{"id":6286,"date":"2026-04-30T14:59:45","date_gmt":"2026-04-30T06:59:45","guid":{"rendered":"https:\/\/txjpcba.com\/?p=6286"},"modified":"2026-04-30T14:59:45","modified_gmt":"2026-04-30T06:59:45","slug":"what-is-aoi-inspection-in-pcb-assembly","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/sv\/what-is-aoi-inspection-in-pcb-assembly\/","title":{"rendered":"What is AOI inspection in PCB assembly?"},"content":{"rendered":"<h2 data-start=\"0\" data-end=\"43\"><strong data-start=\"0\" data-end=\"43\">AOI Inspection in PCB Assembly<\/strong><\/h2>\n<p data-start=\"45\" data-end=\"357\"><strong data-start=\"45\" data-end=\"83\">AOI (automatiserad optisk inspektion)<\/strong> is a critical quality control process in <a href=\"https:\/\/txjpcba.com\/sv\/kretskortsmontering\/\"><strong data-start=\"125\" data-end=\"141\">Montering av kretskort<\/strong><\/a>, especially in modern <strong data-start=\"164\" data-end=\"180\">SMT-montering<\/strong> lines. It uses high-resolution cameras and intelligent software to automatically inspect printed circuit boards for defects after solder paste printing and component placement.<\/p>\n<p data-start=\"359\" data-end=\"455\">AOI helps manufacturers detect errors early, reduce rework, and ensure high product reliability.<\/p>\n<figure id=\"attachment_6287\" aria-describedby=\"caption-attachment-6287\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-6287\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-AOI-inspection-in-PCB-assembly.jpg\" alt=\"What is AOI inspection in PCB assembly\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-AOI-inspection-in-PCB-assembly.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-AOI-inspection-in-PCB-assembly-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-AOI-inspection-in-PCB-assembly-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-AOI-inspection-in-PCB-assembly-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-6287\" class=\"wp-caption-text\">What is AOI inspection in PCB assembly<\/figcaption><\/figure>\n<h2 data-section-id=\"197lt33\" data-start=\"457\" data-end=\"488\">What Does AOI Inspection Do?<\/h2>\n<p data-start=\"490\" data-end=\"612\">AOI systems scan the PCB and compare it against a reference (design data or a \u201cgolden board\u201d) to identify defects such as:<\/p>\n<ul data-start=\"614\" data-end=\"836\">\n<li data-section-id=\"1ybd368\" data-start=\"614\" data-end=\"636\">Saknade komponenter<\/li>\n<li data-section-id=\"1k2jv4j\" data-start=\"637\" data-end=\"673\">Misaligned or shifted components<\/li>\n<li data-section-id=\"9qw1c6\" data-start=\"674\" data-end=\"727\">Incorrect component orientation (polarity errors)<\/li>\n<li data-section-id=\"ar4ek4\" data-start=\"728\" data-end=\"763\">Solder bridges (short circuits)<\/li>\n<li data-section-id=\"5mmkh6\" data-start=\"764\" data-end=\"800\">Insufficient or excessive solder<\/li>\n<li data-section-id=\"nqye7l\" data-start=\"801\" data-end=\"836\">Tombstoning (lifted components)<\/li>\n<\/ul>\n<p data-start=\"838\" data-end=\"903\">\ud83d\udc49 This makes AOI an essential step in high-quality PCB Assembly.