{"id":1917,"date":"2026-09-27T13:46:11","date_gmt":"2026-09-27T13:46:11","guid":{"rendered":"https:\/\/www.diyipcb.com\/?p=1917"},"modified":"2026-09-27T13:46:11","modified_gmt":"2026-09-27T13:46:11","slug":"pth-vs-npth-pcb-holes","status":"publish","type":"post","link":"https:\/\/www.diyipcb.com\/ja\/pth-vs-npth-pcb-holes\/","title":{"rendered":"PTH \u5bfe NPTH\uff1a\u5f53\u3066\u63a8\u91cf\u306a\u3057\u3067PCB\u306e\u7a74\u3092\u6307\u5b9a\u3059\u308b"},"content":{"rendered":"<div class=\"diyi-article\">\n<p class=\"dn-summary\">A hole used for a screw and a hole used for a component lead can look similar in a preview while requiring different fabrication treatment. PTH means plated through hole; NPTH means non-plated through hole. State the intended treatment explicitly instead of expecting the manufacturer to infer it from the drawing.<\/p>\n<nav class=\"dn-toc\" aria-label=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\"><strong>\u3053\u306e\u8a18\u4e8b\u3067\u306f<\/strong><\/p>\n<ul>\n<li><a href=\"#section-1\">Decide what each hole must do<\/a><\/li>\n<li><a href=\"#section-2\">Specify the finished feature<\/a><\/li>\n<li><a href=\"#section-3\">Make the drill package unambiguous<\/a><\/li>\n<li><a href=\"#section-4\">Resolve conflicts before release<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 id=\"section-1\">Decide what each hole must do<\/h2>\n<p>Group holes by function: component leads, electrical vias, locating pins and mechanical fasteners. A mounting hole is not automatically NPTH; some designs intentionally connect mounting hardware to a net. That connection is an electrical design decision and should be visible in the source layout and supporting drawing.<\/p>\n<p>Eurocircuits&#x27; drilled-hole guidelines distinguish plated holes, non-plated holes and vias, and describe using separate drill outputs for PTH and NPTH. Its tool adjustments and tolerances apply to its own process. For a DIYIPCB order, request confirmation of the applicable finished-hole tolerance for critical fits.<\/p>\n<h2 id=\"section-2\">Specify the finished feature<\/h2>\n<p>A connector must fit the finished hole after manufacturing. Record the required finished diameter, its allowed tolerance and any mating-part constraints. Do not enlarge the CAD hole by an assumed plating allowance without discussing the convention with the fabricator; that can apply compensation twice.<\/p>\n<p>For an illustrative connector review, list the maximum lead dimensions from the exact package drawing, the intended hole specification and the required insertion clearance. Leave a visible unresolved item if those dimensions do not establish a reliable fit. A nominal lead diameter alone is not enough to accept the footprint.<\/p>\n<h2 id=\"section-3\">Make the drill package unambiguous<\/h2>\n<ul>\n<li>Export PTH and NPTH separately when the CAD workflow supports it.<\/li>\n<li>Name files clearly and include a short drill legend.<\/li>\n<li>Highlight press-fit or otherwise critical holes on a dimensioned drawing.<\/li>\n<li>Identify mechanical holes that intentionally connect to copper.<\/li>\n<li>Verify the drill overlay against pads and the board contour.<\/li>\n<\/ul>\n<h2 id=\"section-4\">Resolve conflicts before release<\/h2>\n<p>If the drawing says NPTH while the drill data identifies a plated feature, revise the package so both agree. A note in a purchase message should not become a permanent substitute for corrected source data. Keep the accepted hole specification with the release, especially when changing connectors or reordering from a different fabrication process.<\/p>\n<div class=\"dn-cta\">\n<p>\u300c\u300d\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <a href=\"\/ja\/docs\/board-specifications\/\">\u95a2\u9023\u30d5\u30a1\u30a4\u30eb\u304a\u3088\u3073\u767a\u6ce8\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a> \u5f15\u304d\u7d99\u304e\u306e\u6e96\u5099\u3092\u3059\u308b\u306b\u306f\u3001\u307e\u305a <a href=\"\/ja\/product\/pcb-pcba-order-online\/\">DIYIPCB\u306b\u898b\u7a4d\u3082\u308a\u3092\u4f9d\u983c\u3059\u308b<\/a>. \u5be9\u67fb\u7528\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u306f\u3001\u7279\u5225\u306a\u8981\u4ef6\u3082\u4f75\u305b\u3066\u6dfb\u4ed8\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<\/div>\n<p class=\"dn-source\">\u6280\u8853\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\uff1a <a href=\"https:\/\/www.eurocircuits.com\/technical-guidelines\/pcb-design-guidelines\/drilled-holes\/\" target=\"_blank\" rel=\"noopener noreferrer\">Eurocircuits: drilled-hole definitions<\/a>. \u53c2\u7167\u8cc7\u6599\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u30b5\u30d7\u30e9\u30a4\u30e4\u30fc\u56fa\u6709\u306e\u5de5\u7a0b\u9650\u754c\u5024\u306f\u3001DIYIPCB\u306e\u88fd\u9020\u4e0a\u306e\u78ba\u7d04\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Understand plated and non-plated PCB holes, document finished sizes, and prevent mounting or connector holes from being misinterpreted.<\/p>","protected":false},"author":1,"featured_media":1173,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[92],"tags":[],"class_list":["post-1917","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pcb-insights"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.diyipcb.com\/wp-content\/uploads\/2026\/09\/plate1-1788258188.webp","_links":{"self":[{"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/posts\/1917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/comments?post=1917"}],"version-history":[{"count":0,"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/posts\/1917\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/media\/1173"}],"wp:attachment":[{"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/media?parent=1917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/categories?post=1917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.diyipcb.com\/ja\/wp-json\/wp\/v2\/tags?post=1917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}