{"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\/fr\/blog\/fr4-pcb-material\/","title":{"rendered":"Tout ce qu'il faut savoir sur le mat\u00e9riau FR4 pour circuits imprim\u00e9s"},"content":{"rendered":"<p>Le FR4 est le mat\u00e9riau de r\u00e9f\u00e9rence pour les cartes de circuits imprim\u00e9s depuis des d\u00e9cennies. Alliant performances \u00e9lectriques, r\u00e9sistance m\u00e9canique et prix abordable, il convient \u00e0 toutes sortes d'applications, des simples produits grand public aux cartes multicouches complexes.<\/p><p>Bien qu'il existe aujourd'hui de nombreux stratifi\u00e9s sp\u00e9cialis\u00e9s, le FR4 reste le mat\u00e9riau de pr\u00e9dilection pour la plupart des <a href=\"https:\/\/www.topfastpcb.com\/fr\/blog\/what-is-a-pcb-design\/\">Conceptions de circuits imprim\u00e9s<\/a> car il offre un bon compromis entre fiabilit\u00e9 et co\u00fbt de fabrication.<\/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=\"Circuit imprim\u00e9 FR4\" 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\">Table des mati\u00e8res<\/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\/fr\/blog\/fr4-pcb-material\/#What_FR4_Means\" >Que signifie \u00ab FR4 \u00bb ?<\/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\/fr\/blog\/fr4-pcb-material\/#How_FR4_Is_Used_in_PCB_Manufacturing\" >Comment le FR4 est-il utilis\u00e9 dans la fabrication des circuits imprim\u00e9s ?<\/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\/fr\/blog\/fr4-pcb-material\/#Single-Sided_Boards\" >Circuits imprim\u00e9s simple face<\/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\/fr\/blog\/fr4-pcb-material\/#Double-Sided_Boards\" >Plaques double face<\/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\/fr\/blog\/fr4-pcb-material\/#Multilayer_Boards\" >Cartes multicouches<\/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\/fr\/blog\/fr4-pcb-material\/#Common_FR4_Material_Properties\" >Propri\u00e9t\u00e9s courantes du mat\u00e9riau FR4<\/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\/fr\/blog\/fr4-pcb-material\/#Standard_TG_and_High_TG_FR4\" >FR4 \u00e0 TG standard et \u00e0 TG \u00e9lev\u00e9<\/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\/fr\/blog\/fr4-pcb-material\/#Standard_TG_Materials\" >Mat\u00e9riaux TG standard<\/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\/fr\/blog\/fr4-pcb-material\/#High_TG_Materials\" >Mat\u00e9riaux \u00e0 TG \u00e9lev\u00e9<\/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\/fr\/blog\/fr4-pcb-material\/#Advantages_of_FR4\" >Avantages du 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\/fr\/blog\/fr4-pcb-material\/#Cost_Efficiency\" >Rapport co\u00fbt-efficacit\u00e9<\/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\/fr\/blog\/fr4-pcb-material\/#Mature_Manufacturing_Process\" >Processus de fabrication \u00e9prouv\u00e9<\/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\/fr\/blog\/fr4-pcb-material\/#Mechanical_Stability\" >Stabilit\u00e9 m\u00e9canique<\/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\/fr\/blog\/fr4-pcb-material\/#Wide_Availability\" >Large disponibilit\u00e9<\/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\/fr\/blog\/fr4-pcb-material\/#Suitable_for_Most_Applications\" >Convient \u00e0 la plupart des applications<\/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\/fr\/blog\/fr4-pcb-material\/#Limitations_of_FR4\" >Limites du 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\/fr\/blog\/fr4-pcb-material\/#Higher_Signal_Loss\" >Perte de signal plus importante<\/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\/fr\/blog\/fr4-pcb-material\/#Limited_Thermal_Conductivity\" >Conductivit\u00e9 thermique limit\u00e9e<\/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\/fr\/blog\/fr4-pcb-material\/#Dk_Variation\" >Variation Dk<\/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\/fr\/blog\/fr4-pcb-material\/#Not_Ideal_for_RF_Applications\" >Ne convient pas aux applications RF<\/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\/fr\/blog\/fr4-pcb-material\/#Popular_FR4_Material_Brands\" >Marques populaires de