<\/p>\n<p align=\"center\"><a href=\"\/sv\/fa-en-offert-pa-kretskortsmontering\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">F\u00e5 en offert p\u00e5 PCB-montering<\/button><\/a><\/p>\n<h2 data-section-id=\"beznl\" data-start=\"905\" data-end=\"941\">Where AOI is Used in SMT Assembly<\/h2>\n<p data-start=\"943\" data-end=\"992\">AOI inspection can be applied at multiple stages:<\/p>\n<h3 data-section-id=\"1oz7srn\" data-start=\"994\" data-end=\"1031\">Post-Solder Paste AOI (SPI + AOI)<\/h3>\n<ul data-start=\"1033\" data-end=\"1111\">\n<li data-section-id=\"rbynqv\" data-start=\"1033\" data-end=\"1076\">Checks solder paste position and volume<\/li>\n<li data-section-id=\"loi760\" data-start=\"1077\" data-end=\"1111\">Detects printing defects early<\/li>\n<\/ul>\n<h3 data-section-id=\"vqtbh9\" data-start=\"1113\" data-end=\"1135\">Post-Placement AOI<\/h3>\n<ul data-start=\"1137\" data-end=\"1229\">\n<li data-section-id=\"g9ms63\" data-start=\"1137\" data-end=\"1182\">Verifies component presence and alignment<\/li>\n<li data-section-id=\"1ityfu4\" data-start=\"1183\" data-end=\"1229\">Ensures correct placement before soldering<\/li>\n<\/ul>\n<h3 data-section-id=\"18ny2rc\" data-start=\"1231\" data-end=\"1264\">Post-Reflow AOI (Most Common)<\/h3>\n<ul data-start=\"1266\" data-end=\"1332\">\n<li data-section-id=\"1t2mox3\" data-start=\"1266\" data-end=\"1298\">Inspects final solder joints<\/li>\n<li data-section-id=\"r0pq5d\" data-start=\"1299\" data-end=\"1332\">Detects most assembly defects<\/li>\n<\/ul>\n<p data-start=\"1334\" data-end=\"1403\">\ud83d\udc49 Post-reflow AOI is the most widely used stage in <strong data-start=\"1386\" data-end=\"1402\">SMT-montering<\/strong>.<\/p>\n<h2 data-section-id=\"1xz03j2\" data-start=\"1405\" data-end=\"1432\">How AOI Inspection Works<\/h2>\n<p data-start=\"1434\" data-end=\"1460\">AOI systems operate using:<\/p>\n<ul data-start=\"1462\" data-end=\"1588\">\n<li data-section-id=\"h5zknm\" data-start=\"1462\" data-end=\"1500\">High-resolution cameras (2D or 3D)<\/li>\n<li data-section-id=\"y77gfm\" data-start=\"1501\" data-end=\"1556\">Controlled lighting (LED, multi-angle illumination)<\/li>\n<li data-section-id=\"873k7s\" data-start=\"1557\" data-end=\"1588\">Image processing algorithms<\/li>\n<\/ul>\n<p data-start=\"1590\" data-end=\"1601\">The system:<\/p>\n<ol data-start=\"1603\" data-end=\"1710\">\n<li data-section-id=\"k8g3vc\" data-start=\"1603\" data-end=\"1634\">Captures images of the PCB<\/li>\n<li data-section-id=\"1q8rb5s\" data-start=\"1635\" data-end=\"1673\">Compares them with reference data<\/li>\n<li data-section-id=\"1l5ree2\" data-start=\"1674\" data-end=\"1710\">Flags any deviations or defects<\/li>\n<\/ol>\n<p data-start=\"1712\" data-end=\"1777\">Advanced AOI systems can also use AI for better defect detection.<\/p>\n<h2 data-section-id=\"1u65n7a\" data-start=\"1779\" data-end=\"1802\">Types of AOI Systems<\/h2>\n<h3 data-section-id=\"6p6oaf\" data-start=\"1804\" data-end=\"1814\">2D AOI<\/h3>\n<ul data-start=\"1816\" data-end=\"1882\">\n<li data-section-id=\"h48ee9\" data-start=\"1816\" data-end=\"1841\">Uses standard imaging<\/li>\n<li data-section-id=\"1segjhc\" data-start=\"1842\" data-end=\"1867\">Detects basic defects<\/li>\n<li data-section-id=\"u6f4ps\" data-start=\"1868\" data-end=\"1882\">Lower cost<\/li>\n<\/ul>\n<h3 data-section-id=\"4u6s0m\" data-start=\"1884\" data-end=\"1894\">3D AOI<\/h3>\n<ul data-start=\"1896\" data-end=\"2010\">\n<li data-section-id=\"ao4h28\" data-start=\"1896\" data-end=\"1947\">Measures height and volume (e.g., solder paste)<\/li>\n<li data-section-id=\"15ud22s\" data-start=\"1948\" data-end=\"1975\">More accurate detection<\/li>\n<li data-section-id=\"1uo48ah\" data-start=\"1976\" data-end=\"2010\">Ideal for complex PCB Assembly<\/li>\n<\/ul>\n<h2 data-section-id=\"1dh3grx\" data-start=\"2012\" data-end=\"2043\">Advantages of AOI Inspection<\/h2>\n<ul data-start=\"2045\" data-end=\"2212\">\n<li data-section-id=\"a293zj\" data-start=\"2045\" data-end=\"2080\">High-speed automatic inspection<\/li>\n<li data-section-id=\"vu6yis\" data-start=\"2081\" data-end=\"2118\">Konsekventa och repeterbara resultat<\/li>\n<li