{"id":5912,"date":"2026-07-08T08:43:00","date_gmt":"2026-07-08T00:43:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5912"},"modified":"2026-06-25T10:01:12","modified_gmt":"2026-06-25T02:01:12","slug":"fr4-pcb-material","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/","title":{"rendered":"FR4-printplademateriale forklaret"},"content":{"rendered":"<p>FR4 har i \u00e5rtier v\u00e6ret standardmaterialet til printplader. Kombinationen af elektriske egenskaber, mekanisk styrke og overkommelig pris g\u00f8r det velegnet til alt fra enkle forbrugerprodukter til komplekse flerlagsprintplader.<\/p><p>Selvom der i dag findes mange specialiserede laminater, er FR4 stadig det foretrukne valg for de fleste <a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/what-is-a-pcb-design\/\">PCB-design<\/a> fordi det sikrer en god balance mellem p\u00e5lidelighed og produktionsomkostninger.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB.jpg\" alt=\"FR4-printplade\" class=\"wp-image-5913\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-18x12.jpg 18w\" 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\">Indholdsfortegnelse<\/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\/da\/blog\/fr4-pcb-material\/#What_FR4_Means\" >Hvad FR4 betyder<\/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\/da\/blog\/fr4-pcb-material\/#How_FR4_Is_Used_in_PCB_Manufacturing\" >S\u00e5dan anvendes FR4 i fremstillingen af printkort<\/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\/da\/blog\/fr4-pcb-material\/#Single-Sided_Boards\" >Enkelsidede printplader<\/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\/da\/blog\/fr4-pcb-material\/#Double-Sided_Boards\" >Dobbeltsidede plader<\/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\/da\/blog\/fr4-pcb-material\/#Multilayer_Boards\" >Plader i flere lag<\/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\/da\/blog\/fr4-pcb-material\/#Common_FR4_Material_Properties\" >Almindelige egenskaber ved FR4-materiale<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Standard_TG_and_High_TG_FR4\" >FR4 med standard TG og h\u00f8j TG<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Standard_TG_Materials\" >Standard TG-materialer<\/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\/da\/blog\/fr4-pcb-material\/#High_TG_Materials\" >Materialer med h\u00f8jt TG-v\u00e6rdi<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Advantages_of_FR4\" >Fordelene ved FR4<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Cost_Efficiency\" >Omkostningseffektivitet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Mature_Manufacturing_Process\" >Et veludviklet produktionsforl\u00f8b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Mechanical_Stability\" >Mekanisk stabilitet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Wide_Availability\" >Bred tilg\u00e6ngelighed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Suitable_for_Most_Applications\" >Egnet til de fleste anvendelsesform\u00e5l<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Limitations_of_FR4\" >Begr\u00e6nsninger ved FR4<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Higher_Signal_Loss\" >St\u00f8rre signaltab<\/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\/da\/blog\/fr4-pcb-material\/#Limited_Thermal_Conductivity\" >Begr\u00e6nset varmeledningsevne<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Dk_Variation\" >Dk-variation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Not_Ideal_for_RF_Applications\" >Ikke ideel til RF-anvendelser<\/a><\/li><\/ul><\/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\/da\/blog\/fr4-pcb-material\/#Popular_FR4_Material_Brands\" >Popul\u00e6re m\u00e6rker af FR4-materiale<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Shengyi\" >Shengyi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Kingboard\" >Kingboard<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#ITEQ\" >ITEQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Isola\" >Isola<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Ventec\" >Ventec<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Typical_Applications_of_FR4\" >Typiske anvendelsesomr\u00e5der for FR4<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Consumer_Electronics\" >Forbrugerelektronik<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Industrial_Equipment\" >Industrielt udstyr<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Automotive_Electronics\" >Elektronik til biler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Medical_Devices\" >Medicinsk udstyr<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#Communication_Products\" >Kommunikationsprodukter<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#When_FR4_Is_No_Longer_Enough\" >N\u00e5r FR4 ikke l\u00e6ngere er nok<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/#FAQ\" >OFTE STILLEDE SP\u00d8RGSM\u00c5L<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_FR4_Means\"><\/span>Hvad FR4 betyder<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR st\u00e5r for flammeh\u00e6mmende, mens tallet 4 henviser til den klassificering, der er fastlagt i NEMA-standarden.