{"id":4805,"date":"2026-03-12T09:17:05","date_gmt":"2026-03-12T09:17:05","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4805"},"modified":"2026-03-12T09:33:13","modified_gmt":"2026-03-12T09:33:13","slug":"pcb-blind-and-buried-via-manufacturing-process-guide","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/cs\/pcb-blind-and-buried-via-manufacturing-process-guide\/","title":{"rendered":"Pr\u016fvodce v\u00fdrobn\u00edm procesem zaslepen\u00fdch a zasypan\u00fdch pr\u016fchodek na desk\u00e1ch plo\u0161n\u00fdch spoj\u016f"},"content":{"rendered":"<h2 class=\"wp-block-heading\">1. P\u0159ehled<\/h2>\n\n\n\n<p>Slep\u00e9 pr\u016fchodky a zakopan\u00e9 pr\u016fchodky se pou\u017e\u00edvaj\u00ed hlavn\u011b pro desky s vysokou hustotou a pro desky s velmi mal\u00fdmi otvory. C\u00edlem je u\u0161et\u0159it m\u00edsto pro sm\u011brov\u00e1n\u00ed a zmen\u0161it tak plo\u0161n\u00fd spoj. B\u011b\u017en\u00fdm p\u0159\u00edkladem jsou desky plo\u0161n\u00fdch spoj\u016f mobiln\u00edch telefon\u016f.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Klasifikace<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">A) Laserov\u00e9 vrt\u00e1n\u00ed<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. D\u016fvody pro pou\u017eit\u00ed laserov\u00e9ho vrt\u00e1n\u00ed<\/h4>\n\n\n\n<p>a. Z\u00e1kazn\u00edk po\u017e\u00e1d\u00e1 o laserov\u00e9 vrt\u00e1n\u00ed.<br>b. Slep\u00e9 pr\u016fchodky mohou b\u00fdt velmi mal\u00e9 (&lt;= 6 MIL), tak\u017ee je lze spolehliv\u011b vyvrtat pouze laserem.<br>c. U speci\u00e1ln\u00edch zaslepen\u00fdch a zakopan\u00fdch pr\u016fchodek - nap\u0159\u00edklad pokud je zaslepen\u00e1 pr\u016fchodka z L1 do L2 a zakopan\u00e1 pr\u016fchodka z L2 do L3 - je nutn\u00e9 vrt\u00e1n\u00ed laserem.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Princip laserov\u00e9ho vrt\u00e1n\u00ed<\/h4>\n\n\n\n<p>Laserov\u00e9 vrt\u00e1n\u00ed vyu\u017e\u00edv\u00e1 teplo laseru k odpa\u0159en\u00ed nebo roztaven\u00ed materi\u00e1lu desky a vytvo\u0159en\u00ed otvoru. Aby to fungovalo, mus\u00ed materi\u00e1l desky absorbovat energii laseru. Z tohoto d\u016fvodu se b\u011b\u017en\u011b pou\u017e\u00edvaj\u00ed materi\u00e1ly typu RCC, proto\u017ee neobsahuj\u00ed tkaninu ze sklen\u011bn\u00fdch vl\u00e1ken, a tak laser neodr\u00e1\u017eej\u00ed.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Kr\u00e1tk\u00fd \u00favod do materi\u00e1lu RCC<\/h4>\n\n\n\n<p>RCC znamen\u00e1 m\u011b\u010f pota\u017een\u00e1 prysky\u0159ic\u00ed. Jedn\u00e1 se o m\u011bd\u011bnou f\u00f3lii, kter\u00e1 m\u00e1 na hrub\u00e9 stran\u011b elektrolytick\u00e9 m\u011bd\u011bn\u00e9 f\u00f3lie vrstvu speci\u00e1ln\u00ed prysky\u0159ice.