{"id":5060,"date":"2026-02-02T08:27:00","date_gmt":"2026-02-02T00:27:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5060"},"modified":"2026-01-21T16:27:49","modified_gmt":"2026-01-21T08:27:49","slug":"pcb-failure-analysis-methods-explained","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/","title":{"rendered":"PCB-virheanalyysimenetelm\u00e4t selitetty"},"content":{"rendered":"<p>PCB-virheanalyysi on <span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\">j\u00e4rjestelm\u00e4llinen prosessi, jossa tunnistetaan syyt\u00a0<strong>painetun piirilevyn vikaantumisesta<\/strong>\u00a0ja m\u00e4\u00e4ritt\u00e4\u00e4<\/span> perimm\u00e4inen syy.<\/p><p>Toisin kuin tarkastuksessa, jossa havaitaan vikoja, vika-analyysiss\u00e4 selitet\u00e4\u00e4n seuraavat asiat <strong>miten ja miksi vikoja muodostuu<\/strong>-usein sen j\u00e4lkeen, kun piirilevy on jo vikaantunut kent\u00e4ll\u00e4 tai luotettavuustestien aikana.<\/p><p>T\u00e4ss\u00e4 artikkelissa esitell\u00e4\u00e4n yleisimm\u00e4t piirilevyjen vikojen analysointimenetelm\u00e4t ja milloin kutakin niist\u00e4 tulisi k\u00e4ytt\u00e4\u00e4.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"337\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-1.jpg\" alt=\"PCB-viat\" class=\"wp-image-5056\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-1-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-1-18x10.jpg 18w\" 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\/pcb-failure-analysis-methods-explained\/#Why_PCB_Failure_Analysis_Is_Necessary\" >Miksi PCB-virheanalyysi on v\u00e4ltt\u00e4m\u00e4t\u00f6n<\/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\/pcb-failure-analysis-methods-explained\/#Electrical_Failure_Analysis\" >S\u00e4hk\u00f6isten vikojen analysointi<\/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\/pcb-failure-analysis-methods-explained\/#Common_Techniques\" >Yleiset tekniikat<\/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\/pcb-failure-analysis-methods-explained\/#Best_Used_For\" >Parhaiten k\u00e4ytet\u00e4\u00e4n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Cross-Section_Analysis\" >Poikkileikkausanalyysi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#What_It_Reveals\" >Mit\u00e4 se paljastaa<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Limitations\" >Rajoitukset<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#X-Ray_Inspection\" >R\u00f6ntgentarkastus<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Detectable_Issues\" >Havaittavat ongelmat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Limitations-2\" >Rajoitukset<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Thermal_Stress_Testing\" >L\u00e4mp\u00f6kuormitustestausessSuunnitteluohjeet:<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Common_Methods\" >Yleiset menetelm\u00e4t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Best_For\" >Paras<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Environmental_Stress_Testing\" >Ymp\u00e4rist\u00f6n stressitestaus<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Examples\" >Esimerkkej\u00e4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Typical_Findings\" >Tyypilliset havainnot<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Microscopy_and_Material_Analysis\" >Mikroskopointi ja materiaalianalyysi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#Common_Techniques-2\" >Yleiset tekniikat<\/a><\/li><\/ul><\/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\/pcb-failure-analysis-methods-explained\/#Failure_Analysis_Workflow\" >Vika-analyysin ty\u00f6nkulku<\/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\/pcb-failure-analysis-methods-explained\/#Linking_Failure_Analysis_Back_to_Manufacturing\" >Vika-analyysin yhdist\u00e4minen valmistukseen<\/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\/pcb-failure-analysis-methods-explained\/#Failure_Analysis_vs_Routine_Inspection\" >Vika-analyysi vs. rutiinitarkastus<\/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\/pcb-failure-analysis-methods-explained\/#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-23\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-failure-analysis-methods-explained\/#PCB_Failure_Analysis_FAQ\" >PCB-virheanalyysi FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_PCB_Failure_Analysis_Is_Necessary\"><\/span>Miksi PCB-virheanalyysi on v\u00e4ltt\u00e4m\u00e4t\u00f6n<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Vika-analyysi on olennaisen t\u00e4rke\u00e4\u00e4, kun:<\/p><ul class=\"wp-block-list\"><li>H\u00e4iri\u00f6t ovat ajoittaisia<\/li>\n\n<li>Vikaantuminen tapahtuu ymp\u00e4rist\u00f6stressin j\u00e4lkeen<\/li>\n\n<li>Useat levyt ep\u00e4onnistuvat samalla tavalla<\/li>\n\n<li>Juurisyy on ep\u00e4selv\u00e4 tarkastuksen j\u00e4lkeen<\/li><\/ul><p>Se antaa kriittist\u00e4 palautetta suunnittelun, materiaalien ja valmistusprosessien parantamiseksi.<\/p><p><em>Yleiskatsaus ep\u00e4onnistumiseen:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-failures-causes-solutions\/\">Yleiset PCB-viat selitetty<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Electrical_Failure_Analysis\"><\/span>S\u00e4hk\u00f6isten vikojen analysointi<span class=\"ez-toc-section-end\"><\/span><\/h2><p>S\u00e4hk\u00f6inen analyysi on usein ensimm\u00e4inen diagnoosivaihe.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Techniques\"><\/span>Yleiset tekniikat<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Jatkuvuustestaus<\/li>\n\n<li>Eristysresistanssin (IR) testaus<\/li>\n\n<li>Vuotovirran mittaus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Best_Used_For\"><\/span>Parhaiten k\u00e4ytet\u00e4\u00e4n<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Avaa ja shortsit<\/li>\n\n<li>Ajoittaiset viat<\/li>\n\n<li>CAF:iin liittyv\u00e4 vuoto<\/li><\/ul><p><em>CAF-konteksti:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/caf-failure-in-pcb-explained\/\">CAF:n ep\u00e4onnistuminen PCB:ss\u00e4 selitetty<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cross-Section_Analysis\"><\/span>Poikkileikkausanalyysi<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Poikkileikkaus paljastaa fyysisesti piirilevyn sis\u00e4iset rakenteet.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_It_Reveals\"><\/span>Mit\u00e4 se paljastaa<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Tynnyrin halkeamien kautta<\/li>\n\n<li>Kuparipinnoituksen paksuus<\/li>\n\n<li>Delaminaatio ja tyhj\u00e4t tilat<\/li>\n\n<li>Hartsin n\u00e4lk\u00e4<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limitations\"><\/span>Rajoitukset<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Tuhoisa<\/li>\n\n<li>N\u00e4ytteeseen perustuva<\/li><\/ul><p><em>Rakenteelliset viat:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/\">Haljenneet viat ja tynnyrihalkeamat<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"X-Ray_Inspection\"><\/span>R\u00f6ntgentarkastus<span class=\"ez-toc-section-end\"><\/span><\/h2><p>R\u00f6ntgenanalyysi mahdollistaa sis\u00e4isen tarkastuksen rikkomattomasti.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Detectable_Issues\"><\/span>Havaittavat ongelmat<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Sis\u00e4inen virheellinen rekister\u00f6inti<\/li>\n\n<li>Pinnoitus ontelot<\/li>\n\n<li>Delaminaatioalueet<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limitations-2\"><\/span>Rajoitukset<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Hienojen halkeamien rajallinen resoluutio<\/li>\n\n<li>Kaikkia vikatyyppej\u00e4 ei voida havaita<\/li><\/ul><p><em>Tarkastuksen viite:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/x-ray-inspection-in-pcb-manufacturing\/\">R\u00f6ntgentarkastus PCB-valmistuksessa<\/a><\/strong><\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"472\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-3.jpg\" alt=\"Yleiset PCB-viat\" class=\"wp-image-5039\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-3-300x236.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/Common-PCB-Failures-3-15x12.jpg 15w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_Stress_Testing\"><\/span>L\u00e4mp\u00f6kuormitustestausessSuunnitteluohjeet:<span class=\"ez-toc-section-end\"><\/span><\/h2><p>L\u00e4mp\u00f6j\u00e4nnitys kiihdytt\u00e4\u00e4 piilevi\u00e4 vikoja.