{"id":5054,"date":"2026-01-31T08:14:00","date_gmt":"2026-01-31T00:14:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5054"},"modified":"2026-01-21T15:56:43","modified_gmt":"2026-01-21T07:56:43","slug":"cracked-vias-and-barrel-cracks-in-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/","title":{"rendered":"Spruckna vior och tunnsprickor i kretskort"},"content":{"rendered":"<p>Spruckna vior och barrelsprickor \u00e4r bland de mest kritiska <strong>latenta tillf\u00f6rlitlighetsbrister<\/strong> vid tillverkning av m\u00f6nsterkort.<\/p><p>Dessa defekter klarar ofta de f\u00f6rsta elektriska testerna men fallerar senare under termisk eller mekanisk belastning, vilket g\u00f6r dem s\u00e4rskilt farliga i applikationer med h\u00f6g tillf\u00f6rlitlighet.<\/p><p>Den h\u00e4r artikeln f\u00f6rklarar:<\/p><ul class=\"wp-block-list\"><li>Vad \u00e4r via sprickor och tunnsprickor \u00e4r<\/li>\n\n<li>Varf\u00f6r de uppst\u00e5r<\/li>\n\n<li>Hur de uppt\u00e4cks<\/li>\n\n<li>Hur tillverkare minskar f\u00f6rekomsten av dem<\/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\/PCB-Failures.jpg\" alt=\"Fel p\u00e5 kretskort\" class=\"wp-image-5055\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-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\">Inneh\u00e5llsf\u00f6rteckning<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#What_Are_Via_Cracks_and_Barrel_Cracks\" >Vad \u00e4r Via Cracks och Barrel Cracks?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Via_Crack\" >Via Crack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Barrel_Crack\" >Sprickor i tunnan<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Why_Via_Cracks_Are_a_Serious_Reliability_Issue\" >Varf\u00f6r Via-sprickor \u00e4r en allvarlig tillf\u00f6rlitlighetsfr\u00e5ga<\/a><\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Primary_Causes_of_Via_and_Barrel_Cracks\" >Prim\u00e4ra orsaker till sprickor i r\u00f6r och pipor<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Z-Axis_Expansion_Mismatch\" >Felaktig expansion av Z-axeln<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Thin_or_Non-Uniform_Copper_Plating\" >Tunn eller oj\u00e4mn kopparpl\u00e4tering<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#High_Aspect_Ratio_Vias\" >Vior med h\u00f6gt aspektf\u00f6rh\u00e5llande<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Excessive_Thermal_Cycling\" >\u00d6verdriven termisk cykling<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Design_Factors_That_Increase_Via_Crack_Risk\" >Konstruktionsfaktorer som \u00f6kar risken f\u00f6r sprickbildning<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#High-Risk_Design_Choices\" >Designval med h\u00f6g risk<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Manufacturing_Factors_Contributing_to_Via_Cracks\" >Tillverkningsfaktorer som bidrar till sprickor i Via<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Drilling_Quality\" >Kvalitet p\u00e5 borrning<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Inadequate_Desmear_Process\" >Otillr\u00e4cklig desmear-process<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Plating_Stress_Control\" >Sp\u00e4nningskontroll vid pl\u00e4tering<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#How_Via_Cracks_Are_Detected\" >Hur sprickor i Via uppt\u00e4cks<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Common_Detection_Methods\" >Vanliga detektionsmetoder<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Preventing_Cracked_Vias_and_Barrel_Cracks\" >F\u00f6rebyggande av spruckna vior och tunnsprickor<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Design-Level_Prevention\" >F\u00f6rebyggande p\u00e5 designniv\u00e5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Process-Level_Prevention\" >F\u00f6rebyggande p\u00e5 processniv\u00e5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Material_Selection\" >Val