<br>V na\u0161\u00ed spole\u010dnosti m\u00e1me t\u0159i dodavatele RCC: Shengyi, Mitsui a LG.<br>Mo\u017enosti materi\u00e1lu: tlou\u0161\u0165ka prysky\u0159ice 50, 65, 70, 75, 80 \u00b5m, tlou\u0161\u0165ka m\u011bd\u011bn\u00e9 f\u00f3lie 12, 18 \u00b5m atd.<br>RCC se dod\u00e1v\u00e1 ve t\u0159\u00edd\u00e1ch s vysokou Tg a n\u00edzkou Tg. Jeho dielektrick\u00e1 konstanta je obvykle ni\u017e\u0161\u00ed ne\u017e u standardn\u00edho FR-4. Nap\u0159\u00edklad S6018 od Shengyi m\u00e1 dielektrickou konstantu 3,8, tak\u017ee si dejte pozor, kdy\u017e pot\u0159ebujete \u0159\u00eddit impedanci.<br>Podrobnosti o konkr\u00e9tn\u00edch materi\u00e1lech z\u00edsk\u00e1te od t\u00fdmu PE (Product Engineering) nebo RD (Research &amp; Development).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. Po\u017eadavky na n\u00e1stroje a n\u00e1\u0159ad\u00ed pro laserov\u00e9 vrt\u00e1n\u00ed<\/h4>\n\n\n\n<p>A) Laser t\u011b\u017eko prop\u00e1l\u00ed m\u011b\u010f. Proto p\u0159ed vrt\u00e1n\u00edm laserem vyleptejte m\u011bd\u011bnou mezeru v m\u00edstech slep\u00fdch pr\u016fchod\u016f. V\u016fle by m\u011bla odpov\u00eddat velikosti hotov\u00e9ho otvoru.<br>B) Na vrstvu L2 \/ L(N-1) se p\u0159idaj\u00ed polohovac\u00ed zna\u010dky pro laserov\u00e9 vrt\u00e1n\u00ed. Ozna\u010dte si to na str\u00e1nce pro zm\u011bnu vrstvy MI.<br>C) F\u00f3lie pro lept\u00e1n\u00ed slep\u00fdch skvrn mus\u00ed b\u00fdt vyrobena metodou LDI. \u0158ezan\u00e9 panely a n\u00e1stroje mus\u00ed pou\u017e\u00edvat velikost panelu LDI.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">5. Funkce v\u00fdrobn\u00edho toku<\/h4>\n\n\n\n<p>A) Pokud je celkov\u00fd po\u010det vrstev desky N, vytvo\u0159te nejprve vrstvy L2-L(N-1) podle b\u011b\u017en\u00e9ho postupu pro vnit\u0159n\u00ed vrstvy.<br>B) Po laminaci a po vyfr\u00e9zov\u00e1n\u00ed obrysu desky zm\u011b\u0148te tok takto:<br>\u2192 vrt\u00e1n\u00ed registra\u010dn\u00edch otvor\u016f LDI \u2192 such\u00e1 f\u00f3lie \u2192 lept\u00e1n\u00ed slep\u00fdch m\u00edst \u2192 laserov\u00e1 vrta\u010dka \u2192 vrt\u00e1n\u00ed pr\u016fchoz\u00edch otvor\u016f \u2192 elektrolytick\u00e1 m\u011b\u010f \u2192 (b\u011b\u017en\u00fd proces).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">6. Ostatn\u00ed pozn\u00e1mky<\/h4>\n\n\n\n<p>A) Materi\u00e1ly RCC nejsou v mnoha p\u0159\u00edpadech certifikov\u00e1ny UL. Proto na tyto desky prozat\u00edm nep\u0159id\u00e1vejte zna\u010dku UL.<br>B) O rozvr\u017een\u00ed panelu a MI: abyste se vyhnuli tomu, \u017ee rozvr\u017een\u00ed, kter\u00e1 obsahuj\u00ed RCC, budou pova\u017eov\u00e1na za fale\u0161n\u00e9 panely (f\u00f3liovn\u00edk MI vyr\u00e1b\u00ed fale\u0161n\u00e9 vrstvy jinak ne\u017e b\u011b\u017en\u00e9 f\u00f3lie), odd\u011blte p\u0159i kreslen\u00ed struktury panelu RCC od L2 nebo L(N-1). Viz nap\u0159\u00edklad rozvr\u017een\u00ed panelu SR2711\/01.