{"id":6309,"date":"2026-04-30T17:40:46","date_gmt":"2026-04-30T09:40:46","guid":{"rendered":"https:\/\/txjpcba.com\/?p=6309"},"modified":"2026-04-30T17:40:46","modified_gmt":"2026-04-30T09:40:46","slug":"what-is-double-sided-pcb-assembly","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/fr\/what-is-double-sided-pcb-assembly\/","title":{"rendered":"What is double-sided PCB assembly?"},"content":{"rendered":"<h2 data-start=\"0\" data-end=\"38\"><strong data-start=\"0\" data-end=\"38\">Double-Sided PCB Assembly<\/strong><\/h2>\n<p data-start=\"40\" data-end=\"450\"><strong data-start=\"40\" data-end=\"69\">Double-sided PCB Assembly<\/strong> refers to the process of mounting electronic components on <strong data-start=\"129\" data-end=\"143\">both sides<\/strong> of a printed circuit board. Unlike single-sided boards, this method utilizes the top and bottom layers of the PCB, allowing for higher component density and more complex circuit designs. It is widely used in modern <strong data-start=\"359\" data-end=\"375\">Assemblage du circuit imprim\u00e9<\/strong> et <strong data-start=\"380\" data-end=\"396\">Assemblage SMT<\/strong> for compact and high-performance electronic products.<\/p>\n<figure id=\"attachment_6310\" aria-describedby=\"caption-attachment-6310\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-6310\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-double-sided-PCB-assembly.jpg\" alt=\"What is double-sided PCB assembly\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-double-sided-PCB-assembly.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-double-sided-PCB-assembly-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-double-sided-PCB-assembly-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-double-sided-PCB-assembly-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-6310\" class=\"wp-caption-text\">What is double-sided PCB assembly<\/figcaption><\/figure>\n<h2 data-section-id=\"13vqhbx\" data-start=\"452\" data-end=\"482\">What is a Double-Sided PCB?<\/h2>\n<p data-start=\"484\" data-end=\"507\">A double-sided PCB has:<\/p>\n<ul data-start=\"509\" data-end=\"658\">\n<li data-section-id=\"1sdtd39\" data-start=\"509\" data-end=\"551\">Conductive copper layers on both sides<\/li>\n<li data-section-id=\"1samv2o\" data-start=\"552\" data-end=\"602\">Through-holes or vias connecting the two sides<\/li>\n<li data-section-id=\"rfuejb\" data-start=\"603\" data-end=\"658\">Component placement on both top and bottom surfaces<\/li>\n<\/ul>\n<p data-start=\"660\" data-end=\"734\">\ud83d\udc49 This structure enables more efficient use of space in <a href=\"https:\/\/txjpcba.com\/fr\/assemblage-de-circuits-imprimes\/\"><strong data-start=\"717\" data-end=\"733\">Assemblage du circuit imprim\u00e9<\/strong><\/a>.<\/p>\n<p align=\"center\"><a href=\"\/fr\/obtenir-un-devis-pour-lassemblage-de-circuits-imprimes\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">Obtenir un devis pour l'assemblage de circuits imprim\u00e9s<\/button><\/a><\/p>\n<h2 data-section-id=\"ozuarb\" data-start=\"736\" data-end=\"773\">Why Use Double-Sided PCB Assembly?<\/h2>\n<p data-start=\"775\" data-end=\"823\">Double-sided assembly offers several advantages:<\/p>\n<ul data-start=\"825\" data-end=\"953\">\n<li data-section-id=\"1hs11uu\" data-start=\"825\" data-end=\"853\">Densit\u00e9 de composants plus \u00e9lev\u00e9e<\/li>\n<li data-section-id=\"1u19y48\" data-start=\"854\" data-end=\"874\">Reduced PCB size<\/li>\n<li data-section-id=\"m1dtpu\" data-start=\"875\" data-end=\"907\">More complex circuit routing<\/li>\n<li data-section-id=\"1yqxs70\" data-start=\"908\" data-end=\"953\">Improved functionality in compact designs<\/li>\n<\/ul>\n<p data-start=\"955\" data-end=\"1022\">\ud83d\udc49 It is ideal for modern electronics that require miniaturization.