{"id":5035,"date":"2026-01-26T08:35:00","date_gmt":"2026-01-26T00:35:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5035"},"modified":"2026-01-16T14:18:27","modified_gmt":"2026-01-16T06:18:27","slug":"common-pcb-failures-causes-solutions","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/","title":{"rendered":"Yleiset PCB-viat: PCB PCB-piirilevyt: Syyt, oireet ja ratkaisut: Syyt, oireet ja ratkaisut"},"content":{"rendered":"<p>Piirilevyviat ovat harvoin satunnaisia.<br>Useimmissa tapauksissa ep\u00e4onnistumiset johtuvat seuraavista syist\u00e4 <strong>suunnittelup\u00e4\u00e4t\u00f6kset, materiaalivalinnat tai valmistusprosessin rajoitukset.<\/strong>.<\/p><p>Yleisten piirilevyjen vikamuotojen ymm\u00e4rt\u00e4minen auttaa insin\u00f6\u00f6rej\u00e4:<\/p><ul class=\"wp-block-list\"><li>Tunnistetaan perimm\u00e4iset syyt nopeammin<\/li>\n\n<li>Parannetaan valmistettavuuden suunnittelua (DFM).<\/li>\n\n<li>V\u00e4hent\u00e4\u00e4 kentt\u00e4vikoja ja takuukustannuksia<\/li><\/ul><p>T\u00e4ss\u00e4 artikkelissa annetaan k\u00e4yt\u00e4nn\u00f6nl\u00e4heinen katsaus yleisimpiin piirilevyjen vikoihin, niiden oireisiin ja siihen, miten niit\u00e4 ehk\u00e4ist\u00e4\u00e4n nykyaikaisessa piirilevyvalmistuksessa.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"473\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures.jpg\" alt=\"Yleiset PCB-viat\" class=\"wp-image-5036\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-300x237.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-15x12.jpg 15w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Sis\u00e4llysluettelo<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#What_Is_a_PCB_Failure\" >Mik\u00e4 on PCB-virhe?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Open_Circuits_and_Short_Circuits\" >Avoimet piirit ja oikosulut<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Typical_Symptoms\" >Tyypilliset oireet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Common_Causes\" >Yleiset syyt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Prevention_Methods\" >Ehk\u00e4isymenetelm\u00e4t<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Delamination\" >Delaminaatio<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Symptoms\" >Oireet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Root_Causes\" >Juurisyyt<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Delamination-2\" >Delaminaatio<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Symptoms-2\" >Oireet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Root_Causes-2\" >Juurisyyt<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Conductive_Anodic_Filament_CAF_Failures\" >Johtavan anodisen filamentin (CAF) viat<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Characteristics\" >Ominaisuudet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Contributing_Factors\" >My\u00f6t\u00e4vaikuttavat tekij\u00e4t<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Solder_Mask_and_Surface-Related_Failures\" >Juotosnaamion ja pintaan liittyv\u00e4t viat<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Examples\" >Esimerkkej\u00e4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Prevention\" >Ennaltaehk\u00e4isy<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#How_PCB_Failure_Analysis_Is_Performed\" >Miten PCB-virheanalyysi suoritetaan<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Role_of_Manufacturing_Process_Control\" >Tuotantoprosessin valvonnan rooli<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Design_Decisions_That_Increase_Failure_Risk\" >Vikaantumisriski\u00e4 lis\u00e4\u00e4v\u00e4t suunnittelup\u00e4\u00e4t\u00f6kset<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Conclusion\" >P\u00e4\u00e4telm\u00e4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/#Common_PCB_Failures_FAQ\" >Yleiset PCB-viat FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_PCB_Failure\"><\/span>Mik\u00e4 on PCB-virhe?