<br>C) IPC-6016 je standard pro desky HDI:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Laserem zaslepen\u00e1 tlou\u0161\u0165ka m\u011bd\u011bn\u00e9 st\u011bny: 0,4 mil (min).<\/li>\n\n\n\n<li>Po\u017eadavek na p\u00e1jec\u00ed ku\u017eel: tangenci\u00e1ln\u00ed spoj je povolen.<\/li>\n\n\n\n<li>Pokud velikost podlo\u017eky nen\u00ed o v\u00edce ne\u017e 5 milimetr\u016f v\u011bt\u0161\u00ed ne\u017e pr\u016fm\u011br otvoru, zva\u017ete p\u0159id\u00e1n\u00ed slzi\u010dky.<br>D) Udr\u017eujte hranu desky \u2265 0,8\u201d.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"548\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout.webp\" alt=\"SR2711-01 panel layout\" class=\"wp-image-4806\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-300x206.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-768x526.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">B) Mechanick\u00e9 vrt\u00e1n\u00ed pro slep\u00e9\/zapu\u0161t\u011bn\u00e9 pr\u016fchodky<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Rozsah pou\u017eit\u00ed<\/h4>\n\n\n\n<p>Pokud je velikost vrt\u00e1ku \u2265 0,20 mm, zva\u017ete mechanick\u00e9 vrt\u00e1n\u00ed.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Metoda pokovov\u00e1n\u00ed pro slep\u00e9\/zapu\u0161t\u011bn\u00e9 pr\u016fchodky (viz ozn\u00e1men\u00ed RD TSFMRD-113)<\/h4>\n\n\n\n<p>A) Obvykle m\u016f\u017ee m\u00edt m\u011bd\u011bn\u00fd povrch obvodu jak\u00e9koliv vrstvy pouze jeden krok pokoven\u00ed panelu a jeden krok pokoven\u00ed vzoru.<br>B) Obvykle po dokon\u010den\u00ed procesu \u00fapln\u00e9 laminace a tlou\u0161\u0165ce desky \u2265 80 MIL je nutn\u00e9 pr\u016fchoz\u00ed otvory pokovit + pokovit vzor. Proto p\u0159i pokovov\u00e1n\u00ed slep\u00fdch pr\u016fchodek nesm\u00ed b\u00fdt povrch vn\u011bj\u0161\u00ed vrstvy panelov\u011b pokoven.<br>C) Pokud jsou spln\u011bny oba v\u00fd\u0161e uveden\u00e9 body, prov\u00e1d\u00ed se pokovov\u00e1n\u00ed naslepo n\u00e1sleduj\u00edc\u00edm zp\u016fsobem:<br>I) Pokud je \u0161\u00ed\u0159ka stopy vn\u011bj\u0161\u00ed vrstvy &gt; 6 MIL a tlou\u0161\u0165ka desky s pr\u016fchoz\u00edmi otvory &lt; 80 MIL, m\u016f\u017ee b\u00fdt povrch desky vn\u011bj\u0161\u00ed vrstvy p\u0159i pokovov\u00e1n\u00ed naslepo pokoven.<br>II) Pokud je \u0161\u00ed\u0159ka stopy vn\u011bj\u0161\u00ed vrstvy &gt; 6 MIL, ale tlou\u0161\u0165ka desky s pr\u016fchoz\u00edmi otvory &gt; 80 MIL, je t\u0159eba p\u0159i pokovov\u00e1n\u00ed slep\u00fdmi cestami povrch vn\u011bj\u0161\u00ed vrstvy chr\u00e1nit f\u00f3li\u00ed.