{"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\/nl\/blog\/pcb-solder-mask-design-guidelines\/","title":{"rendered":"PCB soldeermasker ontwerprichtlijnen voor betrouwbare productie"},"content":{"rendered":"<p>Het soldeermasker is een van de meest zichtbare lagen op een printplaat. Het bedekt de kopersporen en laat de componentpads vrij om te solderen.<\/p><p>Hoewel het soldeermasker eenvoudig lijkt, kan een verkeerd ontwerp leiden tot verschillende fabricage- en assemblageproblemen, waaronder:<\/p><ul class=\"wp-block-list\"><li>soldeerbruggen tussen pads<\/li>\n\n<li>slechte soldeerverbindingen<\/li>\n\n<li>blootliggende koperen gebieden<\/li>\n\n<li>Verminderde PCB-opbrengst<\/li><\/ul><p>De juiste <strong>PCB soldeermasker ontwerprichtlijnen<\/strong> zorgt ervoor dat de maskerlaag zowel fabricage- als assemblageprocessen ondersteunt.<\/p><p>Deze handleiding legt de belangrijkste ontwerpparameters uit waarmee ingenieurs rekening moeten houden bij het maken van soldeermaskeropeningen en -afstanden.<\/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=\"PCB Soldeermasker\" 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\">Inhoudsopgave<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#What_Is_PCB_Solder_Mask\" >Wat is PCB-soldeermasker?<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Types_of_Solder_Mask\" >Soorten soldeermasker<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Liquid_Photoimageable_Solder_Mask_LPI\" >Vloeibaar fotoafdrukbaar soldeermasker (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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Dry_Film_Solder_Mask\" >Droog soldeermasker<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Epoxy_Screen-Printed_Mask\" >Epoxy gezeefdrukt masker<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Key_PCB_Solder_Mask_Design_Rules\" >Basisregels voor PCB-soldeermaskerontwerp<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#1_Solder_Mask_Clearance\" >1. Soldeermaskerafstand<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#2_Solder_Mask_Expansion\" >2. Uitbreiding soldeermasker<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#3_Solder_Mask_Dam_Width\" >3. Breedte soldeermasker<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#4_Fine-Pitch_Component_Considerations\" >4. Overwegingen voor onderdelen met fijne steek<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Solder_Mask_Defined_Pads_SMD\" >Soldeermasker gedefinieerde stootkussens (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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Non-Solder_Mask_Defined_Pads_NSMD\" >Niet-soldeermasker gedefinieerde elektroden (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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#How_to_Design_PCB_Solder_Mask_Practical_Steps\" >Hoe PCB Soldeermasker Ontwerpen (Praktische Stappen)<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Common_PCB_Solder_Mask_Design_Mistakes\" >Veelvoorkomende PCB soldeermasker ontwerpfouten<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Mask_openings_are_too_small\" >De maskeropeningen zijn te klein<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Insufficient_solder_mask_dam\" >Onvoldoende soldeermasker-dam<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Incorrect_pad_definitions\" >Onjuiste paddefinities<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Ignoring_manufacturing_tolerances\" >Productietoleranties negeren<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Manufacturing_Considerations\" >Overwegingen met betrekking tot de productie<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#Conclusion\" >Conclusie<\/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\/nl\/blog\/pcb-solder-mask-design-guidelines\/#PCB_Solder_Mask_FAQ\" >PCB Soldeermasker FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_PCB_Solder_Mask\"><\/span>Wat is PCB-soldeermasker?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Soldeermasker is een polymeercoating die op PCB-oppervlakken wordt aangebracht om kopersporen te beschermen en onbedoelde soldeerverbindingen te voorkomen.