[{"data":1,"prerenderedAt":377},["ShallowReactive",2],{"blog-fr4-material-properties-fr":3,"header-nav-fr":47},{"title":4,"description":5,"date":6,"lastUpdated":6,"category":7,"image":8,"readingTime":9,"wordCount":10,"timeRequired":11,"htmlContent":12,"tags":13,"slug":21,"jsonld":22},"Proprietes du materiau FR4 : Dk, Tg, densite, fiche technique CTE","Qu'est-ce que le FR-4 et ses parametres cles : constante dielectrique, Tg, Td, CTE, densite et conductivite thermique, plus choix du FR-4 haute Tg.","2026-10-09","materials","/assets/img/pcb/fr4/pcb-fr4-pcb-hero.webp",4,716,"PT4M","\u003Ch2 id=\"points-cles-a-retenir\" data-anchor-en=\"key-takeaways\">Points cles a retenir\u003C/h2>\n\u003Cul>\n\u003Cli>\u003Cstrong>Signification de FR-4 :\u003C/strong> 'FR' signifie \u003Cstrong>Flame Retardant\u003C/strong> (ignifuge), et '4' designe la resine epoxyde renforcee de tissu de verre conforme aux normes NEMA LI 1-1998 et UL94 V-0.\u003C/li>\n\u003Cli>\u003Cstrong>Constante dielectrique du FR4 (Dk) :\u003C/strong> Se situe typiquement entre \u003Cstrong>4,2 et 4,7 a 1 GHz\u003C/strong>, diminuant avec l'augmentation de la frequence. Le Dk varie selon le ratio verre/resine.\u003C/li>\n\u003Cli>\u003Cstrong>Seuils thermiques (Tg, Td) :\u003C/strong> Le FR-4 standard a une temperature de transition vitreuse ($T_g$) de $130\\text{--}140^\\circ\\text{C}$, le Mid-$T_g$ est a $150^\\circ\\text{C}$ et le High-$T_g$ atteint $170\\text{--}180^\\circ\\text{C}$, indispensable pour le brasage sans plomb ($260^\\circ\\text{C}$).\u003C/li>\n\u003Cli>\u003Cstrong>Coefficient de dilatation thermique (CTE) :\u003C/strong> Sur l'axe Z, le FR-4 standard se dilate a environ $50\\text{--}70\\text{ ppm/}^\\circ\\text{C}$ sous $T_g$, passant a $250\\text{--}300\\text{ ppm/}^\\circ\\text{C}$ au-dessus de $T_g$.\u003C/li>\n\u003Cli>\u003Cstrong>Proprietes mecaniques :\u003C/strong> Densite nominale de \u003Cstrong>$1,85\\text{ g/cm}^3$\u003C/strong>, module d'Young de \u003Cstrong>22--24 GPa\u003C/strong> et conductivite thermique moderee de \u003Cstrong>$0,25\\text{--}0,35\\text{ W/m}\\cdot\\text{K}$\u003C/strong>.\u003C/li>\n\u003C/ul>\n\u003Cdiv data-component=\"BlogQuickQuoteInline\">\u003C/div>\n\n\u003Ch2 id=\"qu39est-ce-que-le-fr-4-composition-et-categories\" data-anchor-en=\"what-is-fr-4-composition-and-grades\">Qu'est-ce que le FR-4 ? Composition et categories\u003C/h2>\n\u003Cp>Le terme \u003Cstrong>materiau PCB FR4\u003C/strong> definit un composite combinant deux elements fondamentaux :\u003C/p>\n\u003Col>\n\u003Cli>\u003Cstrong>Tissu de fibre de verre tissee :\u003C/strong> Des fils de verre E tisses selon des motifs standardises (106, 1080, 2116, 7628) offrent resistance mecanique et stabilite dimensionnelle.\u003C/li>\n\u003Cli>\u003Cstrong>Matrice en resine epoxyde :\u003C/strong> Un polymere thermodurcissable charge de retardateurs de flamme bromes ou sans halogene assurant l'isolation electrique et le maintien du cuivre.