<br>III) Pokud je \u0161\u00ed\u0159ka stopy vn\u011bj\u0161\u00ed vrstvy &lt; 6 MIL a tlou\u0161\u0165ka desky s pr\u016fchoz\u00edmi otvory \u2265 80 MIL, je t\u0159eba p\u0159i pokovov\u00e1n\u00ed naslepo povrch vn\u011bj\u0161\u00ed vrstvy chr\u00e1nit filmem.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Filmov\u00e9 metody (p\u00e1jec\u00ed maska \/ such\u00fd film)<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pokud je pom\u011br stran L\/D \u2264 0,8, naneste na povrch vn\u011bj\u0161\u00ed vrstvy suchou f\u00f3lii a vystavte cel\u00fd panel. Pot\u00e9 se povrchy vnit\u0159n\u00ed vrstvy s mrtv\u00fdmi skly elektrolyticky pokov\u00ed jako cel\u00fd panel.<\/li>\n\n\n\n<li>P\u0159i pom\u011bru stran slep\u00fdch skvrn L\/D &gt; 0,8 naneste na povrch vn\u011bj\u0161\u00ed vrstvy suchou f\u00f3lii a odhalte pouze m\u00edsta slep\u00fdch skvrn. K tomu je t\u0159eba zhotovit pokovovac\u00ed bodovou expozi\u010dn\u00ed f\u00f3lii nebo pou\u017e\u00edt expozici LDI. Pot\u00e9 se povrchy slep\u00fdch uli\u010dek vnit\u0159n\u00ed vrstvy elektrolyticky pokov\u00ed jako cel\u00fd panel.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">4. Metody expozice slep\u00fdch skvrn<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>U slep\u00fdch pr\u016fchodek \u2264 0,4 mm (16 MIL) pou\u017eijte k odhalen\u00ed m\u00edst slep\u00fdch pr\u016fchodek technologii LDI.<\/li>\n\n\n\n<li>V p\u0159\u00edpad\u011b slep\u00fdch pr\u016fchodek &gt; 0,4 mm (16 MIL) pou\u017eijte k odkryt\u00ed m\u00edst slep\u00fdch pr\u016fchodek f\u00f3lii.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">5. Metody f\u00f3li\u00ed pro zakopan\u00e9 pr\u016fchodky<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pokud je \u0161\u00ed\u0159ka bo\u010dn\u00ed stopy zakopan\u00e9ho m\u00e9dia \u2264 4 MIL, pot\u0159ebuje povrch zakopan\u00e9ho m\u00e9dia f\u00f3lii, aby se m\u00edsta odhalila.<\/li>\n\n\n\n<li>Pokud je \u0161\u00ed\u0159ka bo\u010dn\u00ed stopy zakopan\u00e9ho veden\u00ed &gt; 4 MIL, m\u016f\u017ee b\u00fdt povrch zakopan\u00e9ho veden\u00ed pokoven p\u0159\u00edmo.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">6. Pozn\u00e1mky a body k zapamatov\u00e1n\u00ed<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Pro pom\u011br L\/D: L = tlou\u0161\u0165ka dielektrika + tlou\u0161\u0165ka m\u011bdi, D = pr\u016fm\u011br zaslepen\u00e9\/zapu\u0161t\u011bn\u00e9 pr\u016fchodky.<\/li>\n\n\n\n<li>Pro slep\u00e9\/vyp\u00e1len\u00e9 pr\u016fchoz\u00ed f\u00f3lie: pr\u016fm\u011br expozi\u010dn\u00edho m\u00edsta D_spot = D - 6 (MIL).