{"id":22915,"date":"2025-04-15T18:09:19","date_gmt":"2025-04-15T18:09:19","guid":{"rendered":"https:\/\/www.semlab.com\/?p=22915"},"modified":"2025-04-15T18:09:19","modified_gmt":"2025-04-15T18:09:19","slug":"pwb-internal-short-example-b","status":"publish","type":"post","link":"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/","title":{"rendered":"PWB Internal Short \u2013 Example B"},"content":{"rendered":"<div class=\"boldgrid-section\">\n<div class=\"container\">\n<div class=\"row\">\n<div class=\"col-lg-12 col-md-12 col-xs-12 col-sm-12\">\n<p class=\"\">&nbsp;<\/p>\n<p class=\"\">&nbsp;<\/p>\n<p class=\"p3\"><b>Investigating Internal Shorts in PWBs: Example B<\/b><b><\/b><\/p>\n<p class=\"p1\">In multilayer printed wiring boards (PWBs), internal shorts can arise from subtle but critical manufacturing defects. This case study highlights a failure mode linked to drill or inner layer misregistration, which compromised the electrical clearance between a plated through-hole (PTH) via and a 24V internal plane. The resulting drill-induced laminate damage, combined with radial cracking, facilitated an unintended electrical bridge. Through microsectional and optical analysis, we demonstrate how mechanical misalignments propagate into latent electrical reliability risks.<\/p>\n<p class=\"p2\">&nbsp;<\/p>\n<div class=\"row bg-editor-hr-wrap\">\n<div class=\"col-lg-12 col-md-12 col-xs-12 col-sm-12\">\n<hr>\n<\/div>\n<\/div>\n<p class=\"\">&nbsp;<\/p>\n<p class=\"\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-22916\" src=\"https:\/\/www.semlab.com\/wp-content\/uploads\/2025\/04\/PWB-Shorts.002.jpeg\" alt=\"\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.semlab.com\/wp-content\/uploads\/2025\/04\/PWB-Shorts.002.jpeg 1024w, https:\/\/www.semlab.com\/wp-content\/uploads\/2025\/04\/PWB-Shorts.002-300x225.jpeg 300w, https:\/\/www.semlab.com\/wp-content\/uploads\/2025\/04\/PWB-Shorts.002-768x576.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp; Investigating Internal Shorts in PWBs: Example B In multilayer printed wiring boards (PWBs), internal shorts can arise from subtle but critical manufacturing defects. This case study highlights a failure mode linked to drill or inner layer misregistration, which compromised the electrical clearance between a plated through-hole (PTH) via and a 24V internal plane. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":"no","ngg_post_thumbnail":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22915","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PWB Internal Short \u2013 Example B - SEM Lab Inc.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PWB Internal Short \u2013 Example B - SEM Lab Inc.\" \/>\n<meta property=\"og:description\" content=\"&nbsp; &nbsp; Investigating Internal Shorts in PWBs: Example B In multilayer printed wiring boards (PWBs), internal shorts can arise from subtle but critical manufacturing defects. This case study highlights a failure mode linked to drill or inner layer misregistration, which compromised the electrical clearance between a plated through-hole (PTH) via and a 24V internal plane. [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/\" \/>\n<meta property=\"og:site_name\" content=\"SEM Lab Inc.\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-15T18:09:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.semlab.com\/wp-content\/uploads\/2025\/04\/PWB-Shorts.002.jpeg\" \/>\n<meta name=\"author\" content=\"Ed Hare PhD\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ed Hare PhD\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/\"},\"author\":{\"name\":\"Ed Hare PhD\",\"@id\":\"https:\/\/www.semlab.com\/old\/#\/schema\/person\/fe841085a5f591792d70aca10ca2a2e8\"},\"headline\":\"PWB Internal Short \u2013 Example B\",\"datePublished\":\"2025-04-15T18:09:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/\"},\"wordCount\":92,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.semlab.com\/wp-content\/uploads\/2025\/04\/PWB-Shorts.002.jpeg\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/\",\"url\":\"https:\/\/www.semlab.com\/old\/pwb-internal-short-example-b\/\",\"name\":\"PWB Internal Short \u2013 Example B - 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