traces. They also use drilled holes and plated holes to link traces between layers. As electronic products get smaller and more precise, makers ask for denser PCBs. The best way to increase PCB density is to cut the number of through-holes and to add well-placed blind and buried vias. This need led to the HDI board.<\\\/p>\\n<p data-start=\\\"102\\\" data-end=\\\"607\\\">\\u00a0<\\\/p>\\n<p data-start=\\\"102\\\" data-end=\\\"607\\\"><img class=\\\"size-full wp-image-2703 aligncenter\\\" src=\\\"https:\\\/\\\/flj-pcb.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/hdi-pcb.webp\\\" alt=\\\"hdi pcb\\\" width=\\\"600\\\" height=\\\"450\\\" \\\/><\\\/p>\\n<p data-start=\\\"102\\\" data-end=\\\"607\\\">\\u00a0<\\\/p>\\n<h2 data-start=\\\"609\\\" data-end=\\\"626\\\">IPC definition<\\\/h2>\\n<p data-start=\\\"627\\\" data-end=\\\"681\\\"><a href=\\\"https:\\\/\\\/www.electronics.org\\\/TOC\\\/IPC-2226A.pdf?utm_source=chatgpt.com\\\">IPC-2226<\\\/a> gives a clear rule for blind and buried vias:<\\\/p>\\n<ul data-start=\\\"682\\\" data-end=\\\"1035\\\">\\n<li data-start=\\\"682\\\" data-end=\\\"734\\\">\\n<p data-start=\\\"684\\\" data-end=\\\"734\\\">Via or buried via diameter \\u2264 0.15 mm (0.00591 in).<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"735\\\" data-end=\\\"781\\\">\\n<p data-start=\\\"737\\\" data-end=\\\"781\\\">Annular ring diameter \\u2264 0.35 mm (0.0138 in).<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"782\\\" data-end=\\\"1035\\\">\\n<p data-start=\\\"784\\\" data-end=\\\"1035\\\">These vias can be made by laser or mechanical drilling, or by dry\\\/wet etching, or by pattern transfer. Then a conductive plating covers the hole.<br \\\/>Note: If the hole diameter is &gt; 0.15 mm (0.00591 in), treat it as a through-hole under the same standard.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<h2 data-start=\\\"1037\\\" data-end=\\\"1069\\\">Common drilling sizes for HDI<\\\/h2>\\n<p data-start=\\\"1070\\\" data-end=\\\"1183\\\">Common via sizes for HDI are 3\\u20135 mil. Designers most often use 4 mil as a middle value for design and production.<\\\/p>\\n<h2 data-start=\\\"1185\\\" data-end=\\\"1221\\\">Common IPC standards used for HDI<\\\/h2>\\n<p data-start=\\\"1222\\\" data-end=\\\"1265\\\">Typical IPC standards for HDI work include:<\\\/p>\\n<ol data-start=\\\"1266\\\" data-end=\\\"1627\\\">\\n<li data-start=\\\"1266\\\" data-end=\\\"1351\\\">\\n<p data-start=\\\"1269\\\" data-end=\\\"1351\\\">IPC\\\/JPCA-2315 \\u2014 Guide for high density interconnect structure and microvia design.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"1352\\\" data-end=\\\"1441\\\">\\n<p data-start=\\\"1355\\\" data-end=\\\"1441\\\">IPC-2226 \\u2014 Design standard for high density interconnect (HDI) printed circuit boards.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"1442\\\" data-end=\\\"1545\\\">\\n<p data-start=\\\"1445\\\" data-end=\\\"1545\\\">IPC\\\/JPCA-4104 \\u2014 Specification for dielectric material validation and performance for HDI structures.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"1546\\\" data-end=\\\"1627\\\">\\n<p data-start=\\\"1549\\\" data-end=\\\"1627\\\">IPC-6016 \\u2014 Specification for qualification and performance for HDI structures.<\\\/p>\\n<\\\/li>\\n<\\\/ol>\\n<hr data-start=\\\"1629\\\" data-end=\\\"1632\\\" \\\/>\\n<h1 data-start=\\\"1634\\\" data-end=\\\"1668\\\">HDI routing: challenges and tips<\\\/h1>\\n<h2 data-start=\\\"1670\\\" data-end=\\\"1695\\\">What HDI routing means<\\\/h2>\\n<p data-start=\\\"1696\\\" data-end=\\\"2034\\\">HDI routing means using the latest design ideas and manufacturing methods to make a denser layout without changing the circuit function. In short, HDI uses more routing layers, smaller traces, smaller vias, smaller pads, and thinner cores. This lets you fit complex and often high-speed circuits into spaces that were not possible before.<\\\/p>\\n<p data-start=\\\"2036\\\" data-end=\\\"2381\\\">As the manufacturing methods get better, HDI routing appears in many designs. You will find HDI in motherboards, graphics cards, phones, and other devices with little space. If you do HDI right, you can shrink the board size and also cut EMI problems on the PCB. Lowering cost is a key goal for many companies. HDI routing helps reach that goal.<\\\/p>\\n<h2 data-start=\\\"2383\\\" data-end=\\\"2411\\\">HDI routing and microvias<\\\/h2>\\n<p data-start=\\\"2412\\\" data-end=\\\"2575\\\">HDI routing is more complex than normal multi-layer routing. You might know how to design 8-layer or 16-layer PCBs. Still, HDI introduces new ideas you must learn.<\\\/p>\\n<p data-start=\\\"2577\\\" data-end=\\\"2941\\\">In a normal PCB, we view the whole board as one item with many layers. In HDI, designers must think of many ultra-thin layers stacked to form one board. The main driver for HDI routing is the via technology. Vias are no longer only the plated holes drilled through the finished stack. Traditional through-holes reduce the space available for routing on each layer.<\\\/p>\\n<p data-start=\\\"2577\\\" data-end=\\\"2941\\\">\\u00a0<\\\/p>\\n<p data-start=\\\"2577\\\" data-end=\\\"2941\\\"><img class=\\\"size-full wp-image-2702 aligncenter\\\" src=\\\"https:\\\/\\\/flj-pcb.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/HDI-microvias.webp\\\" alt=\\\"\\\" width=\\\"600\\\" height=\\\"414\\\" \\\/><\\\/p>\\n<p data-start=\\\"2577\\\" data-end=\\\"2941\\\">\\u00a0<\\\/p>\\n<h2 data-start=\\\"2943\\\" data-end=\\\"2982\\\">Traditional vias are not fit for HDI<\\\/h2>\\n<p data-start=\\\"2983\\\" data-end=\\\"3410\\\">In HDI routing, microvias are the key. They let many dense layers connect together. To explain, microvias look like blind or buried vias but follow a different method. Traditional vias are drilled after the layers are stacked. Microvias are laser drilled on layers before stacking. Laser-drilled microvias allow the smallest hole sizes and pad sizes between layers. This helps with <a href=\\\"https:\\\/\\\/flj-pcb.com\\\/pcb-assembly\\\/bga-assmebly\\\/\\\">BGA<\\\/a> fan-out layouts where pins sit in a grid.<\\\/p>\\n<h2 data-start=\\\"3412\\\" data-end=\\\"3437\\\">HDI routing strategies<\\\/h2>\\n<p data-start=\\\"3438\\\" data-end=\\\"3697\\\">With microvias, PCB designers can route complex networks on many layers. This method is sometimes called \\u201cany-layer HDI\\u201d or \\u201cper-layer interconnect.\\u201d Because microvias save space, both outer layers can host dense parts while most routing sits on inner layers.