{"id":4647,"date":"2026-01-20T06:03:03","date_gmt":"2026-01-20T06:03:03","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4647"},"modified":"2026-01-20T06:17:12","modified_gmt":"2026-01-20T06:17:12","slug":"hdi-pcb-design-essential-optimization-guide","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/cs\/hdi-pcb-design-essential-optimization-guide\/","title":{"rendered":"HDI PCB Design: Z\u00e1kladn\u00ed pr\u016fvodce optimalizac\u00ed"},"content":{"rendered":"<p>Navrhov\u00e1n\u00ed <a href=\"https:\/\/flj-pcb.com\/cs\/pcb-manufacturer\/hdi-pcb\/\" data-type=\"page\" data-id=\"1915\">DPS s vysokou hustotou propojen\u00ed (HDI)<\/a> vy\u017eaduje hlubokou znalost elektrick\u00fdch pot\u0159eb i v\u00fdrobn\u00edch limit\u016f. Technologie HDI umo\u017e\u0148uje pou\u017e\u00edt v\u00edce komponent na men\u0161\u00edm prostoru. To z n\u00ed \u010din\u00ed nejlep\u0161\u00ed volbu pro modern\u00ed elektroniku, jako jsou chytr\u00e9 telefony a nositeln\u00e1 technika.<\/p>\n\n\n\n<p>N\u00ed\u017ee je uveden podrobn\u00fd n\u00e1vod, jak\u00e9 faktory je t\u0159eba vz\u00edt v \u00favahu a jak optimalizovat n\u00e1vrhy HDI.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Faktory, kter\u00e9 je t\u0159eba zv\u00e1\u017eit p\u0159i n\u00e1vrhu HDI PCB<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Inteligentn\u00ed v\u00fdb\u011br komponent<\/h3>\n\n\n\n<p>P\u0159i n\u00e1vrhu desky HDI se obvykle pracuje s velmi mal\u00fdmi sou\u010d\u00e1stkami. Pat\u0159\u00ed sem za\u0159\u00edzen\u00ed pro povrchovou mont\u00e1\u017e (SMD) a pole s kuli\u010dkovou m\u0159\u00ed\u017ekou (BGA) s rozte\u010d\u00ed $0,65\\text{ mm}$ nebo men\u0161\u00ed.<\/p>\n\n\n\n<p>Komponenty je t\u0159eba vyb\u00edrat pe\u010dliv\u011b. Nejd\u016fle\u017eit\u011bj\u0161\u00edm faktorem je vzd\u00e1lenost mezi v\u00fdvody (rozte\u010d). Pokud jsou v\u00fdvody velmi bl\u00edzko u sebe, budete m\u00edt m\u00e9n\u011b prostoru pro veden\u00ed m\u011bd\u011bn\u00fdch stop. Tato volba v\u00e1m tak\u00e9 napov\u00ed, jakou \u0161\u00ed\u0159ku stopy pot\u0159ebujete a jak\u00fd typ pr\u016fchodky (otvoru) mus\u00edte pou\u017e\u00edt. Pokud zvol\u00edte BGA s velmi malou rozte\u010d\u00ed, budete mo\u017en\u00e1 nuceni pou\u017e\u00edt v\u00edce vrstev nebo men\u0161\u00ed mikrod\u00edry, abyste propojili v\u0161echny sign\u00e1ly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Pou\u017e\u00edv\u00e1n\u00ed mikrovi\u00ed<\/h3>\n\n\n\n<p>Srdcem konstrukce HDI jsou mikrotrubi\u010dky. Jedn\u00e1 se o velmi mal\u00e9 otvory, obvykle o pr\u016fm\u011bru men\u0161\u00edm ne\u017e $0,15\\text{ mm}$. Konstrukt\u00e9\u0159i k vytvo\u0159en\u00ed t\u011bchto otvor\u016f \u010dasto pou\u017e\u00edvaj\u00ed techniky \u201cbuild-up\u201d nebo \u201csekven\u010dn\u00edho\u201d laminov\u00e1n\u00ed.