\n<ul class=\"wp-block-list\">\n<li>P\u0159idejte zarovn\u00e1vac\u00ed zna\u010dky na expozi\u010dn\u00ed f\u00f3lii. Jejich sou\u0159adnice mus\u00ed odpov\u00eddat vn\u011bj\u0161\u00edm referen\u010dn\u00edm otvor\u016fm.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Slep\u00e9 pr\u016fchodky, kter\u00e9 vy\u017eaduj\u00ed ochranu f\u00f3li\u00ed, se obvykle p\u0159i galvanick\u00e9m pokovov\u00e1n\u00ed pokovuj\u00ed pulzn\u00edm proudem (AC).<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Speci\u00e1ln\u00ed po\u017eadavky a pozn\u00e1mky k postupu pro desky pro nevidom\u00e9<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Slep\u00e9 pr\u016fchodky pln\u011bn\u00e9 prysky\u0159ic\u00ed<\/strong>:<br>P\u0159i velk\u00fdch rozm\u011brech zakopan\u00fdch pr\u016fchodek a velk\u00e9m po\u010dtu otvor\u016f m\u016f\u017ee b\u00fdt pro zalisov\u00e1n\u00ed desky pot\u0159eba velk\u00e9 mno\u017estv\u00ed prysky\u0159ice, aby se pr\u016fchodky vyplnily. Aby to neovlivnilo kone\u010dnou tlou\u0161\u0165ku desky, m\u016f\u017ee v\u00fdzkum a v\u00fdvoj po\u017eadovat p\u0159edb\u011b\u017en\u00e9 vypln\u011bn\u00ed zakopan\u00fdch pr\u016fchodek prysky\u0159ic\u00ed p\u0159ed laminac\u00ed. Metoda vypl\u0148ov\u00e1n\u00ed se m\u016f\u017ee \u0159\u00eddit metodou vypl\u0148ov\u00e1n\u00ed pr\u016fchodek zelenou p\u00e1jec\u00ed maskou.<\/li>\n\n\n\n<li><strong>Kdy\u017e m\u00e1 vn\u011bj\u0161\u00ed vrstva slep\u00e9 pr\u016fchody<\/strong>:<br>a. B\u011bhem lisov\u00e1n\u00ed m\u016f\u017ee vn\u011bj\u0161\u00ed vrstva vyt\u00e9kat prysky\u0159ici. Proto po laminov\u00e1n\u00ed p\u0159idejte krok odstran\u011bn\u00ed prysky\u0159ice (odstran\u011bn\u00ed gumy).<br>b. Povrch desky se p\u0159ed zaschnut\u00edm vn\u011bj\u0161\u00ed vrstvy o\u010dist\u00ed a provede se le\u0161t\u011bn\u00ed desky. Chemick\u00e1 m\u011b\u010f (elektrolytick\u00e1 m\u011b\u010f) je velmi tenk\u00e1 (pouze 0,05-0,1 milimetru), tak\u017ee se m\u016f\u017ee p\u0159i le\u0161t\u011bn\u00ed opot\u0159ebovat. Abyste tomu p\u0159ede\u0161li, p\u0159idejte krok pokoven\u00ed desky, kter\u00fd m\u011b\u010f zes\u00edl\u00ed. Typick\u00fd pr\u016fb\u011bh: laminace \u2192 odstran\u011bn\u00ed prysky\u0159ice \u2192 vrt\u00e1n\u00ed \u2192 elektrolytick\u00e1 m\u011b\u010f \u2192 pokoven\u00ed panelu \u2192 such\u00fd film \u2192 pokoven\u00ed vzoru.<\/li>\n\n\n\n<li><strong>Desky s vysok\u00fdm po\u010dtem vrstev pro zaslepen\u00ed a PIN-LAM<\/strong>:<br>P\u0159i v\u00fdrob\u011b desek s mnoha vrstvami a slep\u00fdmi pr\u016fchodkami lze pou\u017e\u00edt laminaci PIN-LAM. V\u0161imn\u011bte si, \u017ee na\u0161e stroje mohou vrtat otvory PIN-LAM pouze v p\u0159\u00edpad\u011b, \u017ee tlou\u0161\u0165ka j\u00e1dra je men\u0161\u00ed ne\u017e 30 MIL. V mnoha p\u0159\u00edpadech st\u00e1le pou\u017e\u00edv\u00e1me norm\u00e1ln\u00ed laminaci; nap\u0159\u00edklad PR4726010 se vyr\u00e1b\u00ed s norm\u00e1ln\u00ed laminac\u00ed.