<\\\/p>\\n<h2 data-start=\\\"3699\\\" data-end=\\\"3739\\\">Low impedance ground planes are vital<\\\/h2>\\n<p data-start=\\\"3740\\\" data-end=\\\"3971\\\">When parts and traces get denser in a multilayer board, the risk of EMI and magnetic coupling rises. For HDI design you must ensure the stack has the right structure. Provide enough ground planes to give low impedance return paths.<\\\/p>\\n<p data-start=\\\"3973\\\" data-end=\\\"4223\\\">Place inner routing layers between ground or power layers to cut cross-coupling and crosstalk. Keep high-speed signal paths short and keep their return paths short too. Plan microvias so they limit signal paths to a small area. This reduces EMI risk.<\\\/p>\\n<p data-start=\\\"4225\\\" data-end=\\\"4304\\\">For safety, use proper simulation tools to model the HDI PCB before production.<\\\/p>\\n<hr data-start=\\\"4306\\\" data-end=\\\"4309\\\" \\\/>\\n<h1 data-start=\\\"4311\\\" data-end=\\\"4338\\\">Main benefits of HDI PCBs<\\\/h1>\\n<p data-start=\\\"4339\\\" data-end=\\\"4522\\\">Many people want to reduce product size. One of the best ways is to use HDI PCBs. When you need less weight and smaller size but keep function and reliability, HDI is a good solution.<\\\/p>\\n<p data-start=\\\"4524\\\" data-end=\\\"4537\\\">Key benefits:<\\\/p>\\n<ul data-start=\\\"4538\\\" data-end=\\\"4961\\\">\\n<li data-start=\\\"4538\\\" data-end=\\\"4689\\\">\\n<p data-start=\\\"4540\\\" data-end=\\\"4689\\\">HDI allows pad-in-pad and blind via use. This lets parts sit close and cuts trace length. Shorter traces often mean faster and more reliable signals.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"4690\\\" data-end=\\\"4825\\\">\\n<p data-start=\\\"4692\\\" data-end=\\\"4825\\\">These boards can give good performance at a fair cost. HDI is an affordable choice for people who need reliable, durable electronics.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"4826\\\" data-end=\\\"4961\\\">\\n<p data-start=\\\"4828\\\" data-end=\\\"4961\\\">To decide if HDI fits your project, learn more about them and how to use them. Know the differences between normal PCBs and HDI PCBs.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<hr data-start=\\\"4963\\\" data-end=\\\"4966\\\" \\\/>\\n<h1 data-start=\\\"4968\\\" data-end=\\\"4999\\\">Where HDI PCBs are used today<\\\/h1>\\n<p data-start=\\\"5000\\\" data-end=\\\"5058\\\">Because of their benefits, HDI PCBs appear in many fields.<\\\/p>\\n<ol data-start=\\\"5060\\\" data-end=\\\"5687\\\">\\n<li data-start=\\\"5060\\\" data-end=\\\"5305\\\">\\n<p data-start=\\\"5063\\\" data-end=\\\"5305\\\">Medical devices \\u2014 Many medical tools must be small. Lab gear and implants often need tiny boards. HDI helps here. A pacemaker is a good example. Many monitoring and probe tools, like endoscopes, use HDI too. In these cases, smaller is better.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"5307\\\" data-end=\\\"5431\\\">\\n<p data-start=\\\"5310\\\" data-end=\\\"5431\\\">Automotive \\u2014 Cars use space well. Some car electronics are getting smaller. HDI helps reduce size while keeping function.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"5433\\\" data-end=\\\"5537\\\">\\n<p data-start=\\\"5436\\\" data-end=\\\"5537\\\">Mobile devices \\u2014 Tablets and phones use HDI. This is why these devices become thinner as they evolve.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"5539\\\" data-end=\\\"5687\\\">\\n<p data-start=\\\"5542\\\" data-end=\\\"5687\\\">Aerospace and defense \\u2014 These fields use HDI for its reliability and small size. HDI shows up more as new designs need compact and stable boards.<\\\/p>\\n<\\\/li>\\n<\\\/ol>\\n<p data-start=\\\"5689\\\" data-end=\\\"5739\\\">Many other fields will use more HDI in the future.<\\\/p>\\n<p data-start=\\\"5689\\\" data-end=\\\"5739\\\">\\u00a0<\\\/p>\\n<p data-start=\\\"5689\\\" data-end=\\\"5739\\\"><img class=\\\"size-full wp-image-2704 aligncenter\\\" src=\\\"https:\\\/\\\/flj-pcb.com\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/Mobile-devices-use-HDI.webp\\\" alt=\\\"\\\" width=\\\"420\\\" height=\\\"280\\\" \\\/><\\\/p>\\n<p data-start=\\\"5689\\\" data-end=\\\"5739\\\">\\u00a0<\\\/p>\\n<hr data-start=\\\"5741\\\" data-end=\\\"5744\\\" \\\/>\\n<h1 data-start=\\\"5746\\\" data-end=\\\"5780\\\">What makes an HDI PCB an HDI PCB<\\\/h1>\\n<p data-start=\\\"5781\\\" data-end=\\\"6033\\\">An HDI PCB uses blind via plating and then a second lamination step. These boards can be first level, second level, third level, and higher. Makers usually build HDI boards by lamination steps. The more lamination steps, the higher the technical level.<\\\/p>\\n<ul data-start=\\\"6035\\\" data-end=\\\"6248\\\">\\n<li data-start=\\\"6035\\\" data-end=\\\"6084\\\">\\n<p data-start=\\\"6037\\\" data-end=\\\"6084\\\">Basic HDI boards often use one lamination step.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"6085\\\" data-end=\\\"6138\\\">\\n<p data-start=\\\"6087\\\" data-end=\\\"6138\\\">Higher level HDI uses two or more lamination steps.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"6139\\\" data-end=\\\"6248\\\">\\n<p data-start=\\\"6141\\\" data-end=\\\"6248\\\">High-level HDI may use stacked vias, plated filled vias, laser direct drilling, and other advanced methods.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<p data-start=\\\"6250\\\" data-end=\\\"6314\\\">Now we explain common layer stacks and how producers build them.<\\\/p>\\n<hr data-start=\\\"6316\\\" data-end=\\\"6319\\\" \\\/>\\n<h1 data-start=\\\"6321\\\" data-end=\\\"6359\\\">Simple single-laminate HDI (example)<\\\/h1>\\n<p data-start=\\\"6360\\\" data-end=\\\"6700\\\">A simple single-laminate HDI board can be a 6-layer board with a 1+4+1 stack. This board is simple. The inner multi-layer board has no buried vias. One lamination completes the board. The manufacturing is similar to normal multilayer single-laminate boards. But after lamination you still need laser drilling for blind vias and other steps.<\\\/p>\\n<hr data-start=\\\"6702\\\" data-end=\\\"6705\\\" \\\/>\\n<h1 data-start=\\\"6707\\\" data-end=\\\"6749\\\">Normal single-laminate HDI (common case)<\\\/h1>\\n<p data-start=\\\"6750\\\" data-end=\\\"7221\\\">A common single-laminate HDI has a structure (1 + N + 1) where N \\u2265 2 and N is even. For example, a single-laminate 6-layer HDI uses 1+4+1. This structure is the mainstream design for single-laminate HDI. The inner multi-layer often has buried vias that require a second lamination step to finish. This single-laminate type often has blind vias and buried vias. If designers can change this type into the simple single-laminate form above, both buyer and supplier benefit.