{"id":5047,"date":"2026-01-30T08:20:00","date_gmt":"2026-01-30T00:20:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5047"},"modified":"2026-01-16T16:30:42","modified_gmt":"2026-01-16T08:30:42","slug":"caf-failure-in-pcb-explained","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/","title":{"rendered":"CAF-svigt i PCB: \u00c5rsager, mekanisme og forebyggelse"},"content":{"rendered":"<p>Fejl i Conductive Anodic Filament (CAF) er et af de mest udfordrende problemer med PCB-p\u00e5lidelighed, fordi det er <strong>latent, progressiv og ofte usynlig<\/strong> under standardinspektion.<\/p><p>I mods\u00e6tning til umiddelbare elektriske defekter udvikler CAF sig langsomt under specifikke milj\u00f8m\u00e6ssige og elektriske forhold, hvilket g\u00f8r det til et kritisk problem for applikationer med h\u00f8j p\u00e5lidelighed.<\/p><p>Det forklarer denne artikel:<\/p><ul class=\"wp-block-list\"><li>Hvad CAF er<\/li>\n\n<li>Hvordan det dannes<\/li>\n\n<li>Hvorfor er det sv\u00e6rt at opdage<\/li>\n\n<li>S\u00e5dan reducerer PCB-producenter CAF-risikoen<\/li><\/ul><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\/CAF-Failure-in-PCB-Explained-2.jpg\" alt=\"CAF-fejl i PCB forklaret\" class=\"wp-image-5048\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-2-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-2-18x10.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\">Indholdsfortegnelse<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#What_Is_CAF_Conductive_Anodic_Filament\" >Hvad er CAF (Conductive Anodic Filament)?<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Why_CAF_Is_a_Serious_Reliability_Risk\" >Hvorfor CAF er en alvorlig p\u00e5lidelighedsrisiko<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Conditions_Required_for_CAF_Formation\" >N\u00f8dvendige betingelser for dannelse af CAF<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Moisture_Presence\" >Tilstedev\u00e6relse af fugt<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Electrical_Bias\" >Elektrisk forsp\u00e6nding<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Susceptible_Material_Structure\" >Modtagelig materialestruktur<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#CAF_Growth_Mechanism\" >CAF's v\u00e6kstmekanisme<\/a><\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Design_Factors_That_Increase_CAF_Risk\" >Designfaktorer, der \u00f8ger CAF-risikoen<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#High-Risk_Design_Practices\" >Designpraksisser med h\u00f8j risiko<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Manufacturing_Factors_Contributing_to_CAF\" >Produktionsfaktorer, der bidrager til CAF<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#H3_Drilling_Damage\" >H3: Boreskade<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Inadequate_Resin_Fill\" >Utilstr\u00e6kkelig harpiksfyldning<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Material_Selection\" >Valg af materiale<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#How_CAF_Is_Detected\" >Hvordan CAF opdages<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Detection_Methods_Include\" >Detektionsmetoder omfatter<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Preventing_CAF_in_PCB_Manufacturing\" >Forebyggelse af CAF i PCB-produktion<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Material_Qualification\" >Kvalificering af materialer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Design_Rule_Optimization\" >Optimering af designregler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/caf-failure-in-pcb-explained\/#Process_Control_Improvements\" >Forbedringer af processtyringen<\/a><\/li><\/ul><\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Relationship_Between_CAF_and_Other_Failure_Modes\" >Forholdet mellem CAF og andre fejltyper<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#Conclusion\" >Konklusion<\/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\/da\/blog\/caf-failure-in-pcb-explained\/#CAF_Failure_in_PCB_FAQ\" >FAQ om CAF-fejl i PCB<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_CAF_Conductive_Anodic_Filament\"><\/span>Hvad er CAF (Conductive Anodic Filament)?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF er v\u00e6ksten af en <strong>metallisk ledende bane<\/strong> mellem tilst\u00f8dende kobberelementer inde i et printkort.<\/p><p>Det dannes typisk:<\/p><ul class=\"wp-block-list\"><li>Langs gr\u00e6nseflader af glasfiber<\/li>\n\n<li>Mellem t\u00e6tliggende ledere<\/li>\n\n<li>Under elektrisk forsp\u00e6nding og fugteksponering<\/li><\/ul><p>N\u00e5r CAF f\u00f8rst er dannet, kan den skabe kortslutninger eller l\u00e6kageveje.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_CAF_Is_a_Serious_Reliability_Risk\"><\/span>Hvorfor CAF er en alvorlig p\u00e5lidelighedsrisiko<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF-fejl er farlige, fordi de:<\/p><ul class=\"wp-block-list\"><li>Vises l\u00e6nge efter fremstillingen<\/li>\n\n<li>For\u00e5rsager intermitterende eller pludselige elektriske kortslutninger<\/li>\n\n<li>Er vanskelige at reproducere under laboratorieforhold<\/li><\/ul><p>Mange fejl i marken kan spores tilbage til, at CAF bestod alle indledende elektriske tests.