<\/p>\n\n\n\n<p>Mikrov\u00ed\u010dka v\u00e1m pomohou u\u0161et\u0159it spoustu m\u00edsta. Proto\u017ee jsou tak mal\u00e9, vejde se jich na malou plochu v\u00edce ne\u017e klasick\u00fdch pr\u016fchoz\u00edch otvor\u016f. Dal\u0161\u00ed velkou v\u00fdhodou je jejich n\u00edzk\u00e1 induk\u010dnost. D\u00edky tomu jsou ide\u00e1ln\u00ed pro vysokorychlostn\u00ed obvody. M\u016f\u017eete je pou\u017e\u00edt k p\u0159ipojen\u00ed v\u00fdkonov\u00fdch rovin k odd\u011blovac\u00edm kondenz\u00e1tor\u016fm nebo na jak\u00e9mkoli m\u00edst\u011b, kde pot\u0159ebujete sn\u00ed\u017eit elektrick\u00fd \u0161um.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. V\u00fdb\u011br materi\u00e1lu<\/h3>\n\n\n\n<p>V\u00fdb\u011br spr\u00e1vn\u00e9ho materi\u00e1lu je d\u016fle\u017eit\u00fd pro ka\u017edou desku plo\u0161n\u00fdch spoj\u016f, ale pro HDI je je\u0161t\u011b d\u016fle\u017eit\u011bj\u0161\u00ed. Va\u0161\u00edm c\u00edlem je naj\u00edt materi\u00e1l, kter\u00fd se snadno vyr\u00e1b\u00ed, ale z\u00e1rove\u0148 dob\u0159e zvl\u00e1d\u00e1 teplo a elekt\u0159inu.<\/p>\n\n\n\n<p>Kl\u00ed\u010dov\u00fdm faktorem je fyzick\u00e1 tlou\u0161\u0165ka materi\u00e1lu. Je t\u0159eba se pod\u00edvat na \u201cpom\u011br stran\u201d mikrotrhlin. Jedn\u00e1 se o pom\u011br mezi hloubkou otvoru a jeho pr\u016fm\u011brem. Pokud je materi\u00e1l p\u0159\u00edli\u0161 tlust\u00fd a otvor p\u0159\u00edli\u0161 mal\u00fd, je velmi obt\u00ed\u017en\u00e9 otvor \u0159\u00e1dn\u011b pokovit m\u011bd\u00ed. Mus\u00edte zvolit materi\u00e1l, kter\u00fd umo\u017e\u0148uje chemik\u00e1li\u00edm b\u011bhem procesu pokovov\u00e1n\u00ed prot\u00e9kat otvory.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. P\u0159es uz\u00e1v\u011br a offsetov\u00e9 mikroz\u00e1sobn\u00edky<\/h3>\n\n\n\n<p>P\u0159i n\u00e1vrhu HDI m\u016f\u017eete pou\u017e\u00edt techniku zvanou \u201cvia-in-pad\u201d. To znamen\u00e1, \u017ee um\u00edst\u00edte mikrovodi\u010d p\u0159\u00edmo do st\u0159edu podlo\u017eky pro povrchovou mont\u00e1\u017e.<\/p>\n\n\n\n<p>Za t\u00edmto \u00fa\u010delem je t\u0159eba pr\u016fchodku \u201cuzav\u0159\u00edt\u201d nebo vyplnit a n\u00e1sledn\u011b pokovit m\u011bd\u00ed. T\u00edm se vytvo\u0159\u00ed rovn\u00fd povrch pro p\u00e1jen\u00ed. P\u0159i pou\u017eit\u00ed t\u00e9to metody z\u00edsk\u00e1te mnohem v\u00edce prostoru pro veden\u00ed stop, proto\u017ee pr\u016fchodka nezab\u00edr\u00e1 dal\u0161\u00ed prostor mimo podlo\u017eku. M\u016f\u017eete tak\u00e9 pou\u017e\u00edt \u201codsazen\u00e9\u201d mikropropojky, kde otvory v r\u016fzn\u00fdch vrstv\u00e1ch nejsou dokonale zarovn\u00e1ny, abyste je\u0161t\u011b l\u00e9pe hospoda\u0159ili s prostorem.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"595\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/npth.webp\" alt=\"v\" class=\"wp-image-4650\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/npth.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/npth-300x223.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/npth-768x571.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/npth-16x12.webp 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">5. Redukovan\u00e9 plo\u0161n\u00e9 perforace<\/h3>\n\n\n\n<p>Kdy\u017e navrhnete nap\u00e1jec\u00ed a zemn\u00ed rovinu pod <a href=\"https:\/\/flj-pcb.com\/cs\/pcb-assembly\/bga-assmebly\/\" data-type=\"page\" data-id=\"1921\">BGA<\/a>, chcete m\u00edt co nejv\u00edce pevn\u00e9 m\u011bdi. Tomu se \u0159\u00edk\u00e1 \u201cPower Integrity\u201d (PI).