av material<\/a><\/li><\/ul><\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Relationship_to_Other_PCB_Failure_Modes\" >F\u00f6rh\u00e5llande till andra felmodi f\u00f6r kretskort<\/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\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Conclusion\" >Slutsats<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/cracked-vias-and-barrel-cracks-in-pcb\/#Via_Cracks_in_PCB_FAQ\" >FAQ om sprickor i PCB<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_Via_Cracks_and_Barrel_Cracks\"><\/span>Vad \u00e4r Via Cracks och Barrel Cracks?<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Via_Crack\"><\/span>Via Crack<span class=\"ez-toc-section-end\"><\/span><\/h3><p>En via-spricka \u00e4r en spricka i kopparpl\u00e4teringen p\u00e5 en via, vanligtvis vid:<\/p><ul class=\"wp-block-list\"><li>Kn\u00e4et p\u00e5 den via<\/li>\n\n<li>Gr\u00e4nssnittet mellan koppar och dielektrikum<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Barrel_Crack\"><\/span>Sprickor i tunnan<span class=\"ez-toc-section-end\"><\/span><\/h3><p>En barrel crack avser specifikt en <strong>omkretsspricka<\/strong> i den pl\u00e4terade via tunnan.<\/p><p>B\u00e5da avbryter den elektriska kontinuiteten \u00f6ver tid.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Via_Cracks_Are_a_Serious_Reliability_Issue\"><\/span>Varf\u00f6r Via-sprickor \u00e4r en allvarlig tillf\u00f6rlitlighetsfr\u00e5ga<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Via sprickor \u00e4r farliga eftersom de:<\/p><ul class=\"wp-block-list\"><li>\u00c4r ofta intermittenta<\/li>\n\n<li>F\u00f6rsvagas med termisk cykling<\/li>\n\n<li>\u00c4r sv\u00e5ra att uppt\u00e4cka visuellt<\/li><\/ul><p>De upptr\u00e4der ofta f\u00f6rst efter f\u00e4ltanv\u00e4ndning eller stresstest.<\/p><p><em>\u00d6versikt \u00f6ver fel:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/common-pcb-failures-causes-solutions\/\">F\u00f6rklaring av vanliga PCB-fel<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Primary_Causes_of_Via_and_Barrel_Cracks\"><\/span>Prim\u00e4ra orsaker till sprickor i r\u00f6r och pipor<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Z-Axis_Expansion_Mismatch\"><\/span>Felaktig expansion av Z-axeln<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Under uppv\u00e4rmning expanderar dielektriska material mer \u00e4n koppar i Z-axeln.<\/p><p>Upprepad expansion och sammandragning skapar sp\u00e4nningar i via-r\u00f6ret.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thin_or_Non-Uniform_Copper_Plating\"><\/span>Tunn eller oj\u00e4mn kopparpl\u00e4tering<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Otillr\u00e4cklig pl\u00e4teringstjocklek minskar viaens f\u00f6rm\u00e5ga att absorbera mekaniska p\u00e5k\u00e4nningar.<\/p><p> <em>Processdetaljer:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/copper-plating-process-in-pcb-manufacturing-explained\/\">Kopparpl\u00e4teringsprocessen vid tillverkning av m\u00f6nsterkort<\/a><\/strong><\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_Aspect_Ratio_Vias\"><\/span>Vior med h\u00f6gt aspektf\u00f6rh\u00e5llande<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Vior med h\u00f6gt aspektf\u00f6rh\u00e5llande \u00e4r sv\u00e5rare att platta j\u00e4mnt och uts\u00e4tts f\u00f6r st\u00f6rre p\u00e5frestningar.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Excessive_Thermal_Cycling\"><\/span>\u00d6verdriven termisk cykling<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Upprepad exponering f\u00f6r:<\/p><ul class=\"wp-block-list\"><li>\u00c5terfl\u00f6desl\u00f6dning<\/li>\n\n<li>Kraftcykling<\/li>\n\n<li>Temperaturf\u00f6r\u00e4ndringar i milj\u00f6n<\/li><\/ul><p>P\u00e5skyndar sprickbildning.