{"id":4936,"date":"2026-01-04T08:13:00","date_gmt":"2026-01-04T00:13:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=4936"},"modified":"2026-01-07T15:37:29","modified_gmt":"2026-01-07T07:37:29","slug":"pcb-assembly-process-explained","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/","title":{"rendered":"Spiegazione del processo di assemblaggio dei PCB: SMT, fori passanti e test"},"content":{"rendered":"<p><a href=\"https:\/\/www.topfastpcb.com\/it\/products\/category\/pcba\/\">Gruppo PCB <\/a>(PCBA) \u00e8 la fase in cui un <strong>Il PCB nudo si trasforma in una scheda elettronica funzionale<\/strong>La fabbricazione di PCB si concentra sulla fase di produzione della scheda nuda, che costituisce la base dell'intero flusso di lavoro di produzione dei PCB. Comprende <strong>posizionamento dei componenti, saldatura e test rigorosi<\/strong><\/p><p>La qualit\u00e0 dell'assemblaggio influisce direttamente:<\/p><ul class=\"wp-block-list\"><li>Funzionalit\u00e0 elettrica<\/li>\n\n<li>Affidabilit\u00e0 del prodotto<\/li>\n\n<li>Rendimento di produzione<\/li><\/ul><p>A <strong>TOPFAST<\/strong>, l'assemblaggio \u00e8 trattato come un <strong>processo guidato dal rendimento<\/strong>assicurando che le schede siano funzionali e robuste.<\/p><p>Per informazioni su come l'assemblaggio dei PCB sia collegato alla fabbricazione, si veda: <a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-fabrication-vs-assembly-overview\/\">Fabbricazione di PCB e assemblaggio di PCB<\/a><\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"530\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process.jpg\" alt=\"Processo di assemblaggio PCB\" class=\"wp-image-4938\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-300x265.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-14x12.jpg 14w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Indice per materie<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Surface_Mount_Technology_SMT_Assembly\" >Assemblaggio con tecnologia a montaggio superficiale (SMT)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#What_is_SMT_Assembly\" >Che cos'\u00e8 l'assemblaggio SMT?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#SMT_Challenges\" >Sfide SMT<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Through-Hole_Assembly\" >Montaggio con foro passante<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#What_is_Through-Hole_Assembly\" >Che cos'\u00e8 il montaggio a foro passante?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Through-Hole_Assembly_Workflow\" >Flusso di lavoro per l'assemblaggio del foro passante<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Through-Hole_Challenges\" >Sfide per i fori passanti<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Testing_and_Quality_Control_in_Assembly\" >Test e controllo qualit\u00e0 nell'assemblaggio<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#In-Circuit_Testing_ICT\" >Test in-circuit (ICT)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Functional_Testing\" >Test funzionali<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Assembly_Yield_Considerations\" >Considerazioni sulla resa dell'assemblaggio<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Cost_Factors_in_Assembly\" >Fattori di costo nell'assemblaggio<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#Conclusion\" >conclusioni<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/#PCB_Assembly_Process_FAQ\" >FAQ sul processo di assemblaggio dei PCB<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Surface_Mount_Technology_SMT_Assembly\"><\/span><a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/surface-mount-technology\/\">Tecnologia di montaggio in superficie<\/a> (SMT) Montaggio<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_SMT_Assembly\"><\/span>Che cos'\u00e8 l'assemblaggio SMT?<span class=\"ez-toc-section-end\"><\/span><\/h3><p>L'assemblaggio SMT prevede il montaggio <strong>componenti a montaggio superficiale<\/strong> direttamente sulle piazzole del PCB:<\/p><ul class=\"wp-block-list\"><li>Pasta saldante<\/li>\n\n<li>Macchine pick-and-place<\/li>\n\n<li>Saldatura a riflusso<\/li><\/ul><p>SMT \u00e8 <strong>veloce, preciso e adatto a schede ad alta densit\u00e0<\/strong>comunemente utilizzati nell'elettronica di consumo, nelle telecomunicazioni e nei dispositivi IoT.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SMT_Challenges\"><\/span>Sfide SMT<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>I componenti a passo fine richiedono un'estrema precisione di posizionamento<\/li>\n\n<li>Lo stress termico durante la rifusione pu\u00f2 danneggiare i PCB se gli strati interni o la placcatura in rame non sono coerenti.<\/li>\n\n<li>I pannelli ad alta densit\u00e0 aumentano la sensibilit\u00e0 alla resa<\/li><\/ul><p>In TOPFAST, l'assemblaggio SMT \u00e8 accuratamente coordinato con i dati di fabbricazione per <strong>ridurre al minimo i difetti e migliorare la resa<\/strong>.