{"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\/fi\/pcb-blind-and-buried-via-manufacturing-process-guide\/","title":{"rendered":"PCB Blind ja Buried Via valmistusprosessin opas"},"content":{"rendered":"<h2 class=\"wp-block-heading\">1. Yleiskatsaus<\/h2>\n\n\n\n<p>Sokeita ja upotettuja l\u00e4pivientej\u00e4 k\u00e4ytet\u00e4\u00e4n p\u00e4\u00e4asiassa tihe\u00e4sti asennetuissa piirilevyiss\u00e4 sek\u00e4 piirilevyiss\u00e4, joissa on hyvin pieni\u00e4 reiki\u00e4. Tavoitteena on s\u00e4\u00e4st\u00e4\u00e4 reititystilaa ja siten pienent\u00e4\u00e4 piirilevy\u00e4. Tyypillinen esimerkki ovat matkapuhelinten piirilevyt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Luokittelu<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">A) Laserporaus<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Syit\u00e4 laserporauksen k\u00e4ytt\u00f6\u00f6n<\/h4>\n\n\n\n<p>a. Asiakas pyyt\u00e4\u00e4 laserporauspalvelua.<br>b. Sokeat l\u00e4piviennit voivat olla hyvin pieni\u00e4 (&lt;= 6 MIL), joten vain laserilla ne voidaan porata luotettavasti.<br>c. Erityisten sokeiden ja upotettujen l\u00e4pivientipinojen osalta \u2014 esimerkiksi jos on sokea l\u00e4pivienti kerroksesta L1 kerrokseen L2 ja upotettu l\u00e4pivienti kerroksesta L2 kerrokseen L3 \u2014 tarvitaan laserporaus.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Laserporauksen toimintaperiaate<\/h4>\n\n\n\n<p>Laserporauksessa hy\u00f6dynnet\u00e4\u00e4n laserin tuottamaa l\u00e4mp\u00f6\u00e4 levymateriaalin h\u00f6yryst\u00e4miseen tai sulattamiseen ja rei\u00e4n tekemiseen. Jotta t\u00e4m\u00e4 toimisi, levymateriaalin on imett\u00e4v\u00e4 laserenergiaa. T\u00e4st\u00e4 syyst\u00e4 k\u00e4ytet\u00e4\u00e4n yleisesti RCC-tyyppisi\u00e4 materiaaleja, sill\u00e4 ne eiv\u00e4t sis\u00e4ll\u00e4 lasikuitukangasta eiv\u00e4tk\u00e4 siten heijasta laseria.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Lyhyt esittely RCC-materiaalista<\/h4>\n\n\n\n<p>RCC tarkoittaa Resin Coated Copper (hartsipinnoitettu kupari). Se on kuparifolio, jonka elektrolyyttisen kuparifolion karhealle puolelle on levitetty kerros erityist\u00e4 hartsia.<br>Yrityksell\u00e4mme on kolme RCC-toimittajaa: Shengyi, Mitsui ja LG.<br>Materiaalivaihtoehdot: hartsin paksuus 50, 65, 70, 75, 80 \u00b5m, kuparifolion paksuus 12, 18 \u00b5m jne.<br>RCC-levyj\u00e4 on saatavana sek\u00e4 korkean Tg:n ett\u00e4 matalan Tg:n laatuina. Niiden dielektrisyysvakio on yleens\u00e4 alhaisempi kuin tavallisella FR-4-levyll\u00e4. Esimerkiksi Shengyin S6018-levyn dielektrisyysvakio on 3,8, joten ole varovainen, kun impedanssia on tarpeen s\u00e4\u00e4t\u00e4\u00e4.<br>Jos haluat lis\u00e4tietoja tietyist\u00e4 materiaaleista, ota yhteytt\u00e4 PE- (tuotekehitys) tai RD- (tutkimus ja kehitys) tiimiin.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. Laservalmistuksen ty\u00f6kalut ja ty\u00f6kaluvaatimukset<\/h4>\n\n\n\n<p>A) Laserin on vaikea polttaa kuparia l\u00e4pi. Siksi ennen laserporausvaihetta on sy\u00f6vytett\u00e4v\u00e4 kupariin aukko sokeiden l\u00e4pivientien kohdalle. Aukon koon tulisi vastata valmiin rei\u00e4n kokoa.<br>B) Laserporauksen kohdistusmerkit lis\u00e4t\u00e4\u00e4n L2 \/ L(N-1)-kerrokseen. Merkitse t\u00e4m\u00e4 MI-kalvonvaihtosivulle.<br>C) Sokeiden l\u00e4pivientikohtien etsaukseen k\u00e4ytett\u00e4v\u00e4 kalvo on valmistettava LDI-menetelm\u00e4ll\u00e4. Leikattujen paneelien ja ty\u00f6kalujen on noudatettava LDI-paneelikokoa.