{"id":5893,"date":"2026-07-05T08:36:00","date_gmt":"2026-07-05T00:36:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5893"},"modified":"2026-06-24T16:50:40","modified_gmt":"2026-06-24T08:50:40","slug":"high-tg-fr4-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/","title":{"rendered":"Guide till FR4-kretskortmaterial med h\u00f6gt TG-v\u00e4rde"},"content":{"rendered":"<p>FR4 med h\u00f6g TG avser en klass av epoxiglasfiberlaminat med en f\u00f6rh\u00f6jd glas\u00f6verg\u00e5ngstemperatur. I praktiken <a href=\"https:\/\/www.topfastpcb.com\/sv\/pcb-manufacturing\/\">Tillverkning av kretskort<\/a>, TG \u00e4r en av de viktigaste parametrarna som avg\u00f6r hur ett kretskort beter sig under v\u00e4rmebelastning, s\u00e4rskilt vid blyfri l\u00f6dning och l\u00e5ngvarig drift vid h\u00f6ga temperaturer.<\/p><p>J\u00e4mf\u00f6rt med standard-FR4 erbjuder material med h\u00f6gt TG b\u00e4ttre strukturell stabilitet och anv\u00e4nds ofta i till\u00e4mpningar d\u00e4r termisk tillf\u00f6rlitlighet \u00e4r avg\u00f6rande.<\/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\/High-TG-FR4-PCB-Material.jpg\" alt=\"FR4-kretskortmaterial med h\u00f6gt TG-v\u00e4rde\" class=\"wp-image-5894\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-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\">Inneh\u00e5llsf\u00f6rteckning<\/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\/sv\/blog\/high-tg-fr4-pcb\/#What_TG_Means_in_PCB_Materials\" >Vad TG betyder n\u00e4r det g\u00e4ller kretskortmaterial<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Standard_TG_vs_High_TG_FR4\" >FR4 med standard-TG j\u00e4mf\u00f6rt med FR4 med h\u00f6g TG<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Standard_TG_FR4\" >Standard TG FR4<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Mid_TG_FR4\" >Medel-TG FR4<\/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\/sv\/blog\/high-tg-fr4-pcb\/#High_TG_FR4\" >FR4 med h\u00f6gt glas\u00f6verg\u00e5ngstemperatur<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Why_High_TG_FR4_Matters_in_PCB_Manufacturing\" >Varf\u00f6r FR4 med h\u00f6gt TG-v\u00e4rde \u00e4r viktigt vid tillverkning av kretskort<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Electrical_and_Mechanical_Properties\" >Elektriska och mekaniska egenskaper<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/#Where_High_TG_FR4_Is_Used\" >Anv\u00e4ndningsomr\u00e5den f\u00f6r FR4 med h\u00f6gt TG-v\u00e4rde<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/#Automotive_Electronics\" >Elektronik f\u00f6r fordonsindustrin<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Power_Electronics\" >Kraftelektronik<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/#Communication_Systems\" >Kommunikationssystem<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Server_and_Data_Systems\" >Server- och datasystem<\/a><\/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\/sv\/blog\/high-tg-fr4-pcb\/#Manufacturing_Considerations\" >Tillverkningsaspekter<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/#Drilling_and_Via_Reliability\" >Borrning och via-tillf\u00f6rlitlighet<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Lamination_Process\" >Lamineringsprocess<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Reflow_Resistance\" >Reflow-best\u00e4ndighet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/#High_TG_FR4_vs_Standard_FR4\" >FR4 med h\u00f6gt TG-v\u00e4rde j\u00e4mf\u00f6rt med standard-FR4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/sv\/blog\/high-tg-fr4-pcb\/#Limitations_of_High_TG_FR4\" >Begr\u00e4nsningar hos FR4 med h\u00f6gt TG-v\u00e4rde<\/a><\/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\/sv\/blog\/high-tg-fr4-pcb\/#Material_Selection_Strategy\" >Strategi f\u00f6r materialval<\/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\/sv\/blog\/high-tg-fr4-pcb\/#Common_High_TG_FR4_Suppliers\" >Vanliga leverant\u00f6rer av FR4 med h\u00f6gt TG-v\u00e4rde<\/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\/sv\/blog\/high-tg-fr4-pcb\/#FAQ\" >VANLIGA FR\u00c5GOR<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_TG_Means_in_PCB_Materials\"><\/span>Vad TG betyder n\u00e4r det g\u00e4ller kretskortmaterial<span class=\"ez-toc-section-end\"><\/span><\/h2><p>TG (glas\u00f6verg\u00e5ngstemperatur) \u00e4r den punkt vid vilken epoxihartset b\u00f6rjar \u00f6verg\u00e5 fr\u00e5n ett styvt, glasartat tillst\u00e5nd till ett mjukare, gummiliknande tillst\u00e5nd.