\u003C/li>\n\u003C/ol>\n\u003Ch2 id=\"fiche-technique-des-proprietes-du-materiau-fr4\" data-anchor-en=\"common-fr-4-grades-in-industry\">Fiche technique des proprietes du materiau FR4\u003C/h2>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth>Propriete\u003C/th>\n\u003Cth>Methode de test (IPC-TM-650)\u003C/th>\n\u003Cth>FR-4 standard (Mid-Tg)\u003C/th>\n\u003Cth>FR-4 High-Tg\u003C/th>\n\u003Cth>Unite typique\u003C/th>\n\u003C/tr>\n\u003C/thead>\n\u003Ctbody>\u003Ctr>\n\u003Ctd>Glass Transition Temp ($T_g$)\u003C/td>\n\u003Ctd>2.4.24 (DSC)\u003C/td>\n\u003Ctd>135 - 150 °C\u003C/td>\n\u003Ctd>170 - 180 °C\u003C/td>\n\u003Ctd>°C\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Decomposition Temp ($T_d$)\u003C/td>\n\u003Ctd>2.4.24.6 (TGA 5% loss)\u003C/td>\n\u003Ctd>310 - 325 °C\u003C/td>\n\u003Ctd>340 - 355 °C\u003C/td>\n\u003Ctd>°C\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Time to Delamination (T260)\u003C/td>\n\u003Ctd>2.4.24.1 (TMA)\u003C/td>\n\u003Ctd>5 - 15 min\u003C/td>\n\u003Ctd>30 - 60+ min\u003C/td>\n\u003Ctd>min\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Time to Delamination (T288)\u003C/td>\n\u003Ctd>2.4.24.1 (TMA)\u003C/td>\n\u003Ctd>0 - 2 min\u003C/td>\n\u003Ctd>10 - 30 min\u003C/td>\n\u003Ctd>min\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Z-Axis CTE (Below $T_g$)\u003C/td>\n\u003Ctd>2.4.24 (TMA)\u003C/td>\n\u003Ctd>50 - 70\u003C/td>\n\u003Ctd>40 - 50\u003C/td>\n\u003Ctd>ppm/°C\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Z-Axis CTE (Above $T_g$)\u003C/td>\n\u003Ctd>2.4.24 (TMA)\u003C/td>\n\u003Ctd>250 - 300\u003C/td>\n\u003Ctd>220 - 260\u003C/td>\n\u003Ctd>ppm/°C\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Z-Axis Expansion (50-260°C)\u003C/td>\n\u003Ctd>2.4.24 (TMA)\u003C/td>\n\u003Ctd>4.0 - 5.5%\u003C/td>\n\u003Ctd>2.3 - 3.2%\u003C/td>\n\u003Ctd>%\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Dielectric Constant ($D_k$, 1 GHz)\u003C/td>\n\u003Ctd>2.5.5.9\u003C/td>\n\u003Ctd>4.3 - 4.6\u003C/td>\n\u003Ctd>4.2 - 4.5\u003C/td>\n\u003Ctd>-\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Loss Tangent ($D_f$, 1 GHz)\u003C/td>\n\u003Ctd>2.5.5.9\u003C/td>\n\u003Ctd>0.016 - 0.022\u003C/td>\n\u003Ctd>0.012 - 0.018\u003C/td>\n\u003Ctd>-\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Volume Resistivity\u003C/td>\n\u003Ctd>2.5.17\u003C/td>\n\u003Ctd>10^8 - 10^9\u003C/td>\n\u003Ctd>10^8 - 10^9\u003C/td>\n\u003Ctd>MΩ·cm\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Surface Resistivity\u003C/td>\n\u003Ctd>2.5.17\u003C/td>\n\u003Ctd>10^7 - 10^8\u003C/td>\n\u003Ctd>10^7 - 10^8\u003C/td>\n\u003Ctd>MΩ\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Dielectric Breakdown\u003C/td>\n\u003Ctd>2.5.6\u003C/td>\n\u003Ctd>> 40\u003C/td>\n\u003Ctd>> 45\u003C/td>\n\u003Ctd>kV\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Flexural Strength (Lengthwise)\u003C/td>\n\u003Ctd>2.4.4\u003C/td>\n\u003Ctd>> 450\u003C/td>\n\u003Ctd>> 500\u003C/td>\n\u003Ctd>MPa\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Peel Strength (1 oz copper)\u003C/td>\n\u003Ctd>2.4.8\u003C/td>\n\u003Ctd>1.4 - 1.8 (8 - 10)\u003C/td>\n\u003Ctd>1.4 - 1.8 (8 - 10)\u003C/td>\n\u003Ctd>N/mm (lb/in)\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Moisture