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Piirilevyn vikaantuminen tapahtuu, kun levy ei en\u00e4\u00e4 t\u00e4yt\u00e4 sen vaatimuksia. <strong>s\u00e4hk\u00f6iset, mekaaniset tai luotettavuutta koskevat vaatimukset<\/strong>.<\/p><p>Ep\u00e4onnistumisia voi esiinty\u00e4:<\/p><ul class=\"wp-block-list\"><li>S\u00e4hk\u00f6isen testauksen aikana<\/li>\n\n<li>PCB-kokoonpanon aikana<\/li>\n\n<li>L\u00e4mp\u00f6kierron j\u00e4lkeen<\/li>\n\n<li>Todellisessa k\u00e4yt\u00f6ss\u00e4<\/li><\/ul><p>Monet viat syntyv\u00e4t jo kauan ennen kuin piirilevylle kytket\u00e4\u00e4n virta.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Open_Circuits_and_Short_Circuits\"><\/span>Avoimet piirit ja oikosulut<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_Symptoms\"><\/span>Tyypilliset oireet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>S\u00e4hk\u00f6testin ep\u00e4onnistuminen<\/li>\n\n<li>Ei signaalin jatkuvuutta<\/li>\n\n<li>Odottamattomat virran kulkureitit<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Causes\"><\/span>Yleiset syyt<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Ep\u00e4t\u00e4ydellinen kuparointi<\/li>\n\n<li>Yli- tai alietsaus<\/li>\n\n<li>Sis\u00e4kerroksen virheellinen rekister\u00f6inti<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prevention_Methods\"><\/span>Ehk\u00e4isymenetelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Valvotut etsausprosessit<\/li>\n\n<li>S\u00e4hk\u00f6inen testaus (E-testi)<\/li>\n\n<li>AOI-tarkastus valmistuksen aikana<\/li><\/ul><p><em>Liittyy asiaan:<\/em> <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-electrical-testing-explained\/\">PCB:n s\u00e4hk\u00f6inen testaus selitetty<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Delamination\"><\/span>Delaminaatio<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Delaminaatiolla tarkoitetaan piirilevykerrosten tai kuparin ja dielektrisen materiaalin v\u00e4list\u00e4 erottelua.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Symptoms\"><\/span>Oireet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Rakkuloituminen juottamisen aikana<\/li>\n\n<li>R\u00f6ntgenkuvassa n\u00e4kyv\u00e4t sis\u00e4iset tyhj\u00e4t tilat<\/li>\n\n<li>V\u00e4hentynyt mekaaninen lujuus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Root_Causes\"><\/span>Juurisyyt<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Liiallinen kosteuden imeytyminen<\/li>\n\n<li>Virheelliset laminointiparametrit<\/li>\n\n<li>Yhteensopimattoman materiaalin valinta<\/li><\/ul><p><em>Syv\u00e4llinen opas:<\/em><br><strong>PCB Delamination Syyt ja ehk\u00e4isy<\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Delamination-2\"><\/span>Delaminaatio<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Delaminaatiolla tarkoitetaan piirilevykerrosten tai kuparin ja dielektrisen materiaalin v\u00e4list\u00e4 erottelua.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Symptoms-2\"><\/span>Oireet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Rakkuloituminen juottamisen aikana<\/li>\n\n<li>R\u00f6ntgenkuvassa n\u00e4kyv\u00e4t sis\u00e4iset tyhj\u00e4t tilat<\/li>\n\n<li>V\u00e4hentynyt mekaaninen lujuus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Root_Causes-2\"><\/span>Juurisyyt<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Liiallinen kosteuden imeytyminen<\/li>\n\n<li>Virheelliset laminointiparametrit<\/li>\n\n<li>Yhteensopimattoman materiaalin valinta<\/li><\/ul><p><em>Syv\u00e4llinen opas:<\/em><br><strong>PCB Delamination Syyt ja ehk\u00e4isy<\/strong><\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"477\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-1.jpg\" alt=\"Yleiset PCB-viat\" class=\"wp-image-5037\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-1-300x239.