<\/p><p><em>Relateret oversigt:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/common-pcb-failures-causes-solutions\/\">Almindelige PCB-fejl forklaret<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conditions_Required_for_CAF_Formation\"><\/span>N\u00f8dvendige betingelser for dannelse af CAF<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF opst\u00e5r ikke tilf\u00e6ldigt. Flere forhold skal v\u00e6re til stede samtidig.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Moisture_Presence\"><\/span>Tilstedev\u00e6relse af fugt<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Fugt muligg\u00f8r ionisk transport inde i printkortet.<\/p><p>Kilder inkluderer:<\/p><ul class=\"wp-block-list\"><li>Milj\u00f8er med h\u00f8j luftfugtighed<\/li>\n\n<li>Utilstr\u00e6kkelig t\u00f8rring af materialer<\/li>\n\n<li>D\u00e5rlige opbevaringsforhold for PCB<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Electrical_Bias\"><\/span>Elektrisk forsp\u00e6nding<span class=\"ez-toc-section-end\"><\/span><\/h3><p>CAF-v\u00e6kst kr\u00e6ver et sp\u00e6ndingspotentiale mellem lederne.<\/p><p>Scenarier med h\u00f8jere risiko:<\/p><ul class=\"wp-block-list\"><li>H\u00f8jsp\u00e6ndingsdesigns<\/li>\n\n<li>Konstant DC-forsp\u00e6nding<\/li>\n\n<li>Smal lederafstand<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Susceptible_Material_Structure\"><\/span>Modtagelig materialestruktur<span class=\"ez-toc-section-end\"><\/span><\/h3><p>CAF spreder sig ofte:<\/p><ul class=\"wp-block-list\"><li>Langs gr\u00e6nseflader af glasfiber-harpiks<\/li>\n\n<li>Gennem harpiksfattige regioner<\/li>\n\n<li>T\u00e6t p\u00e5 borede huller eller vias<\/li><\/ul><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\/CAF-Failure-in-PCB-Explained.jpg\" alt=\"CAF-fejl i PCB forklaret\" class=\"wp-image-5049\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-18x10.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"CAF_Growth_Mechanism\"><\/span>CAF's v\u00e6kstmekanisme<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF-dannelsesprocessen f\u00f8lger typisk disse trin:<\/p><ol class=\"wp-block-list\"><li>Fugtoptagelse i det dielektriske materiale<\/li>\n\n<li>Opl\u00f8sning af metalioner ved anoden<\/li>\n\n<li>Ionisk migration langs fiberbaner<\/li>\n\n<li>Filamentv\u00e6kst mod katoden<\/li>\n\n<li>Elektrisk kortslutning eller l\u00e6kage<\/li><\/ol><p>Denne proces accelererer under temperatur- og fugtighedsstress.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design_Factors_That_Increase_CAF_Risk\"><\/span>Designfaktorer, der \u00f8ger CAF-risikoen<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Designbeslutninger har stor indflydelse p\u00e5 CAF-f\u00f8lsomheden.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-Risk_Design_Practices\"><\/span>Designpraksisser med h\u00f8j risiko<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Minimal afstand mellem lederne<\/li>\n\n<li>T\u00e6tte via-strukturer<\/li>\n\n<li>Eksponering for glasfiber i boring<\/li>\n\n<li>Vias med h\u00f8jt aspektforhold<\/li><\/ul><p><em>Link til designp\u00e5lidelighed:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/pcb-quality-and-reliability\/\">Retningslinjer for design af PCB-kvalitet og -p\u00e5lidelighed<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Factors_Contributing_to_CAF\"><\/span>Produktionsfaktorer, der bidrager til CAF<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"H3_Drilling_Damage\"><\/span>H3: Boreskade<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Mekanisk boring kan blotl\u00e6gge glasfibre og skabe foretrukne CAF-veje.<\/p><p><em>Sammenligning af processer:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/pcb-drilling-vs-laser-drilling\/\">PCB-boring vs. laserboring<\/a><\/strong><\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Inadequate_Resin_Fill\"><\/span>Utilstr\u00e6kkelig harpiksfyldning<span class=\"ez-toc-section-end\"><\/span><\/h3><p>D\u00e5rlig fordeling af harpiks efterlader hulrum, der fanger fugt.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Selection\"><\/span>Valg af materiale<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Ikke alle laminatsystemer har samme CAF-resistens.<\/p><p>Materialer med h\u00f8j CAF-resistens har typisk:<\/p><ul class=\"wp-block-list\"><li>Forbedret resin-kemi<\/li>\n\n<li>Bedre vedh\u00e6ftning mellem fiber og harpiks<\/li>\n\n<li>Reduceret ionisk forurening<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_CAF_Is_Detected\"><\/span>Hvordan CAF opdages<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF er sv\u00e6r at opdage med standardinspektion.