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">5. Tuotantoprosessin ominaisuudet<\/h4>\n\n\n\n<p>A) Kun piirilevyn kerrosten kokonaism\u00e4\u00e4r\u00e4 on N, valmistetaan ensin kerrokset L2\u2013L(N-1) noudattaen tavanomaista sis\u00e4kerrosprosessia.<br>B) Laminoinnin ja levyn \u00e4\u00e4riviivojen jyrsinn\u00e4n j\u00e4lkeen muuta ty\u00f6nkulkua seuraavasti:<br>\u2192 LDI-rekister\u00f6intireikien poraus \u2192 kuivakalvo \u2192 sokeiden l\u00e4pivientikohtien sy\u00f6vytys \u2192 laserporaus \u2192 l\u00e4pivientireikien poraus \u2192 kemiallinen kuparipinnoitus \u2192 (normaali prosessi).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">6. Muita huomautuksia<\/h4>\n\n\n\n<p>A) RCC-materiaalit eiv\u00e4t useimmissa tapauksissa ole UL-sertifioituja. \u00c4l\u00e4 siis toistaiseksi lis\u00e4\u00e4 UL-merkki\u00e4 n\u00e4ihin levyihin.<br>B) Paneelirakenteesta ja MI:st\u00e4: jotta RCC:t\u00e4 sis\u00e4lt\u00e4vi\u00e4 rakenteita ei k\u00e4sitelt\u00e4isi v\u00e4\u00e4rennettyjen kerrosten paneeleina (MI:n kalvopaja valmistaa v\u00e4\u00e4rennettyjen kerrosten kalvot eri tavalla kuin tavalliset kalvot), erota RCC L2:sta tai L(N-1):st\u00e4 piirt\u00e4ess\u00e4si paneelirakennetta. Katso esimerkiksi paneelirakenne SR2711\/01.<br>C) IPC-6016 on HDI-levyjen standardi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Laserleikatun sokean l\u00e4piviennin sein\u00e4m\u00e4n kuparin paksuus: 0,4 mil (v\u00e4hint\u00e4\u00e4n).<\/li>\n\n\n\n<li>Juotosliitoksen vaatimukset: kosketuspiste on sallittu.<\/li>\n\n\n\n<li>Jos aluslevyn koko on enint\u00e4\u00e4n 5 mil suurempi kuin rei\u00e4n halkaisija, harkitse pisaranmuotoisen aluslevyn lis\u00e4\u00e4mist\u00e4.<br>D) Pid\u00e4 levyn reuna v\u00e4hint\u00e4\u00e4n 0,8 tuumaa.<\/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) Mekaaninen poraus sokeiden\/upotettujen l\u00e4pivientien poraamiseen<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Soveltamisala<\/h4>\n\n\n\n<p>Kun poranter\u00e4n koko on \u2265 0,20 mm, kannattaa harkita mekaanista porausta.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Sokeiden\/upotettujen l\u00e4pivientien pinnoitusmenetelm\u00e4 (ks. RD-ilmoitus TSFMRD-113)<\/h4>\n\n\n\n<p>A) Yleens\u00e4 mink\u00e4 tahansa kerroksen piirien kuparipinnalle riitt\u00e4\u00e4 yksi paneelipinnoitusvaihe ja yksi kuviointipinnoitusvaihe.<br>B) Yleens\u00e4 kun koko laminointiprosessi on p\u00e4\u00e4ttynyt ja levyn paksuus on \u2265 80 MIL, l\u00e4pivientirei\u00e4t vaativat paneelipinnoituksen ja kuvion pinnoituksen. Siksi sokeiden l\u00e4pivientireikien pinnoituksessa ulkokerroksen pintaa ei saa pinnoittaa paneelipinnoituksella.<br>C) Jos edell\u00e4 mainitut kaksi ehtoa t\u00e4yttyv\u00e4t, sokeiden l\u00e4pivientien pinnoitus suoritetaan seuraavasti:<br>I) Jos ulkokerroksen johtimen leveys on &gt; 6 MIL ja l\u00e4pivientirei'ill\u00e4 varustetun piirilevyn paksuus on &lt; 80 MIL, ulkokerroksen paneelin pinta voidaan pinnoittaa paneelipinnoituksella sokeiden l\u00e4pivientireikien pinnoituksen yhteydess\u00e4.<br>II) Jos ulkokerroksen johtimen leveys on &gt; 6 MIL, mutta l\u00e4pivientirei'ill\u00e4 varustetun piirilevyn paksuus on &gt; 80 MIL, ulkokerroksen pinta on suojattava kalvolla sokeiden l\u00e4pivientien pinnoituksen aikana.<br>III) Jos ulkokerroksen johtimen leveys on &lt; 6 MIL ja l\u00e4pivientirei&#039;ill\u00e4 varustetun piirilevyn paksuus on \u2265 80 MIL, ulkokerroksen pinta on suojattava kalvolla sokeiden l\u00e4pivientireikien pinnoituksen aikana.