data-section-id=\"zm28k1\" data-start=\"2119\" data-end=\"2145\">Early defect detection<\/li>\n<li data-section-id=\"1kvnrhf\" data-start=\"2146\" data-end=\"2180\">Reduced manual inspection cost<\/li>\n<li data-section-id=\"1uo2ce7\" data-start=\"2181\" data-end=\"2212\">Improved SMT Assembly yield<\/li>\n<\/ul>\n<h2 data-section-id=\"dtssi8\" data-start=\"2214\" data-end=\"2235\">Limitations of AOI<\/h2>\n<p data-start=\"2237\" data-end=\"2278\">While powerful, AOI has some limitations:<\/p>\n<ul data-start=\"2280\" data-end=\"2407\">\n<li data-section-id=\"15cc4st\" data-start=\"2280\" data-end=\"2333\">Cannot see hidden solder joints (e.g., under BGA)<\/li>\n<li data-section-id=\"19bpf36\" data-start=\"2334\" data-end=\"2365\">May produce false positives<\/li>\n<li data-section-id=\"kvdz3d\" data-start=\"2366\" data-end=\"2407\">Requires proper programming and setup<\/li>\n<\/ul>\n<p data-start=\"2409\" data-end=\"2477\">\ud83d\udc49 For hidden defects, X-ray inspection is often used alongside AOI.<\/p>\n<h2 data-section-id=\"1qg3ybn\" data-start=\"2479\" data-end=\"2506\">AOI vs Manual Inspection<\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2508\" data-end=\"2773\">\n<thead data-start=\"2508\" data-end=\"2556\">\n<tr data-start=\"2508\" data-end=\"2556\">\n<th class=\"\" data-start=\"2508\" data-end=\"2518\" data-col-size=\"sm\">Funktion<\/th>\n<th class=\"\" data-start=\"2518\" data-end=\"2535\" data-col-size=\"sm\">AOI Inspection<\/th>\n<th class=\"\" data-start=\"2535\" data-end=\"2556\" data-col-size=\"sm\">Manual Inspection<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2603\" data-end=\"2773\">\n<tr data-start=\"2603\" data-end=\"2631\">\n<td data-start=\"2603\" data-end=\"2611\" data-col-size=\"sm\">Hastighet<\/td>\n<td data-start=\"2611\" data-end=\"2623\" data-col-size=\"sm\">Mycket snabb<\/td>\n<td data-start=\"2623\" data-end=\"2631\" data-col-size=\"sm\">Slow<\/td>\n<\/tr>\n<tr data-start=\"2632\" data-end=\"2673\">\n<td data-start=\"2632\" data-end=\"2643\" data-col-size=\"sm\">Accuracy<\/td>\n<td data-start=\"2643\" data-end=\"2650\" data-col-size=\"sm\">H\u00f6g<\/td>\n<td data-start=\"2650\" data-end=\"2673\" data-col-size=\"sm\">Depends on operator<\/td>\n<\/tr>\n<tr data-start=\"2674\" data-end=\"2712\">\n<td data-start=\"2674\" data-end=\"2688\" data-col-size=\"sm\">Samst\u00e4mmighet<\/td>\n<td data-start=\"2688\" data-end=\"2700\" data-col-size=\"sm\">Utm\u00e4rkt<\/td>\n<td data-start=\"2700\" data-end=\"2712\" data-col-size=\"sm\">Variable<\/td>\n<\/tr>\n<tr data-start=\"2713\" data-end=\"2773\">\n<td data-start=\"2713\" data-end=\"2720\" data-col-size=\"sm\">Kostnad<\/td>\n<td data-start=\"2720\" data-end=\"2742\" data-col-size=\"sm\">Higher initial cost<\/td>\n<td data-start=\"2742\" data-end=\"2773\" data-col-size=\"sm\">Higher long-term labor cost<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2775\" data-end=\"2837\">AOI is now standard in most <strong data-start=\"2803\" data-end=\"2819\">Montering av kretskort<\/strong> produktionslinjer.<\/p>\n<h2 data-section-id=\"1t8ozdc\" data-start=\"2839\" data-end=\"2878\">Why AOI is Important in PCB Assembly<\/h2>\n<p data-start=\"2880\" data-end=\"2901\">AOI inspection helps:<\/p>\n<ul data-start=\"2903\" data-end=\"3051\">\n<li data-section-id=\"uc0ti7\" data-start=\"2903\" data-end=\"2942\">Detect defects early in the process<\/li>\n<li data-section-id=\"zxrpgm\" data-start=\"2943\" data-end=\"2970\">Reduce rework and scrap<\/li>\n<li data-section-id=\"ok5i6n\" data-start=\"2971\" data-end=\"3014\">Improve product quality and reliability<\/li>\n<li data-section-id=\"1wsn2lr\" data-start=\"3015\" data-end=\"3051\">Lower overall manufacturing cost<\/li>\n<\/ul>\n<p data-start=\"3053\" data-end=\"3116\">\ud83d\udc49 It is a key step in modern <a href=\"https:\/\/txjpcba.com\/sv\/smt-monteringstjanster\/\"><strong data-start=\"3083\" data-end=\"3099\">SMT-montering<\/strong><\/a> kvalitetskontroll.