<\\\/p>\\n<hr data-start=\\\"7223\\\" data-end=\\\"7226\\\" \\\/>\\n<h1 data-start=\\\"7228\\\" data-end=\\\"7270\\\">Normal double-laminate HDI (common case)<\\\/h1>\\n<p data-start=\\\"7271\\\" data-end=\\\"7697\\\">A common double-laminate HDI might be an 8-layer board with a 1+1+4+1+1 stack. This stack is (1+1+N+1+1) with N \\u2265 2 and even. This is the mainstream double-laminate design in the PCB industry. The inner multi-layer has buried vias that need three lamination steps. This type often does not have staggered via stacks. If you can change buried vias from layers 3\\u20136 to layers 2\\u20137, you can reduce one lamination step and cut cost.<\\\/p>\\n<hr data-start=\\\"7699\\\" data-end=\\\"7702\\\" \\\/>\\n<h1 data-start=\\\"7704\\\" data-end=\\\"7740\\\">Another common double-laminate HDI<\\\/h1>\\n<p data-start=\\\"7741\\\" data-end=\\\"8283\\\">This type also uses (1+1+N+1+1). Even though it is a double-laminate structure, the buried via sits in a different place \\u2014 between layers 2 and 7. This change can reduce lamination steps from three to two. But this design has one hard point: it can create blind vias from layers 1\\u20133. You must split those into two sets (1\\u20132 and 2\\u20133) and make the 2\\u20133 inner blind vias with via filling. Via filling adds cost and difficulty. So during design, try to avoid stacked vias and change 1\\u20133 blind vias into staggered 1\\u20132 and 2\\u20133 blind and buried vias.<\\\/p>\\n<hr data-start=\\\"8285\\\" data-end=\\\"8288\\\" \\\/>\\n<h1 data-start=\\\"8290\\\" data-end=\\\"8348\\\">Uncommon double-laminate HDI with cross-layer blind vias<\\\/h1>\\n<p data-start=\\\"8349\\\" data-end=\\\"8842\\\">One uncommon double-laminate HDI 6-layer board uses 1+1+2+1+1. It still uses the (1+1+N+1+1) idea with N \\u2265 2 and even. This design has cross-layer blind vias. The blind via depth grows \\u2014 a 1\\u20133 depth blind via is twice the depth of a normal 1\\u20132 blind via. Customers who choose this design have specific needs and do not want the blind via split into stacked vias. These cross-layer blind vias are hard to drill by laser. Copper deposition and plating on such deep blind vias are also difficult.<\\\/p>\\n<hr data-start=\\\"8844\\\" data-end=\\\"8847\\\" \\\/>\\n<h1 data-start=\\\"8849\\\" data-end=\\\"8898\\\">Stacked blind via design in double-laminate HDI<\\\/h1>\\n<p data-start=\\\"8899\\\" data-end=\\\"9278\\\">There is a type where buried vias at layers 2\\u20137 need stacked blind vias above them. This is still a (1+1+N+1+1) structure. Some double-laminate HDI boards use this method. The inner multi-layer has buried vias and needs two lamination steps. The key is that the stacked via design adds difficulty. But placing buried vias at layers 2\\u20137 reduces one lamination step and saves cost.<\\\/p>\\n<hr data-start=\\\"9280\\\" data-end=\\\"9283\\\" \\\/>\\n<h1 data-start=\\\"9285\\\" data-end=\\\"9338\\\">Cross-layer blind via design in double-laminate HDI<\\\/h1>\\n<p data-start=\\\"9339\\\" data-end=\\\"9875\\\">Another double-laminate (1+1+N+1+1) design includes cross-layer blind vias. This design is harder to make and some HDI makers lack the skill. The inner multi-layer has buried vias in layers 3\\u20136 and needs three lamination steps. The main issue is the cross-layer blind via design. If you can split the 1\\u20133 cross-layer via into 1\\u20132 and 2\\u20133 blind vias, the cost drops and the process becomes simpler. Note: this split differs from the stacked-via split explained earlier. This split uses staggered blind vias instead of stacked blind vias.<\\\/p>\\n<hr data-start=\\\"9877\\\" data-end=\\\"9880\\\" \\\/>\\n<h1 data-start=\\\"9882\\\" data-end=\\\"9897\\\">Levels of HDI<\\\/h1>\\n<ul data-start=\\\"9898\\\" data-end=\\\"10118\\\">\\n<li data-start=\\\"9898\\\" data-end=\\\"9974\\\">\\n<p data-start=\\\"9900\\\" data-end=\\\"9974\\\">First-level (1st order) HDI is simple. The process and control are easier.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"9975\\\" data-end=\\\"10042\\\">\\n<p data-start=\\\"9977\\\" data-end=\\\"10042\\\">Second-level HDI is more complex in production and manufacturing.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"10043\\\" data-end=\\\"10118\\\">\\n<p data-start=\\\"10045\\\" data-end=\\\"10118\\\">Third-level and above follow the second-level rules but are more complex.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<hr data-start=\\\"10120\\\" data-end=\\\"10123\\\" \\\/>\\n<h1 data-start=\\\"10125\\\" data-end=\\\"10167\\\">Differences between HDI and regular PCBs<\\\/h1>\\n<p data-start=\\\"10168\\\" data-end=\\\"10482\\\">HDI boards are often made by lamination techniques using thin core materials. The more laminations, the higher the process level. Most HDI boards use one lamination. High-level HDI uses two or more lamination techniques and adds advanced methods such as stacked vias, plated filled vias, and laser direct drilling.<\\\/p>\\n<p data-start=\\\"10484\\\" data-end=\\\"10746\\\">When the relative density of a PCB gets higher than an eight-layer board, making it by HDI often costs less than doing complex traditional lamination and pressing. HDI boards often have higher mechanical strength and better signal accuracy than traditional PCBs.<\\\/p>\\n<p data-start=\\\"10748\\\" data-end=\\\"10792\\\">Other improvements of HDI over regular PCBs:<\\\/p>\\n<ul data-start=\\\"10793\\\" data-end=\\\"10940\\\">\\n<li data-start=\\\"10793\\\" data-end=\\\"10843\\\">\\n<p data-start=\\\"10795\\\" data-end=\\\"10843\\\">Better performance for microwave and RF signals.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"10844\\\" data-end=\\\"10914\\\">\\n<p data-start=\\\"10846\\\" data-end=\\\"10914\\\">Better resistance to radio interference and electrostatic discharge.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"10915\\\" data-end=\\\"10940\\\">\\n<p data-start=\\\"10917\\\" data-end=\\\"10940\\\">Better heat conduction.<\\\/p>\\n<\\\/li>\\n<\\\/ul>\\n<p data-start=\\\"10942\\\" data-end=\\\"11053\\\">High-density integration (HDI) allows end products to be smaller and more standard in function and performance.<\\\/p>\\n<hr data-start=\\\"11055\\\" data-end=\\\"11058\\\" \\\/>\\n<h1 data-start=\\\"11060\\\" data-end=\\\"11100\\\">Simple advice for designers and buyers<\\\/h1>\\n<ol data-start=\\\"11101\\\" data-end=\\\"11930\\\">\\n<li data-start=\\\"11101\\\" data-end=\\\"11162\\\">\\n<p data-start=\\\"11104\\\" data-end=\\\"11162\\\">Use HDI when you need smaller size and better performance.