<\/p><p>FR4 er fremstillet af v\u00e6vet glasfiberdug, der er impr\u00e6gneret med epoxyharpiks. Efter h\u00e6rdning under varme og tryk danner materialet et stift, isolerende underlag, der kan b\u00e6re kobberlag og elektroniske komponenter.<\/p><p>Materialet indeholder:<\/p><ul class=\"wp-block-list\"><li>God mekanisk styrke<\/li>\n\n<li>Stabile elektriske egenskaber<\/li>\n\n<li>Fremragende isolering<\/li>\n\n<li>Modstandsdygtighed over for fugt<\/li>\n\n<li>Lave produktionsomkostninger<\/li><\/ul><p>Disse egenskaber forklarer, hvorfor FR4 dominerer <a href=\"https:\/\/www.topfastpcb.com\/da\/pcb-industries\/\">PCB-branchen<\/a>.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_FR4_Is_Used_in_PCB_Manufacturing\"><\/span>S\u00e5dan anvendes FR4 i fremstillingen af printkort<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR4 fungerer som det dielektriske materiale mellem kobberlagene.<\/p><p>Typiske strukturer omfatter:<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Single-Sided_Boards\"><\/span>Enkelsidede printplader<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Anvendes i:<\/p><ul class=\"wp-block-list\"><li>Str\u00f8madaptere<\/li>\n\n<li>Husholdningsapparater<\/li>\n\n<li>LED-produkter<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Double-Sided_Boards\"><\/span>Dobbeltsidede plader<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Almindeligt i:<\/p><ul class=\"wp-block-list\"><li>Industrielle styreenheder<\/li>\n\n<li>Elektronik til biler<\/li>\n\n<li>Kommunikationsudstyr<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Multilayer_Boards\"><\/span>Plader i flere lag<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Anvendes ofte til:<\/p><ul class=\"wp-block-list\"><li>Servere<\/li>\n\n<li>Medicinsk udstyr<\/li>\n\n<li>Netv\u00e6rksudstyr<\/li>\n\n<li>Indlejrede systemer<\/li><\/ul><p>Moderne flerlagsprintkort med 4 til 20 lag fremstilles typisk ved hj\u00e6lp af FR4-laminater og prepregs.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_FR4_Material_Properties\"><\/span>Almindelige egenskaber ved FR4-materiale<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Selvom specifikationerne varierer fra producent til producent, har standard FR4-materialer som regel f\u00f8lgende egenskaber.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Ejendom<\/th><th>Typisk v\u00e6rdi<\/th><\/tr><tr><td>Dielektricitetskonstant (Dk)<\/td><td>4.2-4.8<\/td><\/tr><tr><td>Dissipationsfaktor (Df)<\/td><td>0.015-0.025<\/td><\/tr><tr><td>Glasovergangstemperatur<\/td><td>130\u2013170 \u00b0C<\/td><\/tr><tr><td>Varmeledningsevne<\/td><td>0,3\u20130,4 W\/m\u00b7K<\/td><\/tr><tr><td>Volumenresistivitet<\/td><td>&gt;10\u00b9\u00b2 \u03a9\u00b7cm<\/td><\/tr><tr><td>Brandklasse<\/td><td>UL94 V-0<\/td><\/tr><\/tbody><\/table><\/figure><p>Disse v\u00e6rdier er velegnede til de fleste elektroniske produkter med lav og mellemh\u00f8j hastighed.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-1.jpg\" alt=\"FR4-printplade\" class=\"wp-image-5914\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Standard_TG_and_High_TG_FR4\"><\/span>FR4 med standard TG og h\u00f8j TG<span class=\"ez-toc-section-end\"><\/span><\/h2><p>En vigtig parameter for FR4 er glasovergangstemperaturen (TG).<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Standard_TG_Materials\"><\/span>Standard TG-materialer<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Typiske TG-v\u00e6rdier ligger mellem 130 \u00b0C og 140 \u00b0C.<\/p><p>Applikationerne omfatter:<\/p><ul class=\"wp-block-list\"><li>Forbrugerelektronik<\/li>\n\n<li>Husholdningsapparater<\/li>\n\n<li>Generelle industriprodukter<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_TG_Materials\"><\/span>Materialer med h\u00f8jt TG-v\u00e6rdi<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Laminater med h\u00f8j TG har normalt v\u00e6rdier over 170 \u00b0C.