<\/p><p>Under TG f\u00f6rblir materialet stabilt och mekaniskt starkt. \u00d6ver TG b\u00f6rjar materialet expandera snabbare och f\u00f6rlorar sin styvhet.<\/p><p>N\u00e4r det g\u00e4ller kretskortsdesign p\u00e5verkar detta direkt:<\/p><ul class=\"wp-block-list\"><li>Dimensionell stabilitet<\/li>\n\n<li>Via tillf\u00f6rlitlighet<\/li>\n\n<li>Inriktning av lager<\/li>\n\n<li>L\u00e5ngsiktig mekanisk h\u00e5llfasthet<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Standard_TG_vs_High_TG_FR4\"><\/span>FR4 med standard-TG j\u00e4mf\u00f6rt med FR4 med h\u00f6g TG<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR4-material delas vanligtvis in i tre kategorier:<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Standard_TG_FR4\"><\/span>Standard TG FR4<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>TG vid cirka 130\u2013140 \u00b0C<\/li>\n\n<li>L\u00e4mplig f\u00f6r allm\u00e4n elektronik<\/li>\n\n<li>Vanligt f\u00f6rekommande i billiga konsumentprodukter<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mid_TG_FR4\"><\/span>Medel-TG FR4<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>TG omkring 150\u2013160 \u00b0C<\/li>\n\n<li>Balanserad prestanda och kostnad<\/li>\n\n<li>Anv\u00e4nds inom industriell elektronik<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_TG_FR4\"><\/span>FR4 med h\u00f6gt glas\u00f6verg\u00e5ngstemperatur<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>TG \u2265 170 \u00b0C<\/li>\n\n<li>Utformad f\u00f6r milj\u00f6er med h\u00f6g termisk belastning<\/li>\n\n<li>Vanligt f\u00f6rekommande i till\u00e4mpningar som kr\u00e4ver h\u00f6g tillf\u00f6rlitlighet<\/li><\/ul><p>Material med h\u00f6gt TG-v\u00e4rde beh\u00e5ller sin strukturella integritet under flera reflow-cykler, vilket g\u00f6r dem l\u00e4mpliga f\u00f6r moderna SMT-processer.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_High_TG_FR4_Matters_in_PCB_Manufacturing\"><\/span>Varf\u00f6r FR4 med h\u00f6gt TG-v\u00e4rde \u00e4r viktigt vid tillverkning av kretskort<span class=\"ez-toc-section-end\"><\/span><\/h2><p>I takt med att kretskortskonstruktionerna blir allt mer komplexa har den termiska belastningen under tillverkning och drift \u00f6kat avsev\u00e4rt.<\/p><p>Material med h\u00f6gt TG-v\u00e4rde bidrar till att minska:<\/p><ul class=\"wp-block-list\"><li>Hartsnedbrytning vid l\u00f6dning<\/li>\n\n<li>Risker f\u00f6r delaminering<\/li>\n\n<li>Via sprickbildning<\/li>\n\n<li>Skevhet i flerskiktsstrukturer<\/li><\/ul><p>De f\u00f6rb\u00e4ttrar dessutom den l\u00e5ngsiktiga tillf\u00f6rlitligheten i tuffa milj\u00f6er.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Electrical_and_Mechanical_Properties\"><\/span>Elektriska och mekaniska egenskaper<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR4 med h\u00f6gt TG-v\u00e4rde har i allm\u00e4nhet ungef\u00e4r samma elektriska egenskaper som standard-FR4, men med f\u00f6rb\u00e4ttrade termiska egenskaper.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Fastighet<\/th><th>Typisk r\u00e4ckvidd<\/th><\/tr><tr><td>TG<\/td><td>\u2265170 \u00b0C<\/td><\/tr><tr><td>Dielektricitetskonstant (Dk)<\/td><td>4,2\u20134,7<\/td><\/tr><tr><td>Dissipationsfaktor (Df)<\/td><td>0,015\u20130,020<\/td><\/tr><tr><td>Termisk expansion (Z-axeln)<\/td><td>L\u00e4gre \u00e4n standardv\u00e4rdet f\u00f6r FR4<\/td><\/tr><tr><td>Nedbrytningstemperatur<\/td><td>~300 \u00b0C<\/td><\/tr><\/tbody><\/table><\/figure><p>Den viktigaste f\u00f6rb\u00e4ttringen \u00e4r den minskade utvidgningen l\u00e4ngs Z-axeln, vilket direkt p\u00e5verkar tillf\u00f6rlitligheten.