<\/p>\n\n\n\n<p>V tradi\u010dn\u00edch konstrukc\u00edch vytv\u00e1\u0159ej\u00ed velk\u00e9 pr\u016fchoz\u00ed otvory v m\u011bd\u011bn\u00fdch rovin\u00e1ch mnoho \u201cdutin\u201d nebo pr\u00e1zdn\u00fdch m\u00edst. To p\u016fsob\u00ed jako plot, kter\u00fd blokuje tok proudu. V HDI jsou pr\u016fchodky mnohem men\u0161\u00ed, a tak z\u016fst\u00e1v\u00e1 v\u00edce m\u011bdi nedot\u010den\u00e9. T\u00edm se zlep\u0161uje elektromagnetick\u00e1 kompatibilita (EMC) desky. Poskytuje tak\u00e9 lep\u0161\u00ed st\u00edn\u011bn\u00ed proti ru\u0161en\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Probl\u00e9my se stohov\u00e1n\u00edm a delaminace<\/h3>\n\n\n\n<p>Uspo\u0159\u00e1d\u00e1n\u00ed m\u011bd\u011bn\u00fdch a izola\u010dn\u00edch vrstev je \u201cstack-up\u201d. V HDI se \u010dasto pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 materi\u00e1ly pro r\u016fzn\u00e9 vrstvy.<\/p>\n\n\n\n<p>Ka\u017ed\u00fd materi\u00e1l m\u00e1 \u201ckoeficient tepeln\u00e9 rozta\u017enosti\u201d (CTE). Ten ud\u00e1v\u00e1, jak moc se materi\u00e1l zv\u011bt\u0161\u00ed, kdy\u017e se zah\u0159eje. Pokud maj\u00ed dv\u011b vrstvy velmi rozd\u00edln\u00e9 hodnoty CTE, budou se rozp\u00ednat r\u016fznou rychlost\u00ed. To m\u016f\u017ee zp\u016fsobit, \u017ee se vrstvy od sebe odtrhnou, co\u017e se naz\u00fdv\u00e1 \u201cdelaminace\u201d. Aby se tomu p\u0159ede\u0161lo, m\u011bli by se konstrukt\u00e9\u0159i sna\u017eit pou\u017e\u00edt pro ka\u017edou vrstvu stejn\u00fd materi\u00e1l nebo pou\u017e\u00edt materi\u00e1ly s velmi podobn\u00fdmi hodnotami CTE a m\u00edrou absorpce vlhkosti.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"550\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/HDI-PCB-stack-up.webp\" alt=\"HDI PCB stack-up\" class=\"wp-image-4648\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/HDI-PCB-stack-up.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/HDI-PCB-stack-up-300x206.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/HDI-PCB-stack-up-768x528.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/HDI-PCB-stack-up-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">7. Zku\u0161ebn\u00ed metody<\/h3>\n\n\n\n<p>Tradi\u010dn\u00ed \u201ctestov\u00e1n\u00ed v obvodu\u201d (ICT) nen\u00ed u desek HDI \u010dasto mo\u017en\u00e9. ICT vy\u017eaduje velk\u00e9 testovac\u00ed body, kter\u00e9 zab\u00edraj\u00ed p\u0159\u00edli\u0161 mnoho m\u00edsta.<\/p>\n\n\n\n<p>M\u00edsto toho konstrukt\u00e9\u0159i pou\u017e\u00edvaj\u00ed funk\u010dn\u00ed testov\u00e1n\u00ed nebo metody JTAG (Joint Test Action Group). JTAG umo\u017e\u0148uje testovat spojen\u00ed mezi integrovan\u00fdmi obvody, ani\u017e by bylo nutn\u00e9 pou\u017e\u00edvat fyzick\u00e9 testovac\u00ed sondy pro ka\u017ed\u00fd jednotliv\u00fd vodi\u010d. Zat\u00edmco ICT je velmi dobr\u00e1 p\u0159i hled\u00e1n\u00ed konkr\u00e9tn\u00edch z\u00e1vad, JTAG je mnohem vhodn\u011bj\u0161\u00ed pro hust\u00e9 prost\u0159ed\u00ed desek HDI.