<\/p><p>De leverer bedre ydeevne under:<\/p><ul class=\"wp-block-list\"><li>Blyfri samling<\/li>\n\n<li>H\u00f8je driftstemperaturer<\/li>\n\n<li>Flere reflow-cyklusser<\/li><\/ul><p>Materialer med h\u00f8jt TG-indhold findes typisk i:<\/p><ul class=\"wp-block-list\"><li>Elektronik til biler<\/li>\n\n<li>Str\u00f8mforsyninger<\/li>\n\n<li>Servere<\/li>\n\n<li>Telekommunikationsudstyr<\/li><\/ul><p><em>Internt link: <a href=\"https:\/\/www.topfastpcb.com\/da\/blog\/high-tg-fr4-pcb\/\">FR4-printplade med h\u00f8j TG-v\u00e6rdi<\/a><\/em><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advantages_of_FR4\"><\/span>Fordelene ved FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Flere faktorer g\u00f8r FR4 til branchens mest udbredte substrat.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cost_Efficiency\"><\/span>Omkostningseffektivitet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>FR4 er betydeligt billigere end RF-laminater og specialmaterialer.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mature_Manufacturing_Process\"><\/span>Et veludviklet produktionsforl\u00f8b<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Stort set alle producenter af printkort tilbyder fremstilling af FR4-printkort.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mechanical_Stability\"><\/span>Mekanisk stabilitet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Glasfiberkonstruktionen sikrer fremragende stivhed og formstabilitet.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wide_Availability\"><\/span>Bred tilg\u00e6ngelighed<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Store leverand\u00f8rer som Shengyi, Kingboard, ITEQ og Isola tilbyder en lang r\u00e6kke FR4-produktserier.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Suitable_for_Most_Applications\"><\/span>Egnet til de fleste anvendelsesform\u00e5l<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Ved frekvenser under flere gigahertz opfylder FR4 som regel de elektriske krav uden at medf\u00f8re uforholdsm\u00e6ssigt store omkostninger.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limitations_of_FR4\"><\/span>Begr\u00e6nsninger ved FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>P\u00e5 trods af sin alsidighed er FR4 ikke egnet til alle anvendelsesform\u00e5l.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Higher_Signal_Loss\"><\/span>St\u00f8rre signaltab<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Sammenlignet med laminater med lavt tab udviser FR4 et h\u00f8jere dielektrisk tab ved h\u00f8je frekvenser.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limited_Thermal_Conductivity\"><\/span>Begr\u00e6nset varmeledningsevne<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Varmeafledningen er forholdsvis d\u00e5rlig.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dk_Variation\"><\/span>Dk-variation<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Den dielektriske konstant varierer afh\u00e6ngigt af frekvensen og fremstillingsbetingelserne, hvilket kan p\u00e5virke impedansens konsistens.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Not_Ideal_for_RF_Applications\"><\/span>Ikke ideel til RF-anvendelser<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Konstruktioner til mikrob\u00f8lge- og millimeterb\u00f8lgeomr\u00e5det kr\u00e6ver ofte specialmaterialer.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Popular_FR4_Material_Brands\"><\/span>Popul\u00e6re m\u00e6rker af FR4-materiale<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Flere producenter af laminat dominerer markedet.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Shengyi\"><\/span>Shengyi<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Udbredt i Asien og kendt for sin stabile kvalitet.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kingboard\"><\/span>Kingboard<span class=\"ez-toc-section-end\"><\/span><\/h3><p>En af verdens st\u00f8rste leverand\u00f8rer af PCB-laminat.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ITEQ\"><\/span>ITEQ<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Anvendes ofte til netv\u00e6rks- og industrielle form\u00e5l.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Isola\"><\/span>Isola<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Popul\u00e6re i Nordamerika og produkter med h\u00f8j p\u00e5lidelighed.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ventec\"><\/span>Ventec<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Leverer materialer til h\u00f8jhastigheds- og varmestyring.<\/p><p>Forskellige producenter tilbyder tilsvarende kvaliteter, hvilket giver ingeni\u00f8rer mulighed for at optimere omkostningerne og fleksibiliteten i forsyningsk\u00e6den.