{"id":12100,"date":"2025-08-18T16:26:04","date_gmt":"2025-08-18T08:26:04","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=12100"},"modified":"2025-08-18T16:46:46","modified_gmt":"2025-08-18T08:46:46","slug":"better-quality-ev-thick-copper-substrate-thick-copper-pcb","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/","title":{"rendered":"Better Quality EV Thick Copper Substrate, Thick Copper PCB"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#What_is_EV_Thick_Copper_Substrate\" >What is EV Thick Copper Substrate?<\/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.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#What_are_Features_of_Copper_Substrate_PCB\" >What are Features of Copper Substrate PCB?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#What_is_the_Composition_of_EV_Thick_Copper_Substrate\" >What is the Composition of EV Thick Copper Substrate?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#What_are_the_Types_of_EV_Thick_Copper_Substrate\" >What are the Types of EV Thick Copper Substrate?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#How_Much_Thick_Copper_PCB_in_an_EV\" >How Much Thick Copper PCB in an EV?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#How_Thick_Should_EV_Thick_Copper_Substrate_Be\" >How Thick Should EV Thick Copper Substrate Be?<\/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.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#PCB_Copper_Thickness_Chart\" >PCB Copper Thickness Chart<\/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.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#How_to_Select_EV_Thick_Copper_Substrate_for_the_Project\" >How to Select EV Thick Copper Substrate for the Project?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#What_are_the_Specific_Applications_for_EV_Thick_Copper_Substrate\" >What are the Specific Applications for EV Thick Copper Substrate?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/#Case_about_EV_Thick_Copper_Substrate\" >Case about EV Thick Copper Substrate<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<p>An <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\" title=\"\">EV thick copper substrate<\/a> is really important in the AVs, such as the application of battery management systems, on-board chargers, DC-DC converters, motor controllers, thermal management systems, and others. In this blog, we will discuss valuable information, including the structure, features, thickness standards, selection guide, and key applications of EV thick copper substrates, to ensure better performance in electric vehicles.<\/p>\n\n\n<div class=\"pcbask\">\n\n\n<p><strong>Have you run into these problems when working on the EV PCB projects?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The drilling process problems, such as the inner layer cracks, rough hole walls, and the damaged drilling bit problem?<\/li>\n\n\n\n<li>The thermal management challenges, such as the difference in thermal expansion coefficient, may cause solder joint fatigue and affect the equipment&#8217;s lifespan.<\/li>\n\n\n\n<li>The design and the manufacturing complex?<\/li>\n\n\n\n<li>The shortage of reliability evaluation?<\/li>\n<\/ul>\n\n\n<\/div>\n<div class=\"pcbserviec\">\n\n\n<p><strong>EBest Circuit (Best Technology) provides innovative solutions for tackling the above issues.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Optimize the drilling process and material selection: <\/mark><\/strong>use the special drilling parameter and optimize the drilling bit to reduce the problem of inner layer cracks and the rough hold walls problem. Finally, improve the manufacturing efficiency and the product quality.<\/li>\n\n\n\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Optimize the thermal management and the material selection:<\/mark> <\/strong>employ the high thermal material and the thermal management design to improve the thermal expansion efficiency.<\/li>\n\n\n\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Control process and the quality: <\/mark><\/strong>Make use of laser thickness measurement, dynamic compensation systems, and the full process parameter traceability to ensure the precision of the copper thickness control and the product quality.<\/li>\n\n\n\n<li><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>Make the reliability evaluation and the accelerated inspection.<\/strong><\/mark><\/li>\n<\/ul>\n\n\n<\/div>\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV thick copper substrate<\/a>\u00a0plays a vital role in the electric vehicle sector.<\/mark> If you have any more technical questions or any inquiries, just feel free to contact EBest Circuit (Best Technology) via<strong> sales@bestpcbs.com<\/strong>. EBest Circuit (Best Technology) has specialized in <a href=\"https:\/\/www.bestpcbs.com\/about\/pcb-prototype.htm\" title=\"\">thick copper PCB prototype<\/a>, manufacturing, <a href=\"https:\/\/www.bestpcbs.com\/products\/pcba.htm\" title=\"\">assembly<\/a>, and box build service for over 19 years. Looking forward to hearing from you!<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_1.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_1.jpg\" alt=\"Better Quality EV Thick Copper Substrate, Thick Copper PCB\" class=\"wp-image-12148\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_EV_Thick_Copper_Substrate\"><\/span><strong>What is EV Thick Copper Substrate?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>An<a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\"> EV thick copper substrate<\/a> is a printed circuit base material built with extra layers of copper. Generally, the copper thickness of the common PCB ranges from 1 OZ to 3 OZ, however, in the EV, the copper thickness can be up to 6 OZ to even 20 OZ. This thicker copper layer can manage the high current without being damaged, to reduce the energy loss, and improve the safety margins. In essence, the EV thick copper substrate is the core of the EV power management.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_Features_of_Copper_Substrate_PCB\"><\/span><strong>What are Features of Copper Substrate PCB?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A copper substrate PCB is recognized for its outstanding thermal conductivity. The heat can be conducted quickly, and protect the sensitive chips.