[{"data":1,"prerenderedAt":376},["ShallowReactive",2],{"blog-what-is-solder-mask-de":3,"header-nav-de":46},{"title":4,"description":5,"date":6,"lastUpdated":6,"category":7,"image":8,"readingTime":9,"wordCount":10,"timeRequired":11,"htmlContent":12,"tags":13,"slug":21,"jsonld":22},"Was ist Loetstopplack? Materialien, Farben und PCB-Regeln","Loetstopplack schuetzt Kupfer und verhindert Loetbruecken. Vergleichen Sie LPI-Materialien, Leiterplattenfarben (gruen, schwarz, blau) und DFM-Freiraeume.","2026-10-09","technology","/assets/img/pcb/multilayer/pcb-multilayer-pcb-hero.webp",3,405,"PT3M","\u003Ch2 id=\"wichtige-erkenntnisse\" data-anchor-en=\"key-takeaways\">Wichtige Erkenntnisse\u003C/h2>\n\u003Cul>\n\u003Cli>\u003Cstrong>Was Loetstopplack ist:\u003C/strong> Eine duenne, hitzebestaendige Polymerschicht, die ueber den aeusseren Kupferschichten aufgetragen wird und nur Loetpads und Testpunkte freilaesst.\u003C/li>\n\u003Cli>\u003Cstrong>Hauptfunktionen:\u003C/strong> Verhindert Loetbruecken beim Reflow- und Wellenloeten, schuetzt Kupfer vor Korrosion und bietet elektrische Isolation zwischen dichten Leiterbahnen.\u003C/li>\n\u003Cli>\u003Cstrong>Standardtechnologie:\u003C/strong> \u003Cstrong>Fluessiger fotostrukturierbarer Loetstopplack (LPI)\u003C/strong> ist weltweiter Standard, aufgetragen durch Vorhanggiessen, Siebdruck oder Spruehen und belichtet mit UV oder LDI.\u003C/li>\n\u003Cli>\u003Cstrong>Farben und optische Pruefung:\u003C/strong> Gruen bleibt der Industriestandard, da es optimalen Kontrast fuer AOI bietet, feinste Stege (3,5--4,0 mil) ermoeglicht und gleichmaessig aushaertet. Schwarz, Blau, Weiss und Rot sind fuer Aesthetik oder LED-Reflexion verfuegbar.\u003C/li>\n\u003Cli>\u003Cstrong>Kritische DFM-Regeln:\u003C/strong> Loetstopp-Freistellung (+2 bis +3 mil pro Seite um Pads) und minimale Stegbreite (Loetstoppsteg 3,5 bis 4,0 mil) verhindern Kurzschluesse bei Fine-Pitch-ICs.\u003C/li>\n\u003C/ul>\n\u003Cdiv data-component=\"BlogQuickQuoteInline\">\u003C/div>\n\n\u003Ch2 id=\"definition-und-zweck-von-loetstopplack\" data-anchor-en=\"what-is-a-solder-mask-definition-and-purpose\">Definition und Zweck von Loetstopplack\u003C/h2>\n\u003Cp>In der Elektronikfertigung ist \u003Cstrong>Loetstopplack\u003C/strong> (engl. \u003Cem>solder mask\u003C/em> oder \u003Cem>solder resist\u003C/em>) eine dauerhafte Schutzschicht aus Polymer auf den Aussenlagen einer starren oder flexiblen Leiterplatte. Er verhindert das Benetzen ungeschuetzter Leiterbahnen mit fluessigem Lot und schuetzt das Kupfer dauerhaft vor Luftfeuchtigkeit und Umwelteinfluessen.\u003C/p>\n\u003Ch2 id=\"vergleich-der-loetstopplack-farben-gruen-schwarz-blau-weiss\" data-anchor-en=\"types-of-solder-mask-materials\">Vergleich der Loetstopplack-Farben (Gruen, Schwarz, Blau, Weiss)\u003C/h2>\n\u003Cp>Waehrend Gruen die historische Standardfarbe ist, waehlen Entwickler heute je nach Anwendung unterschiedliche Farben:\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Gruen (Standard):\u003C/strong> Hoechste optische Aufloesung (3,5 mil Stege), ermuedungsfreie manuelle Inspektion und schnellste Aushaertung.\u003C/li>\n\u003Cli>\u003Cstrong>Mattschwarz & Glaenzendschwarz:\u003C/strong> Sehr beliebt bei High-End-Unterhaltungselektronik und Audiogeraeten; erfordert jedoch exzellente Ausleuchtung fuer AOI.