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11163\\\" data-end=\\\"11245\\\">\\n<p data-start=\\\"11166\\\" data-end=\\\"11245\\\">Talk to your PCB supplier early. HDI needs design-for-manufacture (DFM) checks.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11246\\\" data-end=\\\"11315\\\">\\n<p data-start=\\\"11249\\\" data-end=\\\"11315\\\">Ask for IPC-based specs. Use IPC-2226 and IPC-6016 where possible.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11316\\\" data-end=\\\"11386\\\">\\n<p data-start=\\\"11319\\\" data-end=\\\"11386\\\">Plan stackups with enough ground planes to keep return paths short.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11387\\\" data-end=\\\"11476\\\">\\n<p data-start=\\\"11390\\\" data-end=\\\"11476\\\">Use microvia sizes that match your PCB house capability. Common: 3\\u20135 mil, often 4 mil.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11477\\\" data-end=\\\"11569\\\">\\n<p data-start=\\\"11480\\\" data-end=\\\"11569\\\">Try to avoid stacked vias unless necessary. Staggered blind\\\/buried vias are often easier.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11570\\\" data-end=\\\"11655\\\">\\n<p data-start=\\\"11573\\\" data-end=\\\"11655\\\">If you choose multi-step lamination HDI, expect more process steps and inspection.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11656\\\" data-end=\\\"11744\\\">\\n<p data-start=\\\"11659\\\" data-end=\\\"11744\\\">Use proper simulation for high-speed or RF designs to check EMI and signal integrity.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11745\\\" data-end=\\\"11832\\\">\\n<p data-start=\\\"11748\\\" data-end=\\\"11832\\\">For BGA fan-out, microvias and pad-in-pad help reduce fan-out area and trace length.<\\\/p>\\n<\\\/li>\\n<li data-start=\\\"11833\\\" data-end=\\\"11930\\\">\\n<p data-start=\\\"11837\\\" data-end=\\\"11930\\\">For cost control, reduce the number of lamination steps when you can. Optimize via placement.<\\\/p>\\n<\\\/li>\\n<\\\/ol>\\n<hr data-start=\\\"11932\\\" data-end=\\\"11935\\\" \\\/>\\n<h1 data-start=\\\"11937\\\" data-end=\\\"11954\\\">Closing summary<\\\/h1>\\n<p data-start=\\\"11955\\\" data-end=\\\"12546\\\">HDI boards are high density interconnect PCBs that use micro blind and buried vias. They let designers pack more traces and parts into less space. HDI routing calls for careful stackup planning, good ground planes, exact microvia use, and proper DFM checks. HDI gives clear benefits on size, signal speed, and performance. HDI appears in many fields, from medical and mobile to automotive and aerospace. The more complex the HDI level, the more advanced the process and the higher the cost. 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class=\\\"elementor-element elementor-element-c325e24 e-flex e-con-boxed e-con e-parent\\\" data-id=\\\"c325e24\\\" data-element_type=\\\"container\\\" data-e-type=\\\"container\\\">\\n\\t\\t\\t\\t\\t<div class=\\\"e-con-inner\\\">\\n\\t\\t[elementor-element k=\\\"0e46bd9387093ca73b9000e38f18cce4\\\" data=\\\"{"id":"2ce50fb","elType":"widget","settings":{"editor":"<h2 data-start=\"78\" data-end=\"101\">What is an HDI PCB<\/h2>\n<p data-start=\"102\" data-end=\"607\">An HDI board is a high density interconnect printed circuit board. It uses micro blind and buried vias. These boards have a high line density. They have inner layer traces and outer layer traces. They also use drilled holes and plated holes to link traces between layers. As electronic products get smaller and more precise, makers ask for denser PCBs. The best way to increase PCB density is to cut the number of through-holes and to add well-placed blind and buried vias. This need led to the HDI board.<\/p>\n<p data-start=\"102\" data-end=\"607\">\u00a0<\/p>\n<p data-start=\"102\" data-end=\"607\"><img class=\"size-full wp-image-2703 aligncenter\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb.webp\" alt=\"hdi pcb\" width=\"600\" height=\"450\" \/><\/p>\n<p data-start=\"102\" data-end=\"607\">\u00a0<\/p>\n<h2 data-start=\"609\" data-end=\"626\">IPC definition<\/h2>\n<p data-start=\"627\" data-end=\"681\"><a href=\"https:\/\/www.electronics.org\/TOC\/IPC-2226A.pdf?utm_source=chatgpt.com\">IPC-2226<\/a> gives a clear rule for blind and buried vias:<\/p>\n<ul data-start=\"682\" data-end=\"1035\">\n<li data-start=\"682\" data-end=\"734\">\n<p data-start=\"684\" data-end=\"734\">Via or buried via diameter \u2264 0.15 mm (0.00591 in).<\/p>\n<\/li>\n<li data-start=\"735\" data-end=\"781\">\n<p data-start=\"737\" data-end=\"781\">Annular ring diameter \u2264 0.35 mm (0.0138 in).<\/p>\n<\/li>\n<li data-start=\"782\" data-end=\"1035\">\n<p data-start=\"784\" data-end=\"1035\">These vias can be made by laser or mechanical drilling, or by dry\/wet etching, or by pattern transfer. Then a conductive plating covers the hole.<br \/>Note: If the hole diameter is &gt; 0.15 mm (0.00591 in), treat it as a through-hole under the same standard.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"1037\" data-end=\"1069\">Common drilling sizes for HDI<\/h2>\n<p data-start=\"1070\" data-end=\"1183\">Common via sizes for HDI are 3\u20135 mil. Designers most often use 4 mil as a middle value for design and production.<\/p>\n<h2 data-start=\"1185\" data-end=\"1221\">Common IPC standards used for HDI<\/h2>\n<p data-start=\"1222\" data-end=\"1265\">Typical IPC standards for HDI work include:<\/p>\n<ol data-start=\"1266\" data-end=\"1627\">\n<li data-start=\"1266\" data-end=\"1351\">\n<p data-start=\"1269\" data-end=\"1351\">IPC\/JPCA-2315 \u2014 Guide for high density interconnect structure and microvia design.<\/p>\n<\/li>\n<li data-start=\"1352\" data-end=\"1441\">\n<p data-start=\"1355\" data-end=\"1441\">IPC-2226 \u2014 Design standard for high density interconnect (HDI) printed circuit boards.<\/p>\n<\/li>\n<li data-start=\"1442\" data-end=\"1545\">\n<p data-start=\"1445\" data-end=\"1545\">IPC\/JPCA-4104 \u2014 Specification for dielectric material validation and performance for HDI structures.<\/p>\n<\/li>\n<li data-start=\"1546\" data-end=\"1627\">\n<p data-start=\"1549\" data-end=\"1627\">IPC-6016 \u2014 Specification for qualification and performance for HDI structures.<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"1629\" data-end=\"1632\" \/>\n<h1 data-start=\"1634\" data-end=\"1668\">HDI routing: challenges and tips<\/h1>\n<h2 data-start=\"1670\" data-end=\"1695\">What HDI routing means<\/h2>\n<p data-start=\"1696\" data-end=\"2034\">HDI routing means using the latest design ideas and manufacturing methods to make a denser layout without changing the circuit function. In short, HDI uses more routing layers, smaller traces, smaller vias, smaller pads, and thinner cores. This lets you fit complex and often high-speed circuits into spaces that were not possible before.