{"id":5223,"date":"2026-03-15T08:32:00","date_gmt":"2026-03-15T00:32:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5223"},"modified":"2026-03-10T17:27:50","modified_gmt":"2026-03-10T09:27:50","slug":"pcb-solder-mask-design-guidelines","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/","title":{"rendered":"Linee guida per la progettazione delle maschere di saldatura dei PCB per una produzione affidabile"},"content":{"rendered":"<p>La maschera di saldatura \u00e8 uno degli strati pi\u00f9 visibili di un circuito stampato. Copre le tracce di rame lasciando esposte le piazzole dei componenti per la saldatura.<\/p><p>Sebbene la maschera di saldatura sembri semplice, una progettazione non corretta pu\u00f2 causare diversi problemi di produzione e assemblaggio, tra cui:<\/p><ul class=\"wp-block-list\"><li>ponti di saldatura tra le piazzole<\/li>\n\n<li>giunti di saldatura scadenti<\/li>\n\n<li>aree di rame esposte<\/li>\n\n<li>Riduzione della resa dei PCB<\/li><\/ul><p>Seguendo le corrette <strong>Linee guida per la progettazione di maschere di saldatura per PCB<\/strong> assicura che lo strato di maschera supporti sia i processi di fabbricazione che quelli di assemblaggio.<\/p><p>Questa guida illustra i principali parametri di progettazione che gli ingegneri devono considerare quando creano aperture e distanze per le maschere di saldatura.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"437\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask.jpg\" alt=\"Maschera di saldatura PCB\" class=\"wp-image-5224\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-300x219.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-16x12.jpg 16w\" 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-solder-mask-design-guidelines\/#What_Is_PCB_Solder_Mask\" >Che cos'\u00e8 la maschera di saldatura per PCB?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Types_of_Solder_Mask\" >Tipi di maschera di saldatura<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Liquid_Photoimageable_Solder_Mask_LPI\" >Maschera di saldatura liquida fotoimmaginabile (LPI)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Dry_Film_Solder_Mask\" >Maschera di saldatura a film secco<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Epoxy_Screen-Printed_Mask\" >Maschera serigrafica epossidica<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Key_PCB_Solder_Mask_Design_Rules\" >Regole fondamentali per la progettazione delle maschere di saldatura dei PCB<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#1_Solder_Mask_Clearance\" >1. Distanza dalla maschera di saldatura<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#2_Solder_Mask_Expansion\" >2. Espansione della maschera di saldatura<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#3_Solder_Mask_Dam_Width\" >3. Larghezza della diga della maschera di saldatura<\/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-solder-mask-design-guidelines\/#4_Fine-Pitch_Component_Considerations\" >4. Considerazioni sui componenti a passo fine<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Solder_Mask_Defined_Pads_SMD\" >Pad definiti dalla maschera di saldatura (SMD)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Non-Solder_Mask_Defined_Pads_NSMD\" >Pad definiti con maschera non saldante (NSMD)<\/a><\/li><\/ul><\/li><\/ul><\/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-solder-mask-design-guidelines\/#How_to_Design_PCB_Solder_Mask_Practical_Steps\" >Come progettare la maschera di saldatura di un PCB (passaggi pratici)<\/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-solder-mask-design-guidelines\/#Common_PCB_Solder_Mask_Design_Mistakes\" >Errori comuni nella progettazione delle maschere di saldatura dei PCB<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Mask_openings_are_too_small\" >Le aperture della maschera sono troppo piccole<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Insufficient_solder_mask_dam\" >Danno insufficiente della maschera di saldatura<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Incorrect_pad_definitions\" >Definizioni errate dei pad<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Ignoring_manufacturing_tolerances\" >Ignorare le tolleranze di produzione<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Manufacturing_Considerations\" >Considerazioni relative alla produzione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#Conclusion\" >conclusioni<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-solder-mask-design-guidelines\/#PCB_Solder_Mask_FAQ\" >FAQ sulle maschere di saldatura dei PCB<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_PCB_Solder_Mask\"><\/span>Che cos'\u00e8 la maschera di saldatura per PCB?