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"536\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-1.jpg\" alt=\"Processo di assemblaggio PCB\" class=\"wp-image-4939\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-1-300x268.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-1-13x12.jpg 13w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Through-Hole_Assembly\"><\/span>Montaggio con foro passante<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_Through-Hole_Assembly\"><\/span>Che cos'\u00e8 il montaggio a foro passante?<span class=\"ez-toc-section-end\"><\/span><\/h3><p>L'assemblaggio a foro passante inserisce i componenti con i conduttori nei fori e li salda:<\/p><ul class=\"wp-block-list\"><li>Saldatura a onda (saldatura di massa)<\/li>\n\n<li>Saldatura manuale (per prototipi o schede a basso volume)<\/li><\/ul><p>Il foro passante \u00e8 ancora ampiamente utilizzato per:<\/p><ul class=\"wp-block-list\"><li>Resistenza meccanica<\/li>\n\n<li>Componenti ad alta potenza<\/li>\n\n<li>Connettori e pacchetti di grandi dimensioni<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Through-Hole_Assembly_Workflow\"><\/span>Flusso di lavoro per l'assemblaggio del foro passante<span class=\"ez-toc-section-end\"><\/span><\/h3><ol class=\"wp-block-list\"><li><strong>Riempimento di fori \/ Inserimento di componenti<\/strong> - Inserire i conduttori dei componenti nei fori placcati<\/li>\n\n<li><strong>brasatura<\/strong> - La saldatura a onda o selettiva fissa i componenti<\/li>\n\n<li><strong>Ispezione<\/strong> - Controlli visivi o AOI per la qualit\u00e0 della saldatura<\/li><\/ol><p>La qualit\u00e0 della foratura e della placcatura \u00e8 direttamente influenzata da <a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-drilling-vs-laser-drilling\/\">Foratura di PCB vs foratura laser<\/a>, e <a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/copper-plating-process-in-pcb-manufacturing-explained\/\">Spiegazione del processo di ramatura<\/a>.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Through-Hole_Challenges\"><\/span>Sfide per i fori passanti<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Fori disallineati o mal placcati riducono l'affidabilit\u00e0 del giunto di saldatura<\/li>\n\n<li>L'assemblaggio manuale aumenta il costo della manodopera e il potenziale di errore umano.<\/li>\n\n<li>Richiede pi\u00f9 spazio sulla scheda rispetto all'SMT<\/li><\/ul><p>TOPFAST combina <strong>foratura e placcatura di precisione con ottimizzazione dell'assemblaggio<\/strong> per massimizzare la resa dei fori passanti.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"558\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-2.jpg\" alt=\"Processo di assemblaggio PCB\" class=\"wp-image-4940\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-2-300x279.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-2-13x12.jpg 13w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Testing_and_Quality_Control_in_Assembly\"><\/span>Test e controllo qualit\u00e0 nell'assemblaggio<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"In-Circuit_Testing_ICT\"><\/span>Test in-circuit (ICT)<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Controlli TIC<\/p><ul class=\"wp-block-list\"><li>Pantaloncini<\/li>\n\n<li>Apre<\/li>\n\n<li>Valori corretti dei componenti<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Functional_Testing\"><\/span>Test funzionali<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Il test funzionale simula il funzionamento reale per verificare che la scheda funzioni come progettato.<\/p><p>Il collaudo \u00e8 il punto di controllo finale che assicura che le fasi di fabbricazione e assemblaggio siano conformi alle specifiche. Vedere <a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-etching-process-and-yield-control-explained\/\">Spiegazione del processo di incisione e del controllo della resa<\/a> per capire come la qualit\u00e0 delle fasi iniziali influisca sui risultati dei test.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Assembly_Yield_Considerations\"><\/span>Considerazioni sulla resa dell'assemblaggio<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Rendimento<\/p><ul class=\"wp-block-list\"><li>Qualit\u00e0 della fabbricazione (ad es. strati interni, foratura, placcatura)<\/li>\n\n<li>Precisione di posizionamento dei componenti<\/li>\n\n<li>Parametri di saldatura<\/li>\n\n<li>Progettazione della scheda (termica, spaziatura, dimensioni dei pad)<\/li><\/ul><p>L'assemblaggio ad alto rendimento riduce:<\/p><ul class=\"wp-block-list\"><li>Rielaborazione<\/li>\n\n<li>Rottami<\/li>\n\n<li>Costo di produzione complessivo<\/li>\n\n<li> Fare riferimento a <a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-fabrication-vs-assembly\/\">Fabbricazione di PCB e assemblaggio di PCB<\/a> per capire come le considerazioni sulla resa riguardino entrambi i processi.