<\/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\/High-TG-FR4-PCB-Material-1.jpg\" alt=\"FR4-kretskortmaterial med h\u00f6gt TG-v\u00e4rde\" class=\"wp-image-5895\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_High_TG_FR4_Is_Used\"><\/span>Anv\u00e4ndningsomr\u00e5den f\u00f6r FR4 med h\u00f6gt TG-v\u00e4rde<span class=\"ez-toc-section-end\"><\/span><\/h2><p>FR4 med h\u00f6gt TG-v\u00e4rde kr\u00e4vs inte f\u00f6r alla produkter, men det blir avg\u00f6rande n\u00e4r tillf\u00f6rlitligheten \u00f6kar eller temperaturen stiger.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Automotive_Electronics\"><\/span>Elektronik f\u00f6r fordonsindustrin<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Moderna fordon \u00e4r i h\u00f6g grad beroende av elektroniska styrsystem som uts\u00e4tts f\u00f6r h\u00f6ga temperaturer under motorhuven.<\/p><p>Applikationerna inkluderar:<\/p><ul class=\"wp-block-list\"><li>Motorstyrningsenheter (ECU)<\/li>\n\n<li>Servostyrningssystem<\/li>\n\n<li>Batterihanteringssystem (BMS)<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Power_Electronics\"><\/span>Kraftelektronik<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Material med h\u00f6gt TG-v\u00e4rde anv\u00e4nds i stor utstr\u00e4ckning inom:<\/p><ul class=\"wp-block-list\"><li>Switchade str\u00f6mf\u00f6rs\u00f6rjningar<\/li>\n\n<li>V\u00e4xelriktare<\/li>\n\n<li>Industriella effektmoduler<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Communication_Systems\"><\/span>Kommunikationssystem<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Anv\u00e4nds i:<\/p><ul class=\"wp-block-list\"><li>Basstationskort<\/li>\n\n<li>Utrustning f\u00f6r n\u00e4tverksinfrastruktur<\/li>\n\n<li>Optiska moduler<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Server_and_Data_Systems\"><\/span>Server- och datasystem<span class=\"ez-toc-section-end\"><\/span><\/h3><p>FR4 med h\u00f6gt TG f\u00f6rekommer ofta i:<\/p><ul class=\"wp-block-list\"><li>Moderkort f\u00f6r server<\/li>\n\n<li>Lagringssystem<\/li>\n\n<li>Datorkort med h\u00f6g densitet<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Considerations\"><\/span>Tillverkningsaspekter<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Anv\u00e4ndningen av material med h\u00f6gt TG-v\u00e4rde p\u00e5verkar tillverkningen av kretskort p\u00e5 flera s\u00e4tt.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Drilling_and_Via_Reliability\"><\/span>Borrning och via-tillf\u00f6rlitlighet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>En mindre utvidgning l\u00e4ngs Z-axeln f\u00f6rb\u00e4ttrar tillf\u00f6rlitligheten hos sprutcylindern vid termisk cykling.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Lamination_Process\"><\/span>Lamineringsprocess<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Material med h\u00f6gt TG-v\u00e4rde kr\u00e4ver ofta:<\/p><ul class=\"wp-block-list\"><li>H\u00f6gre lamineringstryck<\/li>\n\n<li>Styrda uppv\u00e4rmningsprofiler<\/li>\n\n<li>Noggrann styrning av hartfl\u00f6det<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Reflow_Resistance\"><\/span>Reflow-best\u00e4ndighet<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Kretskorten m\u00e5ste klara flera SMT-reflow-cykler utan att det uppst\u00e5r delaminering eller bl\u00e5sor.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_TG_FR4_vs_Standard_FR4\"><\/span>FR4 med h\u00f6gt TG-v\u00e4rde j\u00e4mf\u00f6rt med standard-FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Funktion<\/td><td>Standard FR4<\/td><td>FR4 med h\u00f6gt glas\u00f6verg\u00e5ngstemperatur<\/td><\/tr><tr><td>TG-v\u00e4rde<\/td><td>130\u2013140 \u00b0C<\/td><td>\u2265170 \u00b0C<\/td><\/tr><tr><td>Termisk stabilitet<\/td><td>M\u00e5ttlig<\/td><td>H\u00f6g<\/td><\/tr><tr><td>Kostnad<\/td><td>L\u00e4gre<\/td><td>N\u00e5got h\u00f6gre<\/td><\/tr><tr><td>Tillf\u00f6rlitlighet<\/td><td>Allm\u00e4n anv\u00e4ndning<\/td><td>H\u00f6g tillf\u00f6rlitlighet<\/td><\/tr><tr><td>L\u00e4mplighet f\u00f6r SMT<\/td><td>Grundl\u00e4ggande<\/td><td>Avancerad multipel reflow<\/td><\/tr><\/tbody><\/table><\/figure><p>Kostnadsskillnaden \u00e4r relativt liten j\u00e4mf\u00f6rt med den \u00f6kade tillf\u00f6rlitligheten.