{"id":6574,"date":"2026-05-14T10:20:00","date_gmt":"2026-05-14T02:20:00","guid":{"rendered":"https:\/\/txjpcba.com\/?p=6574"},"modified":"2026-05-14T10:20:00","modified_gmt":"2026-05-14T02:20:00","slug":"what-is-your-defect-rate","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/ja\/what-is-your-defect-rate\/","title":{"rendered":"What is your defect rate?"},"content":{"rendered":"<h2 data-section-id=\"1lqcz70\" data-start=\"0\" data-end=\"28\">Your defect rate<\/h2>\n<p data-start=\"30\" data-end=\"258\">Defect rate is one of the most important indicators of quality in <strong data-start=\"96\" data-end=\"112\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, <strong data-start=\"114\" data-end=\"130\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, \u305d\u3057\u3066 <strong data-start=\"136\" data-end=\"160\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>. It reflects how many boards or solder joints fail to meet quality standards during production.<\/p>\n<p data-start=\"260\" data-end=\"438\">A professional <a href=\"https:\/\/txjpcba.com\/ja\/%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e8%a3%bd%e9%80%a0\/\"><strong data-start=\"275\" data-end=\"296\">PCB\u88fd\u9020<\/strong><\/a> partner continuously works to minimize defect rates through strict process control, advanced equipment, and comprehensive inspection systems.<\/p>\n<figure id=\"attachment_6575\" aria-describedby=\"caption-attachment-6575\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-6575\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-your-defect-rate.jpg\" alt=\"What is your defect rate\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-your-defect-rate.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-your-defect-rate-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-your-defect-rate-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-your-defect-rate-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-6575\" class=\"wp-caption-text\">What is your defect rate<\/figcaption><\/figure>\n<h3 data-section-id=\"1bqwtyb\" data-start=\"440\" data-end=\"479\">Typical defect rate in PCB assembly<\/h3>\n<p data-start=\"481\" data-end=\"594\">In modern electronics manufacturing, defect rates are usually measured in <strong data-start=\"555\" data-end=\"593\">DPPM (Defective Parts Per Million)<\/strong>.<\/p>\n<p data-start=\"596\" data-end=\"624\">Typical industry benchmarks:<\/p>\n<ul data-start=\"626\" data-end=\"792\">\n<li data-section-id=\"1os7wyo\" data-start=\"626\" data-end=\"671\"><strong data-start=\"628\" data-end=\"654\">Standard manufacturers<\/strong>: 500\u20132000 DPPM<\/li>\n<li data-section-id=\"90lpwb\" data-start=\"672\" data-end=\"721\"><strong data-start=\"674\" data-end=\"705\">Advanced SMT Assembly lines<\/strong>: 100\u2013500 DPPM<\/li>\n<li data-section-id=\"b6iqgm\" data-start=\"722\" data-end=\"792\"><strong data-start=\"724\" data-end=\"776\">High-reliability production (automotive\/medical)<\/strong>: &lt;50\u2013100 DPPM<\/li>\n<\/ul>\n<p data-start=\"794\" data-end=\"969\">For well-controlled <a href=\"https:\/\/txjpcba.com\/ja\/%e3%82%bf%e3%83%bc%e3%83%b3%e3%82%ad%e3%83%bc-pcb-%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa\/\"><strong data-start=\"814\" data-end=\"838\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong><\/a>, defect rates are typically maintained below <strong data-start=\"884\" data-end=\"896\">500 DPPM<\/strong>, with many projects achieving even lower levels depending on complexity.