\u003C/li>\n\u003Cli>\u003Cstrong>Weiss:\u003C/strong> Hohe Reflexion (bis zu 85–90%), ideal fuer LED-Beleuchtungsplatinen und Display-Hintergrundbeleuchtung.\u003C/li>\n\u003Cli>\u003Cstrong>Blau & Rot:\u003C/strong> Hervorragender Kontrast bei Prototypen und Entwicklungsboards, aehnlich robust wie Gruen.\u003C/li>\n\u003C/ul>\n\u003Ch2 id=\"haeufig-gestellte-fragen-zu-loetstopplack\" data-anchor-en=\"why-lpi-dominates-the-industry\">Haeufig gestellte Fragen zu Loetstopplack\u003C/h2>\n\u003Ch3 id=\"warum-sind-leiterplatten-meistens-gruen\" data-anchor-en=\"pcb-solder-mask-colors-green-black-blue-and-beyond\">Warum sind Leiterplatten meistens gruen?\u003C/h3>\n\u003Cp>Historisch basiert die gruene Farbe auf fruehen Militaerspezifikationen und Epoxid-Grundharzen. Heute bietet Gruen ueberragende Aufloesung fuer feine Stege und minimalen Augenstress bei manueller Pruefung.\u003C/p>\n\u003Ch3 id=\"was-ist-der-unterschied-zwischen-smd-und-nsmd-pads\" data-anchor-en=\"why-is-the-pcb-green\">Was ist der Unterschied zwischen SMD und NSMD Pads?\u003C/h3>\n\u003Cp>Bei SMD (Solder Mask Defined) ueberlappt der Lack das Kupferpad; bei NSMD (Non-Solder Mask Defined) ist die Freistellung groesser als das Pad. NSMD ist Standard fuer BGA-Pads wegen besserer Ermuedungsfestigkeit.\u003C/p>\n\u003Ch3 id=\"wie-dick-ist-die-loetstopplackschicht\" data-anchor-en=\"solder-mask-thickness-and-planar-coverage\">Wie dick ist die Loetstopplackschicht?\u003C/h3>\n\u003Cp>Typischerweise betraegt die Dicke ueber den Leiterbahnkanten ca. 10 bis 15 µm (0,4--0,6 mil) und auf dem Basislaminat 20 bis 30 µm (0,8--1,2 mil).\u003C/p>\n\u003Ch2 id=\"verwandte-ressourcen-und-technische-leitfaden\" data-anchor-en=\"critical-dfm-rules-clearances-dams-and-mask-defined-pads\">Verwandte Ressourcen und technische Leitfäden\u003C/h2>\n\u003Cul>\n\u003Cli>\u003Ca href=\"/de/blog/what-is-dfm\">/blog/what-is-dfm\u003C/a> - Comprehensive PCB Design for Manufacturing guidelines\u003C/li>\n\u003Cli>\u003Ca href=\"/de/pcb\">/pcb\u003C/a> - Full fabrication capabilities and solder mask tolerances\u003C/li>\n\u003Cli>\u003Ca href=\"/de/pcba\">/pcba\u003C/a> - High-speed SMT assembly and solder bridging prevention\u003C/li>\n\u003Cli>\u003Ca href=\"/de/materials\">/materials\u003C/a> - Complete PCB substrate and laminate material catalog\u003C/li>\n\u003C/ul>\n\n\u003Csection class=\"related-links\" aria-label=\"Related\">\u003Ch3>Related links\u003C/h3>\u003Cul>\u003Cli>\u003Ca href=\"/de/blog/what-is-dfm\">/blog/what-is-dfm\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/de/pcb\">/pcb\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/de/pcba\">/pcba\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/de/materials\">/materials\u003C/a>\u003C/li>\u003C/ul>\u003C/section>",[14,15,16,17,18,19,20],"Solder Mask","Solder Resist","PCB Colors","LPI Solder Mask","Solder Bridge","PCB DFM","Solder Dam","what-is-solder-mask",{"blog":23,"breadcrumb":32,"faq":45},{"@context":24,"@type":25,"headline":4,"description":5,"image":8,"url":26,"datePublished":6,"dateModified":6,"timeRequired":11,"keywords":27,"articleSection":7,"author":28,"publisher":31},"https://schema.org","BlogPosting","https://aptpcb.com/de/blog/what-is-solder-mask","Solder Mask, Solder Resist, PCB Colors, LPI Solder Mask, Solder Bridge, PCB DFM, Solder 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