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/JTAG-test.webp\" alt=\"JTAG test\" class=\"wp-image-4649\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/JTAG-test.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/JTAG-test-300x225.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/JTAG-test-768x576.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/JTAG-test-16x12.webp 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">8. \u0158\u00edzen\u00ed tepla<\/h3>\n\n\n\n<p>Desky HDI jsou velmi hust\u00e9, tak\u017ee se rychle zah\u0159\u00edvaj\u00ed. Mus\u00edte napl\u00e1novat, jak odv\u00e1d\u011bt teplo od komponent.<\/p>\n\n\n\n<p>M\u011bli byste se \u0159\u00eddit <a href=\"https:\/\/www.allpcb.com\/blog\/pcb-knowledge\/hdi-pcb-and-ipc-standards-ensuring-compliance-and-quality.html\" data-type=\"link\" data-id=\"https:\/\/www.allpcb.com\/blog\/pcb-knowledge\/hdi-pcb-and-ipc-standards-ensuring-compliance-and-quality.html\" target=\"_blank\" rel=\"noopener\">IPC-2226<\/a> kter\u00fd stanov\u00ed pravidla pro tepeln\u00fd n\u00e1vrh v oblasti HDI. Jednou z v\u00fdhod HDI je, \u017ee dielektrick\u00e9 (izola\u010dn\u00ed) vrstvy jsou velmi tenk\u00e9. Tenk\u00e9 vrstvy v kombinaci s mikrovrstvami skute\u010dn\u011b pom\u00e1haj\u00ed odv\u00e1d\u011bt teplo od \u010dip\u016f. Pokud m\u00e1te velmi horkou sou\u010d\u00e1stku, m\u016f\u017eete p\u0159idat \u201ctepeln\u00e9 pr\u016fchodky\u201d a odv\u00e9st teplo do v\u011bt\u0161\u00ed m\u011bd\u011bn\u00e9 roviny nebo chladi\u010de.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">9. Popt\u00e1vka po sm\u011brov\u00e1n\u00ed v z\u00e1vislosti na kapacit\u011b substr\u00e1tu<\/h3>\n\n\n\n<p>\u201cPot\u0159eba trasov\u00e1n\u00ed\u201d je celkov\u00e1 d\u00e9lka v\u0161ech vodi\u010d\u016f pot\u0159ebn\u00fdch k propojen\u00ed sou\u010d\u00e1stek na desce. \u201cKapacita substr\u00e1tu\u201d je celkov\u00e1 d\u00e9lka vodi\u010d\u016f, kterou deska skute\u010dn\u011b pojme.<\/p>\n\n\n\n<p>Aby byl n\u00e1vrh \u00fasp\u011b\u0161n\u00fd, mus\u00ed b\u00fdt kapacita vy\u0161\u0161\u00ed ne\u017e popt\u00e1vka. Pokud je popt\u00e1vka p\u0159\u00edli\u0161 vysok\u00e1, m\u016f\u017ee b\u00fdt nutn\u00e9 p\u0159idat v\u00edce vrstev, co\u017e v\u0161ak zvy\u0161uje n\u00e1klady. N\u00e1vrh\u00e1\u0159i se sna\u017e\u00ed tyto dv\u011b v\u011bci vyv\u00e1\u017eit, aby n\u00e1vrh dokon\u010dili s co nejni\u017e\u0161\u00edmi n\u00e1klady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">10. V\u00fdpo\u010det hustoty PWB<\/h3>\n\n\n\n<p>Slo\u017eitost va\u0161eho n\u00e1vrhu m\u016f\u017eete zm\u011b\u0159it pomoc\u00ed v\u00fdpo\u010dtu hustoty desek s plo\u0161n\u00fdmi spoji (PWB). Tu m\u011b\u0159\u00edme jako pr\u016fm\u011brnou d\u00e9lku stop na \u010dtvere\u010dn\u00ed palec.