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cost_Factors_in_Assembly\"><\/span>Fattori di costo nell'assemblaggio<span class=\"ez-toc-section-end\"><\/span><\/h2><p>I principali fattori di costo:<\/p><ul class=\"wp-block-list\"><li>Tipo di componente e confezione<\/li>\n\n<li>Densit\u00e0 del pannello e numero di strati<\/li>\n\n<li>Volume di assemblaggio (prototipo o produzione di massa)<\/li>\n\n<li>Requisiti per i test e le ispezioni<\/li><\/ul><p>Ottimizzare l'assemblaggio senza sacrificare la qualit\u00e0 richiede <strong>stretto allineamento tra i processi di progettazione, fabbricazione e assemblaggio<\/strong>.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-3.jpg\" alt=\"Processo di assemblaggio PCB\" class=\"wp-image-4941\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-3-300x300.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-3-150x150.jpg 150w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-3-12x12.jpg 12w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/12\/PCB-Assembly-Process-3-100x100.jpg 100w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>conclusioni<span class=\"ez-toc-section-end\"><\/span><\/h2><p>L'assemblaggio di PCB trasforma una scheda nuda in un prodotto elettronico completamente funzionale.<br><strong>Processi SMT e a foro passante<\/strong>, combinati con test robusti, definiscono l'affidabilit\u00e0 del prodotto finale.<\/p><p>L'integrazione con la qualit\u00e0 della fabbricazione \u00e8 essenziale da raggiungere:<\/p><ul class=\"wp-block-list\"><li>Alto rendimento<\/li>\n\n<li>Produzione efficiente dal punto di vista dei costi<\/li>\n\n<li>Affidabilit\u00e0 a lungo termine<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_Assembly_Process_FAQ\"><\/span>FAQ sul processo di assemblaggio dei PCB<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1766816455537\"><strong class=\"schema-faq-question\">D: Qual \u00e8 il processo di assemblaggio dei PCB?<\/strong> <p class=\"schema-faq-answer\">R: L'assemblaggio dei circuiti stampati prevede il montaggio dei componenti elettronici su un circuito stampato fabbricato con tecniche SMT o a foro passante, seguito da ispezione e collaudo.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1766816489888\"><strong class=\"schema-faq-question\">D: Qual \u00e8 la differenza tra l'assemblaggio SMT e quello a foro passante?<\/strong> <p class=\"schema-faq-answer\">R: L'SMT monta i componenti sulla superficie del PCB, mentre il foro passante inserisce i conduttori dei componenti nei fori e li salda.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1766816516020\"><strong class=\"schema-faq-question\">D: Perch\u00e9 la qualit\u00e0 della fabbricazione \u00e8 importante per l'assemblaggio?<\/strong> <p class=\"schema-faq-answer\">R: Strati non allineati, fori non correttamente eseguiti o placcature non uniformi possono causare difetti di saldatura e ridurre la resa dell'assemblaggio.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1766816539621\"><strong class=\"schema-faq-question\">D: Quali sono i metodi di test utilizzati nell'assemblaggio dei PCB?<\/strong> <p class=\"schema-faq-answer\">R: Si utilizzano comunemente l'ispezione ottica automatizzata (AOI), l'ispezione a raggi X, i test in-circuit (ICT) e i test funzionali.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1766816568966\"><strong class=\"schema-faq-question\">D: Come fa TOPFAST a garantire un'elevata resa di assemblaggio?<\/strong> <p class=\"schema-faq-answer\">R: TOPFAST allinea i processi di fabbricazione e assemblaggio, applica ispezioni automatiche e manuali e utilizza l'ottimizzazione della resa per una produzione affidabile.<\/p> <\/div> <\/div><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Questo articolo illustra il processo di assemblaggio dei PCB dal punto di vista di un produttore professionale. Illustra le fasi principali, tra cui la tecnologia SMT e quella a fori passanti, seguite dalle procedure di collaudo essenziali. La sintesi copre anche il flusso di lavoro tipico dell'assemblaggio, le sfide comuni della produzione e i fattori critici che influenzano la resa e il controllo della qualit\u00e0.<\/p>","protected":false},"author":1,"featured_media":4686,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[275],"class_list":["post-4936","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-assembly-process"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Assembly Process Explained: SMT, Through-Hole &amp; Testing - TOPFAST<\/title>\n<meta name=\"description\" content=\"Learn the PCB assembly process including SMT, through-hole, and testing procedures. Understand assembly workflow, challenges, and yield considerations from a professional manufacturer perspective.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-assembly-process-explained\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PCB Assembly Process Explained: SMT, Through-Hole &amp; Testing - TOPFAST\" \/>\n<meta property=\"og:description\" content=\"Learn the PCB assembly process including SMT, through-hole, and testing procedures. 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