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_Applications_of_FR4\"><\/span>Typiske anvendelsesomr\u00e5der for FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR4-printkort findes i n\u00e6sten alle brancher inden for elektronikindustrien.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Consumer_Electronics\"><\/span>Forbrugerelektronik<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Smarte enheder<\/li>\n\n<li>Husholdningsapparater<\/li>\n\n<li>Str\u00f8madaptere<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Industrial_Equipment\"><\/span>Industrielt udstyr<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>PLC-systemer<\/li>\n\n<li>Omformere<\/li>\n\n<li>Automatiseringsstyringer<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Automotive_Electronics\"><\/span>Elektronik til biler<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Kontrolmoduler til karrosseri<\/li>\n\n<li>Sensorer<\/li>\n\n<li>Infotainmentsystemer<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Medical_Devices\"><\/span>Medicinsk udstyr<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Overv\u00e5gningsudstyr<\/li>\n\n<li>B\u00e6rbare instrumenter<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Communication_Products\"><\/span>Kommunikationsprodukter<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Routere<\/li>\n\n<li>Afbrydere<\/li>\n\n<li>Netv\u00e6rksmoduler<\/li><\/ul><p>Medmindre der er tale om h\u00f8je frekvenser eller ekstreme temperaturer, er FR4 fortsat et praktisk og \u00f8konomisk valg.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-2.jpg\" alt=\"FR4-printplade\" class=\"wp-image-5915\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_FR4_Is_No_Longer_Enough\"><\/span>N\u00e5r FR4 ikke l\u00e6ngere er nok<span class=\"ez-toc-section-end\"><\/span><\/h2><p>I takt med at datahastighederne og frekvenserne fortsat stiger, st\u00f8der ingeni\u00f8rer ofte p\u00e5 begr\u00e6nsningerne ved konventionelt FR4.<\/p><p>Applikationer som f.eks:<\/p><ul class=\"wp-block-list\"><li>5G-infrastruktur<\/li>\n\n<li>Hurtige servere<\/li>\n\n<li>Radarsystemer<\/li>\n\n<li>RF-moduler<\/li><\/ul><p>kan kr\u00e6ve materialer med:<\/p><ul class=\"wp-block-list\"><li>Lavere dielektrisk tab<\/li>\n\n<li>Mere stabile Dk-v\u00e6rdier<\/li>\n\n<li>Forbedret termisk ydeevne<\/li><\/ul><p>I disse tilf\u00e6lde er Rogers, PTFE, Megtron og andre materialer med lavt tab mere velegnede valgmuligheder.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>OFTE STILLEDE SP\u00d8RGSM\u00c5L<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-1782352025515\"><strong class=\"schema-faq-question\">Sp\u00f8rgsm\u00e5l: Er FR4 det samme som glasfiber?<\/strong> <p class=\"schema-faq-answer\">A: Ikke helt. FR4 er et kompositmateriale fremstillet af glasfiberv\u00e6v og epoxyharpiks. Glasfiberen giver styrke, mens harpiksen s\u00f8rger for isolering.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352037888\"><strong class=\"schema-faq-question\">Sp\u00f8rgsm\u00e5l: Hvad er FR4\u2019s dielektricitetskonstant?<\/strong> <p class=\"schema-faq-answer\">A: De fleste FR4-materialer har en dielektrisk konstant p\u00e5 mellem 4,2 og 4,8, afh\u00e6ngigt af frekvensen og harpikssystemet.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352051553\"><strong class=\"schema-faq-question\">Sp\u00f8rgsm\u00e5l: Er FR4 egnet til design af h\u00f8jhastigheds-printkort?<\/strong> <p class=\"schema-faq-answer\">A: FR4 fungerer godt til mange anvendelser med mellemh\u00f8j hastighed. Kredsl\u00f8b med ekstremt h\u00f8j hastighed eller RF-kredsl\u00f8b kan kr\u00e6ve materialer med lavt tab.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352064778\"><strong class=\"schema-faq-question\">Sp\u00f8rgsm\u00e5l: Hvad betyder \u00bbHigh TG FR4\u00ab?<\/strong> <p class=\"schema-faq-answer\">A: FR4 med h\u00f8j TG d\u00e6kker over materialer med en glasovergangstemperatur p\u00e5 over 170 \u00b0C, hvilket giver forbedret termisk stabilitet.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352077146\"><strong class=\"schema-faq-question\">Sp\u00f8rgsm\u00e5l: Hvilke virksomheder fremstiller FR4-materialer?<\/strong> <p class=\"schema-faq-answer\">A: Blandt de st\u00f8rste leverand\u00f8rer kan n\u00e6vnes Shengyi, Kingboard, ITEQ, Isola og Ventec.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>FR4 er det mest udbredte printpladesubstrat takket v\u00e6re den gode balance mellem elektriske egenskaber, mekanisk styrke og pris. Denne artikel beskriver FR4\u2019s egenskaber, materialer med h\u00f8j TG, de st\u00f8rste leverand\u00f8rer af laminat samt de omr\u00e5der, hvor FR4 fortsat er det foretrukne valg i moderne printpladefremstilling.