<\/p><p>De belangrijkste functies zijn:<\/p><ul class=\"wp-block-list\"><li>koper beschermen tegen oxidatie<\/li>\n\n<li>voorkomen van soldeerbruggen<\/li>\n\n<li>verbetering van de isolatie tussen geleiders<\/li>\n\n<li>PCB-uiterlijk verbeteren<\/li><\/ul><p>Tijdens de printplaatvervaardiging wordt de soldeermaskerlaag aangebracht na de vorming van het koperpatroon en v\u00f3\u00f3r de oppervlakteafwerking.<\/p><p>De algemene productieworkflow wordt uitgelegd in: <strong><a href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/pcb-manufacturing-process-explained-step-by-step\/\">Productieproces van PCB's uitgelegd<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Types_of_Solder_Mask\"><\/span>Soorten soldeermasker<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Bij de productie van PCB's worden verschillende soorten soldeermaskers gebruikt.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Liquid_Photoimageable_Solder_Mask_LPI\"><\/span>Vloeibaar fotoafdrukbaar soldeermasker (LPI)<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Het meest gebruikte type in moderne printplaten.<\/p><p>Kenmerken:<\/p><ul class=\"wp-block-list\"><li>aangebracht als vloeibare coating<\/li>\n\n<li>gedessineerd met fotolithografie<\/li>\n\n<li>ondersteunt componenten met fijne steek<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dry_Film_Solder_Mask\"><\/span>Droog soldeermasker<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Minder vaak gebruikt, maar geschikt voor specifieke toepassingen.<\/p><p>Kenmerken:<\/p><ul class=\"wp-block-list\"><li>gelamineerde film<\/li>\n\n<li>uniforme dikte<\/li>\n\n<li>Goed voor zeer nauwkeurige ontwerpen<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Epoxy_Screen-Printed_Mask\"><\/span>Epoxy gezeefdrukt masker<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Vooral gebruikt in oudere of goedkope printplaatprocessen.<\/p><p>Beperkingen:<\/p><ul class=\"wp-block-list\"><li>lagere resolutie<\/li>\n\n<li>niet geschikt voor onderdelen met een fijne steek<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_PCB_Solder_Mask_Design_Rules\"><\/span>Basisregels voor PCB-soldeermaskerontwerp<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Verschillende ontwerpparameters be\u00efnvloeden de prestaties van het soldeermasker.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Solder_Mask_Clearance\"><\/span>1. Soldeermaskerafstand<span class=\"ez-toc-section-end\"><\/span><\/h3><p>De soldeermaskerafstand bepaalt de afstand tussen de koperen padrand en de maskeropening.<\/p><p>Typische richtlijn:<\/p><pre class=\"wp-block-preformatted\">Maskerafstand: 3-4 mil<\/pre><p>Voldoende speling zorgt ervoor dat de pads volledig blootliggen tijdens de montage.<\/p><p>Als de speling te klein is:<\/p><ul class=\"wp-block-list\"><li>Het masker kan de randen van de pad bedekken<\/li>\n\n<li>Soldeerverbindingen kunnen onbetrouwbaar zijn<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Solder_Mask_Expansion\"><\/span>2. Uitbreiding soldeermasker<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Maskeruitbreiding is de hoeveelheid waarmee de soldeermaskeropening wordt vergroot voorbij het koperen pad.<\/p><p>Voorbeeld:<\/p><pre class=\"wp-block-preformatted\">Tampondikte = 20 mil<br>Maskeropening = 24 mil<br>Uitzetting = 2 mil per zijde<\/pre><p>Deze uitbreiding compenseert toleranties voor maskeruitlijning tijdens de fabricage.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Solder_Mask_Dam_Width\"><\/span>3. Breedte soldeermasker<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Het soldeermasker is de smalle strook masker tussen twee pads.<\/p><p>Typische minimale dambreedte:<\/p><pre class=\"wp-block-preformatted\">\u2265 4 mil<\/pre><p>Als de dam te smal is, kan deze breken tijdens de fabricage, waardoor de kans op soldeerbruggen toeneemt.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Fine-Pitch_Component_Considerations\"><\/span>4. Overwegingen voor onderdelen met fijne steek<span class=\"ez-toc-section-end\"><\/span><\/h3><p>IC's met een kleine steekbreedte en BGA's vereisen een speciaal soldeermaskerontwerp.<\/p><p>Gebruikelijke benaderingen zijn onder andere:<\/p><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solder_Mask_Defined_Pads_SMD\"><\/span>Soldeermasker gedefinieerde stootkussens (SMD)<span class=\"ez-toc-section-end\"><\/span><\/h4><p>De opening van het masker bepaalt de grootte van de pad.