<\/p>\n\n\n\n<p>Abychom to zjistili, p\u0159edpokl\u00e1d\u00e1me, \u017ee ka\u017ed\u00e1 \u201cs\u00ed\u0165\u201d (jedno elektrick\u00e9 spojen\u00ed) m\u00e1 t\u0159i uzly a \u017ee ka\u017ed\u00fd p\u0159\u00edvod sou\u010d\u00e1stky je jeden uzel. Pou\u017eijeme n\u00e1sleduj\u00edc\u00ed vzorec:<\/p>\n\n\n\n<p>$$Wd = \\beta \\sqrt{Cd \\times Cc}$$<\/p>\n\n\n\n<p>Kde:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$Wd$<\/strong>: Hustota PWB (pr\u016fm\u011brn\u00e1 d\u00e9lka stopy na \u010dtvere\u010dn\u00ed palec).<\/li>\n\n\n\n<li><strong>$Cd$<\/strong>: Hustota slo\u017eky (pr\u016fm\u011brn\u00fd po\u010det d\u00edlk\u016f na \u010dtvere\u010dn\u00ed palec).<\/li>\n\n\n\n<li><strong>$Cc$<\/strong>: Slo\u017eitost sou\u010d\u00e1stky (pr\u016fm\u011brn\u00fd po\u010det vodi\u010d\u016f\/v\u00fdvod\u016f na sou\u010d\u00e1stku).<\/li>\n\n\n\n<li><strong>$\\beta$<\/strong>: Konstanta podle typu obvodu.\n<ul class=\"wp-block-list\">\n<li>Pou\u017eijte <strong>2.5<\/strong> pro vysoce analogov\u00e9 nebo diskr\u00e9tn\u00ed oblasti.<\/li>\n\n\n\n<li>Pou\u017eijte <strong>3.0<\/strong> pro sm\u00ed\u0161en\u00e9 analogov\u00e9 a digit\u00e1ln\u00ed oblasti.<\/li>\n\n\n\n<li>Pou\u017eijte <strong>3.5<\/strong> pro \u010dist\u011b digit\u00e1ln\u00ed nebo ASIC oblasti.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Tento vzorec je u\u017eite\u010dn\u00fdm vod\u00edtkem. Nezapome\u0148te v\u0161ak, \u017ee ka\u017ed\u00fd design je jedine\u010dn\u00fd a neexistuje jedin\u00e9 pravidlo, kter\u00e9 by se hodilo pro ka\u017edou desku.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Jak optimalizovat n\u00e1vrh HDI pro elektroniku<\/h2>\n\n\n\n<p>HDI je nejrychleji rostouc\u00ed \u010d\u00e1st\u00ed odv\u011btv\u00ed v\u00fdroby desek plo\u0161n\u00fdch spoj\u016f. D\u00edky n\u011bmu jsou desky efektivn\u011bj\u0161\u00ed a umo\u017e\u0148uj\u00ed vy\u0161\u0161\u00ed rychlost sign\u00e1lu. Ve srovn\u00e1n\u00ed se standardn\u00edmi deskami maj\u00ed desky HDI mnohem ten\u010d\u00ed linky, men\u0161\u00ed prostory a men\u0161\u00ed podlo\u017eky. Hlavn\u00ed rozd\u00edl je ve zp\u016fsobu propojen\u00ed vrstev. Standardn\u00ed desky pou\u017e\u00edvaj\u00ed otvory, kter\u00e9 proch\u00e1zej\u00ed skrz, ale HDI desky pou\u017e\u00edvaj\u00ed slep\u00e9 a zakopan\u00e9 pr\u016fchodky.<\/p>\n\n\n\n<p>Zde je n\u011bkolik zp\u016fsob\u016f, jak optimalizovat n\u00e1vrh a vyhnout se n\u00e1kladn\u00fdm chyb\u00e1m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00fdb\u011br spr\u00e1vn\u00e9ho typu cesty<\/h3>\n\n\n\n<p>Zvolen\u00e9 pr\u016fchodky ovlivn\u00ed v\u00fdkon a cenu desky. Pou\u017eit\u00ed mikropropust\u016f (slep\u00fdch nebo zakopan\u00fdch) m\u016f\u017ee ve skute\u010dnosti sn\u00ed\u017eit celkov\u00fd po\u010det pot\u0159ebn\u00fdch vrstev. Kdy\u017e m\u00e1te m\u00e9n\u011b vrstev, klesaj\u00ed n\u00e1klady na materi\u00e1l. D\u00edky tomu je tak\u00e9 v\u00fdrobn\u00ed proces m\u00e9n\u011b slo\u017eit\u00fd. M\u011bli byste se v\u010das poradit s v\u00fdrobcem, abyste zjistili, kter\u00e9 typy pr\u016fchodek dok\u00e1\u017ee spolehliv\u011b vyrobit.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"368\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PCB-thermal-vias.webp\" alt=\"PCB thermal vias\" class=\"wp-image-4651\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PCB-thermal-vias.