<\/p>","protected":false},"author":1,"featured_media":5916,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[483,484],"class_list":["post-5912","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-fr4-pcb","tag-pcb-material"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>FR4 PCB Material Explained<\/title>\n<meta name=\"description\" content=\"Discover the properties, advantages, limitations, and applications of FR4 PCB material. Learn why FR4 remains the most widely used substrate in PCB manufacturing.\" \/>\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\/da\/blog\/fr4-pcb-material\/\" \/>\n<meta property=\"og:locale\" content=\"da_DK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FR4 PCB Material Explained\" \/>\n<meta property=\"og:description\" content=\"Discover the properties, advantages, limitations, and applications of FR4 PCB material. Learn why FR4 remains the most widely used substrate in PCB manufacturing.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/\" \/>\n<meta property=\"og:site_name\" content=\"Topfastpcb\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-08T00:43:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"402\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u6258\u666e\u6cd5\u65af\u7279\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Skrevet af\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6258\u666e\u6cd5\u65af\u7279\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimeret l\u00e6setid\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutter\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/\"},\"author\":{\"name\":\"\u6258\u666e\u6cd5\u65af\u7279\",\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a\"},\"headline\":\"FR4 PCB Material Explained\",\"datePublished\":\"2026-07-08T00:43:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/\"},\"wordCount\":799,\"publisher\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg\",\"keywords\":[\"FR4 PCB\",\"PCB Material\"],\"articleSection\":[\"News\"],\"inLanguage\":\"da-DK\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/\",\"url\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/\",\"name\":\"FR4 PCB Material Explained\",\"isPartOf\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg\",\"datePublished\":\"2026-07-08T00:43:00+00:00\",\"description\":\"Discover the properties, advantages, limitations, and applications of FR4 PCB material. Learn why FR4 remains the most widely used substrate in PCB manufacturing.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352025515\"},{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352037888\"},{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352051553\"},{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352064778\"},{\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352077146\"}],\"inLanguage\":\"da-DK\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"da-DK\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage\",\"url\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg\",\"contentUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg\",\"width\":600,\"height\":402,\"caption\":\"FR4 PCB\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.topfastpcb.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"FR4 PCB Material Explained\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.topfastpcb.com\/#website\",\"url\":\"https:\/\/www.topfastpcb.com\/\",\"name\":\"Topfastpcb\",\"description\":\"Topfast Prime Choice for Global Electronics Manufacturing\",\"publisher\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.topfastpcb.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"da-DK\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.topfastpcb.com\/#organization\",\"name\":\"Topfastpcb\",\"url\":\"https:\/\/www.topfastpcb.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"da-DK\",\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png\",\"contentUrl\":\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png\",\"width\":144,\"height\":56,\"caption\":\"Topfastpcb\"},\"image\":{\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a\",\"name\":\"\u6258\u666e\u6cd5\u65af\u7279\",\"sameAs\":[\"http:\/\/www.topfastpcb.com\"],\"url\":\"https:\/\/www.topfastpcb.com\/da\/blog\/author\/admin\/\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352025515\",\"position\":1,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352025515\",\"name\":\"Q: Is FR4 the same as fiberglass?