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Methods\"><\/span>Yleiset menetelm\u00e4t<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>L\u00e4mp\u00f6kierto<\/li>\n\n<li>L\u00e4mp\u00f6shokki<\/li>\n\n<li>Reflow-simulointi<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Best_For\"><\/span>Paras<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Halkeamien kautta<\/li>\n\n<li>Delaminaatio<\/li>\n\n<li>Juotosliitoksiin liittyv\u00e4t ongelmat<\/li><\/ul><p><em>Luotettavuuslinkki:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-reliability-testing-standards\/\">PCB-luotettavuuden testaus selitetty<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Environmental_Stress_Testing\"><\/span>Ymp\u00e4rist\u00f6n stressitestaus<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Ymp\u00e4rist\u00f6testit simuloivat todellisia olosuhteita.<\/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>Korkean kosteuden testaus<\/li>\n\n<li>HAST (eritt\u00e4in nopeutettu stressitesti)<\/li>\n\n<li>Puolueellinen kosteustesti<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_Findings\"><\/span>Tyypilliset havainnot<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>CAF:n muodostaminen<\/li>\n\n<li>Eristyksen hajoaminen<\/li>\n\n<li>Korroosioon liittyv\u00e4t viat<\/li><\/ul><p><em>Delaminaatioyhteys:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-delamination-causes-prevention\/\">PCB Delamination Syyt ja ehk\u00e4isy<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Microscopy_and_Material_Analysis\"><\/span>Mikroskopointi ja materiaalianalyysi<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Kehittyneet ty\u00f6kalut tarjoavat mikrotason n\u00e4kemyksi\u00e4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Techniques-2\"><\/span>Yleiset tekniikat<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Optinen mikroskooppi<\/li>\n\n<li>SEM (pyyhk\u00e4isyelektronimikroskooppi)<\/li>\n\n<li>Alkuaineanalyysi<\/li><\/ul><p>N\u00e4it\u00e4 menetelmi\u00e4 k\u00e4ytet\u00e4\u00e4n silloin, kun standardianalyysi ei tuota tulosta.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Failure_Analysis_Workflow\"><\/span>Vika-analyysin ty\u00f6nkulku<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Vikaantumisanalyysiprosessi on yleens\u00e4 j\u00e4sennelty seuraavasti:<\/p><ol class=\"wp-block-list\"><li>Vikaoireiden dokumentointi<\/li>\n\n<li>Rikkomaton tarkastus<\/li>\n\n<li>S\u00e4hk\u00f6inen analyysi<\/li>\n\n<li>Stressitestaus<\/li>\n\n<li>Tuhoava analyysi (tarvittaessa)<\/li>\n\n<li>Perimm\u00e4isen syyn tunnistaminen<\/li><\/ol><p>T\u00e4m\u00e4 ty\u00f6nkulku minimoi tarpeettomat vahingot ja s\u00e4ilytt\u00e4\u00e4 todisteet.<\/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=\"Linking_Failure_Analysis_Back_to_Manufacturing\"><\/span>Vika-analyysin yhdist\u00e4minen valmistukseen<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Vika-analyysi ei ole p\u00e4\u00e4tepiste.<\/p><p>Tulosten pit\u00e4isi antaa palautetta:<\/p><ul class=\"wp-block-list\"><li>Suunnittelus\u00e4\u00e4nt\u00f6jen p\u00e4ivitykset<\/li>\n\n<li>Materiaalivalinnan muutokset<\/li>\n\n<li>Prosessiparametrien s\u00e4\u00e4d\u00f6t<\/li><\/ul><p>TOPFASTin kaltaiset valmistajat k\u00e4ytt\u00e4v\u00e4t vika-analyysitietoja prosessi-ikkunoiden tarkentamiseen ja pitk\u00e4n aikav\u00e4lin luotettavuuden parantamiseen.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Failure_Analysis_vs_Routine_Inspection\"><\/span>Vika-analyysi vs. rutiinitarkastus<span class=\"ez-toc-section-end\"><\/span><\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Aspect<\/th><th>Vika-analyysi<\/th><th>Tarkastus<\/th><\/tr><\/thead><tbody><tr><td>K\u00e4ytt\u00f6tarkoitus<\/td><td>Perimm\u00e4isen syyn tunnistaminen<\/td><td>Vian havaitseminen<\/td><\/tr><tr><td>Ajoitus<\/td><td>Ep\u00e4onnistumisen j\u00e4lkeen<\/td><td>Tuotannon aikana<\/td><\/tr><tr><td>Menetelm\u00e4t<\/td><td>Tuhoava ja ei-tuhoava<\/td><td>Enimm\u00e4kseen ei-tuhoava<\/td><\/tr><tr><td>Tulos<\/td><td>Prosessien parantaminen<\/td><td>Laadunvalvonta<\/td><\/tr><\/tbody><\/table><\/figure><p><em>Yleiskatsaus tarkastukseen:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-inspection-and-testing\/\">PCB:n tarkastus ja testaus selitetty<\/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>PCB-virheanalyysi tarjoaa kriittisen n\u00e4kemyksen <strong>miksi hallitukset ep\u00e4onnistuvat<\/strong>, ei vain miten.