<\/p><p><em>Tillf\u00f6rlitlighetstestning:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/pcb-reliability-testing-standards\/\">Test av termisk tillf\u00f6rlitlighet f\u00f6r kretskort<\/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\/PCB-Failures-1.jpg\" alt=\"Fel p\u00e5 kretskort\" 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><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design_Factors_That_Increase_Via_Crack_Risk\"><\/span>Konstruktionsfaktorer som \u00f6kar risken f\u00f6r sprickbildning<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Vissa konstruktionsbeslut \u00f6kar risken avsev\u00e4rt.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-Risk_Design_Choices\"><\/span>Designval med h\u00f6g risk<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Mycket sm\u00e5 genomg\u00e5ngsdiametrar<\/li>\n\n<li>Tunn kretskortstjocklek med djupa vior<\/li>\n\n<li>Stora kopparplan utan relief<\/li>\n\n<li>T\u00e4ta via-in-pad-strukturer<\/li><\/ul><p>Granskning av design f\u00f6r tillf\u00f6rlitlighet \u00e4r avg\u00f6rande.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Factors_Contributing_to_Via_Cracks\"><\/span>Tillverkningsfaktorer som bidrar till sprickor i Via<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drilling_Quality\"><\/span>Kvalitet p\u00e5 borrning<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Borrsmetning, grova h\u00e5lv\u00e4ggar eller fiberutdragning f\u00f6rsvagar kopparns vidh\u00e4ftning.<\/p><p><em>J\u00e4mf\u00f6relse:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/pcb-drilling-vs-laser-drilling\/\">PCB-borrning vs laserborrning<\/a><\/strong><\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Inadequate_Desmear_Process\"><\/span>Otillr\u00e4cklig desmear-process<span class=\"ez-toc-section-end\"><\/span><\/h3><p>D\u00e5lig avsmetning f\u00f6rhindrar korrekt kopparbindning till dielektrikumet.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Plating_Stress_Control\"><\/span>Sp\u00e4nningskontroll vid pl\u00e4tering<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Felaktig pl\u00e4teringskemi kan leda till inre sp\u00e4nningar i kopparavlagringar.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Via_Cracks_Are_Detected\"><\/span>Hur sprickor i Via uppt\u00e4cks<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Via-sprickor uppt\u00e4cks s\u00e4llan enbart genom ytinspektion.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Detection_Methods\"><\/span>Vanliga detektionsmetoder<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Termisk belastningsprovning<\/li>\n\n<li>Analys av mikrosnitt<\/li>\n\n<li>Elektrisk testning efter cykling<\/li>\n\n<li>R\u00f6ntgeninspektion (begr\u00e4nsad effektivitet)<\/li><\/ul><p><em>\u00d6versikt \u00f6ver inspektioner:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/pcb-inspection-and-testing\/\">Inspektion och testning av kretskort f\u00f6rklaras<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Preventing_Cracked_Vias_and_Barrel_Cracks\"><\/span>F\u00f6rebyggande av spruckna vior och tunnsprickor<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Design-Level_Prevention\"><\/span>F\u00f6rebyggande p\u00e5 designniv\u00e5<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Tillr\u00e4cklig via diameter<\/li>\n\n<li>Kontrollerat bildf\u00f6rh\u00e5llande<\/li>\n\n<li>M\u00f6nster f\u00f6r termisk avlastning<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Process-Level_Prevention\"><\/span>F\u00f6rebyggande p\u00e5 processniv\u00e5<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Optimerade borrningsparametrar<\/li>\n\n<li>Enhetlig tjocklek p\u00e5 kopparpl\u00e4teringen<\/li>\n\n<li>Sp\u00e4nningskontrollerad pl\u00e4teringskemi<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Selection\"><\/span>Val av material<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Material med l\u00e5g expansion i Z-axeln<\/li>\n\n<li>Laminat med h\u00f6gt Tg f\u00f6r termisk stabilitet<\/li><\/ul><p>Tillverkare som TOPFAST integrerar tillf\u00f6rlitlighetsfr\u00e5gor tidigt i processplaneringen.