FR4<\/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\/fr\/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\/fr\/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\/fr\/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\/fr\/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\/fr\/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\/fr\/blog\/fr4-pcb-material\/#Typical_Applications_of_FR4\" >Applications typiques du 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\/fr\/blog\/fr4-pcb-material\/#Consumer_Electronics\" >\u00c9lectronique grand public<\/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\/fr\/blog\/fr4-pcb-material\/#Industrial_Equipment\" >\u00c9quipement industriel<\/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\/fr\/blog\/fr4-pcb-material\/#Automotive_Electronics\" >\u00c9lectronique automobile<\/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\/fr\/blog\/fr4-pcb-material\/#Medical_Devices\" >Dispositifs m\u00e9dicaux<\/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\/fr\/blog\/fr4-pcb-material\/#Communication_Products\" >Produits de communication<\/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\/fr\/blog\/fr4-pcb-material\/#When_FR4_Is_No_Longer_Enough\" >Quand le FR4 ne suffit plus<\/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\/fr\/blog\/fr4-pcb-material\/#FAQ\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_FR4_Means\"><\/span>Que signifie \u00ab FR4 \u00bb ?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>\u00ab FR \u00bb signifie \u00ab ignifuge \u00bb, tandis que le chiffre 4 fait r\u00e9f\u00e9rence \u00e0 la classification d\u00e9finie par la norme NEMA.<\/p><p>Le FR4 est constitu\u00e9 d'un tissu en fibre de verre impr\u00e9gn\u00e9 de r\u00e9sine \u00e9poxy. Apr\u00e8s durcissement sous l'effet de la chaleur et de la pression, ce mat\u00e9riau forme un substrat isolant rigide capable de supporter des couches de cuivre et des composants \u00e9lectroniques.<\/p><p>Ce support propose :<\/p><ul class=\"wp-block-list\"><li>Bonne r\u00e9sistance m\u00e9canique<\/li>\n\n<li>Propri\u00e9t\u00e9s \u00e9lectriques stables<\/li>\n\n<li>Excellente isolation<\/li>\n\n<li>R\u00e9sistance \u00e0 l'humidit\u00e9<\/li>\n\n<li>Faible co\u00fbt de fabrication<\/li><\/ul><p>Ces caract\u00e9ristiques expliquent pourquoi le FR4 domine le <a href=\"https:\/\/www.topfastpcb.com\/fr\/pcb-industries\/\">Secteur des circuits imprim\u00e9s<\/a>.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_FR4_Is_Used_in_PCB_Manufacturing\"><\/span>Comment le FR4 est-il utilis\u00e9 dans la fabrication des circuits imprim\u00e9s ?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Le FR4 sert de mat\u00e9riau di\u00e9lectrique entre les couches de cuivre.<\/p><p>Parmi les structures typiques, on peut citer :<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Single-Sided_Boards\"><\/span>Circuits imprim\u00e9s simple face<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Utilis\u00e9 dans :<\/p><ul class=\"wp-block-list\"><li>Adaptateurs secteur<\/li>\n\n<li>Appareils \u00e9lectrom\u00e9nagers<\/li>\n\n<li>Produits LED<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Double-Sided_Boards\"><\/span>Plaques double face<span class=\"ez-toc-section-end\"><\/span><\/h3><p>On le trouve couramment dans :<\/p><ul class=\"wp-block-list\"><li>Contr\u00f4leurs industriels<\/li>\n\n<li>\u00c9lectronique automobile<\/li>\n\n<li>\u00c9quipement de communication<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Multilayer_Boards\"><\/span>Cartes multicouches<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Largement utilis\u00e9 pour :<\/p><ul class=\"wp-block-list\"><li>Serveurs<\/li>\n\n<li>Dispositifs m\u00e9dicaux<\/li>\n\n<li>\u00c9quipement de r\u00e9seau<\/li>\n\n<li>Syst\u00e8mes embarqu\u00e9s<\/li><\/ul><p>Les cartes multicouches modernes, comptant de 4 \u00e0 20 couches, sont g\u00e9n\u00e9ralement fabriqu\u00e9es \u00e0 partir de stratifi\u00e9s FR4 et de pr\u00e9impr\u00e9gn\u00e9s.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_FR4_Material_Properties\"><\/span>Propri\u00e9t\u00e9s courantes du mat\u00e9riau FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Bien que les sp\u00e9cifications varient d'un fabricant \u00e0 l'autre, les mat\u00e9riaux FR4 standard pr\u00e9sentent g\u00e9n\u00e9ralement les caract\u00e9ristiques suivantes.