Absorption\u003C/td>\n\u003Ctd>2.6.2.1\u003C/td>\n\u003Ctd>0.15 - 0.25\u003C/td>\n\u003Ctd>0.10 - 0.18\u003C/td>\n\u003Ctd>%\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Thermal Conductivity\u003C/td>\n\u003Ctd>ASTM E1461\u003C/td>\n\u003Ctd>0.25 - 0.35\u003C/td>\n\u003Ctd>0.30 - 0.40\u003C/td>\n\u003Ctd>W/m·K\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd>Flammability Rating\u003C/td>\n\u003Ctd>UL 94\u003C/td>\n\u003Ctd>V-0\u003C/td>\n\u003Ctd>V-0\u003C/td>\n\u003Ctd>Class\u003C/td>\n\u003C/tr>\n\u003C/tbody>\u003C/table>\n\u003Ch2 id=\"questions-frequemment-posees-sur-le-fr-4\" data-anchor-en=\"fr4-material-properties-datasheet-at-a-glance\">Questions frequemment posees sur le FR-4\u003C/h2>\n\u003Ch3 id=\"quelle-est-la-densite-du-fr4\" data-anchor-en=\"electrical-performance-fr4-dielectric-constant-and-loss\">Quelle est la densite du FR4 ?\u003C/h3>\n\u003Cp>La densite du composite FR-4 durci est generalement de \u003Cstrong>1,85 g/cm³\u003C/strong> (environ 0,067 lb/in³).\u003C/p>\n\u003Ch3 id=\"quelle-est-la-constante-dielectrique-du-fr-4-a-1-ghz\" data-anchor-en=\"1-dk-variations-by-glass-style\">Quelle est la constante dielectrique du FR-4 a 1 GHz ?\u003C/h3>\n\u003Cp>A 1 GHz, le $Dk$ relatif du FR-4 standard est couramment compris entre \u003Cstrong>4,2 et 4,5\u003C/strong>, diminuant legerement aux frequences micro-ondes.\u003C/p>\n\u003Ch3 id=\"quand-faut-il-choisir-le-fr-4-high-tg-plutot-que-le-standard\" data-anchor-en=\"2-high-frequency-attenuation\">Quand faut-il choisir le FR-4 High-Tg plutot que le standard ?\u003C/h3>\n\u003Cp>Le FR-4 High-Tg ($T_g \\ge 170^\\circ\\text{C}$) est indispensable pour l'assemblage sans plomb RoHS, les circuits multicouches de 6 couches ou plus et les applications a environnement thermique exigeant.\u003C/p>\n\u003Ch2 id=\"ressources-associees-et-guides-techniques\" data-anchor-en=\"thermal-properties-tg-td-and-cte\">Ressources associées et guides techniques\u003C/h2>\n\u003Cul>\n\u003Cli>\u003Ca href=\"/fr/blog/glass-transition-temperature-tg\">/blog/glass-transition-temperature-tg\u003C/a> - Deep dive into Tg thermal reliability thresholds\u003C/li>\n\u003Cli>\u003Ca href=\"/fr/blog/what-is-dielectric-constant\">/blog/what-is-dielectric-constant\u003C/a> - Dielectric constant fundamentals and impedance control\u003C/li>\n\u003Cli>\u003Ca href=\"/fr/materials\">/materials\u003C/a> - Complete substrate material catalog and high-frequency laminates\u003C/li>\n\u003Cli>\u003Ca href=\"/fr/pcb\">/pcb\u003C/a> - Full multilayer rigid PCB fabrication specifications and tolerances\u003C/li>\n\u003C/ul>\n\n\u003Csection class=\"related-links\" aria-label=\"Related\">\u003Ch3>Related links\u003C/h3>\u003Cul>\u003Cli>\u003Ca href=\"/fr/blog/glass-transition-temperature-tg\">/blog/glass-transition-temperature-tg\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/fr/blog/what-is-dielectric-constant\">/blog/what-is-dielectric-constant\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/fr/materials\">/materials\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/fr/pcb\">/pcb\u003C/a>\u003C/li>\u003C/ul>\u003C/section>",[14,15,16,17,18,19,20],"FR4 