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Not exactly. FR4 is a composite material made from fiberglass cloth and epoxy resin. The fiberglass provides strength, while the resin provides insulation.\",\"inLanguage\":\"da-DK\"},\"inLanguage\":\"da-DK\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352037888\",\"position\":2,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352037888\",\"name\":\"Q: What is the dielectric constant of FR4?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Most FR4 materials have a dielectric constant between 4.2 and 4.8, depending on frequency and resin system.\",\"inLanguage\":\"da-DK\"},\"inLanguage\":\"da-DK\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352051553\",\"position\":3,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352051553\",\"name\":\"Q: Is FR4 suitable for high-speed PCB design?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: FR4 works well for many medium-speed applications. Extremely high-speed or RF circuits may require low-loss materials.\",\"inLanguage\":\"da-DK\"},\"inLanguage\":\"da-DK\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352064778\",\"position\":4,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352064778\",\"name\":\"Q: What does High TG FR4 mean?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: High TG FR4 refers to materials with a glass transition temperature above 170\u00b0C, providing improved thermal stability.\",\"inLanguage\":\"da-DK\"},\"inLanguage\":\"da-DK\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352077146\",\"position\":5,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352077146\",\"name\":\"Q: Which companies manufacture FR4 materials?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A: Major suppliers include Shengyi, Kingboard, ITEQ, Isola, and Ventec.\",\"inLanguage\":\"da-DK\"},\"inLanguage\":\"da-DK\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"FR4 PCB Material Explained","description":"Discover the properties, advantages, limitations, and applications of FR4 PCB material. Learn why FR4 remains the most widely used substrate in PCB manufacturing.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/","og_locale":"da_DK","og_type":"article","og_title":"FR4 PCB Material Explained","og_description":"Discover the properties, advantages, limitations, and applications of FR4 PCB material. Learn why FR4 remains the most widely used substrate in PCB manufacturing.","og_url":"https:\/\/www.topfastpcb.com\/da\/blog\/fr4-pcb-material\/","og_site_name":"Topfastpcb","article_published_time":"2026-07-08T00:43:00+00:00","og_image":[{"width":600,"height":402,"url":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg","type":"image\/jpeg"}],"author":"\u6258\u666e\u6cd5\u65af\u7279","twitter_card":"summary_large_image","twitter_misc":{"Skrevet af":"\u6258\u666e\u6cd5\u65af\u7279","Estimeret l\u00e6setid":"5 minutter"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#article","isPartOf":{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/"},"author":{"name":"\u6258\u666e\u6cd5\u65af\u7279","@id":"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a"},"headline":"FR4 PCB Material Explained","datePublished":"2026-07-08T00:43:00+00:00","mainEntityOfPage":{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/"},"wordCount":799,"publisher":{"@id":"https:\/\/www.topfastpcb.com\/#organization"},"image":{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage"},"thumbnailUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg","keywords":["FR4 PCB","PCB Material"],"articleSection":["News"],"inLanguage":"da-DK"},{"@type":["WebPage","FAQPage"],"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/","url":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/","name":"FR4 PCB Material Explained","isPartOf":{"@id":"https:\/\/www.topfastpcb.