<\/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-2.jpg\" alt=\"Fel p\u00e5 kretskort\" class=\"wp-image-5057\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-2-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/01\/PCB-Failures-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Relationship_to_Other_PCB_Failure_Modes\"><\/span>F\u00f6rh\u00e5llande till andra felmodi f\u00f6r kretskort<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Via sprickor samexisterar ofta med:<\/p><ul class=\"wp-block-list\"><li>Delaminering<\/li>\n\n<li>CAF-bildning<\/li>\n\n<li>Intermittenta \u00f6ppna kretsar<\/li><\/ul><p><em>Relaterat \u00e4mne:<\/em><br><strong><a href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/pcb-delamination-causes-prevention\/\">Delaminering av PCB Orsaker och f\u00f6rebyggande \u00e5tg\u00e4rder<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Slutsats<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Spruckna vior och tunnsprickor \u00e4r inte slumpm\u00e4ssiga defekter utan f\u00f6ruts\u00e4gbara resultat av <strong>termisk p\u00e5frestning, konstruktionsbeslut och processbegr\u00e4nsningar<\/strong>.<\/p><p>Genom:<\/p><ul class=\"wp-block-list\"><li>Korrekt designpraxis<\/li>\n\n<li>Kontrollerade tillverkningsprocesser<\/li>\n\n<li>L\u00e4mpligt materialval<\/li><\/ul><p>F\u00f6rekomsten av dem kan minskas avsev\u00e4rt.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Via_Cracks_in_PCB_FAQ\"><\/span>FAQ om sprickor 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-1768981138484\"><strong class=\"schema-faq-question\">Q: Kan man reparera sprickor som uppst\u00e5tt via en kabel?<\/strong> <p class=\"schema-faq-answer\">S: Nej. N\u00e4r vior v\u00e4l har spruckit kan de inte repareras p\u00e5 ett tillf\u00f6rlitligt s\u00e4tt.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768981208332\"><strong class=\"schema-faq-question\">Q: <strong>Orsakar alla genomg\u00e5ende sprickor omedelbart fel?<\/strong><\/strong> <p class=\"schema-faq-answer\">S: Nej, m\u00e5nga \u00e4r latenta och intermittenta.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768981226138\"><strong class=\"schema-faq-question\">Q: <strong>\u00c4r tjockare koppar alltid b\u00e4ttre?<\/strong><\/strong> <p class=\"schema-faq-answer\">S: Inte alltid, men tillr\u00e4cklig och j\u00e4mn tjocklek \u00e4r avg\u00f6rande.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768981244482\"><strong class=\"schema-faq-question\">Q: <strong>\u00c4r via-sprickor vanligare i blyfri montering?<\/strong><\/strong> <p class=\"schema-faq-answer\">S: Ja, p\u00e5 grund av h\u00f6gre \u00e5terfl\u00f6destemperaturer.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768981259852\"><strong class=\"schema-faq-question\">Q: <strong>Kan r\u00f6ntgen uppt\u00e4cka sprickor?<\/strong><\/strong> <p class=\"schema-faq-answer\">S: Vanligtvis inte om sprickorna inte \u00e4r allvarliga.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>Spruckna vior och barrelsprickor \u00e4r vanliga fel p\u00e5 m\u00f6nsterkort. I den h\u00e4r artikeln beskrivs grundorsakerna, detekteringsteknikerna och de f\u00f6rebyggande \u00e5tg\u00e4rder som tillverkarna anv\u00e4nder f\u00f6r att s\u00e4kerst\u00e4lla tillf\u00f6rlitligheten.<\/p>","protected":false},"author":1,"featured_media":5058,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[438],"class_list":["post-5054","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>Cracked Vias and Barrel Cracks in PCB: Causes, Detection, and Prevention<\/title>\n<meta name=\"description\" content=\"Cracked vias and barrel cracks are common PCB reliability failures. 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Usually not unless cracks are 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