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Kalvomenetelm\u00e4t (juotosmaski \/ kuivakalvo)<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Kun sokean l\u00e4piviennin L\/D-suhde on \u2264 0,8, levitet\u00e4\u00e4n kuivakalvo ulkokerroksen pinnalle ja valotetaan koko levy. Sen j\u00e4lkeen sis\u00e4kerroksen sokeiden l\u00e4pivientien pinnat pinnoitetaan kemiallisesti koko levyn osalta.<\/li>\n\n\n\n<li>Kun sokeiden l\u00e4pivientien L\/D-suhde on &gt; 0,8, levit\u00e4 kuivakalvo ulkokerroksen pinnalle ja valota vain sokeiden l\u00e4pivientien kohdat. T\u00e4t\u00e4 varten on valmistettava pinnoitusvalotuskalvo tai k\u00e4ytett\u00e4v\u00e4 LDI-valotusta. Sen j\u00e4lkeen sis\u00e4kerrosten sokeiden l\u00e4pivientien pinnat pinnoitetaan kemiallisesti koko paneelin osalta.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">4. Menetelm\u00e4t sokeiden l\u00e4pivientipisteiden valottamiseksi<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Kun sokeiden l\u00e4pivientien halkaisija on \u2264 0,4 mm (16 MIL), k\u00e4yt\u00e4 LDI-tekniikkaa sokeiden l\u00e4pivientien kohtien valottamiseen.<\/li>\n\n\n\n<li>Kun sokeiden l\u00e4pivientien halkaisija on yli 0,4 mm (16 MIL), k\u00e4yt\u00e4 kalvoa sokeiden l\u00e4pivientien kohtien valottamiseen.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">5. Elokuvamenetelm\u00e4t upotettujen l\u00e4pivientien valmistukseen<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Kun upotetun l\u00e4piviennin sivujuonteen leveys on \u2264 4 MIL, upotetun l\u00e4piviennin pinnalle on levitett\u00e4v\u00e4 kalvoa pisteiden paljastamiseksi.<\/li>\n\n\n\n<li>Kun upotetun l\u00e4piviennin sivujuonteen leveys on &gt; 4 MIL, upotetun l\u00e4piviennin pinta voidaan p\u00e4\u00e4llyst\u00e4\u00e4 suoraan paneelilla.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">6. Huomautuksia ja muistettavia seikkoja<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>L\/D-suhteen osalta: L = dielektrisen kerroksen paksuus + kuparikerroksen paksuus, D = sokean\/upotetun l\u00e4piviennin halkaisija.<\/li>\n\n\n\n<li>Sokeiden\/upotettujen l\u00e4pivientien pinnoituskalvojen osalta: valotuspisteen halkaisija D_spot = D \u2013 6 (MIL).\n<ul class=\"wp-block-list\">\n<li>Lis\u00e4\u00e4 kohdistusmerkit valotuskalvoon. Niiden koordinaattien on vastattava ulompia vertailureiki\u00e4.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Sis\u00e4iset l\u00e4piviennit, jotka tarvitsevat kalvosuojaa, pinnoitetaan yleens\u00e4 pulssivirralla (vaihtovirta) galvanoinnin aikana.<\/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. Erityisvaatimukset ja prosessiohjeet l\u00e4pivientirei\u00e4tt\u00f6mille piirilevyille<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Hartsilla t\u00e4ytetyt sokeat l\u00e4piviennit<\/strong>:<br>Kun upotettujen l\u00e4pivientien koko on suuri ja reiki\u00e4 on paljon, piirilevyn puristuksessa saatetaan tarvita paljon hartsia l\u00e4pivientien t\u00e4ytt\u00e4miseen. Jotta t\u00e4m\u00e4 ei vaikuttaisi piirilevyn lopulliseen paksuuteen, tuotekehitysosasto saattaa pyyt\u00e4\u00e4 upotettujen l\u00e4pivientien esit\u00e4ytt\u00e4mist\u00e4 hartsilla ennen laminointia. T\u00e4ytt\u00f6tapa voi noudattaa vihre\u00e4n juotosmaskin l\u00e4pivientien t\u00e4ytt\u00f6tapaa.