<\/p>\n<p align=\"center\"><a href=\"\/ja\/%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa%e3%81%ae%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e5%8f%96%e3%82%8b\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea\u306e\u304a\u898b\u7a4d\u3082\u308a<\/button><\/a><\/p>\n<h3 data-section-id=\"ok7xqz\" data-start=\"971\" data-end=\"1004\">How defect rate is calculated<\/h3>\n<p data-start=\"1006\" data-end=\"1052\">Defect rate can be measured in different ways:<\/p>\n<p data-start=\"1054\" data-end=\"1140\"><strong data-start=\"1054\" data-end=\"1086\">Per Board (Unit Defect Rate)<\/strong><br data-start=\"1086\" data-end=\"1089\" \/>Percentage of defective PCBs out of total produced.<\/p>\n<p data-start=\"1142\" data-end=\"1280\"><strong data-start=\"1142\" data-end=\"1169\">Per Solder Joint (DPPM)<\/strong><br data-start=\"1169\" data-end=\"1172\" \/>More precise measurement, especially in <strong data-start=\"1212\" data-end=\"1228\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, where thousands of joints exist on a single board.<\/p>\n<p data-start=\"1282\" data-end=\"1367\"><strong data-start=\"1282\" data-end=\"1308\">First Pass Yield (FPY)<\/strong><br data-start=\"1308\" data-end=\"1311\" \/>Indicates how many boards pass all tests without rework.<\/p>\n<p data-start=\"1369\" data-end=\"1449\">These metrics together provide a complete view of <strong data-start=\"1419\" data-end=\"1440\">PCB\u88fd\u9020<\/strong> \u54c1\u8cea\u3060\u3002.<\/p>\n<h3 data-section-id=\"1sbmcqd\" data-start=\"1451\" data-end=\"1486\">Factors that affect defect rate<\/h3>\n<p data-start=\"1488\" data-end=\"1547\">Several factors influence defect rates in <strong data-start=\"1530\" data-end=\"1546\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>:<\/p>\n<p data-start=\"1549\" data-end=\"1657\"><strong data-start=\"1549\" data-end=\"1577\">Design Quality (DFM\/DFT)<\/strong><br data-start=\"1577\" data-end=\"1580\" \/>Poor PCB design can lead to soldering issues, misalignment, or test failures.<\/p>\n<p data-start=\"1659\" data-end=\"1743\"><strong data-start=\"1659\" data-end=\"1680\">Component Quality<\/strong><br data-start=\"1680\" data-end=\"1683\" \/>Low-quality or counterfeit components increase failure risk.<\/p>\n<p data-start=\"1745\" data-end=\"1871\"><strong data-start=\"1745\" data-end=\"1764\">Process Control<\/strong><br data-start=\"1764\" data-end=\"1767\" \/>Solder paste printing, placement accuracy, and reflow profiles directly impact <a href=\"https:\/\/txjpcba.com\/ja\/smt%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa%e3%83%bc%e3%82%b5%e3%83%bc%e3%83%93%e3%82%b9\/\"><strong data-start=\"1846\" data-end=\"1862\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong><\/a> \u54c1\u8cea\u3060\u3002.<\/p>\n<p data-start=\"1873\" data-end=\"1965\"><strong data-start=\"1873\" data-end=\"1896\">Equipment Precision<\/strong><br data-start=\"1896\" data-end=\"1899\" \/>High-end machines reduce placement errors and improve consistency.<\/p>\n<p data-start=\"1967\" data-end=\"2063\"><strong data-start=\"1967\" data-end=\"1985\">Operator Skill<\/strong><br data-start=\"1985\" data-end=\"1988\" \/>Experienced engineers ensure proper setup, inspection, and troubleshooting.<\/p>\n<h3 data-section-id=\"ega2mw\" data-start=\"2065\" data-end=\"2097\">How we minimize defect rates<\/h3>\n<p data-start=\"2099\" data-end=\"2195\">\u4fe1\u983c\u3067\u304d\u308b <strong data-start=\"2110\" data-end=\"2131\">PCB\u88fd\u9020<\/strong> provider uses multiple strategies to maintain low defect rates:<\/p>\n<p data-start=\"2197\" data-end=\"2292\"><strong data-start=\"2197\" data-end=\"2238\">Strict Incoming Quality Control (IQC)<\/strong><br data-start=\"2238\" data-end=\"2241\" \/>Ensures only qualified components enter production.<\/p>\n<p data-start=\"2294\" data-end=\"2386\"><strong data-start=\"2294\" data-end=\"2316\">Advanced Equipment<\/strong><br data-start=\"2316\" data-end=\"2319\" \/>High-speed, high-precision SMT machines improve placement accuracy.