<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Propri\u00e9t\u00e9<\/th><th>Valeur typique<\/th><\/tr><tr><td>Constante di\u00e9lectrique (Dk)<\/td><td>4.2-4.8<\/td><\/tr><tr><td>Facteur de dissipation (Df)<\/td><td>0.015-0.025<\/td><\/tr><tr><td>Temp\u00e9rature de transition vitreuse<\/td><td>130\u2013170 \u00b0C<\/td><\/tr><tr><td>Conductivit\u00e9 thermique<\/td><td>0,3\u20130,4 W\/m\u00b7K<\/td><\/tr><tr><td>R\u00e9sistivit\u00e9 volumique<\/td><td>&gt;10\u00b9\u00b2 \u03a9\u00b7cm<\/td><\/tr><tr><td>Indice d'inflammabilit\u00e9<\/td><td>UL94 V-0<\/td><\/tr><\/tbody><\/table><\/figure><p>Ces valeurs conviennent \u00e0 la plupart des produits \u00e9lectroniques fonctionnant \u00e0 basse et moyenne vitesse.<\/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=\"Circuit imprim\u00e9 FR4\" 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 \u00e0 TG standard et \u00e0 TG \u00e9lev\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h2><p>L'un des param\u00e8tres importants du FR4 est la temp\u00e9rature de transition vitreuse (TG).<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Standard_TG_Materials\"><\/span>Mat\u00e9riaux TG standard<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Les valeurs typiques de la temp\u00e9rature de transition vitreuse (TG) varient entre 130 \u00b0C et 140 \u00b0C.<\/p><p>Les applications comprennent<\/p><ul class=\"wp-block-list\"><li>Electronique grand public<\/li>\n\n<li>Appareils \u00e9lectrom\u00e9nagers<\/li>\n\n<li>Produits industriels g\u00e9n\u00e9raux<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_TG_Materials\"><\/span>Mat\u00e9riaux \u00e0 TG \u00e9lev\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Les stratifi\u00e9s \u00e0 TG \u00e9lev\u00e9 pr\u00e9sentent g\u00e9n\u00e9ralement des valeurs sup\u00e9rieures \u00e0 170 \u00b0C.<\/p><p>Ils offrent de meilleures performances dans les cas suivants :<\/p><ul class=\"wp-block-list\"><li>Assemblage sans plomb<\/li>\n\n<li>Temp\u00e9ratures de fonctionnement \u00e9lev\u00e9es<\/li>\n\n<li>Cycles de refusion multiples<\/li><\/ul><p>Les mat\u00e9riaux \u00e0 TG \u00e9lev\u00e9 se retrouvent couramment dans :<\/p><ul class=\"wp-block-list\"><li>\u00c9lectronique automobile<\/li>\n\n<li>Alimentations \u00e9lectriques<\/li>\n\n<li>Serveurs<\/li>\n\n<li>\u00c9quipements de t\u00e9l\u00e9communications<\/li><\/ul><p><em>Lien interne : <a href=\"https:\/\/www.topfastpcb.com\/fr\/blog\/high-tg-fr4-pcb\/\">Circuit imprim\u00e9 FR4 \u00e0 TG \u00e9lev\u00e9<\/a><\/em><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advantages_of_FR4\"><\/span>Avantages du FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Plusieurs facteurs font du FR4 le substrat le plus largement utilis\u00e9 dans ce secteur.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cost_Efficiency\"><\/span>Rapport co\u00fbt-efficacit\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Le FR4 est nettement moins cher que les stratifi\u00e9s RF et les mat\u00e9riaux sp\u00e9cialis\u00e9s.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mature_Manufacturing_Process\"><\/span>Processus de fabrication \u00e9prouv\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Pratiquement tous les fabricants de circuits imprim\u00e9s proposent la fabrication de circuits en FR4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Mechanical_Stability\"><\/span>Stabilit\u00e9 m\u00e9canique<span class=\"ez-toc-section-end\"><\/span><\/h3><p>La structure en fibre de verre offre une excellente rigidit\u00e9 et une grande stabilit\u00e9 dimensionnelle.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wide_Availability\"><\/span>Large disponibilit\u00e9<span class=\"ez-toc-section-end\"><\/span><\/h3><p>De grands fournisseurs tels que Shengyi, Kingboard, ITEQ et Isola proposent de nombreuses gammes de produits FR4.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Suitable_for_Most_Applications\"><\/span>Convient \u00e0 la plupart des applications<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Pour les fr\u00e9quences inf\u00e9rieures \u00e0 plusieurs gigahertz, le FR4 r\u00e9pond g\u00e9n\u00e9ralement aux exigences \u00e9lectriques sans entra\u00eener de co\u00fbts excessifs.