Material","FR4 Properties","PCB Substrate","FR4 Dielectric Constant","FR4 Tg","Thermal Conductivity","PCB Stackup","fr4-material-properties",{"blog":23,"breadcrumb":32,"faq":46},{"@context":24,"@type":25,"headline":4,"description":5,"image":8,"url":26,"datePublished":6,"dateModified":6,"timeRequired":11,"keywords":27,"articleSection":7,"author":28,"publisher":31},"https://schema.org","BlogPosting","https://aptpcb.com/fr/blog/fr4-material-properties","FR4 Material, FR4 Properties, PCB Substrate, FR4 Dielectric Constant, FR4 Tg, Thermal Conductivity, PCB Stackup",{"@type":29,"name":30},"Organization","APTPCB",{"@type":29,"name":30},{"@context":24,"@type":33,"itemListElement":34},"BreadcrumbList",[35,40,44],{"@type":36,"position":37,"name":38,"item":39},"ListItem",1,"Home","https://aptpcb.com/",{"@type":36,"position":41,"name":42,"item":43},2,"Blog","https://aptpcb.com/fr/blog",{"@type":36,"position":45,"name":21,"item":26},3,null,{"pcbManufacturingColumns":48,"capabilityColumns":172,"resourceColumns":208,"pcbaColumns":252},[49,97,126,155],{"heading":50,"links":51},"Familles de produits PCB",[52,55,58,61,64,67,70,73,76,79,82,85,88,91,94],{"label":53,"path":54},"PCB FR-4","/pcb/fr4-pcb",{"label":56,"path":57},"PCB haute vitesse","/pcb/high-speed-pcb",{"label":59,"path":60},"PCB multicouches","/pcb/multilayer-pcb",{"label":62,"path":63},"PCB HDI","/pcb/hdi-pcb",{"label":65,"path":66},"PCB flexible","/pcb/flex-pcb",{"label":68,"path":69},"PCB rigid-flex","/pcb/rigid-flex-pcb",{"label":71,"path":72},"PCB céramique","/pcb/ceramic-pcb",{"label":74,"path":75},"PCB cuivre épais","/pcb/heavy-copper-pcb",{"label":77,"path":78},"PCB haute dissipation thermique","/pcb/high-thermal-pcb",{"label":80,"path":81},"PCB d’antenne","/pcb/antenna-pcb",{"label":83,"path":84},"PCB haute fréquence","/pcb/high-frequency-pcb",{"label":86,"path":87},"PCB micro-ondes","/pcb/microwave-pcb",{"label":89,"path":90},"PCB à noyau métallique","/pcb/metal-core-pcb",{"label":92,"path":93},"PCB High-Tg","/pcb/high-tg-pcb",{"label":95,"path":96},"PCB backplane","/pcb/backplane-pcb",{"sections":98},[99],{"heading":100,"links":101},"RF & matériaux",[102,105,108,111,114,117,120,123],{"label":103,"path":104},"PCB Rogers","/materials/rf-rogers",{"label":106,"path":107},"Taconic PCB","/materials/taconic-pcb",{"label":109,"path":110},"Teflon PCB","/materials/teflon-pcb",{"label":112,"path":113},"Arlon PCB","/materials/arlon-pcb",{"label":115,"path":116},"Megtron PCB","/materials/megtron-pcb",{"label":118,"path":119},"ISOLA PCB","/materials/isola-pcb",{"label":121,"path":122},"FR-4 Spread Glass","/materials/spread-glass-fr4",{"label":124,"path":125},"Stackups à impédance contrôlée","/pcb/pcb-stack-up",{"sections":127},[128],{"heading":129,"links":130},"Fabrication / stackups",[131,134,137,140,143,146,149,152],{"label":132,"path":133},"Prototypes quickturn","/pcb/quick-turn-pcb",{"label":135,"path":136},"NPI & petites séries (PCB)","/pcb/npi-small-batch-pcb-manufacturing",{"label":138,"path":139},"Production