{"id":6550,"date":"2026-05-13T14:45:31","date_gmt":"2026-05-13T06:45:31","guid":{"rendered":"https:\/\/txjpcba.com\/?p=6550"},"modified":"2026-05-13T14:45:31","modified_gmt":"2026-05-13T06:45:31","slug":"what-is-aoi-vs-ict-testing","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/ko\/what-is-aoi-vs-ict-testing\/","title":{"rendered":"What is AOI vs ICT testing?"},"content":{"rendered":"<h2 data-section-id=\"tqrfi4\" data-start=\"0\" data-end=\"28\">AOI vs ICT testing<\/h2>\n<p data-start=\"53\" data-end=\"299\">Automated Optical Inspection (AOI) is a visual inspection method used in <a href=\"https:\/\/txjpcba.com\/ko\/pcb-%ec%96%b4%ec%85%88%eb%b8%94%eb%a6%ac\/\"><strong>PCB \uc5b4\uc148\ube14\ub9ac<\/strong><\/a> to detect surface-level defects. It relies on high-resolution cameras and image processing software to scan the board and compare it against a reference design.<\/p>\n<p data-start=\"301\" data-end=\"458\">AOI is widely used in SMT Assembly both before and after reflow soldering to ensure components are placed correctly and solder joints meet quality standards.<\/p>\n<p data-start=\"460\" data-end=\"475\">AOI can detect:<\/p>\n<ul data-start=\"476\" data-end=\"603\">\n<li data-section-id=\"165njda\" data-start=\"476\" data-end=\"507\">Missing or wrong components<\/li>\n<li data-section-id=\"vkd96v\" data-start=\"508\" data-end=\"527\">Polarity errors<\/li>\n<li data-section-id=\"6cjuaa\" data-start=\"528\" data-end=\"560\">Misalignment or skewed parts<\/li>\n<li data-section-id=\"1a6b576\" data-start=\"561\" data-end=\"603\">Solder bridges and insufficient solder<\/li>\n<\/ul>\n<p data-start=\"605\" data-end=\"699\">Because it is fast and non-contact, AOI is ideal for high-speed SMT Assembly production lines.<\/p>\n<figure id=\"attachment_6551\" aria-describedby=\"caption-attachment-6551\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-6551\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-AOI-vs-ICT-testing.jpg\" alt=\"What is AOI vs ICT testing\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-AOI-vs-ICT-testing.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-AOI-vs-ICT-testing-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-AOI-vs-ICT-testing-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-AOI-vs-ICT-testing-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-6551\" class=\"wp-caption-text\">What is AOI vs ICT testing<\/figcaption><\/figure>\n<h2 data-section-id=\"ae8gwt\" data-start=\"701\" data-end=\"723\">What is ICT testing<\/h2>\n<p data-start=\"724\" data-end=\"905\">In-Circuit Testing (ICT) is an electrical testing method used after PCB Assembly is completed. It verifies the performance of individual components and the integrity of the circuit.<\/p>\n<p data-start=\"907\" data-end=\"1012\">ICT uses a test fixture with multiple probes (bed-of-nails) that contact specific test points on the PCB.<\/p>\n<p data-start=\"1014\" data-end=\"1029\">ICT can detect:<\/p>\n<ul data-start=\"1030\" data-end=\"1154\">\n<li data-section-id=\"8w0lxh\" data-start=\"1030\" data-end=\"1066\">Short circuits and open circuits<\/li>\n<li data-section-id=\"7ze2di\" data-start=\"1067\" data-end=\"1097\">Incorrect component values<\/li>\n<li data-section-id=\"9u6d6d\" data-start=\"1098\" data-end=\"1130\">Faulty or damaged components<\/li>\n<li data-section-id=\"uqfmzr\" data-start=\"1131\" data-end=\"1154\">Connectivity issues<\/li>\n<\/ul>\n<p data-start=\"1156\" data-end=\"1334\">Unlike AOI, ICT does not rely on visual inspection. Instead, it directly measures electrical behavior, making it highly accurate for functional validation at the component level.