<\/p>\n<p data-start=\"2388\" data-end=\"2469\"><strong data-start=\"2388\" data-end=\"2412\">SPI + AOI Inspection<\/strong><br data-start=\"2412\" data-end=\"2415\" \/>Early detection of solder paste and placement defects.<\/p>\n<p data-start=\"2471\" data-end=\"2546\"><strong data-start=\"2471\" data-end=\"2491\">X\u7dda\u691c\u67fb<\/strong><br data-start=\"2491\" data-end=\"2494\" \/>Ensures hidden solder joints meet quality standards.<\/p>\n<p data-start=\"2548\" data-end=\"2651\"><strong data-start=\"2548\" data-end=\"2578\">ICT and Functional Testing<\/strong><br data-start=\"2578\" data-end=\"2581\" \/>Verifies electrical and functional performance after <a href=\"https:\/\/txjpcba.com\/ja\/pcb%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa\/\"><strong data-start=\"2634\" data-end=\"2650\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong><\/a>.<\/p>\n<p data-start=\"2653\" data-end=\"2746\"><strong data-start=\"2653\" data-end=\"2677\">Process Optimization<\/strong><br data-start=\"2677\" data-end=\"2680\" \/>Continuous improvement of reflow profiles and assembly parameters.<\/p>\n<h3 data-section-id=\"1781jo3\" data-start=\"2748\" data-end=\"2799\">Role of turnkey PCB assembly in quality control<\/h3>\n<p data-start=\"2801\" data-end=\"2871\">\u3067 <strong data-start=\"2804\" data-end=\"2828\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, defect rates are typically lower because:<\/p>\n<ul data-start=\"2873\" data-end=\"3049\">\n<li data-section-id=\"7vvqqi\" data-start=\"2873\" data-end=\"2929\">Component sourcing is controlled by the manufacturer<\/li>\n<li data-section-id=\"13wp764\" data-start=\"2930\" data-end=\"2966\">Supply chain risks are minimized<\/li>\n<li data-section-id=\"1k95hl4\" data-start=\"2967\" data-end=\"3015\">Processes are fully integrated and optimized<\/li>\n<li data-section-id=\"1qra759\" data-start=\"3016\" data-end=\"3049\">Traceability is more complete<\/li>\n<\/ul>\n<p data-start=\"3051\" data-end=\"3147\">This end-to-end control helps achieve consistent quality in <strong data-start=\"3111\" data-end=\"3127\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong> and final products.<\/p>\n<h3 data-section-id=\"1mv31s7\" data-start=\"3149\" data-end=\"3195\">Continuous improvement and quality targets<\/h3>\n<p data-start=\"3197\" data-end=\"3269\">Top manufacturers continuously monitor and improve defect rates through:<\/p>\n<ul data-start=\"3271\" data-end=\"3433\">\n<li data-section-id=\"18vqlku\" data-start=\"3271\" data-end=\"3308\">\u7d71\u8a08\u7684\u5de5\u7a0b\u7ba1\u7406\uff08SPC\uff09<\/li>\n<li data-section-id=\"tfkmk\" data-start=\"3309\" data-end=\"3338\">Root Cause Analysis (RCA)<\/li>\n<li data-section-id=\"1vi2s30\" data-start=\"3339\" data-end=\"3383\">Corrective and Preventive Actions (CAPA)<\/li>\n<li data-section-id=\"zrd8zo\" data-start=\"3384\" data-end=\"3433\">Regular equipment calibration and maintenance<\/li>\n<\/ul>\n<p data-start=\"3435\" data-end=\"3520\">The goal is not only to reduce defects but to approach <strong data-start=\"3490\" data-end=\"3519\">zero-defect manufacturing<\/strong>.<\/p>\n<h3 data-section-id=\"vzltcd\" data-start=\"3522\" data-end=\"3554\">What customers should expect<\/h3>\n<p data-start=\"3556\" data-end=\"3580\">Customers should expect:<\/p>\n<ul data-start=\"3582\" data-end=\"3736\">\n<li data-section-id=\"1miw98t\" data-start=\"3582\" data-end=\"3623\">Transparent reporting of defect rates<\/li>\n<li data-section-id=\"1yeb21s\" data-start=\"3624\" data-end=\"3661\">Clear quality metrics (DPPM, FPY)<\/li>\n<li data-section-id=\"1i5v2q5\" data-start=\"3662\" data-end=\"3694\">Continuous improvement plans<\/li>\n<li data-section-id=\"1pf1t0l\" data-start=\"3695\" data-end=\"3736\">Consistent performance across batches<\/li>\n<\/ul>\n<p data-start=\"3738\" data-end=\"3813\">For critical applications, even stricter targets can be defined in advance.