<\/li>\n\n\n\n<li><strong>Kun ulkokerroksessa on sokeita l\u00e4pivientej\u00e4<\/strong>:<br>a. Puristuksen aikana ulkokerroksesta voi vuotaa hartsia. Siksi laminoinnin j\u00e4lkeen on suoritettava hartsinpoistovaihe (de-gumming).<br>b. Ennen ulkokerroksen kuivakalvon levitt\u00e4mist\u00e4 piirilevyn pinta puhdistetaan ja suoritetaan kiillotusvaihe. Kemiallinen kuparipinnoite (elektrolyyttinen kupari) on eritt\u00e4in ohut (vain 0,05\u20130,1 mil), joten se voi kulua pois kiillotuksen aikana. T\u00e4m\u00e4n v\u00e4ltt\u00e4miseksi lis\u00e4t\u00e4\u00e4n paneelipinnoitusvaihe kuparikerroksen paksuuntamiseksi. Tyypillinen prosessij\u00e4rjestys: laminointi \u2192 hartsin poisto \u2192 poraus \u2192 kemiallinen kuparipinnoitus \u2192 paneelipinnoitus \u2192 kuivakalvo \u2192 kuvion pinnoitus.<\/li>\n\n\n\n<li><strong>Suurikerroksiset piirilevyt, joissa on sokeita l\u00e4pivientej\u00e4, ja PIN-LAM<\/strong>:<br>Kun valmistetaan monikerroksisia piirilevyj\u00e4, joissa on sokeita l\u00e4pivientej\u00e4, voidaan k\u00e4ytt\u00e4\u00e4 PIN-LAM-laminointia. Huomaa, ett\u00e4 koneillamme voidaan porata PIN-LAM-reiki\u00e4 vain, kun ytimen paksuus on alle 30 MIL. Useimmissa tapauksissa k\u00e4yt\u00e4mme kuitenkin edelleen tavallista laminointia; esimerkiksi malli PR4726010 on valmistettu tavallisella laminoinnilla.<\/li>\n\n\n\n<li><strong>laudan reuna<\/strong>:<br>Koska laminointikerroksia voi olla useita ja prosessireiki\u00e4 paljon, j\u00e4t\u00e4 levyn reuna v\u00e4hint\u00e4\u00e4n 0,8 tuuman levyiseksi.<\/li>\n\n\n\n<li><strong>LOT-kortti ja paneelin muistiinpanot<\/strong>:<br>LOT-korttia laadittaessa on aliprosessien osalta kuvattava kyseisen yksitt\u00e4isen aliprosessin paneelirakenne ja lis\u00e4ksi mainittava p\u00e4\u00e4prosessin paneelirakenne erityisvaatimuksissa. T\u00e4m\u00e4 helpottaa my\u00f6hemp\u00e4\u00e4 toimintaa.<\/li>\n\n\n\n<li><strong>Mihin sokean l\u00e4piviennin kuivakalvo sijoitetaan (sis\u00e4- vai ulkokerrokseen)?<\/strong>:<br>Esimerkkej\u00e4: jos ytimen paksuus A on yli 12 MIL (kuparin paksuutta lukuun ottamatta), kuivakalvo tulee sijoittaa ulkokerrokseen. Jos ytimen paksuus A on alle 12 MIL (kuparin paksuutta lukuun ottamatta), kuivakalvo tulee sijoittaa sis\u00e4kerrokseen.<\/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. Lyhyet muistutukset ja tarkistetut arvot<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pid\u00e4 levyn reuna v\u00e4hint\u00e4\u00e4n 0,8 tuumaa.<\/li>\n\n\n\n<li>Laserleikattujen sokeiden l\u00e4pivientien sein\u00e4m\u00e4n kuparikerros \u2265 0,4 mil.<\/li>\n\n\n\n<li>Kun tyynyn ja rei\u00e4n koon ero on enint\u00e4\u00e4n 5 mil, suosittelemme pisaranmuotoisia tyynyj\u00e4.<\/li>\n\n\n\n<li>K\u00e4yt\u00e4 RCC:t\u00e4 laserporauksessa, koska RCC imee laserin.<\/li>\n\n\n\n<li>Sokeiden tai upotettujen l\u00e4pivientien pinnoituksessa on tarkistettava ulkokerroksen johtimen leveys ja piirilevyn kokonaispaksuus, jotta voidaan p\u00e4\u00e4tt\u00e4\u00e4, k\u00e4ytet\u00e4\u00e4nk\u00f6 paneelipinnoitusta vai suojataanko ne kalvolla.<\/li>\n\n\n\n<li>L\/D = (dielektrinen materiaali + kupari) \/ rei\u00e4n halkaisija. T\u00e4t\u00e4 arvoa k\u00e4ytet\u00e4\u00e4n valittaessa valotus- ja kalvomenetelmi\u00e4.<\/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. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4808,"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":"","ast-disable-related-posts":"","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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