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>La maschera di saldatura \u00e8 un rivestimento polimerico applicato alle superfici dei circuiti stampati per proteggere le tracce di rame e prevenire connessioni a saldare non volute.<\/p><p>Le sue funzioni principali comprendono:<\/p><ul class=\"wp-block-list\"><li>proteggere il rame dall'ossidazione<\/li>\n\n<li>prevenzione dei ponti di saldatura<\/li>\n\n<li>migliorare l'isolamento tra i conduttori<\/li>\n\n<li>migliorare l'aspetto dei PCB<\/li><\/ul><p>Durante la fabbricazione dei PCB, lo strato di maschera di saldatura viene applicato dopo la formazione del modello di rame e prima della finitura della superficie.<\/p><p>Il flusso di lavoro complessivo della fabbricazione \u00e8 spiegato in: <strong><a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-manufacturing-process-explained-step-by-step\/\">Spiegazione del processo di produzione dei PCB<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Types_of_Solder_Mask\"><\/span>Tipi di maschera di saldatura<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Nella produzione dei PCB vengono utilizzati diversi tipi di maschere di saldatura.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Liquid_Photoimageable_Solder_Mask_LPI\"><\/span>Maschera di saldatura liquida fotoimmaginabile (LPI)<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Il tipo pi\u00f9 comunemente utilizzato nei moderni PCB.<\/p><p>Caratteristiche:<\/p><ul class=\"wp-block-list\"><li>applicato come rivestimento liquido<\/li>\n\n<li>modellato mediante fotolitografia<\/li>\n\n<li>supporta componenti a passo fine<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dry_Film_Solder_Mask\"><\/span>Maschera di saldatura a film secco<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Meno utilizzati, ma adatti ad applicazioni specifiche.<\/p><p>Caratteristiche:<\/p><ul class=\"wp-block-list\"><li>film laminato<\/li>\n\n<li>spessore uniforme<\/li>\n\n<li>Ottimo per progetti di alta precisione<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Epoxy_Screen-Printed_Mask\"><\/span>Maschera serigrafica epossidica<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Utilizzato principalmente nei processi PCB pi\u00f9 vecchi o a basso costo.<\/p><p>Limitazioni:<\/p><ul class=\"wp-block-list\"><li>risoluzione inferiore<\/li>\n\n<li>non adatto a componenti a passo fine<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_PCB_Solder_Mask_Design_Rules\"><\/span>Regole fondamentali per la progettazione delle maschere di saldatura dei PCB<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Diversi parametri di progettazione influenzano le prestazioni della maschera di saldatura.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Solder_Mask_Clearance\"><\/span>1. Distanza dalla maschera di saldatura<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Il gioco della maschera di saldatura definisce la distanza tra il bordo della piazzola di rame e l'apertura della maschera.<\/p><p>Linea guida tipica:<\/p><pre class=\"wp-block-preformatted\">Distanza dalla maschera: 3-4 mil<\/pre><p>Un'adeguata distanza assicura che i pattini siano completamente esposti durante il montaggio.<\/p><p>Se lo spazio \u00e8 troppo ridotto:<\/p><ul class=\"wp-block-list\"><li>La maschera pu\u00f2 coprire i bordi del pad<\/li>\n\n<li>I giunti a saldare possono essere inaffidabili<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Solder_Mask_Expansion\"><\/span>2. Espansione della maschera di saldatura<span class=\"ez-toc-section-end\"><\/span><\/h3><p>L'espansione della maschera \u00e8 la quantit\u00e0 di apertura della maschera di saldatura che si allarga oltre la piazzola di rame.<\/p><p>Esempio:<\/p><pre class=\"wp-block-preformatted\">Dimensione del tampone = 20 mil<br>Apertura della maschera = 24 mil<br>Espansione = 2 mil per lato<\/pre><p>Questa espansione compensa le tolleranze di allineamento della maschera durante la fabbricazione.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Solder_Mask_Dam_Width\"><\/span>3. Larghezza della diga della maschera di saldatura<span class=\"ez-toc-section-end\"><\/span><\/h3><p>La diga della maschera di saldatura \u00e8 la stretta striscia di maschera tra due piazzole.<\/p><p>Larghezza minima tipica della diga:<\/p><pre class=\"wp-block-preformatted\">\u2265 4 mil<\/pre><p>Se la diga \u00e8 troppo stretta, pu\u00f2 rompersi durante la produzione, aumentando il rischio di ponti di saldatura.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Fine-Pitch_Component_Considerations\"><\/span>4. Considerazioni sui componenti a passo fine<span class=\"ez-toc-section-end\"><\/span><\/h3><p>I circuiti integrati a passo fine e i BGA richiedono una speciale progettazione della maschera di saldatura.