<\/p>\n<h2 data-section-id=\"16pi72e\" data-start=\"1024\" data-end=\"1060\">Double-Sided PCB Assembly Process<\/h2>\n<p data-start=\"1062\" data-end=\"1153\">The process involves assembling components on both sides of the board, typically in stages:<\/p>\n<h3 data-section-id=\"3n65v\" data-start=\"1155\" data-end=\"1182\">First Side SMT Assembly<\/h3>\n<ul data-start=\"1184\" data-end=\"1323\">\n<li data-section-id=\"nyuqgg\" data-start=\"1184\" data-end=\"1227\">Solder paste printing on the first side<\/li>\n<li data-section-id=\"ugcgkf\" data-start=\"1228\" data-end=\"1281\">Component placement using pick-and-place machines<\/li>\n<li data-section-id=\"p9jcri\" data-start=\"1282\" data-end=\"1323\">Reflow soldering to secure components<\/li>\n<\/ul>\n<h3 data-section-id=\"yngqah\" data-start=\"1325\" data-end=\"1353\">Second Side SMT Assembly<\/h3>\n<ul data-start=\"1355\" data-end=\"1465\">\n<li data-section-id=\"psvn5t\" data-start=\"1355\" data-end=\"1373\">PCB is flipped<\/li>\n<li data-section-id=\"6c1dm6\" data-start=\"1374\" data-end=\"1420\">Solder paste is applied to the second side<\/li>\n<li data-section-id=\"9vv51u\" data-start=\"1421\" data-end=\"1465\">Components are placed and reflowed again<\/li>\n<\/ul>\n<p data-start=\"1467\" data-end=\"1572\">\ud83d\udc49 Adhesives or controlled profiles are used to prevent components from falling during the second reflow.<\/p>\n<h3 data-section-id=\"1j90e5d\" data-start=\"1574\" data-end=\"1621\">Through-Hole Component Insertion (Optional)<\/h3>\n<ul data-start=\"1623\" data-end=\"1726\">\n<li data-section-id=\"1wbgc0t\" data-start=\"1623\" data-end=\"1672\">Components inserted into plated through-holes<\/li>\n<li data-section-id=\"oywaw9\" data-start=\"1673\" data-end=\"1726\">Followed by wave soldering or selective soldering<\/li>\n<\/ul>\n<h3 data-section-id=\"xsngmd\" data-start=\"1728\" data-end=\"1754\">Inspection and Testing<\/h3>\n<ul data-start=\"1756\" data-end=\"1869\">\n<li data-section-id=\"4qh7f7\" data-start=\"1756\" data-end=\"1789\">AOI inspection for both sides<\/li>\n<li data-section-id=\"yo7oig\" data-start=\"1790\" data-end=\"1840\">X-ray inspection for hidden joints (if needed)<\/li>\n<li data-section-id=\"197zx4x\" data-start=\"1841\" data-end=\"1869\">Functional testing (FCT)<\/li>\n<\/ul>\n<h2 data-section-id=\"10mqyws\" data-start=\"1871\" data-end=\"1913\">Key Challenges in Double-Sided Assembly<\/h2>\n<ul data-start=\"1915\" data-end=\"2108\">\n<li data-section-id=\"1dtaxxf\" data-start=\"1915\" data-end=\"1975\">Preventing components from dropping during second reflow<\/li>\n<li data-section-id=\"hha9oq\" data-start=\"1976\" data-end=\"2032\">Managing thermal stress from multiple heating cycles<\/li>\n<li data-section-id=\"d1wbq2\" data-start=\"2033\" data-end=\"2076\">Ensuring proper alignment on both sides<\/li>\n<li data-section-id=\"lyiecf\" data-start=\"2077\" data-end=\"2108\">Handling heavier components<\/li>\n<\/ul>\n<h2 data-section-id=\"g34bjv\" data-start=\"2110\" data-end=\"2146\">Techniques to Improve Reliability<\/h2>\n<ul data-start=\"2148\" data-end=\"2353\">\n<li data-section-id=\"uny9wx\" data-start=\"2148\" data-end=\"2205\">Use of <strong data-start=\"2157\" data-end=\"2176\">glue dispensing<\/strong> for bottom-side components<\/li>\n<li data-section-id=\"1mzuwsk\" data-start=\"2206\" data-end=\"2247\">Optimized reflow