grande série","/pcb/mass-production-pcb-manufacturing",{"label":141,"path":142},"PCB à nombre de couches élevé","/pcb/high-layer-count-pcb",{"label":144,"path":145},"Processus de fabrication PCB","/pcb/pcb-fabrication-process",{"label":147,"path":148},"Fabrication PCB avancée","/pcb/advanced-pcb-manufacturing",{"label":150,"path":151},"Fabrication PCB spéciale","/pcb/special-pcb-manufacturing",{"label":153,"path":154},"Structure laminée multicouche","/pcb/multilayer-pcb-lamination-services",{"heading":156,"links":157},"Spécialités & ressources",[158,161,164,166,169],{"label":159,"path":160},"Finitions de surface PCB (ENIG / ENEPIG / HASL / OSP / Immersion)","/pcb/pcb-surface-finishes",{"label":162,"path":163},"Perçage & vias (Blind / Buried / Via-in-Pad / Backdrill / Half Hole)","/pcb/pcb-drilling",{"label":165,"path":125},"Stackup PCB (Standard / High-Layer / Flex / Rigid-Flex / Aluminum)",{"label":167,"path":168},"Profilage (Milling / V-Scoring / Depaneling)","/pcb/pcb-profiling",{"label":170,"path":171},"Qualité & inspection (AOI + X-Ray / Flying Probe / PCB DFM Check)","/pcb/pcb-quality",[173,178,183,188,193,198,203],{"links":174},[175],{"label":176,"path":177},"Capacité PCB rigide","/capabilities/rigid-pcb",{"links":179},[180],{"label":181,"path":182},"Capacité PCB rigid-flex","/capabilities/rigid-flex-pcb",{"links":184},[185],{"label":186,"path":187},"Capacité PCB flexible","/capabilities/flex-pcb",{"links":189},[190],{"label":191,"path":192},"Capacité PCB HDI","/capabilities/hdi-pcb",{"links":194},[195],{"label":196,"path":197},"Capacité PCB métal","/capabilities/metal-pcb",{"links":199},[200],{"label":201,"path":202},"Capacité PCB céramique","/capabilities/ceramic-pcb",{"links":204},[205],{"label":206,"path":207},"Capacité PCB cuivre épais","/capabilities/heavy-copper-pcb",[209,220,244],{"heading":210,"links":211},"Téléchargements",[212,215,218],{"label":213,"path":214},"Fiches matériaux / notes de procédé","/resources/downloads-materials",{"label":216,"path":217},"Guidelines DFM PCB","/resources/dfm-guidelines",{"label":153,"path":219},"/pcb/multi-layer-laminated-structure",{"heading":221,"links":222},"Outils",[223,226,229,232,235,238,241],{"label":224,"path":225},"Visionneuse Gerber","/tools/gerber-viewer",{"label":227,"path":228},"Visionneuse PCB","/tools/pcb-viewer",{"label":230,"path":231},"Visionneuse BOM","/tools/bom-viewer",{"label":233,"path":234},"Visionneuse 3D","/tools/3d-viewer",{"label":236,"path":237},"Simulateur de circuits","/tools/circuit-simulator",{"label":239,"path":240},"Calculateur d’impédance","/tools/impedance-calculator",{"label":242,"path":243},"Calculateur de largeur de piste","/tools/trace-width-calculator",{"heading":245,"links":246},"FAQ & blog",[247,250],{"label":248,"path":249},"FAQ","/resources/faq",{"label":42,"path":251},"/blog",[253,283,307,340],{"heading":254,"links":255},"Services principaux",[256,259,262,265,268,271,274,277,280],{"label":257,"path":258},"Assemblage PCB turnkey","/pcba/turnkey-assembly",{"label":260,"path":261},"Assemblage PCB NPI & petites