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Detection_Methods_Include\"><\/span>Detektionsmetoder omfatter<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>H\u00f8jt accelereret stresstest (HAST)<\/li>\n\n<li>Test af isolationsmodstand (IR)<\/li>\n\n<li>Tv\u00e6rsnitsanalyse efter svigt<\/li><\/ul><p><em>Oversigt over test:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/pcb-reliability-testing-standards\/\">PCB-p\u00e5lidelighedstest forklaret<\/a><\/strong><\/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\/CAF-Failure-in-PCB-Explained-1.jpg\" alt=\"CAF-fejl i PCB forklaret\" class=\"wp-image-5050\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-1-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/CAF-Failure-in-PCB-Explained-1-18x10.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Preventing_CAF_in_PCB_Manufacturing\"><\/span>Forebyggelse af CAF i PCB-produktion<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Qualification\"><\/span>Kvalificering af materialer<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Valg af CAF-resistent laminat<\/li>\n\n<li>Validering af materialeleverand\u00f8r<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design_Rule_Optimization\"><\/span>Optimering af designregler<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>St\u00f8rre afstand til h\u00f8jsp\u00e6ndingsnet<\/li>\n\n<li>Kontrolleret via placering<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Process_Control_Improvements\"><\/span>Forbedringer af processtyringen<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Optimerede boreparametre<\/li>\n\n<li>Forbedret afsmitning og resinflow<\/li>\n\n<li>Rent produktionsmilj\u00f8<\/li><\/ul><p>Producenter som TOPFAST indarbejder CAF-risikovurdering under b\u00e5de materialevalg og procesplanl\u00e6gning.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Relationship_Between_CAF_and_Other_Failure_Modes\"><\/span>Forholdet mellem CAF og andre fejltyper<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF eksisterer ofte sammen med:<\/p><ul class=\"wp-block-list\"><li>Delaminering<\/li>\n\n<li>Via revner<\/li>\n\n<li>Nedbrydning af isolering<\/li><\/ul><p><em>Relateret emne:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/pcb-delamination-causes-prevention\/\">PCB-delaminering - \u00e5rsager og forebyggelse<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Konklusion<span class=\"ez-toc-section-end\"><\/span><\/h2><p>CAF-fejl er en <strong>tidsafh\u00e6ngigt p\u00e5lidelighedsproblem<\/strong> drevet af milj\u00f8forhold, elektrisk forsp\u00e6nding og materialestruktur.<\/p><p>Selvom det er sv\u00e6rt at eliminere, kan CAF-risikoen reduceres betydeligt gennem:<\/p><ul class=\"wp-block-list\"><li>Korrekt designafstand<\/li>\n\n<li>CAF-resistente materialer<\/li>\n\n<li>Kontrollerede fremstillingsprocesser<\/li><\/ul><p>Det er vigtigt at forst\u00e5 CAF for at kunne designe og fremstille p\u00e5lidelige printkort til kr\u00e6vende anvendelser.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"CAF_Failure_in_PCB_FAQ\"><\/span>FAQ om CAF-fejl i PCB<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-1768551046101\"><strong class=\"schema-faq-question\">Q: <strong>Kan CAF opdages under almindelige elektriske test?<\/strong><\/strong> <p class=\"schema-faq-answer\">Svar: Normalt ikke. CAF udvikler sig over tid.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768551113734\"><strong class=\"schema-faq-question\">Q: <strong>Er CAF mere almindeligt i h\u00f8jsp\u00e6ndings-PCB'er?<\/strong><\/strong> <p class=\"schema-faq-answer\">A: Ja, elektrisk forsp\u00e6nding fremskynder CAF-v\u00e6ksten.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768551177233\"><strong class=\"schema-faq-question\">Q: <strong>Forhindrer conformal coating CAF?<\/strong><\/strong> <p class=\"schema-faq-answer\">Svar: Det hj\u00e6lper, men eliminerer ikke risikoen helt.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768551258034\"><strong class=\"schema-faq-question\">Q: <strong>Er alle laminatmaterialer lige CAF-resistente?<\/strong><\/strong> <p class=\"schema-faq-answer\">Svar: Nej, CAF-resistens varierer betydeligt fra materialesystem til materialesystem.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768551295767\"><strong class=\"schema-faq-question\">Q: <strong>Er CAF-svigt reversibelt?<\/strong><\/strong> <p class=\"schema-faq-answer\">N\u00e5r CAF f\u00f8rst er dannet, kan den ikke repareres.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>CAF-svigt er et latent p\u00e5lidelighedsproblem i printkort, hvor der dannes ledende filamenter, som for\u00e5rsager kortslutninger. Det skyldes fugt, ionisk forurening og sp\u00e6nding. Detektion involverer elektrisk testning og mikroskopi, mens forebyggelse er afh\u00e6ngig af optimerede materialer, design og fremstillingsprocesser.<\/p>","protected":false},"author":1,"featured_media":5051,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[438],"class_list":["post-5047","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>CAF Failure in PCB Explained: Causes, Mechanism, and Prevention<\/title>\n<meta name=\"description\" content=\"CAF failure is a latent PCB reliability issue. 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