temperature profiles<\/li>\n<li data-section-id=\"ihmodr\" data-start=\"2248\" data-end=\"2315\">Proper component placement strategy (heavier parts on top side)<\/li>\n<li data-section-id=\"n30yev\" data-start=\"2316\" data-end=\"2353\">Balanced design to reduce warping<\/li>\n<\/ul>\n<h2 data-section-id=\"1d3aq66\" data-start=\"2355\" data-end=\"2388\">Types of Double-Sided Assembly<\/h2>\n<h3 data-section-id=\"8si7sk\" data-start=\"2390\" data-end=\"2411\">SMT on Both Sides<\/h3>\n<ul data-start=\"2413\" data-end=\"2476\">\n<li data-section-id=\"3u8z4v\" data-start=\"2413\" data-end=\"2435\">Most common method<\/li>\n<li data-section-id=\"1y4w9zw\" data-start=\"2436\" data-end=\"2476\">Uses reflow soldering for both sides<\/li>\n<\/ul>\n<h3 data-section-id=\"dz5cw5\" data-start=\"2478\" data-end=\"2496\">Mixed Assembly<\/h3>\n<ul data-start=\"2498\" data-end=\"2566\">\n<li data-section-id=\"1vhrumb\" data-start=\"2498\" data-end=\"2526\">SMT on one or both sides<\/li>\n<li data-section-id=\"h5shk2\" data-start=\"2527\" data-end=\"2566\">Through-hole components added later<\/li>\n<\/ul>\n<p data-start=\"2568\" data-end=\"2632\">\ud83d\udc49 Mixed assembly is common in industrial and power electronics.<\/p>\n<h2 data-section-id=\"1ybf2xo\" data-start=\"2634\" data-end=\"2676\">Advantages of Double-Sided PCB Assembly<\/h2>\n<ul data-start=\"2678\" data-end=\"2838\">\n<li data-section-id=\"127xsv7\" data-start=\"2678\" data-end=\"2703\">Maximizes board space<\/li>\n<li data-section-id=\"p09196\" data-start=\"2704\" data-end=\"2736\">Reduces overall product size<\/li>\n<li data-section-id=\"1thvpk6\" data-start=\"2737\" data-end=\"2773\">Supports complex circuit designs<\/li>\n<li data-section-id=\"2jwo99\" data-start=\"2774\" data-end=\"2838\">Cost-effective compared to multilayer boards (in some cases)<\/li>\n<\/ul>\n<h2 data-section-id=\"bisuce\" data-start=\"2840\" data-end=\"2854\">Limites<\/h2>\n<ul data-start=\"2856\" data-end=\"2994\">\n<li data-section-id=\"17sztg6\" data-start=\"2856\" data-end=\"2894\">More complex manufacturing process<\/li>\n<li data-section-id=\"vdb01r\" data-start=\"2895\" data-end=\"2937\">Higher assembly cost than single-sided<\/li>\n<li data-section-id=\"1w320iz\" data-start=\"2938\" data-end=\"2994\">Increased risk of defects if not controlled properly<\/li>\n<\/ul>\n<h2 data-section-id=\"6o2xot\" data-start=\"2996\" data-end=\"3040\">Applications of Double-Sided PCB Assembly<\/h2>\n<ul data-start=\"3042\" data-end=\"3172\">\n<li data-section-id=\"146wsbr\" data-start=\"3042\" data-end=\"3066\">Electronique grand public<\/li>\n<li data-section-id=\"1x8ffoa\" data-start=\"3067\" data-end=\"3093\">\u00c9lectronique automobile<\/li>\n<li data-section-id=\"1um754u\" data-start=\"3094\" data-end=\"3124\">Syst\u00e8mes de contr\u00f4le industriel<\/li>\n<li data-section-id=\"1cyvddv\" data-start=\"3125\" data-end=\"3150\">Dispositifs de communication<\/li>\n<li data-section-id=\"kh47jd\" data-start=\"3151\" data-end=\"3172\">Medical equipment<\/li>\n<\/ul>\n<h2 data-section-id=\"11rkm4y\" data-start=\"3174\" data-end=\"3198\">Design Considerations<\/h2>\n<p data-start=\"3200\" data-end=\"3238\">To ensure successful <strong data-start=\"3221\" data-end=\"3237\">Assemblage du circuit imprim\u00e9<\/strong>:<\/p>\n<ul data-start=\"3240\" data-end=\"3448\">\n<li data-section-id=\"1hdgfa0\" data-start=\"3240\" data-end=\"3292\">Place heavier components on the first (top) side<\/li>\n<li data-section-id=\"2ra3f5\" data-start=\"3293\" data-end=\"3339\">Ensure adequate spacing between components<\/li>\n<li