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limitations_of_High_TG_FR4\"><\/span>Begr\u00e4nsningar hos FR4 med h\u00f6gt TG-v\u00e4rde<span class=\"ez-toc-section-end\"><\/span><\/h2><p>\u00c4ven om ett h\u00f6gt TG-v\u00e4rde f\u00f6rb\u00e4ttrar de termiska egenskaperna bygger det fortfarande p\u00e5 epoxihartssystem.<\/p><p>Begr\u00e4nsningar inkluderar:<\/p><ul class=\"wp-block-list\"><li>H\u00f6gre dielektrisk f\u00f6rlust vid h\u00f6ga frekvenser<\/li>\n\n<li>Inte l\u00e4mpligt f\u00f6r mikrov\u00e5gsugnar<\/li>\n\n<li>Begr\u00e4nsad prestanda vid frekvenser \u00f6ver flera GHz<\/li>\n\n<li>V\u00e4rmeledningsf\u00f6rm\u00e5gan \u00e4r fortfarande relativt l\u00e5g<\/li><\/ul><p>F\u00f6r RF- eller ultrah\u00f6ghastighetstill\u00e4mpningar rekommenderas material med l\u00e5ga f\u00f6rluster, s\u00e5som Rogers eller Megtron.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Selection_Strategy\"><\/span>Strategi f\u00f6r materialval<span class=\"ez-toc-section-end\"><\/span><\/h2><p>I praktisk kretskortskonstruktion \u00e4r FR4 med h\u00f6gt TG ofta en \u201dmellanv\u00e4g\u201d.<\/p><p>En typisk urvalslogik ser ut s\u00e5 h\u00e4r:<\/p><ul class=\"wp-block-list\"><li>Prisv\u00e4rd elektronik \u2192 Standard FR4<\/li>\n\n<li>Industri\/fordon \u2192 FR4 med h\u00f6gt TG-v\u00e4rde<\/li>\n\n<li>H\u00f6ghastighet \/ RF \u2192 Rogers eller PTFE<\/li>\n\n<li>Backplan f\u00f6r extremt h\u00f6ga hastigheter \u2192 Megtron eller Isolas h\u00f6ghastighetsserier<\/li><\/ul><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\/High-TG-FR4-PCB-Material-2.jpg\" alt=\"FR4-kretskortmaterial med h\u00f6gt TG-v\u00e4rde\" class=\"wp-image-5896\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/High-TG-FR4-PCB-Material-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_High_TG_FR4_Suppliers\"><\/span>Vanliga leverant\u00f6rer av FR4 med h\u00f6gt TG-v\u00e4rde<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Flera laminattillverkare erbjuder material med h\u00f6gt TG som \u00e4r mycket vanliga:<\/p><ul class=\"wp-block-list\"><li>Shengyi<\/li>\n\n<li>Kingboard<\/li>\n\n<li>ITEQ<\/li>\n\n<li>Isola<\/li>\n\n<li>Ventec<\/li><\/ul><p>Varje leverant\u00f6r erbjuder flera TG-kvaliteter f\u00f6r olika prestanda- och kostnadskrav.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>VANLIGA FR\u00c5GOR<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-1782283350742\"><strong class=\"schema-faq-question\">Fr\u00e5ga: \u00c4r FR4 med h\u00f6gt TG-v\u00e4rde alltid b\u00e4ttre \u00e4n vanligt FR4?<\/strong> <p class=\"schema-faq-answer\">A: Inte alltid. H\u00f6gt TG-v\u00e4rde kr\u00e4vs endast n\u00e4r kretskortet uts\u00e4tts f\u00f6r h\u00f6gre termisk belastning eller flera reflow-cykler.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782283361368\"><strong class=\"schema-faq-question\">Fr\u00e5ga: F\u00f6rb\u00e4ttrar FR4 med h\u00f6gt TG-v\u00e4rde signalprestandan?<\/strong> <p class=\"schema-faq-answer\">A: Inte i n\u00e5gon st\u00f6rre utstr\u00e4ckning. Det f\u00f6rb\u00e4ttrar fr\u00e4mst den termiska och mekaniska tillf\u00f6rlitligheten snarare \u00e4n h\u00f6gfrekvensprestandan.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782283520743\"><strong class=\"schema-faq-question\">Fr\u00e5ga: Vilket TG-v\u00e4rde anses vara h\u00f6gt?<\/strong> <p class=\"schema-faq-answer\">A: Vanligtvis klassificeras material med TG \u2265 170 \u00b0C som FR4 med h\u00f6gt TG-v\u00e4rde.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782283531090\"><strong class=\"schema-faq-question\">Fr\u00e5ga: \u00c4r FR4 med h\u00f6gt TG-v\u00e4rde dyrare?<\/strong> <p class=\"schema-faq-answer\">A: Ja, men prisskillnaden \u00e4r vanligtvis m\u00e5ttlig j\u00e4mf\u00f6rt med vanlig FR4.