<\/p><p>Gli approcci pi\u00f9 comuni includono:<\/p><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solder_Mask_Defined_Pads_SMD\"><\/span>Pad definiti dalla maschera di saldatura (SMD)<span class=\"ez-toc-section-end\"><\/span><\/h4><p>L'apertura della maschera definisce la dimensione del tampone.<\/p><p>Vantaggi:<\/p><ul class=\"wp-block-list\"><li>controllo pi\u00f9 stretto per i piccoli componenti<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Non-Solder_Mask_Defined_Pads_NSMD\"><\/span>Pad definiti con maschera non saldante (NSMD)<span class=\"ez-toc-section-end\"><\/span><\/h4><p>Il cuscinetto di rame definisce la dimensione, l'apertura della maschera \u00e8 pi\u00f9 grande.<\/p><p>Vantaggi:<\/p><ul class=\"wp-block-list\"><li>migliore affidabilit\u00e0 del giunto di saldatura<\/li>\n\n<li>comunemente utilizzato per le piazzole BGA<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"468\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-1.jpg\" alt=\"Maschera di saldatura PCB\" class=\"wp-image-5225\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-1-300x234.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-1-15x12.jpg 15w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Design_PCB_Solder_Mask_Practical_Steps\"><\/span>Come progettare la maschera di saldatura di un PCB (passaggi pratici)<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-how-to wp-block-yoast-how-to-block\"><p class=\"schema-how-to-description\">In genere gli ingegneri seguono diverse fasi nella definizione delle regole della maschera di saldatura.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1773134083798\"><strong class=\"schema-how-to-step-name\">Passo 1 - Definire le regole di espansione della maschera<\/strong> <p class=\"schema-how-to-step-text\">Impostare l'espansione globale della maschera nel software di progettazione PCB.<br\/>Gamma tipica: 2-4 mil<br\/><\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1773134096300\"><strong class=\"schema-how-to-step-name\">Fase 2 - Controllo dei componenti a passo fine<\/strong> <p class=\"schema-how-to-step-text\">Verificare le aperture della maschera di saldatura intorno:<br\/>QFN<br\/>BGA<br\/>connettori a passo ridotto<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1773134129021\"><strong class=\"schema-how-to-step-name\">Fase 3 - Verifica della larghezza della diga della maschera<\/strong> <p class=\"schema-how-to-step-text\">Assicurarsi che la distanza tra le piastre adiacenti sia in grado di sostenere le dighe a maschera.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1773134139200\"><strong class=\"schema-how-to-step-name\">Fase 4 - Esecuzione dei controlli DFM<\/strong> <p class=\"schema-how-to-step-text\">I produttori esaminano i dati delle maschere di saldatura per garantire la producibilit\u00e0.<br\/>Il processo di revisione del DFM \u00e8 descritto in: <strong><a href=\"https:\/\/www.topfastpcb.com\/it\/blog\/pcb-dfm-checklist-before-sending-gerber-files\/\">Lista di controllo DFM PCB prima di inviare i file Gerber<\/a><\/strong><\/p> <\/li><\/ol><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_PCB_Solder_Mask_Design_Mistakes\"><\/span>Errori comuni nella progettazione delle maschere di saldatura dei PCB<span class=\"ez-toc-section-end\"><\/span><\/h2><p>I layout dei circuiti stampati presentano spesso diversi problemi di progettazione.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mask_openings_are_too_small\"><\/span>Le aperture della maschera sono troppo piccole<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Pu\u00f2 coprire parzialmente i cuscinetti.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Insufficient_solder_mask_dam\"><\/span>Danno insufficiente della maschera di saldatura<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Porta alla formazione di ponti di saldatura.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Incorrect_pad_definitions\"><\/span>Definizioni errate dei pad<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Una mancata corrispondenza tra la maschera e le piazzole di rame pu\u00f2 causare problemi di assemblaggio.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ignoring_manufacturing_tolerances\"><\/span>Ignorare le tolleranze di produzione<span class=\"ez-toc-section-end\"><\/span><\/h3><p>\u00c8 necessario considerare le tolleranze di allineamento della maschera.<\/p><p>Molti problemi di affidabilit\u00e0 durante l'assemblaggio derivano da problemi di progettazione discussi in: <strong>Guasti comuni dei PCB e problemi di affidabilit\u00e0<\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Considerations\"><\/span>Considerazioni relative alla produzione<span class=\"ez-toc-section-end\"><\/span><\/h2><p>I produttori di PCB valutano gli strati della maschera di saldatura durante l'analisi CAM.