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-1-15x12.jpg 15w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conductive_Anodic_Filament_CAF_Failures\"><\/span>Johtavan anodisen filamentin (CAF) viat<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF on piilev\u00e4 vikatila, joka kehittyy ajan my\u00f6t\u00e4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Characteristics\"><\/span>Ominaisuudet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Asteittainen eristyksen hajoaminen<\/li>\n\n<li>Ilmaantuu usein kuukausien tai vuosien kuluttua<\/li>\n\n<li>Kosteuden ja j\u00e4nnitteen aiheuttama poikkeama laukaisee sen.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Contributing_Factors\"><\/span>My\u00f6t\u00e4vaikuttavat tekij\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Lasikuidulle altistuminen<\/li>\n\n<li>Hartsirikkaat alueet<\/li>\n\n<li>Korkean kosteuden ymp\u00e4rist\u00f6t<\/li><\/ul><p><em>Tekninen erittely:<\/em><br><strong>CAF:n ep\u00e4onnistuminen PCB:ss\u00e4 selitetty<\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solder_Mask_and_Surface-Related_Failures\"><\/span>Juotosnaamion ja pintaan liittyv\u00e4t viat<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Vaikka pintaan liittyv\u00e4t viat j\u00e4\u00e4v\u00e4t usein huomaamatta, ne voivat aiheuttaa todellisia toiminnallisia ongelmia.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Examples\"><\/span>Esimerkkej\u00e4<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Juotosmaskin halkeilu<\/li>\n\n<li>Huono tarttuvuus<\/li>\n\n<li>Korroosioaltistus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prevention\"><\/span>Ennaltaehk\u00e4isy<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Asianmukainen pinnan valmistelu<\/li>\n\n<li>Valvotut kovettumisprosessit<\/li>\n\n<li>Materiaalien yhteensopivuuden tarkastukset<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_PCB_Failure_Analysis_Is_Performed\"><\/span>Miten PCB-virheanalyysi suoritetaan<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Kun vikoja ilmenee, valmistajat k\u00e4ytt\u00e4v\u00e4t strukturoituja analyysimenetelmi\u00e4.<\/p><p>Yleisi\u00e4 ty\u00f6kaluja ovat:<\/p><ul class=\"wp-block-list\"><li>Poikkileikkausanalyysi<\/li>\n\n<li>R\u00f6ntgentarkastus<\/li>\n\n<li>L\u00e4mp\u00f6kuormitustestaus<\/li>\n\n<li>S\u00e4hk\u00f6inen uudelleentestaus<\/li><\/ul><p><em>Menetelmien yleiskatsaus:<\/em><br><strong>PCB-virheanalyysimenetelm\u00e4t selitetty<\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Role_of_Manufacturing_Process_Control\"><\/span>Tuotantoprosessin valvonnan rooli<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Useimmat PCB-viat ovat <strong>estett\u00e4viss\u00e4<\/strong>.<\/p><p>Keskeisi\u00e4 valvonta-alueita ovat:<\/p><ul class=\"wp-block-list\"><li>Laminointiprofiilit<\/li>\n\n<li>Kuparipinnoituksen paksuus<\/li>\n\n<li>Materiaalin varastointi ja k\u00e4sittely<\/li>\n\n<li>Tarkastusten ja testien kattavuus<\/li><\/ul><p>TOPFASTin kaltaiset valmistajat sis\u00e4llytt\u00e4v\u00e4t vikapalautteen jatkuvaan prosessin parantamiseen sen sijaan, ett\u00e4 k\u00e4sittelisiv\u00e4t vikoja yksitt\u00e4isin\u00e4 tapahtumina.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"532\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-2.jpg\" alt=\"Yleiset PCB-viat\" class=\"wp-image-5038\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-2-300x266.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-2-14x12.jpg 14w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design_Decisions_That_Increase_Failure_Risk\"><\/span>Vikaantumisriski\u00e4 lis\u00e4\u00e4v\u00e4t suunnittelup\u00e4\u00e4t\u00f6kset<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Suunnitteluvalinnat vaikuttavat voimakkaasti vikaantumistodenn\u00e4k\u00f6isyyteen.