<\/p><p>Voordelen:<\/p><ul class=\"wp-block-list\"><li>strakkere controle voor kleine onderdelen<\/li><\/ul><h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Non-Solder_Mask_Defined_Pads_NSMD\"><\/span>Niet-soldeermasker gedefinieerde elektroden (NSMD)<span class=\"ez-toc-section-end\"><\/span><\/h4><p>De koperen pad bepaalt de grootte, de maskeropening is groter.<\/p><p>Voordelen:<\/p><ul class=\"wp-block-list\"><li>betere betrouwbaarheid van soldeerverbindingen<\/li>\n\n<li>vaak gebruikt voor BGA-pads<\/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=\"PCB Soldeermasker\" 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>Hoe PCB Soldeermasker Ontwerpen (Praktische Stappen)<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\">Ingenieurs volgen meestal verschillende stappen bij het defini\u00ebren van soldeermaskerregels.<\/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\">Stap 1 - Regels voor maskerexpansie defini\u00ebren<\/strong> <p class=\"schema-how-to-step-text\">Stel de globale maskeruitbreiding in de PCB-ontwerpsoftware in.<br\/>Typisch bereik: 2-4 mil<br\/><\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1773134096300\"><strong class=\"schema-how-to-step-name\">Stap 2 - Controleer onderdelen met fijne steek<\/strong> <p class=\"schema-how-to-step-text\">Controleer de soldeermaskeropeningen rondom:<br\/>QFN<br\/>BGA<br\/>connectoren met kleine steek<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1773134129021\"><strong class=\"schema-how-to-step-name\">Stap 3 - Controleer de maskerdambreedtes<\/strong> <p class=\"schema-how-to-step-text\">Zorg ervoor dat de afstand tussen aangrenzende pads de maskerdammen kan dragen.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1773134139200\"><strong class=\"schema-how-to-step-name\">Stap 4 - DFM-controles uitvoeren<\/strong> <p class=\"schema-how-to-step-text\">Fabrikanten beoordelen soldeermaskergegevens om de maakbaarheid te garanderen.<br\/>Het DFM-reviewproces wordt beschreven in: <strong><a href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/pcb-dfm-checklist-before-sending-gerber-files\/\">PCB DFM Checklist voor het verzenden van Gerber-bestanden<\/a><\/strong><\/p> <\/li><\/ol><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_PCB_Solder_Mask_Design_Mistakes\"><\/span>Veelvoorkomende PCB soldeermasker ontwerpfouten<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Verschillende ontwerpproblemen komen vaak voor in PCB-lay-outs.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mask_openings_are_too_small\"><\/span>De maskeropeningen zijn te klein<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Kan pads gedeeltelijk bedekken.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Insufficient_solder_mask_dam\"><\/span>Onvoldoende soldeermasker-dam<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Dit leidt tot soldeerbruggen.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Incorrect_pad_definitions\"><\/span>Onjuiste paddefinities<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Een mismatch tussen het masker en de koperen pads kan assemblageproblemen veroorzaken.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ignoring_manufacturing_tolerances\"><\/span>Productietoleranties negeren<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Er moet rekening gehouden worden met toleranties voor de uitlijning van het masker.<\/p><p>Veel betrouwbaarheidsproblemen tijdens assemblage zijn het gevolg van ontwerpproblemen die worden besproken in: <strong>Veelvoorkomende PCB-defecten en betrouwbaarheidsproblemen<\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Considerations\"><\/span>Overwegingen met betrekking tot de productie<span class=\"ez-toc-section-end\"><\/span><\/h2><p>PCB-fabrikanten evalueren soldeermaskerlagen tijdens CAM-analyse.<\/p><p>Ze bespreken:<\/p><ul class=\"wp-block-list\"><li>masker openingen<\/li>\n\n<li>maskerafstand<\/li>\n\n<li>dambreedtes<\/li>\n\n<li>uitlijntoleranties<\/li><\/ul><p>Bij fabrikanten zoals <strong><a href=\"https:\/\/www.topfastpcb.com\/nl\/about\/\">TOPFAST<\/a><\/strong>Meestal verifi\u00ebren engineeringteams de parameters van het soldeermasker v\u00f3\u00f3r de fabricage om compatibiliteit met zowel PCB-productie- als assemblageprocessen te garanderen.