<\/p>\n<p data-start=\"2036\" data-end=\"2381\">As the manufacturing methods get better, HDI routing appears in many designs. You will find HDI in motherboards, graphics cards, phones, and other devices with little space. If you do HDI right, you can shrink the board size and also cut EMI problems on the PCB. Lowering cost is a key goal for many companies. HDI routing helps reach that goal.<\/p>\n<h2 data-start=\"2383\" data-end=\"2411\">HDI routing and microvias<\/h2>\n<p data-start=\"2412\" data-end=\"2575\">HDI routing is more complex than normal multi-layer routing. You might know how to design 8-layer or 16-layer PCBs. Still, HDI introduces new ideas you must learn.<\/p>\n<p data-start=\"2577\" data-end=\"2941\">In a normal PCB, we view the whole board as one item with many layers. In HDI, designers must think of many ultra-thin layers stacked to form one board. The main driver for HDI routing is the via technology. Vias are no longer only the plated holes drilled through the finished stack. Traditional through-holes reduce the space available for routing on each layer.<\/p>\n<p data-start=\"2577\" data-end=\"2941\">\u00a0<\/p>\n<p data-start=\"2577\" data-end=\"2941\"><img class=\"size-full wp-image-2702 aligncenter\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/HDI-microvias.webp\" alt=\"\" width=\"600\" height=\"414\" \/><\/p>\n<p data-start=\"2577\" data-end=\"2941\">\u00a0<\/p>\n<h2 data-start=\"2943\" data-end=\"2982\">Traditional vias are not fit for HDI<\/h2>\n<p data-start=\"2983\" data-end=\"3410\">In HDI routing, microvias are the key. They let many dense layers connect together. To explain, microvias look like blind or buried vias but follow a different method. Traditional vias are drilled after the layers are stacked. Microvias are laser drilled on layers before stacking. Laser-drilled microvias allow the smallest hole sizes and pad sizes between layers. This helps with <a href=\"https:\/\/flj-pcb.com\/pcb-assembly\/bga-assmebly\/\">BGA<\/a> fan-out layouts where pins sit in a grid.<\/p>\n<h2 data-start=\"3412\" data-end=\"3437\">HDI routing strategies<\/h2>\n<p data-start=\"3438\" data-end=\"3697\">With microvias, PCB designers can route complex networks on many layers. This method is sometimes called \u201cany-layer HDI\u201d or \u201cper-layer interconnect.\u201d Because microvias save space, both outer layers can host dense parts while most routing sits on inner layers.<\/p>\n<h2 data-start=\"3699\" data-end=\"3739\">Low impedance ground planes are vital<\/h2>\n<p data-start=\"3740\" data-end=\"3971\">When parts and traces get denser in a multilayer board, the risk of EMI and magnetic coupling rises. For HDI design you must ensure the stack has the right structure. Provide enough ground planes to give low impedance return paths.<\/p>\n<p data-start=\"3973\" data-end=\"4223\">Place inner routing layers between ground or power layers to cut cross-coupling and crosstalk. Keep high-speed signal paths short and keep their return paths short too. Plan microvias so they limit signal paths to a small area. This reduces EMI risk.<\/p>\n<p data-start=\"4225\" data-end=\"4304\">For safety, use proper simulation tools to model the HDI PCB before production.<\/p>\n<hr data-start=\"4306\" data-end=\"4309\" \/>\n<h1 data-start=\"4311\" data-end=\"4338\">Main benefits of HDI PCBs<\/h1>\n<p data-start=\"4339\" data-end=\"4522\">Many people want to reduce product size. One of the best ways is to use HDI PCBs. When you need less weight and smaller size but keep function and reliability, HDI is a good solution.<\/p>\n<p data-start=\"4524\" data-end=\"4537\">Key benefits:<\/p>\n<ul data-start=\"4538\" data-end=\"4961\">\n<li data-start=\"4538\" data-end=\"4689\">\n<p data-start=\"4540\" data-end=\"4689\">HDI allows pad-in-pad and blind via use. This lets parts sit close and cuts trace length. Shorter traces often mean faster and more reliable signals.<\/p>\n<\/li>\n<li data-start=\"4690\" data-end=\"4825\">\n<p data-start=\"4692\" data-end=\"4825\">These boards can give good performance at a fair cost. HDI is an affordable choice for people who need reliable, durable electronics.<\/p>\n<\/li>\n<li data-start=\"4826\" data-end=\"4961\">\n<p data-start=\"4828\" data-end=\"4961\">To decide if HDI fits your project, learn more about them and how to use them. Know the differences between normal PCBs and HDI PCBs.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"4963\" data-end=\"4966\" \/>\n<h1 data-start=\"4968\" data-end=\"4999\">Where HDI PCBs are used today<\/h1>\n<p data-start=\"5000\" data-end=\"5058\">Because of their benefits, HDI PCBs appear in many fields.<\/p>\n<ol data-start=\"5060\" data-end=\"5687\">\n<li data-start=\"5060\" data-end=\"5305\">\n<p data-start=\"5063\" data-end=\"5305\">Medical devices \u2014 Many medical tools must be small. Lab gear and implants often need tiny boards. HDI helps here. A pacemaker is a good example. Many monitoring and probe tools, like endoscopes, use HDI too. In these cases, smaller is better.<\/p>\n<\/li>\n<li data-start=\"5307\" data-end=\"5431\">\n<p data-start=\"5310\" data-end=\"5431\">Automotive \u2014 Cars use space well. Some car electronics are getting smaller. HDI helps reduce size while keeping function.<\/p>\n<\/li>\n<li data-start=\"5433\" data-end=\"5537\">\n<p data-start=\"5436\" data-end=\"5537\">Mobile devices \u2014 Tablets and phones use HDI. This is why these devices become thinner as they evolve.<\/p>\n<\/li>\n<li data-start=\"5539\" data-end=\"5687\">\n<p data-start=\"5542\" data-end=\"5687\">Aerospace and defense \u2014 These fields use HDI for its reliability and small size. HDI shows up more as new designs need compact and stable boards.<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"5689\" data-end=\"5739\">Many other fields will use more HDI in the future.<\/p>\n<p data-start=\"5689\" data-end=\"5739\">\u00a0<\/p>\n<p data-start=\"5689\" data-end=\"5739\"><img class=\"size-full wp-image-2704 aligncenter\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Mobile-devices-use-HDI.webp\" alt=\"\" width=\"420\" height=\"280\" \/><\/p>\n<p data-start=\"5689\" data-end=\"5739\">\u00a0<\/p>\n<hr data-start=\"5741\" data-end=\"5744\" \/>\n<h1 data-start=\"5746\" data-end=\"5780\">What makes an HDI PCB an HDI PCB<\/h1>\n<p data-start=\"5781\" data-end=\"6033\">An HDI PCB uses blind via plating and then a second lamination step. These boards can be first level, second level, third level, and higher. Makers usually build HDI boards by lamination steps. The more lamination steps, the higher the technical level.