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PCB-thermal-vias-300x138.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PCB-thermal-vias-768x353.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/01\/PCB-thermal-vias-18x8.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Pe\u010dliv\u00fd v\u00fdb\u011br komponent<\/h3>\n\n\n\n<p>P\u0159i sestavov\u00e1n\u00ed desky HDI mus\u00edte b\u00fdt velmi opatrn\u00ed p\u0159i v\u00fdb\u011bru sou\u010d\u00e1stek. Ne\u017e za\u010dnete s rozvr\u017een\u00edm, pod\u00edvejte se na po\u010det pin\u016f a velikost sou\u010d\u00e1stek. P\u0159em\u00fd\u0161lejte o tom, jak se stopy vejdou mezi v\u00fdvody. Pokud vyberete sou\u010d\u00e1stky, kter\u00e9 jsou pro velikost desky p\u0159\u00edli\u0161 slo\u017eit\u00e9, str\u00e1v\u00edte v\u00edce \u010dasu n\u00e1vrhem a v\u00edce pen\u011bz v\u00fdrobou.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pe\u010dliv\u00e9 pl\u00e1nov\u00e1n\u00ed skl\u00e1dky<\/h3>\n\n\n\n<p>Vrstvy na desce HDI lze uspo\u0159\u00e1dat mnoha zp\u016fsoby. Mezi b\u011b\u017en\u00e9 styly pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1-HDI:<\/strong> Jedna vrstva mikropropust\u016f na horn\u00ed a spodn\u00ed stran\u011b s j\u00e1drem obsahuj\u00edc\u00edm poh\u0159ben\u00e9 pr\u016fchodky.<\/li>\n\n\n\n<li><strong>2-HDI (bez stohov\u00e1n\u00ed):<\/strong> Dv\u011b vrstvy mikrovl\u00e1ken, kter\u00e9 na sebe nedol\u00e9haj\u00ed.<\/li>\n\n\n\n<li><strong>Stohovan\u00e9 2-HDI:<\/strong> Mikroskopick\u00e9 rostliny, kter\u00e9 sed\u00ed p\u0159\u00edmo na sob\u011b. Mohou b\u00fdt vypln\u011bny prysky\u0159ic\u00ed nebo m\u011bd\u00ed.<\/li>\n<\/ul>\n\n\n\n<p>Mus\u00edte si vybrat vyv\u00e1\u017een\u00fd stack-up. Pokud by sestava nebyla symetrick\u00e1, mohla by se deska b\u011bhem zah\u0159\u00edv\u00e1n\u00ed deformovat nebo oh\u00fdbat. Dobr\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed zlep\u0161uje \u201cv\u00fdt\u011b\u017enost\u201d (procento vyroben\u00fdch dobr\u00fdch desek).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Pou\u017e\u00edvejte spr\u00e1vn\u00e9 rozestupy<\/h3>\n\n\n\n<p>Pokud um\u00edst\u00edte komponenty p\u0159\u00edli\u0161 bl\u00edzko sebe, m\u016f\u017ee doj\u00edt k elektromagnetick\u00e9mu ru\u0161en\u00ed (EMI). K tomu doch\u00e1z\u00ed, kdy\u017e elektrick\u00e9 sign\u00e1ly z jednoho vodi\u010de pronikaj\u00ed do jin\u00e9ho vodi\u010de. M\u016f\u017ee tak\u00e9 vzniknout \u201cparazitn\u00ed kapacita\u201d, kter\u00e1 zpomaluje sign\u00e1ly.<\/p>\n\n\n\n<p>Sou\u010d\u00e1sti byste m\u011bli rozm\u00edstit tak, abyste minimalizovali nam\u00e1h\u00e1n\u00ed a elektromagnetick\u00e9 ru\u0161en\u00ed. Sou\u010dasn\u011b se ujist\u011bte, \u017ee m\u00e1te dostatek prostoru pro mont\u00e1\u017e a opravy. Pokud jsou sou\u010d\u00e1stky p\u0159\u00edli\u0161 bl\u00edzko u sebe, je velmi obt\u00ed\u017en\u00e9 je p\u0159ip\u00e1jet nebo opravit, pokud se n\u011bco pokaz\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Zam\u011b\u0159en\u00ed