&nbsp; It also has remarkable current-carrying ability, which is a core need for EV power modules. Besides, its mechanical strength is higher than the common FR4 as well. The designers commonly select this copper substrate PCB when facing the high reliability requirements. The EV system&#8217;s lifespan will be extended by using this PCB.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_Composition_of_EV_Thick_Copper_Substrate\"><\/span><strong>What is the Composition of EV Thick Copper Substrate?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV thick copper substrate<\/a> is made of three layers, including heavy copper foil, insulation dielectric, and the substrate, such as aluminum or FR4. The copper layer decides the current loading capability. And the insulation dielectric is responsible for the insulation and the thermal dissipation. The substrate provides the stability, however. To some designs, there will increase in the protected coating to improve the corrosion resistant. It is good to know that each layer is vital to the stable performance in the hard EV environment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_the_Types_of_EV_Thick_Copper_Substrate\"><\/span><strong>What are the Types of EV Thick Copper Substrate?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>EV thick copper substrates come in several types:<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">As per structure:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Single-sided thick copper PCB<\/strong>&nbsp;\u2013 for simple, high-current circuits.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Double-sided thick copper PCB<\/strong>&nbsp;\u2013 when routing density increases.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Multilayer thick copper PCB<\/strong>&nbsp;\u2013 designed for advanced EV powertrain and battery management systems.<\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">As per the material compound:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The hybrid copper substrate <\/strong>\u2013 Combining copper and aluminum to boost the heat dissipation performance.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ceramic substrate (DBC\/AMB)<\/strong> \u2013  It is bonded by combining DBC and Al\u2082O\u2083\/AlN ceramic, suitable for high-temperature and high-power applications.<\/li>\n<\/ul>\n\n\n\n<p>Different type meets different project needs. Choose the suitable one as per the design complexity, electrical press grade, and the durability requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Much_Thick_Copper_PCB_in_an_EV\"><\/span><strong>How Much Thick Copper PCB in an EV?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In an electric vehicle, thick copper PCBs are used in several areas. For example, the battery module, automobile charger, and DC-DC converter. The amount varies by vehicle model. High-performance EV in the power control unit and motor drive modules will use the thicker copper PCBs. The lighting system, when dealing with the current surges, will get its benefits as well. Generally, multiple thick copper PCBs are present throughout the EV system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Thick_Should_EV_Thick_Copper_Substrate_Be\"><\/span><strong>How Thick Should EV Thick Copper Substrate Be?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The required <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV thick copper substrate<\/a> thickness depends on the specification designed. The common range is from 4 OZ to 12 OZ. High power applications, such as main inverters, may require 15 OZ or even higher. The engineers will decide according to the current needs, heat output, and the space limit. A reasonable copper thickness can get a balance between efficiency and cost. Since the thinner will get the risk of over heating, but the thicker will increase the costs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_Copper_Thickness_Chart\"><\/span><strong>PCB Copper Thickness Chart<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The following is the simplified PCB copper thickness chart:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Copper Weight (OZ)<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Thickness (\u00b5m)<\/strong><\/td><td><strong>Common Application<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1 OZ<\/td><td class=\"has-text-align-center\" data-align=\"center\">35 \u00b5m<\/td><td>Low-current signal circuits<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">3 OZ<\/td><td class=\"has-text-align-center\" data-align=\"center\">105 \u00b5m<\/td><td>Medium power modules<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">6 OZ<\/td><td class=\"has-text-align-center\" data-align=\"center\">210 \u00b5m<\/td><td>Battery controllers, power relays<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">10 OZ<\/td><td class=\"has-text-align-center\" data-align=\"center\">350 \u00b5m<\/td><td>EV inverters, motor drivers<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">15+ OZ<\/td><td class=\"has-text-align-center\" data-align=\"center\">525 \u00b5m+<\/td><td>Heavy-duty EV systems<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This chart helps engineers select the suitable copper thickness according to the current and the heat dissipation needs. It provides a clear reference during the stage of selecting substrate types.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Select_EV_Thick_Copper_Substrate_for_the_Project\"><\/span><strong>How to Select EV Thick Copper Substrate for the Project?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>When selecting an <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV thick copper substrate<\/a>, several factors come into play:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Required&nbsp;copper thickness&nbsp;based on current load.<\/li>\n\n\n\n<li>Thermal conductivity to manage hot spots.<\/li>\n\n\n\n<li>Mechanical strength for vibration resistance.<\/li>\n\n\n\n<li>Cost efficiency and guarantee the safety in the meantime.