<\/p>\n<h2 data-section-id=\"1s1lag3\" data-start=\"3118\" data-end=\"3158\">Best Practices for AOI Implementation<\/h2>\n<ul data-start=\"3160\" data-end=\"3346\">\n<li data-section-id=\"1k545ce\" data-start=\"3160\" data-end=\"3213\">Use AOI at multiple stages (pre- and post-reflow)<\/li>\n<li data-section-id=\"1quf7or\" data-start=\"3214\" data-end=\"3255\">Combine with SPI and X-ray inspection<\/li>\n<li data-section-id=\"17atcdr\" data-start=\"3256\" data-end=\"3296\">Regularly update inspection programs<\/li>\n<li data-section-id=\"e267nc\" data-start=\"3297\" data-end=\"3346\">Train operators to review results effectively<\/li>\n<\/ul>\n<h2 data-section-id=\"8dtpi\" data-start=\"3348\" data-end=\"3361\">Slutsats<\/h2>\n<p data-start=\"3363\" data-end=\"3655\">AOI inspection is an essential part of <strong data-start=\"3402\" data-end=\"3418\">Montering av kretskort<\/strong> och <strong data-start=\"3423\" data-end=\"3439\">SMT-montering<\/strong>, providing fast and accurate detection of defects throughout the manufacturing process. By automating inspection, manufacturers can ensure consistent quality, reduce errors, and deliver reliable electronic products.<\/p>\n<p align=\"center\"><a href=\"\/sv\/fa-en-offert-pa-kretskortsmontering\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">F\u00e5 en offert p\u00e5 PCB-montering<\/button><\/a><\/p>\n<p style=\"text-align: center;\">Need support with BOM and component sourcing? Start by requesting a quote.<br \/>\nVi erbjuder professionella tj\u00e4nster f\u00f6r PCB-montering, inklusive SMT, DIP och kompletta nyckelf\u00e4rdiga l\u00f6sningar.<\/p>\n<p style=\"text-align: center;\">\u2714 NDA tillg\u00e4ngligt \u2714 Snabb offert inom 24 timmar \u2714 ISO-certifierad fabrik \u2714 One-stop PCB &amp; PCBA Service<\/p>","protected":false},"excerpt":{"rendered":"<p>AOI Inspection in PCB Assembly AOI (Automated Optical Inspection) is a critical quality control process in PCB Assembly, especially in [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6287,"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":""}},"footnotes":""},"categories":[71,445],"tags":[1193,1194,1198,1196,1199,1197,1200,1201,1165,1195],"class_list":["post-6286","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faqs","category-pcb-assembly-faqs","tag-aoi-inspection-in-pcb-assembly","tag-aoi-inspection-pcb-assembly","tag-aoi-machine-pcb","tag-automated-optical-inspection-pcba","tag-electronics-quality-control","tag-pcb-defect-detection","tag-pcb-pth","tag-pcb-smd-assembly","tag-quick-turn-pcb-assembly","tag-smt-assembly-inspection"],"_links":{"self":[{"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/posts\/6286","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/comments?post=6286"}],"version-history":[{"count":1,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/posts\/6286\/revisions"}],"predecessor-version":[{"id":6288,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/posts\/6286\/revisions\/6288"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/media\/6287"}],"wp:attachment":[{"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/media?parent=6286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/categories?post=6286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/txjpcba.com\/sv\/wp-json\/wp\/v2\/tags?post=6286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}