séries","/pcba/npi-assembly",{"label":263,"path":264},"Assemblage PCB production de masse","/pcba/mass-production",{"label":266,"path":267},"Assemblage PCB flex & rigid-flex","/pcba/flex-rigid-flex",{"label":269,"path":270},"Assemblage SMT & traversant (THT)","/pcba/smt-tht",{"label":272,"path":273},"Assemblage PCB BGA","/pcba/bga-qfn-fine-pitch",{"label":275,"path":276},"Composants & gestion BOM","/pcba/components-bom",{"label":278,"path":279},"Assemblage box build","/pcba/box-build-assembly",{"label":281,"path":282},"Tests & qualité d’assemblage PCB","/pcba/testing-quality",{"heading":284,"links":285},"Services complémentaires",[286,289,292,295,298,301,304],{"label":287,"path":288},"Tous les points de support","/pcba/support-services",{"label":290,"path":291},"Atelier pochoirs","/pcba/pcb-stencil",{"label":293,"path":294},"Sourcing composants","/pcba/component-sourcing",{"label":296,"path":297},"Programmation IC","/pcba/ic-programming",{"label":299,"path":300},"Vernis de tropicalisation","/pcba/pcb-conformal-coating",{"label":302,"path":303},"Soudure sélective","/pcba/pcb-selective-soldering",{"label":305,"path":306},"Reballing BGA","/pcba/bga-reballing",{"heading":308,"links":309},"Qualité & tests",[310,313,316,319,322,325,328,331,334,337],{"label":311,"path":312},"Inspection qualité","/pcba/quality-system",{"label":314,"path":315},"Inspection premier article (FAI)","/pcba/first-article-inspection",{"label":317,"path":318},"Inspection pâte à braser (SPI)","/pcba/spi-inspection",{"label":320,"path":321},"Inspection optique AOI","/pcba/aoi-inspection",{"label":323,"path":324},"Inspection rayons X / CT","/pcba/xray-inspection",{"label":326,"path":327},"Test en circuit (ICT)","/pcba/ict-test",{"label":329,"path":330},"Test flying probe","/pcba/flying-probe-testing",{"label":332,"path":333},"Test fonctionnel (FCT)","/pcba/fct-test",{"label":335,"path":336},"Inspection finale & emballage","/pcba/final-quality-inspection",{"label":338,"path":339},"Contrôle qualité entrant","/pcba/incoming-quality-control",{"heading":341,"linkClass":342,"links":343},"Applications sectorielles (entrée)","text-nowrap",[344,347,350,353,356,359,362,365,368,371,374],{"label":345,"path":346},"Serveurs / data center","/industries/server-data-center-pcb",{"label":348,"path":349},"Automobile / EV","/industries/automotive-electronics-pcb",{"label":351,"path":352},"Médical","/industries/medical-pcb",{"label":354,"path":355},"Télécom / 5G","/industries/communication-equipment-pcb",{"label":357,"path":358},"Aérospatial & défense","/industries/aerospace-defense-pcb",{"label":360,"path":361},"Drones / UAV","/industries/drone-uav-pcb",{"label":363,"path":364},"Contrôle industriel & automatisation","/industries/industrial-control-pcb",{"label":366,"path":367},"Énergie & nouvelles énergies","/industries/power-energy-pcb",{"label":369,"path":370},"Robotique & automatisation","/industries/robotics-pcb",{"label":372,"path":373},"Sécurité / équipements de sécurité","/industries/security-equipment-pcb",{"label":375,"path":376},"Aperçu de l’industrie PCB →","/pcb-industry-solutions",1791586971481]