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusie<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Het ontwerp van soldeermaskers speelt een cruciale rol in de maakbaarheid van PCB's en de betrouwbaarheid van assemblages.<\/p><p>Door praktische ontwerpregels te volgen, zoals de juiste maskerspeling, voldoende klepbreedte en de juiste paddefinities, kunnen technici montagefouten verminderen en de productieopbrengst verbeteren.<\/p><p>Nauwe co\u00f6rdinatie tussen ontwerpteams en printplaatfabrikanten helpt ook om ervoor te zorgen dat soldeermaskerlagen voldoen aan de fabricagemogelijkheden.<\/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=\"PCB Soldeermasker\" 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>PCB Soldeermasker FAQ<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\">V: Wat is soldeermaskerafstand bij het PCB-ontwerp?<\/strong> <p class=\"schema-faq-answer\">A: De soldeermaskerafstand is de afstand tussen de koperen padrand en de soldeermaskeropening, zodat de pads bloot blijven liggen tijdens de assemblage.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773133514435\"><strong class=\"schema-faq-question\">V: Wat is de minimale breedte van het soldeermasker?<\/strong> <p class=\"schema-faq-answer\">A: De meeste printplaatfabrikanten raden een minimale soldeermasker-dambreedte aan van <strong>4 mil<\/strong> om maskerbreuk te voorkomen.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773133582473\"><strong class=\"schema-faq-question\">V: Wat gebeurt er als de soldeermaskeropeningen te klein zijn?<\/strong> <p class=\"schema-faq-answer\">A: Kleine maskeropeningen kunnen de pads gedeeltelijk bedekken, wat resulteert in slechte soldeerverbindingen.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773133596476\"><strong class=\"schema-faq-question\">V: Wat is het verschil tussen SMD- en NSMD-pads?<\/strong> <p class=\"schema-faq-answer\">A: SMD-pads worden gedefinieerd door soldeermaskeropeningen, terwijl NSMD-pads gedefinieerd worden door het koperen pad zelf. NSMD-pads worden vaak gebruikt voor BGA-componenten.<\/p> <\/div> <\/div><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Het soldeermasker is een beschermende laag die op het oppervlak van printplaten wordt aangebracht om soldeerbruggen te voorkomen en kopersporen te beschermen. Een juist soldeermaskerontwerp is essentieel voor een betrouwbare printplaatassemblage en productierendement. In dit artikel worden de belangrijkste richtlijnen voor het ontwerpen van soldeermaskers uitgelegd, waaronder maskerspeling, maskerexpansie, padopeningen en veelgemaakte lay-outfouten. Door praktische Design for Manufacturing (DFM)-regels te volgen, kunnen ingenieurs de betrouwbaarheid van de assemblage verbeteren, soldeerdefecten verminderen en compatibiliteit met standaard PCB-fabricageprocessen garanderen.<\/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 improve PCB manufacturing 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breakage.","inLanguage":"nl-NL"},"inLanguage":"nl-NL"},{"@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":"nl-NL"},"inLanguage":"nl-NL"},{"@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":"nl-NL"},"inLanguage":"nl-NL"},{"@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":"nl-NL"}]}},"_links":{"self":[{"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/posts\/5223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/comments?post=5223"}],"version-history":[{"count":1,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/posts\/5223\/revisions"}],"predecessor-version":[{"id":5228,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/posts\/5223\/revisions\/5228"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/media\/5227"}],"wp:attachment":[{"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/media?parent=5223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/categories?post=5223"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/nl\/wp-json\/wp\/v2\/tags?post=5223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}