<\/p><p>Suuren riskin suunnitteluk\u00e4yt\u00e4nt\u00f6j\u00e4 ovat muun muassa:<\/p><ul class=\"wp-block-list\"><li>Eritt\u00e4in ohuet dielektriset aineet<\/li>\n\n<li>Minimaaliset rengasrenkaat<\/li>\n\n<li>Suuren kuvasuhteen l\u00e4piviennit<\/li>\n\n<li>Tiiviit v\u00e4lit kosteissa ymp\u00e4rist\u00f6iss\u00e4<\/li><\/ul><p><em>Suunnittelun n\u00e4k\u00f6kulma:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-quality-and-reliability\/\">PCB-laadun ja luotettavuuden suunnitteluohjeet<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>P\u00e4\u00e4telm\u00e4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Piirilevyviat johtuvat harvoin yhdest\u00e4 ainoasta tekij\u00e4st\u00e4.<br>Ne ovat yleens\u00e4 seurausta <strong>suunnittelun, materiaalien ja valmistusprosessien v\u00e4liset vuorovaikutussuhteet.<\/strong>.<\/p><p>Yleisten vikaantumistapojen ymm\u00e4rt\u00e4misen avulla insin\u00f6\u00f6rit voivat:<\/p><ul class=\"wp-block-list\"><li>Suunnittele vankempia piirilevyj\u00e4<\/li>\n\n<li>Sopivien materiaalien valinta<\/li>\n\n<li>Oikeiden tarkastus- ja testausstrategioiden soveltaminen<\/li><\/ul><p>T\u00e4m\u00e4 artikkeli toimii perustana <strong>PCB-virheanalyysi<\/strong> sis\u00e4ll\u00f6n klusteri.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_PCB_Failures_FAQ\"><\/span>Yleiset PCB-viat FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1768535374823\"><strong class=\"schema-faq-question\">Q: <strong>Liittyv\u00e4tk\u00f6 piirilevyviat yleens\u00e4 suunnitteluun vai valmistukseen?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Useimmissa ep\u00e4onnistumisissa on kyse molemmista.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768535415707\"><strong class=\"schema-faq-question\">Q: <strong>Voiko tarkastus poistaa kaikki piirilevyjen viat?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Ei. Tarkastus v\u00e4hent\u00e4\u00e4 riski\u00e4, mutta sill\u00e4 ei voida ennustaa pitk\u00e4aikaista heikkenemist\u00e4. <\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768541686126\"><strong class=\"schema-faq-question\">Q: <strong>Mitk\u00e4 PCB-viat on vaikeinta havaita?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: CAF- ja via-s\u00e4r\u00f6t ovat usein piilevi\u00e4 ja vaativat rasitustestausta.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768541741996\"><strong class=\"schema-faq-question\">Q: <strong>Tarkoittaako korkeampi PCB-kustannus aina v\u00e4hemm\u00e4n vikoja?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Ei. Prosessinhallinta on t\u00e4rke\u00e4mp\u00e4\u00e4 kuin pelk\u00e4t kustannukset.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768541787978\"><strong class=\"schema-faq-question\">Q: <strong>Milloin vika-analyysi on tarpeen?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Kun viat ovat ajoittaisia, toistuvia tai kentt\u00e4\u00e4n liittyvi\u00e4.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>T\u00e4ss\u00e4 artikkelissa selitet\u00e4\u00e4n yleisi\u00e4 piirilevyjen vikoja, kuten oikosulkuja ja delaminaatiota. Siin\u00e4 kerrotaan yksityiskohtaisesti niiden syist\u00e4 ja oireista sek\u00e4 siit\u00e4, miten valmistajat ehk\u00e4isev\u00e4t niit\u00e4 vankalla suunnittelulla, materiaalivalinnoilla ja tiukalla prosessinvalvonnalla.<\/p>","protected":false},"author":1,"featured_media":5039,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[438],"class_list":["post-5035","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-failures"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Common PCB Failures Explained: Causes, Symptoms, and Solutions<\/title>\n<meta name=\"description\" content=\"Learn the most common PCB failures, their root causes, symptoms, and how manufacturers prevent them through design, materials, and process control.\" \/>\n<meta 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