<\/p>\n<ul data-start=\"6035\" data-end=\"6248\">\n<li data-start=\"6035\" data-end=\"6084\">\n<p data-start=\"6037\" data-end=\"6084\">Basic HDI boards often use one lamination step.<\/p>\n<\/li>\n<li data-start=\"6085\" data-end=\"6138\">\n<p data-start=\"6087\" data-end=\"6138\">Higher level HDI uses two or more lamination steps.<\/p>\n<\/li>\n<li data-start=\"6139\" data-end=\"6248\">\n<p data-start=\"6141\" data-end=\"6248\">High-level HDI may use stacked vias, plated filled vias, laser direct drilling, and other advanced methods.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6250\" data-end=\"6314\">Now we explain common layer stacks and how producers build them.<\/p>\n<hr data-start=\"6316\" data-end=\"6319\" \/>\n<h1 data-start=\"6321\" data-end=\"6359\">Simple single-laminate HDI (example)<\/h1>\n<p data-start=\"6360\" data-end=\"6700\">A simple single-laminate HDI board can be a 6-layer board with a 1+4+1 stack. This board is simple. The inner multi-layer board has no buried vias. One lamination completes the board. The manufacturing is similar to normal multilayer single-laminate boards. But after lamination you still need laser drilling for blind vias and other steps.<\/p>\n<hr data-start=\"6702\" data-end=\"6705\" \/>\n<h1 data-start=\"6707\" data-end=\"6749\">Normal single-laminate HDI (common case)<\/h1>\n<p data-start=\"6750\" data-end=\"7221\">A common single-laminate HDI has a structure (1 + N + 1) where N \u2265 2 and N is even. For example, a single-laminate 6-layer HDI uses 1+4+1. This structure is the mainstream design for single-laminate HDI. The inner multi-layer often has buried vias that require a second lamination step to finish. This single-laminate type often has blind vias and buried vias. If designers can change this type into the simple single-laminate form above, both buyer and supplier benefit.<\/p>\n<hr data-start=\"7223\" data-end=\"7226\" \/>\n<h1 data-start=\"7228\" data-end=\"7270\">Normal double-laminate HDI (common case)<\/h1>\n<p data-start=\"7271\" data-end=\"7697\">A common double-laminate HDI might be an 8-layer board with a 1+1+4+1+1 stack. This stack is (1+1+N+1+1) with N \u2265 2 and even. This is the mainstream double-laminate design in the PCB industry. The inner multi-layer has buried vias that need three lamination steps. This type often does not have staggered via stacks. If you can change buried vias from layers 3\u20136 to layers 2\u20137, you can reduce one lamination step and cut cost.<\/p>\n<hr data-start=\"7699\" data-end=\"7702\" \/>\n<h1 data-start=\"7704\" data-end=\"7740\">Another common double-laminate HDI<\/h1>\n<p data-start=\"7741\" data-end=\"8283\">This type also uses (1+1+N+1+1). Even though it is a double-laminate structure, the buried via sits in a different place \u2014 between layers 2 and 7. This change can reduce lamination steps from three to two. But this design has one hard point: it can create blind vias from layers 1\u20133. You must split those into two sets (1\u20132 and 2\u20133) and make the 2\u20133 inner blind vias with via filling. Via filling adds cost and difficulty. So during design, try to avoid stacked vias and change 1\u20133 blind vias into staggered 1\u20132 and 2\u20133 blind and buried vias.<\/p>\n<hr data-start=\"8285\" data-end=\"8288\" \/>\n<h1 data-start=\"8290\" data-end=\"8348\">Uncommon double-laminate HDI with cross-layer blind vias<\/h1>\n<p data-start=\"8349\" data-end=\"8842\">One uncommon double-laminate HDI 6-layer board uses 1+1+2+1+1. It still uses the (1+1+N+1+1) idea with N \u2265 2 and even. This design has cross-layer blind vias. The blind via depth grows \u2014 a 1\u20133 depth blind via is twice the depth of a normal 1\u20132 blind via. Customers who choose this design have specific needs and do not want the blind via split into stacked vias. These cross-layer blind vias are hard to drill by laser. Copper deposition and plating on such deep blind vias are also difficult.<\/p>\n<hr data-start=\"8844\" data-end=\"8847\" \/>\n<h1 data-start=\"8849\" data-end=\"8898\">Stacked blind via design in double-laminate HDI<\/h1>\n<p data-start=\"8899\" data-end=\"9278\">There is a type where buried vias at layers 2\u20137 need stacked blind vias above them. This is still a (1+1+N+1+1) structure. Some double-laminate HDI boards use this method. The inner multi-layer has buried vias and needs two lamination steps. The key is that the stacked via design adds difficulty. But placing buried vias at layers 2\u20137 reduces one lamination step and saves cost.<\/p>\n<hr data-start=\"9280\" data-end=\"9283\" \/>\n<h1 data-start=\"9285\" data-end=\"9338\">Cross-layer blind via design in double-laminate HDI<\/h1>\n<p data-start=\"9339\" data-end=\"9875\">Another double-laminate (1+1+N+1+1) design includes cross-layer blind vias. This design is harder to make and some HDI makers lack the skill. The inner multi-layer has buried vias in layers 3\u20136 and needs three lamination steps. The main issue is the cross-layer blind via design. If you can split the 1\u20133 cross-layer via into 1\u20132 and 2\u20133 blind vias, the cost drops and the process becomes simpler. Note: this split differs from the stacked-via split explained earlier. This split uses staggered blind vias instead of stacked blind vias.<\/p>\n<hr data-start=\"9877\" data-end=\"9880\" \/>\n<h1 data-start=\"9882\" data-end=\"9897\">Levels of HDI<\/h1>\n<ul data-start=\"9898\" data-end=\"10118\">\n<li data-start=\"9898\" data-end=\"9974\">\n<p data-start=\"9900\" data-end=\"9974\">First-level (1st order) HDI is simple. The process and control are easier.<\/p>\n<\/li>\n<li data-start=\"9975\" data-end=\"10042\">\n<p data-start=\"9977\" data-end=\"10042\">Second-level HDI is more complex in production and manufacturing.<\/p>\n<\/li>\n<li data-start=\"10043\" data-end=\"10118\">\n<p data-start=\"10045\" data-end=\"10118\">Third-level and above follow the second-level rules but are more complex.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"10120\" data-end=\"10123\" \/>\n<h1 data-start=\"10125\" data-end=\"10167\">Differences between HDI and regular PCBs<\/h1>\n<p data-start=\"10168\" data-end=\"10482\">HDI boards are often made by lamination techniques using thin core materials. The more laminations, the higher the process level. Most HDI boards use one lamination. High-level HDI uses two or more lamination techniques and adds advanced methods such as stacked vias, plated filled vias, and laser direct drilling.