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782283586027\"><strong class=\"schema-faq-question\">Fr\u00e5ga: Kan FR4 med h\u00f6gt TG-v\u00e4rde anv\u00e4ndas vid konstruktion av h\u00f6ghastighetskretskort?<\/strong> <p class=\"schema-faq-answer\">A: Det kan anv\u00e4ndas f\u00f6r till\u00e4mpningar med m\u00e5ttligt h\u00f6g hastighet, men f\u00f6r RF-signaler eller signaler med mycket h\u00f6g hastighet rekommenderas laminat med l\u00e5ga f\u00f6rluster.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>FR4 med h\u00f6gt TG-v\u00e4rde \u00e4r avsett f\u00f6r kretskortstill\u00e4mpningar som kr\u00e4ver f\u00f6rb\u00e4ttrad termisk stabilitet och tillf\u00f6rlitlighet. Det minskar skevhet, f\u00f6rb\u00e4ttrar via-prestandan och anv\u00e4nds i stor utstr\u00e4ckning inom fordonsindustrin, kraftelektronik och serversystem. F\u00f6r RF- och h\u00f6ghastighetskonstruktioner kr\u00e4vs dock fortfarande material med l\u00e5ga f\u00f6rluster.<\/p>","protected":false},"author":1,"featured_media":5897,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[483,484],"class_list":["post-5893","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>High TG FR4 PCB Material Guide<\/title>\n<meta name=\"description\" content=\"Understand High TG FR4 PCB material, including glass transition temperature, thermal reliability, applications, and differences from standard FR4 in PCB manufacturing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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Is high TG FR4 always better than standard FR4?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Not always. High TG is only necessary when the PCB is exposed to higher thermal stress or multiple reflow cycles.","inLanguage":"sv-SE"},"inLanguage":"sv-SE"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283361368","position":2,"url":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283361368","name":"Q: Does high TG FR4 improve signal performance?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Not significantly. It mainly improves thermal and mechanical reliability rather than high-frequency performance.","inLanguage":"sv-SE"},"inLanguage":"sv-SE"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283520743","position":3,"url":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283520743","name":"Q: What TG value is considered high TG?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Typically, materials with TG \u2265 170\u00b0C are classified as high TG FR4.","inLanguage":"sv-SE"},"inLanguage":"sv-SE"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283531090","position":4,"url":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283531090","name":"Q: Is high TG FR4 more expensive?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Yes, but the cost difference is usually moderate compared to standard FR4.","inLanguage":"sv-SE"},"inLanguage":"sv-SE"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283586027","position":5,"url":"https:\/\/www.topfastpcb.com\/blog\/high-tg-fr4-pcb\/#faq-question-1782283586027","name":"Q: Can high TG FR4 be used in high-speed PCB design?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: It can be used for moderate high-speed applications, but for RF or very high-speed signals, low-loss laminates are preferred.","inLanguage":"sv-SE"},"inLanguage":"sv-SE"}]}},"_links":{"self":[{"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/posts\/5893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/comments?post=5893"}],"version-history":[{"count":1,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/posts\/5893\/revisions"}],"predecessor-version":[{"id":5898,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/posts\/5893\/revisions\/5898"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/media\/5897"}],"wp:attachment":[{"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/media?parent=5893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/categories?post=5893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.topfastpcb.com\/sv\/wp-json\/wp\/v2\/tags?post=5893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}