na integritu sign\u00e1lu (SI)<\/h3>\n\n\n\n<p>Integrita sign\u00e1lu spo\u010d\u00edv\u00e1 v zaji\u0161t\u011bn\u00ed \u010distoty elektrick\u00e9ho sign\u00e1lu od jednoho konce vodi\u010de k druh\u00e9mu. Abyste udr\u017eeli siln\u00e9 sign\u00e1ly:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Udr\u017eujte spr\u00e1vn\u00fd pom\u011br stran pr\u016fchodek, aby bylo m\u011bd\u011bn\u00e9 pokoven\u00ed siln\u00e9 a rovnom\u011brn\u00e9.<\/li>\n\n\n\n<li>Pro zkr\u00e1cen\u00ed d\u00e9lky \u201cpah\u00fdlu\u201d (p\u0159ebyte\u010dn\u00e9 m\u011bdi, kter\u00e1 vis\u00ed ze stopy) pou\u017eijte velmi mal\u00e9 mikro\u010d\u00e1stice.<\/li>\n\n\n\n<li>Um\u00edst\u011bte mal\u00e9 d\u00edly bl\u00edzko sebe, aby byly sign\u00e1ln\u00ed cesty kr\u00e1tk\u00e9.<\/li>\n\n\n\n<li>Rozlo\u017een\u00ed zakopan\u00fdch a zaslepen\u00fdch pr\u016fchodek pro sn\u00ed\u017een\u00ed fyzick\u00e9ho nam\u00e1h\u00e1n\u00ed materi\u00e1l\u016f desky.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Pou\u017eit\u00ed pokro\u010dil\u00fdch n\u00e1stroj\u016f pro navrhov\u00e1n\u00ed<\/h3>\n\n\n\n<p>N\u00e1vrh desky plo\u0161n\u00fdch spoj\u016f HDI je pro z\u00e1kladn\u00ed software p\u0159\u00edli\u0161 n\u00e1ro\u010dn\u00fd. V\u00fdrobci a konstrukt\u00e9\u0159i pot\u0159ebuj\u00ed profesion\u00e1ln\u00ed software CAD (Computer-Aided Design) a CAM (Computer-Aided Manufacturing). Pou\u017e\u00edvaj\u00ed tak\u00e9 technologii \u201cLaser Direct Imaging\u201d (LDI) pro kreslen\u00ed drobn\u00fdch \u010dar na desce. Proto\u017ee jsou tolerance tak mal\u00e9, jsou zku\u0161enosti obsluhy stejn\u011b d\u016fle\u017eit\u00e9 jako stroje.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00fdhody nap\u0159\u00ed\u010d odv\u011btv\u00edmi<\/h3>\n\n\n\n<p>Desky HDI se pou\u017e\u00edvaj\u00ed, proto\u017ee d\u00edky nim elektronika funguje l\u00e9pe. Najdete je v:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Po\u010d\u00edta\u010de:<\/strong> Pro rychlej\u0161\u00ed zpracov\u00e1n\u00ed dat.<\/li>\n\n\n\n<li><strong>Chytr\u00e9 telefony:<\/strong> Vm\u011bstnat v\u00edce funkc\u00ed do za\u0159\u00edzen\u00ed kapesn\u00ed velikosti.<\/li>\n\n\n\n<li><strong>Zdravotnick\u00e9 prost\u0159edky:<\/strong> Zmen\u0161it vybaven\u00ed pro l\u00e9ka\u0159e a zv\u00fd\u0161it jeho p\u0159enosnost.<\/li>\n<\/ul>\n\n\n\n<p>\u00dasp\u011bch va\u0161eho projektu HDI z\u00e1vis\u00ed na tom, jak dob\u0159e napl\u00e1nujete rozlo\u017een\u00ed a jak dob\u0159e budete spolupracovat s v\u00fdrobcem. Dodr\u017eov\u00e1n\u00edm t\u011bchto tip\u016f m\u016f\u017eete vytvo\u0159it vysoce v\u00fdkonnou desku, kter\u00e1 bude spolehliv\u00e1 a cenov\u011b v\u00fdhodn\u00e1.<\/p>","protected":false},"excerpt":{"rendered":"<p>Designing a High-Density Interconnect (HDI) PCB requires a deep understanding of both electrical needs and manufacturing limits. HDI technology allows [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2704,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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