<\/p>\n<p align=\"center\"><a href=\"\/ko\/pcb-%ec%96%b4%ec%85%88%eb%b8%94%eb%a6%ac-%ea%b2%ac%ec%a0%81-%eb%b0%9b%ea%b8%b0\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">PCB \uc5b4\uc148\ube14\ub9ac \uacac\uc801 \ubc1b\uae30<\/button><\/a><\/p>\n<h2 data-section-id=\"hv9owe\" data-start=\"1336\" data-end=\"1374\">Key differences between AOI and ICT<\/h2>\n<p data-start=\"1375\" data-end=\"1490\">AOI and ICT serve different purposes in PCB Assembly and are often used together for comprehensive quality control.<\/p>\n<p data-start=\"1492\" data-end=\"1521\">The main differences include:<\/p>\n<ul data-start=\"1523\" data-end=\"2234\">\n<li data-section-id=\"1o9ff8c\" data-start=\"1523\" data-end=\"1626\"><strong data-start=\"1525\" data-end=\"1544\">Inspection type<\/strong><br data-start=\"1544\" data-end=\"1547\" \/>AOI is a visual inspection method, while ICT is an electrical testing method.<\/li>\n<li data-section-id=\"ecvgz5\" data-start=\"1628\" data-end=\"1776\"><strong data-start=\"1630\" data-end=\"1647\">Testing stage<\/strong><br data-start=\"1647\" data-end=\"1650\" \/>AOI is typically used during SMT Assembly (before and after reflow), while ICT is used after full PCB Assembly is completed.<\/li>\n<li data-section-id=\"1a4dr4i\" data-start=\"1778\" data-end=\"1956\"><strong data-start=\"1780\" data-end=\"1800\">Defect detection<\/strong><br data-start=\"1800\" data-end=\"1803\" \/>AOI identifies visible defects such as placement and soldering issues, while ICT detects electrical faults such as shorts, opens, and incorrect values.<\/li>\n<li data-section-id=\"4e7lqm\" data-start=\"1958\" data-end=\"2095\"><strong data-start=\"1960\" data-end=\"1985\">Equipment requirement<\/strong><br data-start=\"1985\" data-end=\"1988\" \/>AOI uses cameras and software, whereas ICT requires dedicated fixtures and physical contact with the PCB.<\/li>\n<li data-section-id=\"tkfldb\" data-start=\"2097\" data-end=\"2234\"><strong data-start=\"2099\" data-end=\"2124\">Speed and flexibility<\/strong><br data-start=\"2124\" data-end=\"2127\" \/>AOI is faster and easier to set up, while ICT requires more preparation but provides deeper verification.<\/li>\n<\/ul>\n<h2 data-section-id=\"178sn5p\" data-start=\"2236\" data-end=\"2270\">When to use AOI in SMT Assembly<\/h2>\n<p data-start=\"2271\" data-end=\"2379\">AOI is essential during <a href=\"https:\/\/txjpcba.com\/ko\/smt-%ec%96%b4%ec%85%88%eb%b8%94%eb%a6%ac-%ec%84%9c%eb%b9%84%ec%8a%a4\/\"><strong>SMT \uc5b4\uc148\ube14\ub9ac<\/strong><\/a> because it allows manufacturers to detect defects early in the process.<\/p>\n<p data-start=\"2381\" data-end=\"2401\">It is commonly used:<\/p>\n<ul data-start=\"2402\" data-end=\"2511\">\n<li data-section-id=\"1a4fcq6\" data-start=\"2402\" data-end=\"2454\">After solder paste printing (to check alignment)<\/li>\n<li data-section-id=\"175v7qi\" data-start=\"2455\" data-end=\"2484\">After component placement<\/li>\n<li data-section-id=\"o90pii\" data-start=\"2485\" data-end=\"2511\">After reflow soldering<\/li>\n<\/ul>\n<p data-start=\"2513\" data-end=\"2641\">By catching issues early, AOI reduces rework costs and prevents defective boards from moving further down the PCB Assembly line.