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limitations_of_FR4\"><\/span>Limites du FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Malgr\u00e9 sa polyvalence, le FR4 ne convient pas \u00e0 toutes les applications.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Higher_Signal_Loss\"><\/span>Perte de signal plus importante<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Par rapport aux stratifi\u00e9s \u00e0 faibles pertes, le FR4 pr\u00e9sente une perte di\u00e9lectrique plus \u00e9lev\u00e9e aux hautes fr\u00e9quences.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limited_Thermal_Conductivity\"><\/span>Conductivit\u00e9 thermique limit\u00e9e<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Les performances en mati\u00e8re de dissipation thermique sont relativement faibles.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dk_Variation\"><\/span>Variation Dk<span class=\"ez-toc-section-end\"><\/span><\/h3><p>La constante di\u00e9lectrique varie en fonction de la fr\u00e9quence et des conditions de fabrication, ce qui peut avoir une incidence sur la stabilit\u00e9 de l'imp\u00e9dance.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Not_Ideal_for_RF_Applications\"><\/span>Ne convient pas aux applications RF<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Les conceptions dans les domaines des micro-ondes et des ondes millim\u00e9triques n\u00e9cessitent souvent des mat\u00e9riaux sp\u00e9cialis\u00e9s.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Popular_FR4_Material_Brands\"><\/span>Marques populaires de FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Plusieurs fabricants de stratifi\u00e9s dominent le march\u00e9.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Shengyi\"><\/span>Shengyi<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Largement utilis\u00e9 en Asie et r\u00e9put\u00e9 pour sa qualit\u00e9 constante.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kingboard\"><\/span>Kingboard<span class=\"ez-toc-section-end\"><\/span><\/h3><p>L'un des plus grands fournisseurs mondiaux de stratifi\u00e9s pour circuits imprim\u00e9s.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ITEQ\"><\/span>ITEQ<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Souvent utilis\u00e9 pour les r\u00e9seaux et les applications industrielles.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Isola\"><\/span>Isola<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Des produits tr\u00e8s appr\u00e9ci\u00e9s en Am\u00e9rique du Nord et d'une grande fiabilit\u00e9.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ventec\"><\/span>Ventec<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Fournit des mat\u00e9riaux destin\u00e9s \u00e0 la gestion thermique et \u00e0 la transmission \u00e0 haute vitesse.<\/p><p>Diff\u00e9rents fabricants proposent des nuances \u00e9quivalentes, ce qui permet aux ing\u00e9nieurs d'optimiser les co\u00fbts et la flexibilit\u00e9 de la cha\u00eene d'approvisionnement.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Typical_Applications_of_FR4\"><\/span>Applications typiques du FR4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Les circuits imprim\u00e9s FR4 sont pr\u00e9sents dans pratiquement tous les secteurs de l'\u00e9lectronique.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Consumer_Electronics\"><\/span>\u00c9lectronique grand public<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Appareils connect\u00e9s<\/li>\n\n<li>Appareils \u00e9lectrom\u00e9nagers<\/li>\n\n<li>Adaptateurs secteur<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Industrial_Equipment\"><\/span>\u00c9quipement industriel<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Syst\u00e8mes PLC<\/li>\n\n<li>Onduleurs<\/li>\n\n<li>Contr\u00f4leurs d'automatisation<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Automotive_Electronics\"><\/span>\u00c9lectronique automobile<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Modules de contr\u00f4le de la carrosserie<\/li>\n\n<li>Capteurs<\/li>\n\n<li>Syst\u00e8mes d'infodivertissement<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Medical_Devices\"><\/span>Dispositifs m\u00e9dicaux<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Mat\u00e9riel de surveillance<\/li>\n\n<li>Instruments portables<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Communication_Products\"><\/span>Produits de communication<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Routeurs<\/li>\n\n<li>Interrupteurs<\/li>\n\n<li>Modules r\u00e9seau<\/li><\/ul><p>\u00c0 moins d'\u00eatre confront\u00e9 \u00e0 des fr\u00e9quences \u00e9lev\u00e9es ou \u00e0 des temp\u00e9ratures extr\u00eames, le FR4 reste un choix pratique et \u00e9conomique.