<\/li>\n\n\n\n<li><strong>Okraj desky<\/strong>:<br>Proto\u017ee m\u016f\u017ee existovat v\u00edce laminac\u00ed a mnoho procesn\u00edch otvor\u016f, ponechte okraj desky \u2265 0,8\u201d.<\/li>\n\n\n\n<li><strong>Karta LOT a pozn\u00e1mky k panelu<\/strong>:<br>P\u0159i z\u00e1pisu karty LOT je t\u0159eba pro d\u00edl\u010d\u00ed procesy zapsat strukturu panelu pro jednotliv\u00fd d\u00edl\u010d\u00ed proces a ve zvl\u00e1\u0161tn\u00edch po\u017eadavc\u00edch zapsat tak\u00e9 strukturu panelu hlavn\u00edho procesu. To usnadn\u00ed pozd\u011bj\u0161\u00ed operace.<\/li>\n\n\n\n<li><strong>Kam um\u00edstit suchou f\u00f3lii pro nevidom\u00e9 (vnit\u0159n\u00ed nebo vn\u011bj\u0161\u00ed vrstva)<\/strong>:<br>Uve\u010fte p\u0159\u00edklady: Pokud je tlou\u0161\u0165ka A j\u00e1dra v\u011bt\u0161\u00ed ne\u017e 12 MIL (bez tlou\u0161\u0165ky m\u011bdi), pak um\u00edst\u011bte suchou f\u00f3lii na vn\u011bj\u0161\u00ed vrstvu. Pokud je tlou\u0161\u0165ka A j\u00e1dra men\u0161\u00ed ne\u017e 12 MIL (bez tlou\u0161\u0165ky m\u011bdi), um\u00edst\u011bte suchou f\u00f3lii na vnit\u0159n\u00ed vrstvu.<\/li>\n<\/ol>\n\n\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Rychl\u00e9 p\u0159ipomenut\u00ed a kontrolovan\u00e9 hodnoty<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Udr\u017eujte hranu desky \u2265 0,8\u201d.<\/li>\n\n\n\n<li>Laserem zaslepen\u00e1 m\u011bd\u011bn\u00e1 st\u011bna \u2265 0,4 mil.<\/li>\n\n\n\n<li>V p\u0159\u00edpad\u011b rozd\u00edlu velikosti podlo\u017eky a otvoru \u2264 5 milimetr\u016f doporu\u010dujeme pou\u017e\u00edt slzi\u010dky.<\/li>\n\n\n\n<li>Pro laserov\u00e9 vrt\u00e1n\u00ed pou\u017e\u00edvejte RCC, proto\u017ee RCC absorbuje laser.<\/li>\n\n\n\n<li>P\u0159i pokovov\u00e1n\u00ed zaslepen\u00fdmi\/zapu\u0161t\u011bn\u00fdmi pr\u016fchodkami zkontrolujte \u0161\u00ed\u0159ku stopy vn\u011bj\u0161\u00ed vrstvy a celkovou tlou\u0161\u0165ku desky, abyste se rozhodli, zda pokovit desku nebo ji chr\u00e1nit f\u00f3li\u00ed.<\/li>\n\n\n\n<li>L\/D = (dielektrikum + m\u011b\u010f) \/ pr\u016fm\u011br otvoru. Tento \u00fadaj pou\u017eijte p\u0159i volb\u011b expozi\u010dn\u00edch a filmov\u00fdch metod.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>1. Overview Blind vias and buried vias are mainly used for high-density boards and for boards with very small holes. 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