data-section-id=\"1h63ihz\" data-start=\"3340\" data-end=\"3371\">Add fiducials for alignment<\/li>\n<li data-section-id=\"1oga9bc\" data-start=\"3372\" data-end=\"3414\">Consider thermal balance during reflow<\/li>\n<li data-section-id=\"1a47qt5\" data-start=\"3415\" data-end=\"3448\">Follow DFM and DFA guidelines<\/li>\n<\/ul>\n<h2 data-section-id=\"1mtdqm1\" data-start=\"3450\" data-end=\"3473\">Role in PCB Assembly<\/h2>\n<p data-start=\"3475\" data-end=\"3675\">Double-sided PCB Assembly is a standard approach in modern <a href=\"https:\/\/txjpcba.com\/fr\/services-dassemblage-smt\/\"><strong data-start=\"3534\" data-end=\"3550\">Assemblage SMT<\/strong><\/a>, enabling manufacturers to build compact, high-performance electronic devices without significantly increasing board layers.<\/p>\n<h2 data-section-id=\"8dtpi\" data-start=\"3677\" data-end=\"3690\">Conclusion<\/h2>\n<p data-start=\"3692\" data-end=\"4018\">Double-sided PCB Assembly is a versatile and efficient method in <strong data-start=\"3757\" data-end=\"3773\">Assemblage du circuit imprim\u00e9<\/strong> et <strong data-start=\"3778\" data-end=\"3794\">Assemblage SMT<\/strong>, allowing components to be mounted on both sides of a board. While it introduces additional complexity, proper process control and design optimization ensure high reliability and performance in today\u2019s advanced electronics.<\/p>\n<p align=\"center\"><a href=\"\/fr\/obtenir-un-devis-pour-lassemblage-de-circuits-imprimes\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">Obtenir un devis pour l'assemblage de circuits imprim\u00e9s<\/button><\/a><\/p>\n<p style=\"text-align: center;\">Pr\u00eat \u00e0 d\u00e9marrer votre projet d'assemblage de circuits imprim\u00e9s ? Cliquez ci-dessous pour obtenir un devis rapide.<br \/>\nNous fournissons des services professionnels d'assemblage de circuits imprim\u00e9s, y compris SMT, DIP et des solutions compl\u00e8tes cl\u00e9 en main.<\/p>\n<p style=\"text-align: center;\">\u2714 NDA disponible \u2714 Devis rapide sous 24 heures \u2714 Usine certifi\u00e9e ISO \u2714 Service unique de PCB et PCBA<\/p>","protected":false},"excerpt":{"rendered":"<p>Double-Sided PCB Assembly Double-sided PCB Assembly refers to the process of mounting electronic components on both sides of a printed [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6310,"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":[1246,1243,1248,153,851,1245,104,1247,1244],"class_list":["post-6309","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faqs","category-pcb-assembly-faqs","tag-circuit-card-assembly-manufacturers","tag-double-sided-pcb-assembly","tag-electronic-pcb-assembly","tag-electronics-manufacturing","tag-mixed-pcb-assembly","tag-pcb-assembly-both-sides","tag-pcba-process","tag-prototype-assembly","tag-smt-assembly-double-sided"],"_links":{"self":[{"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/posts\/6309","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/comments?post=6309"}],"version-history":[{"count":2,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/posts\/6309\/revisions"}],"predecessor-version":[{"id":6312,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/posts\/6309\/revisions\/6312"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/media\/6310"}],"wp:attachment":[{"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/media?parent=6309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/categories?post=6309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/txjpcba.com\/fr\/wp-json\/wp\/v2\/tags?post=6309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}