<\/p>\n<p data-start=\"10484\" data-end=\"10746\">When the relative density of a PCB gets higher than an eight-layer board, making it by HDI often costs less than doing complex traditional lamination and pressing. HDI boards often have higher mechanical strength and better signal accuracy than traditional PCBs.<\/p>\n<p data-start=\"10748\" data-end=\"10792\">Other improvements of HDI over regular PCBs:<\/p>\n<ul data-start=\"10793\" data-end=\"10940\">\n<li data-start=\"10793\" data-end=\"10843\">\n<p data-start=\"10795\" data-end=\"10843\">Better performance for microwave and RF signals.<\/p>\n<\/li>\n<li data-start=\"10844\" data-end=\"10914\">\n<p data-start=\"10846\" data-end=\"10914\">Better resistance to radio interference and electrostatic discharge.<\/p>\n<\/li>\n<li data-start=\"10915\" data-end=\"10940\">\n<p data-start=\"10917\" data-end=\"10940\">Better heat conduction.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10942\" data-end=\"11053\">High-density integration (HDI) allows end products to be smaller and more standard in function and performance.<\/p>\n<hr data-start=\"11055\" data-end=\"11058\" \/>\n<h1 data-start=\"11060\" data-end=\"11100\">Simple advice for designers and buyers<\/h1>\n<ol data-start=\"11101\" data-end=\"11930\">\n<li data-start=\"11101\" data-end=\"11162\">\n<p data-start=\"11104\" data-end=\"11162\">Use HDI when you need smaller size and better performance.<\/p>\n<\/li>\n<li data-start=\"11163\" data-end=\"11245\">\n<p data-start=\"11166\" data-end=\"11245\">Talk to your PCB supplier early. HDI needs design-for-manufacture (DFM) checks.<\/p>\n<\/li>\n<li data-start=\"11246\" data-end=\"11315\">\n<p data-start=\"11249\" data-end=\"11315\">Ask for IPC-based specs. Use IPC-2226 and IPC-6016 where possible.<\/p>\n<\/li>\n<li data-start=\"11316\" data-end=\"11386\">\n<p data-start=\"11319\" data-end=\"11386\">Plan stackups with enough ground planes to keep return paths short.<\/p>\n<\/li>\n<li data-start=\"11387\" data-end=\"11476\">\n<p data-start=\"11390\" data-end=\"11476\">Use microvia sizes that match your PCB house capability. Common: 3\u20135 mil, often 4 mil.<\/p>\n<\/li>\n<li data-start=\"11477\" data-end=\"11569\">\n<p data-start=\"11480\" data-end=\"11569\">Try to avoid stacked vias unless necessary. Staggered blind\/buried vias are often easier.<\/p>\n<\/li>\n<li data-start=\"11570\" data-end=\"11655\">\n<p data-start=\"11573\" data-end=\"11655\">If you choose multi-step lamination HDI, expect more process steps and inspection.<\/p>\n<\/li>\n<li data-start=\"11656\" data-end=\"11744\">\n<p data-start=\"11659\" data-end=\"11744\">Use proper simulation for high-speed or RF designs to check EMI and signal integrity.<\/p>\n<\/li>\n<li data-start=\"11745\" data-end=\"11832\">\n<p data-start=\"11748\" data-end=\"11832\">For BGA fan-out, microvias and pad-in-pad help reduce fan-out area and trace length.<\/p>\n<\/li>\n<li data-start=\"11833\" data-end=\"11930\">\n<p data-start=\"11837\" data-end=\"11930\">For cost control, reduce the number of lamination steps when you can. Optimize via placement.<\/p>\n<\/li>\n<\/ol>\n<hr data-start=\"11932\" data-end=\"11935\" \/>\n<h1 data-start=\"11937\" data-end=\"11954\">Closing summary<\/h1>\n<p data-start=\"11955\" data-end=\"12546\">HDI boards are high density interconnect PCBs that use micro blind and buried vias. They let designers pack more traces and parts into less space. HDI routing calls for careful stackup planning, good ground planes, exact microvia use, and proper DFM checks. HDI gives clear benefits on size, signal speed, and performance. HDI appears in many fields, from medical and mobile to automotive and aerospace. The more complex the HDI level, the more advanced the process and the higher the cost. Good design and early supplier communication will help you get the right HDI board for your product.<\/p>","display_condition_list":[{"display_condition_login_status":"subscriber","_id":"83b8d93"}]},"elements":[],"widgetType":"text-editor"}\\\"]\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<section class=\\\"elementor-section elementor-top-section elementor-element elementor-element-s1ztwe2 elementor-section-content-top elementor-section-boxed elementor-section-height-default elementor-section-height-default\\\" data-id=\\\"s1ztwe2\\\" data-element_type=\\\"section\\\" data-e-type=\\\"section\\\" data-settings=\\\"{&quot;background_background&quot;:&quot;classic&quot;}\\\">\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-background-overlay\\\"><\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-container elementor-column-gap-no\\\">\\n\\t\\t\\t\\t\\t<div class=\\\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7882748\\\" data-id=\\\"7882748\\\" data-element_type=\\\"column\\\" data-e-type=\\\"column\\\">\\n\\t\\t\\t<div class=\\\"elementor-widget-wrap elementor-element-populated\\\">\\n\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-element elementor-element-9fc6712 elementor-widget elementor-widget-heading\\\" data-id=\\\"9fc6712\\\" data-element_type=\\\"widget\\\" data-e-type=\\\"widget\\\" data-widget_type=\\\"heading.default\\\">\\n\\t\\t\\t\\t<div class=\\\"elementor-widget-container\\\">\\n\\t\\t\\t\\t\\t<h2 class=\\\"elementor-heading-title elementor-size-default\\\">Frequently Asked Questions<\\\/h2>\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<div class=\\\"elementor-element elementor-element-631b990 elementor-widget elementor-widget-accordion\\\" data-id=\\\"631b990\\\" data-element_type=\\\"widget\\\" data-e-type=\\\"widget\\\" data-widget_type=\\\"accordion.default\\\">\\n\\t\\t\\t\\t<div class=\\\"elementor-widget-container\\\">\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-accordion\\\">\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-accordion-item\\\">\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-title-1031\\\" class=\\\"elementor-tab-title\\\" data-tab=\\\"1\\\" role=\\\"button\\\" aria-controls=\\\"elementor-tab-content-1031\\\" aria-expanded=\\\"false\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon elementor-accordion-icon-right\\\" aria-hidden=\\\"true\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-closed\\\"><svg class=\\\"e-font-icon-svg e-fas-plus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-opened\\\"><svg class=\\\"e-font-icon-svg e-fas-minus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<a class=\\\"elementor-accordion-title\\\" tabindex=\\\"0\\\">What are microvias, blind vias and buried vias?