<\/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=\"Circuit imprim\u00e9 FR4\" 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>Quand le FR4 ne suffit plus<span class=\"ez-toc-section-end\"><\/span><\/h2><p>\u00c0 mesure que les d\u00e9bits de donn\u00e9es et les fr\u00e9quences ne cessent d'augmenter, les ing\u00e9nieurs se heurtent souvent aux limites du FR4 classique.<\/p><p>Applications telles que :<\/p><ul class=\"wp-block-list\"><li>Infrastructure 5G<\/li>\n\n<li>Serveurs \u00e0 haute vitesse<\/li>\n\n<li>Syst\u00e8mes radar<\/li>\n\n<li>Modules RF<\/li><\/ul><p>peut n\u00e9cessiter des mat\u00e9riaux pr\u00e9sentant les caract\u00e9ristiques suivantes :<\/p><ul class=\"wp-block-list\"><li>Perte di\u00e9lectrique plus faible<\/li>\n\n<li>Des valeurs de Dk plus stables<\/li>\n\n<li>Am\u00e9lioration des performances thermiques<\/li><\/ul><p>Dans ces cas-l\u00e0, le Rogers, le PTFE, le Megtron et d'autres mat\u00e9riaux \u00e0 faibles pertes constituent des options plus adapt\u00e9es.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>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-1782352025515\"><strong class=\"schema-faq-question\">Q : Le FR4, c'est la m\u00eame chose que la fibre de verre ?<\/strong> <p class=\"schema-faq-answer\">R : Pas tout \u00e0 fait. Le FR4 est un mat\u00e9riau composite constitu\u00e9 de tissu en fibre de verre et de r\u00e9sine \u00e9poxy. La fibre de verre assure la r\u00e9sistance, tandis que la r\u00e9sine assure l'isolation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352037888\"><strong class=\"schema-faq-question\">Q : Quelle est la constante di\u00e9lectrique du FR4 ?<\/strong> <p class=\"schema-faq-answer\">R : La plupart des mat\u00e9riaux FR4 pr\u00e9sentent une constante di\u00e9lectrique comprise entre 4,2 et 4,8, en fonction de la fr\u00e9quence et du type de r\u00e9sine utilis\u00e9.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352051553\"><strong class=\"schema-faq-question\">Q : Le FR4 est-il adapt\u00e9 \u00e0 la conception de circuits imprim\u00e9s \u00e0 haute vitesse ?<\/strong> <p class=\"schema-faq-answer\">R : Le FR4 convient bien \u00e0 de nombreuses applications \u00e0 vitesse moyenne. Les circuits \u00e0 tr\u00e8s haute vitesse ou les circuits RF peuvent n\u00e9cessiter des mat\u00e9riaux \u00e0 faibles pertes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352064778\"><strong class=\"schema-faq-question\">Q : Que signifie \u00ab FR4 \u00e0 TG \u00e9lev\u00e9 \u00bb ?<\/strong> <p class=\"schema-faq-answer\">R : Le FR4 \u00e0 TG \u00e9lev\u00e9e d\u00e9signe des mat\u00e9riaux dont la temp\u00e9rature de transition vitreuse est sup\u00e9rieure \u00e0 170 \u00b0C, ce qui leur conf\u00e8re une meilleure stabilit\u00e9 thermique.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782352077146\"><strong class=\"schema-faq-question\">Q : Quelles sont les entreprises qui fabriquent des mat\u00e9riaux FR4 ?<\/strong> <p class=\"schema-faq-answer\">R : Parmi les principaux fournisseurs, on peut citer Shengyi, Kingboard, ITEQ, Isola et Ventec.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>Le FR4 est le substrat de circuit imprim\u00e9 le plus couramment utilis\u00e9 gr\u00e2ce \u00e0 son \u00e9quilibre entre performances \u00e9lectriques, r\u00e9sistance m\u00e9canique et co\u00fbt. Cet article pr\u00e9sente les propri\u00e9t\u00e9s du FR4, les mat\u00e9riaux \u00e0 haute temp\u00e9rature de transition vitreuse (TG), les principaux fournisseurs de stratifi\u00e9s, ainsi que les domaines dans lesquels le FR4 reste le choix privil\u00e9gi\u00e9 dans la fabrication moderne de circuits imprim\u00e9s.<\/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. 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