<\/p><p>Esaminano:<\/p><ul class=\"wp-block-list\"><li>aperture della maschera<\/li>\n\n<li>autorizzazione della maschera<\/li>\n\n<li>larghezza della diga<\/li>\n\n<li>tolleranze di allineamento<\/li><\/ul><p>Presso produttori come <strong><a href=\"https:\/\/www.topfastpcb.com\/it\/about\/\">TOPFAST<\/a><\/strong>I team di ingegneri verificano in genere i parametri delle maschere di saldatura prima della fabbricazione per garantire la compatibilit\u00e0 con i processi di fabbricazione e assemblaggio dei PCB.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>conclusioni<span class=\"ez-toc-section-end\"><\/span><\/h2><p>La progettazione delle maschere di saldatura svolge un ruolo cruciale nella producibilit\u00e0 dei PCB e nell'affidabilit\u00e0 dell'assemblaggio.<\/p><p>Seguendo le regole pratiche di progettazione, come il corretto gioco della maschera, la larghezza sufficiente della diga e la corretta definizione dei pad, gli ingegneri possono ridurre i difetti di assemblaggio e migliorare la resa produttiva.<\/p><p>Lo stretto coordinamento tra i team di progettazione e i produttori di PCB aiuta anche a garantire che gli strati della maschera di saldatura soddisfino le capacit\u00e0 di fabbricazione.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"406\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-2.jpg\" alt=\"Maschera di saldatura PCB\" class=\"wp-image-5226\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-2-300x203.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-Solder-Mask-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_Solder_Mask_FAQ\"><\/span>FAQ sulle maschere di saldatura 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-1773133323837\"><strong class=\"schema-faq-question\">D: Che cos'\u00e8 il gioco della maschera di saldatura nella progettazione di PCB?<\/strong> <p class=\"schema-faq-answer\">R: Il gioco della maschera di saldatura \u00e8 la distanza tra il bordo della piazzola di rame e l'apertura della maschera di saldatura, per garantire che le piazzole rimangano esposte durante l'assemblaggio.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773133514435\"><strong class=\"schema-faq-question\">D: Qual \u00e8 la larghezza minima della diga della maschera di saldatura?<\/strong> <p class=\"schema-faq-answer\">R: La maggior parte dei produttori di PCB raccomanda una larghezza minima dello sbarramento della maschera di saldatura pari a <strong>4 milioni di euro<\/strong> per evitare la rottura della maschera.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773133582473\"><strong class=\"schema-faq-question\">D: Cosa succede se le aperture della maschera di saldatura sono troppo piccole?<\/strong> <p class=\"schema-faq-answer\">R: Le aperture della maschera di piccole dimensioni possono coprire parzialmente le piazzole, con conseguenti giunti di saldatura scadenti.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773133596476\"><strong class=\"schema-faq-question\">D: Qual \u00e8 la differenza tra i pad SMD e NSMD?<\/strong> <p class=\"schema-faq-answer\">R: Le piazzole SMD sono definite dalle aperture della maschera di saldatura, mentre le piazzole NSMD sono definite dalla piazzola di rame stessa. Le piazzole NSMD sono comunemente utilizzate per i componenti BGA.<\/p> <\/div> <\/div><p><\/p>","protected":false},"excerpt":{"rendered":"<p>La maschera di saldatura \u00e8 uno strato protettivo applicato alla superficie dei circuiti stampati per evitare ponti di saldatura e proteggere le tracce di rame. Una corretta progettazione della maschera di saldatura \u00e8 essenziale per un assemblaggio affidabile dei circuiti stampati e per la resa della produzione. Questo articolo illustra le principali linee guida per la progettazione delle maschere di saldatura, tra cui la distanza tra le maschere, l'espansione delle maschere, le aperture delle piazzole e i comuni errori di layout. Seguendo le regole pratiche del Design for Manufacturing (DFM), gli ingegneri possono migliorare l'affidabilit\u00e0 dell'assemblaggio, ridurre i difetti di saldatura e garantire la compatibilit\u00e0 con i processi di fabbricazione dei PCB standard.<\/p>","protected":false},"author":1,"featured_media":5227,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[446],"class_list":["post-5223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-solder-mask"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Solder Mask Design Guidelines: Clearance, Expansion and Manufacturing Rules<\/title>\n<meta name=\"description\" content=\"Learn PCB solder mask design guidelines including mask clearance, expansion rules, pad openings, and common DFM mistakes to 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What is solder mask clearance in PCB design?