<\/li>\n<\/ul>\n\n\n\n<p>It needs to consider the space limit inside the EV part when designing. EBest Circuit (Best Technology) helps customers balance all these concerns. Customers often meet the pain point, such as over-heating boards and the traceability difficulty. Our MES system addresses this by tracking every stage of production. We also control the copper-plated uniformity strictly, so as to reduce the failure risks. Then customers don\u2019t need to bear the extra cost for the rework.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_are_the_Specific_Applications_for_EV_Thick_Copper_Substrate\"><\/span><strong>What are the Specific Applications for EV Thick Copper Substrate?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Thick copper PCB is widely used in EVs, mainly including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">BMS: <\/mark><\/strong>Solving the high current charging and discharging.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Main Inverter:<\/mark><\/strong> Provide controlled power to the driving motor.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Automobile Charger: <\/mark><\/strong>Ensure safety during charging.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Heat Management System: <\/mark><\/strong>Keep the battery within the safe temperature ranges.<\/li>\n<\/ul>\n\n\n\n<p>These applications have extremely high requirements for the substrate strength, durability, and precision. Using <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV thick copper substrate<\/a>, the EV manufacturers can get higher efficiency, more better safety, and more longer lifespan of the components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Case_about_EV_Thick_Copper_Substrate\"><\/span>Case about EV Thick Copper Substrate <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>EBest Circuit (Best Technology) has valuable experience in the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV Thick Copper Substrate<\/a> PCB cases. Here are some parameters of the <a href=\"https:\/\/youtu.be\/LrJANkY0Ohs?si=tRGg6vy5MYZrA4he\">thick copper PCB<\/a> that our customers used in some of their projects. You can take it as a reference. If any help is needed, please feel free to let us know, and we will provide the specific boards and solutions according to your project requirements.<\/p>\n\n\n\n<p><strong>Extra Heavy Copper (14L 5.588mm+\/-10% \u22655 OZ) FR4 PCB Parameters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Layers: 14 layers heavy copper PCB<\/li>\n\n\n\n<li>Inside and outside copper are different, over 5OZ<\/li>\n\n\n\n<li>Board Thickness: 5.588mm+\/-10%<\/li>\n\n\n\n<li>Surface Treatment: ENIG<\/li>\n\n\n\n<li>Solder Mask: Green oi<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_2.png\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_2.png\" alt=\"Extra Heavy Copper (14L 5.588mm+\/-10% \u22655 OZ) FR4 PCB Parameters\" class=\"wp-image-12131\"\/><\/a><\/figure>\n\n\n\n<p><strong>14 Layers heavy copper PCB Parameters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Layers: 14 Layers heavy copper PCB<\/li>\n\n\n\n<li>Materials: Tg170<\/li>\n\n\n\n<li>board thickness: 6.9mm+\/-10%,<\/li>\n\n\n\n<li>4oz copper at each layer<\/li>\n\n\n\n<li>Surface Treatment: Immersion gold (Au 2u&#8221;)<\/li>\n\n\n\n<li>Solder Mask: Green solder mask, white silk screen.<\/li>\n\n\n\n<li>Application: High power supply<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_3.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_3.jpg\" alt=\"14 Layers heavy copper PCB Parameters\" class=\"wp-image-12136\"\/><\/a><\/figure>\n\n\n\n<p><strong>8L Heavy Copper PCB Parameters<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Materials: Tg170<\/li>\n\n\n\n<li>Board Thickness: 2.55mm+\/-10%,<\/li>\n\n\n\n<li>4oz copper at each layer<\/li>\n\n\n\n<li>Surface Treatment: Immersion Gold (Au 2u&#8221;)<\/li>\n\n\n\n<li>Solder Mask: Red solder mask, white silk screen.<\/li>\n\n\n\n<li>Application: High Power Supply<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_4.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/08\/EV_thick_copper_substrate_4.jpg\" alt=\"8L Heavy Copper PCB Parameters\" class=\"wp-image-12140\"\/><\/a><\/figure>\n\n\n\n<p>To sum up, the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\">EV thick copper substrate<\/a> is the core of EV safety, high efficiency, and powerful operation. It is not only a circuit material. EV gains a competitive edge in durability and performance through selecting the suitable copper thickness and the substrate designs. EBest Circuit (Best Technology) has our own <a href=\"https:\/\/www.bestpcbs.com\/products\/index.htm\" title=\"\">PCB<\/a> factory, fully compliant with ISO 9001, <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/05\/pcb-circuit-manufacturer-iso-13485-certified\/\">ISO 13485<\/a>, IATF 16949, AS9100D, UL, REACH, and <a href=\"https:\/\/www.bestpcbs.com\/about\/rohs.htm\">RoHS <\/a>standards. If you need a reliable manufacturer for a viable solution, just feel free to contact us via <strong>sales@bestpcbs.com<\/strong>.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An EV thick copper substrate is really important in the AVs, such as the application of battery management systems, on-board chargers, DC-DC converters, motor controllers, thermal management systems, and others. In this blog, we will discuss valuable information, including the structure, features, thickness standards, selection guide, and key applications of EV thick copper substrates, to [&hellip;]<\/p>\n","protected":false},"author":33085,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[175,174],"tags":[2017],"class_list":["post-12100","post","type-post","status-publish","format-standard","hentry","category-best-pcb","category-bestpcb","tag-ev-thick-copper-substrate"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/12100","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/users\/33085"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=12100"}],"version-history":[{"count":6,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/12100\/revisions"}],"predecessor-version":[{"id":12165,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/12100\/revisions\/12165"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=12100"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=12100"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=12100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}