<\/p>\n<h3 data-section-id=\"1079bb9\" data-start=\"3815\" data-end=\"3829\">\u7d50\u8ad6<\/h3>\n<p data-start=\"3831\" data-end=\"4010\">Defect rates in <strong data-start=\"3847\" data-end=\"3863\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, <strong data-start=\"3865\" data-end=\"3881\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, \u305d\u3057\u3066 <strong data-start=\"3887\" data-end=\"3911\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong> typically range from a few hundred to under 100 DPPM depending on quality level and application.<\/p>\n<p data-start=\"4012\" data-end=\"4210\">Through strict process control, advanced inspection, and integrated <strong data-start=\"4080\" data-end=\"4101\">PCB\u88fd\u9020<\/strong> systems, a professional manufacturer can deliver consistently low defect rates and high product reliability.<\/p>\n<p align=\"center\"><a href=\"\/ja\/%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa%e3%81%ae%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e5%8f%96%e3%82%8b\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea\u306e\u304a\u898b\u7a4d\u3082\u308a<\/button><\/a><\/p>\n<p style=\"text-align: center;\">\u30b3\u30b9\u30c8\u3068\u751f\u7523\u306e\u6700\u9069\u5316\u3092\u304a\u624b\u4f1d\u3044\u3057\u307e\u3059\u3002\u4eca\u3059\u3050PCB\u30a2\u30bb\u30f3\u30d6\u30ea\u306e\u304a\u898b\u7a4d\u3082\u308a\u3092\u3054\u4f9d\u983c\u304f\u3060\u3055\u3044\u3002.<br \/>\nSMT\u3001DIP\u3001\u30d5\u30eb\u30bf\u30fc\u30f3\u30ad\u30fc\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3080\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306aPCB\u30a2\u30bb\u30f3\u30d6\u30ea\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002.<\/p>\n<p style=\"text-align: center;\">\u5229\u7528\u3067\u304d\u308b NDA \u2714 24 \u6642\u9593\u4ee5\u5185\u306e\u901f\u3044\u5f15\u7528\u8a9e\u53e5 \u2714 ISO \u306b\u3088\u3063\u3066\u8a3c\u660e\u3055\u308c\u308b\u5de5\u5834 \u2714 \u30ef\u30f3\u30b9\u30c8\u30c3\u30d7 PCB \u53ca\u3073 PCBA \u30b5\u30fc\u30d3\u30b9<\/p>","protected":false},"excerpt":{"rendered":"<p>Your defect rate Defect rate is one of the most important indicators of quality in PCB Assembly, SMT Assembly, and [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6575,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[71,445],"tags":[1728,1733,1729,1724,1727,1732,1730,1725,1731,1726],"class_list":["post-6574","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faqs","category-pcb-assembly-faqs","tag-electronics-assembly-yield-rate","tag-electronics-manufacturing-defect-analysis","tag-first-pass-yield-pcb","tag-pcb-assembly-defect-rate","tag-pcb-manufacturing-defect-rate","tag-pcb-production-quality-standards","tag-pcb-quality-control-metrics","tag-smt-assembly-dppm-standards","tag-smt-defect-reduction-methods","tag-turnkey-pcb-assembly-quality-metrics"],"_links":{"self":[{"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/posts\/6574","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/comments?post=6574"}],"version-history":[{"count":1,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/posts\/6574\/revisions"}],"predecessor-version":[{"id":6576,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/posts\/6574\/revisions\/6576"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/media\/6575"}],"wp:attachment":[{"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/media?parent=6574"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/categories?post=6574"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/txjpcba.com\/ja\/wp-json\/wp\/v2\/tags?post=6574"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}