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Solder mask clearance is the distance between the copper pad edge and the solder mask opening, ensuring pads remain exposed during assembly.\",\"inLanguage\":\"it-IT\"},\"inLanguage\":\"it-IT\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133514435\",\"position\":2,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133514435\",\"name\":\"Q: What is the minimum solder mask dam width?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Most PCB manufacturers recommend a minimum solder mask dam width of <strong>4 mil<\/strong> to prevent mask 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What is solder mask clearance in PCB design?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Solder mask clearance is the distance between the copper pad edge and the solder mask opening, ensuring pads remain exposed during assembly.","inLanguage":"it-IT"},"inLanguage":"it-IT"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133514435","position":2,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133514435","name":"Q: What is the minimum solder mask dam width?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Most PCB manufacturers recommend a minimum solder mask dam width of <strong>4 mil<\/strong> to prevent mask breakage.","inLanguage":"it-IT"},"inLanguage":"it-IT"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133582473","position":3,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133582473","name":"Q: What happens if solder mask openings are too small?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Small mask openings may partially cover pads, resulting in poor solder joints.","inLanguage":"it-IT"},"inLanguage":"it-IT"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133596476","position":4,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#faq-question-1773133596476","name":"Q: What is the difference between SMD and NSMD pads?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: SMD pads are defined by solder mask openings, while NSMD pads are defined by the copper pad itself. NSMD pads are commonly used for BGA components.","inLanguage":"it-IT"},"inLanguage":"it-IT"},{"@type":"HowTo","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#howto-1","name":"PCB Solder Mask Design Guidelines for Reliable Manufacturing","mainEntityOfPage":{"@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#article"},"description":"Engineers typically follow several steps when defining solder mask rules.","step":[{"@type":"HowToStep","url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#how-to-step-1773134083798","name":"Step 1 \u2014 Define mask expansion rules","itemListElement":[{"@type":"HowToDirection","text":"Set the global mask expansion in the PCB design software.<br\/>Typical range: 2\u20134 mil<br\/>"}]},{"@type":"HowToStep","url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#how-to-step-1773134096300","name":"Step 2 \u2014 Check fine-pitch components","itemListElement":[{"@type":"HowToDirection","text":"Verify solder mask openings around:<br\/>QFN<br\/>BGA<br\/>small pitch connectors"}]},{"@type":"HowToStep","url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#how-to-step-1773134129021","name":"Step 3 \u2014 Verify mask dam widths","itemListElement":[{"@type":"HowToDirection","text":"Ensure spacing between adjacent pads can support mask dams."}]},{"@type":"HowToStep","url":"https:\/\/www.topfastpcb.com\/blog\/pcb-solder-mask-design-guidelines\/#how-to-step-1773134139200","name":"Step 4 \u2014 Perform DFM checks","itemListElement":[{"@type":"HowToDirection","text":"Manufacturers review solder mask data to ensure manufacturability.<br\/>The DFM review process is described in: <strong><a href=\"https:\/\/www.topfastpcb.com\/blog\/pcb-dfm-checklist-before-sending-gerber-files\/\">PCB DFM Checklist Before Sending Gerber Files<\/a><\/strong>"}]}],"inLanguage":"it-IT"}]}},"_links":{"self":[{"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/posts\/5223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/comments?post=5223"}],"version-history":[{"count":1,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/posts\/5223\/revisions"}],"predecessor-version":[{"id":5228,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/posts\/5223\/revisions\/5228"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/media\/5227"}],"wp:attachment":[{"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/media?parent=5223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/categories?post=5223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/it\/wp-json\/wp\/v2\/tags?post=5223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}