<\/p>\n<h2 data-section-id=\"p6o6xr\" data-start=\"2643\" data-end=\"2677\">When to use ICT in PCB Assembly<\/h2>\n<p data-start=\"2678\" data-end=\"2754\">ICT is used when electrical accuracy and circuit integrity must be verified.<\/p>\n<p data-start=\"2756\" data-end=\"2772\">It is ideal for:<\/p>\n<ul data-start=\"2773\" data-end=\"2893\">\n<li data-section-id=\"e54vs9\" data-start=\"2773\" data-end=\"2812\">Mass production with stable designs<\/li>\n<li data-section-id=\"k3rj5v\" data-start=\"2813\" data-end=\"2842\">High-reliability products<\/li>\n<li data-section-id=\"6fqfjv\" data-start=\"2843\" data-end=\"2893\">Complex circuits requiring detailed validation<\/li>\n<\/ul>\n<p data-start=\"2895\" data-end=\"3033\">Although ICT setup takes time and cost, it provides deep insight into PCB Assembly quality and ensures each component functions correctly.<\/p>\n<h2 data-section-id=\"1957cer\" data-start=\"3035\" data-end=\"3055\">Advantages of AOI<\/h2>\n<p data-start=\"3056\" data-end=\"3100\">AOI offers several benefits in SMT Assembly:<\/p>\n<ul data-start=\"3102\" data-end=\"3281\">\n<li data-section-id=\"f2p4m6\" data-start=\"3102\" data-end=\"3154\">High-speed inspection suitable for large volumes<\/li>\n<li data-section-id=\"2nsxlq\" data-start=\"3155\" data-end=\"3201\">Non-contact testing with no risk of damage<\/li>\n<li data-section-id=\"zm28k1\" data-start=\"3202\" data-end=\"3228\">Early defect detection<\/li>\n<li data-section-id=\"1phfhzg\" data-start=\"3229\" data-end=\"3281\">Easy integration into automated production lines<\/li>\n<\/ul>\n<p data-start=\"3283\" data-end=\"3364\">However, AOI cannot detect hidden solder joints or electrical performance issues.<\/p>\n<h2 data-section-id=\"1957j0q\" data-start=\"3366\" data-end=\"3386\">Advantages of ICT<\/h2>\n<p data-start=\"3387\" data-end=\"3445\">ICT provides strong electrical validation in PCB Assembly:<\/p>\n<ul data-start=\"3447\" data-end=\"3568\">\n<li data-section-id=\"fneb3j\" data-start=\"3447\" data-end=\"3490\">Accurate detection of electrical faults<\/li>\n<li data-section-id=\"1qrbfxr\" data-start=\"3491\" data-end=\"3527\">Verification of component values<\/li>\n<li data-section-id=\"1h832wm\" data-start=\"3528\" data-end=\"3568\">High reliability for finished boards<\/li>\n<\/ul>\n<p data-start=\"3570\" data-end=\"3690\">The main limitation is that ICT requires test points and custom fixtures, which may increase cost and design complexity.<\/p>\n<h2 data-section-id=\"27eo4y\" data-start=\"3692\" data-end=\"3728\">Why AOI and ICT are used together<\/h2>\n<p data-start=\"3729\" data-end=\"3815\">In professional PCB Assembly, AOI and ICT are not alternatives\u2014they are complementary.<\/p>\n<p data-start=\"3817\" data-end=\"3967\">AOI ensures that the board is assembled correctly from a visual perspective, while ICT confirms that it works correctly from an electrical standpoint.