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-content-1031\\\" class=\\\"elementor-tab-content elementor-clearfix\\\" data-tab=\\\"1\\\" role=\\\"region\\\" aria-labelledby=\\\"elementor-tab-title-1031\\\"><p>Microvias are very small vias (often laser-drilled) that connect only adjacent layers. Blind vias connect outer layers to inner layers; buried vias only connect inner layers. These via types save board space and improve routing.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-accordion-item\\\">\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-title-1032\\\" class=\\\"elementor-tab-title\\\" data-tab=\\\"2\\\" role=\\\"button\\\" aria-controls=\\\"elementor-tab-content-1032\\\" aria-expanded=\\\"false\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon elementor-accordion-icon-right\\\" aria-hidden=\\\"true\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-closed\\\"><svg class=\\\"e-font-icon-svg e-fas-plus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-opened\\\"><svg class=\\\"e-font-icon-svg e-fas-minus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<a class=\\\"elementor-accordion-title\\\" tabindex=\\\"0\\\">What are the main advantages of HDI PCBs?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-content-1032\\\" class=\\\"elementor-tab-content elementor-clearfix\\\" data-tab=\\\"2\\\" role=\\\"region\\\" aria-labelledby=\\\"elementor-tab-title-1032\\\"><p>Key benefits: higher component density, shorter signal paths (better signal integrity), smaller and lighter products, and improved routing for fine-pitch BGAs and high-speed circuits.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-accordion-item\\\">\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-title-1033\\\" class=\\\"elementor-tab-title\\\" data-tab=\\\"3\\\" role=\\\"button\\\" aria-controls=\\\"elementor-tab-content-1033\\\" aria-expanded=\\\"false\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon elementor-accordion-icon-right\\\" aria-hidden=\\\"true\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-closed\\\"><svg class=\\\"e-font-icon-svg e-fas-plus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-opened\\\"><svg class=\\\"e-font-icon-svg e-fas-minus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<a class=\\\"elementor-accordion-title\\\" tabindex=\\\"0\\\">Accordion Title<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-content-1033\\\" class=\\\"elementor-tab-content elementor-clearfix\\\" data-tab=\\\"3\\\" role=\\\"region\\\" aria-labelledby=\\\"elementor-tab-title-1033\\\"><p>Common applications: smartphones and mobile devices, 5G and network equipment, medical devices, aerospace, automotive electronics, and compact consumer products.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-accordion-item\\\">\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-title-1034\\\" class=\\\"elementor-tab-title\\\" data-tab=\\\"4\\\" role=\\\"button\\\" aria-controls=\\\"elementor-tab-content-1034\\\" aria-expanded=\\\"false\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon elementor-accordion-icon-right\\\" aria-hidden=\\\"true\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-closed\\\"><svg class=\\\"e-font-icon-svg e-fas-plus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-opened\\\"><svg class=\\\"e-font-icon-svg e-fas-minus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<a class=\\\"elementor-accordion-title\\\" tabindex=\\\"0\\\">What design rules are special for HDI?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-content-1034\\\" class=\\\"elementor-tab-content elementor-clearfix\\\" data-tab=\\\"4\\\" role=\\\"region\\\" aria-labelledby=\\\"elementor-tab-title-1034\\\"><p>Important rules: limit microvia diameter and spacing, control dielectric thickness and impedance, plan BGA escape routes (dogbone fanouts), and avoid via-in-pad unless properly filled\\\/planarized. Follow DFM and your fabricator\\u2019s capability matrix.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t<div class=\\\"elementor-accordion-item\\\">\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-title-1035\\\" class=\\\"elementor-tab-title\\\" data-tab=\\\"5\\\" role=\\\"button\\\" aria-controls=\\\"elementor-tab-content-1035\\\" aria-expanded=\\\"false\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon elementor-accordion-icon-right\\\" aria-hidden=\\\"true\\\">\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-closed\\\"><svg class=\\\"e-font-icon-svg e-fas-plus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zm144 276c0 6.6-5.4 12-12 12h-92v92c0 6.6-5.4 12-12 12h-56c-6.6 0-12-5.4-12-12v-92h-92c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h92v-92c0-6.6 5.4-12 12-12h56c6.6 0 12 5.4 12 12v92h92c6.6 0 12 5.4 12 12v56z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<span class=\\\"elementor-accordion-icon-opened\\\"><svg class=\\\"e-font-icon-svg e-fas-minus-circle\\\" viewBox=\\\"0 0 512 512\\\" xmlns=\\\"http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\\"><path d=\\\"M256 8C119 8 8 119 8 256s111 248 248 248 248-111 248-248S393 8 256 8zM124 296c-6.6 0-12-5.4-12-12v-56c0-6.6 5.4-12 12-12h264c6.6 0 12 5.4 12 12v56c0 6.6-5.4 12-12 12H124z\\\"><\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<a class=\\\"elementor-accordion-title\\\" tabindex=\\\"0\\\">Accordion Title<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<div id=\\\"elementor-tab-content-1035\\\" class=\\\"elementor-tab-content elementor-clearfix\\\" data-tab=\\\"5\\\" role=\\\"region\\\" aria-labelledby=\\\"elementor-tab-title-1035\\\">Haitarin sis\\u00e4lt\\u00f6<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t<\\\/section>\\n\\t\\t\",\"scripts\":[],\"styles\":[]}}"]},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Philifast","author_link":"https:\/\/flj-pcb.com\/vi\/author\/2475017442jygmail-com\/"},"uagb_comment_info":0,"uagb_excerpt":"What is an HDI PCB An HDI board is a high density interconnect printed circuit board. It uses micro blind [&hellip;]","_links":{"self":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/1915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/comments?post=1915"}],"version-history":[{"count":15,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/1915\/revisions"}],"predecessor-version":[{"id":3330,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/1915\/revisions\/3330"}],"up":[{"embeddable":true,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/1898"}],"wp:attachment":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/media?parent=1915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}