<\/p><p>Yhdist\u00e4m\u00e4ll\u00e4 s\u00e4hk\u00f6testauksen, l\u00e4mp\u00f6rasituksen, poikkileikkauksen ja ymp\u00e4rist\u00f6analyysin valmistajat voivat:<\/p><ul class=\"wp-block-list\"><li>Tunnistetaan perimm\u00e4iset syyt<\/li>\n\n<li>Suunnittelun kest\u00e4vyyden parantaminen<\/li>\n\n<li>Est\u00e4\u00e4 tulevat ep\u00e4onnistumiset<\/li><\/ul><p>Se on luotettavan PCB-valmistuksen kulmakivi.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_Failure_Analysis_FAQ\"><\/span>PCB-virheanalyysi 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-1768983474775\"><strong class=\"schema-faq-question\">Q: <strong>Onko vika-analyysi aina tuhoisaa?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Ei. Tuhoavia menetelmi\u00e4 k\u00e4ytet\u00e4\u00e4n vain tarvittaessa.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768983522401\"><strong class=\"schema-faq-question\">Q: <strong>Voiko vika-analyysill\u00e4 ehk\u00e4ist\u00e4 tulevia vikoja?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Kyll\u00e4, kun tuloksia sovelletaan suunnittelu- ja prosessimuutoksiin.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768983561841\"><strong class=\"schema-faq-question\">Q: <strong>Kuinka kauan vika-analyysi kest\u00e4\u00e4?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: P\u00e4iv\u00e4st\u00e4 viikkoihin, monimutkaisuudesta riippuen.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768983654502\"><strong class=\"schema-faq-question\">Q: <strong>Onko vika-analyysi vain korkean luotettavuuden piirilevyj\u00e4 varten?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Ei, mutta se on arvokkain siell\u00e4.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768983744452\"><strong class=\"schema-faq-question\">Q: <strong>Voidaanko CAF vahvistaa ilman tuhoavia testej\u00e4?<\/strong><\/strong> <p class=\"schema-faq-answer\">V: Yleens\u00e4 ei. Stressitestausta tarvitaan.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>T\u00e4ss\u00e4 artikkelissa esitell\u00e4\u00e4n t\u00e4rkeimm\u00e4t piirilevyjen vikojen analysointitekniikat, kuten poikkileikkaus, r\u00f6ntgentarkastus, l\u00e4mp\u00f6j\u00e4nnitystestaus ja s\u00e4hk\u00f6inen analyysi. N\u00e4m\u00e4 menetelm\u00e4t auttavat tehokkaasti tunnistamaan ja diagnosoimaan piirilevyjen vikojen perimm\u00e4iset syyt.<\/p>","protected":false},"author":1,"featured_media":5016,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[438],"class_list":["post-5060","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>PCB Failure Analysis Methods Explained: Tools, Techniques, and Use Cases<\/title>\n<meta name=\"description\" content=\"Learn the most effective PCB failure analysis methods, including cross-section, X-ray, thermal stress testing, and electrical analysis.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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take?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: From days to weeks, depending on complexity.","inLanguage":"fi"},"inLanguage":"fi"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-failure-analysis-methods-explained\/#faq-question-1768983654502","position":4,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-failure-analysis-methods-explained\/#faq-question-1768983654502","name":"Q: Is failure analysis only for high-reliability PCBs?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: No, but it is most valuable there.","inLanguage":"fi"},"inLanguage":"fi"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-failure-analysis-methods-explained\/#faq-question-1768983744452","position":5,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-failure-analysis-methods-explained\/#faq-question-1768983744452","name":"Q: Can CAF be confirmed without destructive testing?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Usually 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