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage"},"image":{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage"},"thumbnailUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg","datePublished":"2026-07-08T00:43:00+00:00","description":"Discover the properties, advantages, limitations, and applications of FR4 PCB material. Learn why FR4 remains the most widely used substrate in PCB manufacturing.","breadcrumb":{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352025515"},{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352037888"},{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352051553"},{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352064778"},{"@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352077146"}],"inLanguage":"da-DK","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/"]}]},{"@type":"ImageObject","inLanguage":"da-DK","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#primaryimage","url":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg","contentUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/FR4-PCB-3.jpg","width":600,"height":402,"caption":"FR4 PCB"},{"@type":"BreadcrumbList","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.topfastpcb.com\/"},{"@type":"ListItem","position":2,"name":"FR4 PCB Material Explained"}]},{"@type":"WebSite","@id":"https:\/\/www.topfastpcb.com\/#website","url":"https:\/\/www.topfastpcb.com\/","name":"Topfastpcb","description":"Topfast Prime Choice for Global Electronics Manufacturing","publisher":{"@id":"https:\/\/www.topfastpcb.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.topfastpcb.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"da-DK"},{"@type":"Organization","@id":"https:\/\/www.topfastpcb.com\/#organization","name":"Topfastpcb","url":"https:\/\/www.topfastpcb.com\/","logo":{"@type":"ImageObject","inLanguage":"da-DK","@id":"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png","contentUrl":"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/02\/cropped-topfast-logo.png","width":144,"height":56,"caption":"Topfastpcb"},"image":{"@id":"https:\/\/www.topfastpcb.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.topfastpcb.com\/#\/schema\/person\/39870874f1c329f3cd3693593dbdce3a","name":"\u6258\u666e\u6cd5\u65af\u7279","sameAs":["http:\/\/www.topfastpcb.com"],"url":"https:\/\/www.topfastpcb.com\/da\/blog\/author\/admin\/"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352025515","position":1,"url":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352025515","name":"Q: Is FR4 the same as fiberglass?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Not exactly. FR4 is a composite material made from fiberglass cloth and epoxy resin. The fiberglass provides strength, while the resin provides insulation.","inLanguage":"da-DK"},"inLanguage":"da-DK"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352037888","position":2,"url":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352037888","name":"Q: What is the dielectric constant of FR4?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Most FR4 materials have a dielectric constant between 4.2 and 4.8, depending on frequency and resin system.","inLanguage":"da-DK"},"inLanguage":"da-DK"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352051553","position":3,"url":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352051553","name":"Q: Is FR4 suitable for high-speed PCB design?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: FR4 works well for many medium-speed applications. Extremely high-speed or RF circuits may require low-loss materials.","inLanguage":"da-DK"},"inLanguage":"da-DK"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352064778","position":4,"url":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352064778","name":"Q: What does High TG FR4 mean?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: High TG FR4 refers to materials with a glass transition temperature above 170\u00b0C, providing improved thermal stability.","inLanguage":"da-DK"},"inLanguage":"da-DK"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352077146","position":5,"url":"https:\/\/www.topfastpcb.com\/blog\/fr4-pcb-material\/#faq-question-1782352077146","name":"Q: Which companies manufacture FR4 materials?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Major suppliers include Shengyi, Kingboard, ITEQ, Isola, and Ventec.","inLanguage":"da-DK"},"inLanguage":"da-DK"}]}},"_links":{"self":[{"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/posts\/5912","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/comments?post=5912"}],"version-history":[{"count":1,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/posts\/5912\/revisions"}],"predecessor-version":[{"id":5917,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/posts\/5912\/revisions\/5917"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/media\/5916"}],"wp:attachment":[{"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/media?parent=5912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/categories?post=5912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/da\/wp-json\/wp\/v2\/tags?post=5912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}