<\/p>\n<p data-start=\"3969\" data-end=\"4014\">By combining both methods, manufacturers can:<\/p>\n<ul data-start=\"4015\" data-end=\"4152\">\n<li data-section-id=\"99qpkr\" data-start=\"4015\" data-end=\"4052\">Detect defects at multiple stages<\/li>\n<li data-section-id=\"1wmuzop\" data-start=\"4053\" data-end=\"4084\">Improve product reliability<\/li>\n<li data-section-id=\"18gcm8p\" data-start=\"4085\" data-end=\"4109\">Reduce failure rates<\/li>\n<li data-section-id=\"19f5k4r\" data-start=\"4110\" data-end=\"4152\">Ensure consistent SMT Assembly quality<\/li>\n<\/ul>\n<h2 data-section-id=\"8dtpi\" data-start=\"4154\" data-end=\"4167\">\uacb0\ub860<\/h2>\n<p data-start=\"4168\" data-end=\"4278\">AOI and ICT are two essential testing methods in PCB Assembly and SMT Assembly, each serving a unique purpose.<\/p>\n<p data-start=\"4280\" data-end=\"4544\">AOI focuses on visual inspection and early defect detection, while ICT verifies electrical performance and circuit integrity. Using both methods together creates a comprehensive quality control system that ensures reliable and high-performance electronic products.<\/p>\n<p align=\"center\"><a href=\"\/ko\/pcb-%ec%96%b4%ec%85%88%eb%b8%94%eb%a6%ac-%ea%b2%ac%ec%a0%81-%eb%b0%9b%ea%b8%b0\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">PCB \uc5b4\uc148\ube14\ub9ac \uacac\uc801 \ubc1b\uae30<\/button><\/a><\/p>\n<p style=\"text-align: center;\">\ud504\ub85c\ud1a0\ud0c0\uc785\ubd80\ud130 \ub300\ub7c9 \uc0dd\uc0b0\uae4c\uc9c0 \ubaa8\ub4e0 \uac83\uc744 \uc9c0\uc6d0\ud569\ub2c8\ub2e4. \uc9c0\uae08 PCB \uc5b4\uc148\ube14\ub9ac \uacac\uc801\uc744 \uc694\uccad\ud558\uc138\uc694.<br \/>\n\ub2f9\uc0ac\ub294 SMT, DIP \ubc0f \uc804\uccb4 \ud134\ud0a4 \uc194\ub8e8\uc158\uc744 \ud3ec\ud568\ud55c \uc804\ubb38 PCB \uc870\ub9bd \uc11c\ube44\uc2a4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n<p style=\"text-align: center;\">NDA \uac00\ub2a5 \u2714 24\uc2dc\uac04 \uc774\ub0b4 \ube60\ub978 \uacac\uc801 \u2714 ISO \uc778\uc99d \uacf5\uc7a5 \u2714 \uc6d0\uc2a4\ud1b1 PCB \ubc0f PCBA \uc11c\ube44\uc2a4<\/p>","protected":false},"excerpt":{"rendered":"<p>AOI vs ICT testing Automated Optical Inspection (AOI) is a visual inspection method used in PCB Assembly to detect surface-level [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6551,"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":[1666,1669,1670,1674,1668,1673,1671,1675,1667,1672],"class_list":["post-6550","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faqs","category-pcb-assembly-faqs","tag-aoi-vs-ict-pcb-testing","tag-automated-optical-inspection-vs-in-circuit-test","tag-electronics-testing-techniques-differences","tag-manufacturing-inspection-vs-testing-pcb","tag-pcb-assembly-inspection-methods-comparison","tag-pcb-electrical-test-methods","tag-pcba-defect-detection-methods","tag-pcba-validation-techniques","tag-smt-inspection-vs-electrical-testing","tag-smt-quality-control-testing-tools"],"_links":{"self":[{"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/posts\/6550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/comments?post=6550"}],"version-history":[{"count":2,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/posts\/6550\/revisions"}],"predecessor-version":[{"id":6553,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/posts\/6550\/revisions\/6553"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/media\/6551"}],"wp:attachment":[{"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/media?parent=6550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/categories?post=6550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/txjpcba.com\/ko\/wp-json\/wp\/v2\/tags?post=6550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}