{"id":17470,"date":"2025-12-18T16:14:54","date_gmt":"2025-12-18T08:14:54","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=17470"},"modified":"2025-12-18T17:47:07","modified_gmt":"2025-12-18T09:47:07","slug":"pcb-heavy-copper","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/","title":{"rendered":"Reliable PCB Heavy Copper with Custom Design"},"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\/12\/pcb-heavy-copper\/#What_Is_PCB_Heavy_Copper\" >What Is PCB Heavy Copper?<\/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\/12\/pcb-heavy-copper\/#How_Does_PCB_Heavy_Copper_Differ_From_Standard_PCBs\" >How Does PCB Heavy Copper Differ From Standard PCBs?<\/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\/12\/pcb-heavy-copper\/#What_Equipment_Is_Required_in_Heavy_Copper_PCB_Factory_Production\" >What Equipment Is Required in Heavy Copper PCB Factory Production?<\/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\/12\/pcb-heavy-copper\/#How_PCB_Thick_Copper_Improves_Current_Carrying_and_Thermal_Performance\" >How PCB Thick Copper Improves Current Carrying and Thermal Performance?<\/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\/12\/pcb-heavy-copper\/#PCB_Copper_Weight_Explained_and_Why_It_Matters_in_Heavy_Copper_Designs\" >PCB Copper Weight Explained and Why It Matters in Heavy Copper Designs?<\/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\/12\/pcb-heavy-copper\/#Heavy_Copper_PCB_Design_Guidelines_for_High-Current_Applications\" >Heavy Copper PCB Design Guidelines for High-Current Applications<\/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\/12\/pcb-heavy-copper\/#Maximum_PCB_Copper_Thickness_and_Practical_Manufacturing_Limits\" >Maximum PCB Copper Thickness and Practical Manufacturing Limits<\/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\/12\/pcb-heavy-copper\/#Heavy_Copper_PCB_Manufacturing_Process_and_Key_Technical_Challenges\" >Heavy Copper PCB Manufacturing Process and Key Technical Challenges<\/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\/12\/pcb-heavy-copper\/#How_to_Check_PCB_Copper_Thickness\" >How to Check PCB Copper Thickness?<\/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\/12\/pcb-heavy-copper\/#What_Applications_Require_PCB_Heavy_Copper_Circuit_Boards\" >What Applications Require PCB Heavy Copper Circuit Boards?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/#How_Do_Heavy_Copper_PCB_Factories_Control_Etching_and_Plating_Quality\" >How Do Heavy Copper PCB Factories Control Etching and Plating Quality?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/#What_Is_Driving_Growth_in_the_Heavy_Copper_PCB_Market\" >What Is Driving Growth in the Heavy Copper PCB Market?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/#How_to_Choose_a_Reliable_Heavy_Copper_PCB_Manufacturer_for_Custom_Projects\" >How to Choose a Reliable Heavy Copper PCB Manufacturer for Custom Projects?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/#FAQs\" >FAQs<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<p><a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/\" title=\"\">PCB Heavy Copper\u200b<\/a> refers to printed circuit boards manufactured with copper weights significantly higher than the standard 1oz or 2oz, typically starting at 3oz per square foot and extending to 20oz or more, to manage high current and intense thermal loads. This article provides a comprehensive guide to everything from the fundamentals of thick copper <a href=\"https:\/\/www.bestpcbs.com\/\" title=\"\">PCBs<\/a> and their design to selecting a trustworthy manufacturer for your custom projects.<\/p>\n\n\n<div class=\"pcbask\">\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Are you struggling with these common challenges for your custom heavy copper PCB projects?<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Thermal Failure:<\/strong>\u200b Standard <a href=\"https:\/\/www.bestpcbs.com\/\">PCBs<\/a> overheat and fail under high power, causing premature device breakdown.<\/li>\n\n\n\n<li><strong>Current Limitations:<\/strong>\u200b Thin traces cannot carry the required amperage, leading to voltage drops, trace burnout, and fire risks.<\/li>\n\n\n\n<li><strong>Mechanical Weakness:<\/strong>\u200b Inferior boards with poor plating or lamination suffer from pad lifting, via cracking, and broken connections under thermal stress.<\/li>\n\n\n\n<li><strong>Complex Design Hurdles:<\/strong>\u200b Finding accurate heavy copper PCB design\u200b guidelines and reliable PCB copper weight calculator\u200b tools is difficult.<\/li>\n\n\n\n<li><strong>Manufacturer Capability Gap:<\/strong>\u200b Many standard <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/05\/custom-printed-circuit-board-manufacturers-no-moq\/\">circuit board manufacturers<\/a> lack the specialized equipment and expertise for extreme heavy copper PCB\u200b fabrication, resulting in poor yield and long lead times.<\/li>\n<\/ul>\n\n\n<\/div>\n<div class=\"pcbserviec\">\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The solution lies in partnering with a specialist manufacturer who masters the entire process\u2014from custom heavy copper PCB\u200b design support to precision manufacturing. Here\u2019s how we address these core issues:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Superior Thermal Management:<\/strong>\u200b We integrate PCB copper heatsink\u200b structures and use <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/05\/high-temp-pcb-high-tg-pcb-manufacturer-no-moq\/\" title=\"\">high-Tg<\/a> materials to effectively dissipate heat, preventing thermal failure.<\/li>\n\n\n\n<li><strong>High-Current Carrying Capacity:<\/strong>\u200b Our expertise in heavy copper PCB manufacturing\u200b ensures traces and planes with low impedance, safely handling hundreds of amps.<\/li>\n\n\n\n<li><strong>Enhanced Mechanical Integrity:<\/strong>\u200b Advanced plating and controlled lamination processes create robust interconnects and strong adhesion, ensuring reliability in harsh environments.<\/li>\n\n\n\n<li><strong>Expert Design Collaboration:<\/strong>\u200b We provide clear heavy copper PCB design guidelines\u200b and support to navigate challenges like aspect ratios and etching tolerances for your customized heavy copper PCB.<\/li>\n\n\n\n<li><strong>Dedicated Production &amp; Quick Turn:<\/strong>\u200b Our factory is equipped for heavy copper PCB\u200b production, offering professional heavy copper thickness <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/05\/pcb-multilayer-multilayer-pcb-manufacturer-no-moq\/\" title=\"\">multilayer PCB<\/a> services, including quick turn heavy copper PCB\u200b options without compromising quality.<\/li>\n<\/ul>\n\n\n<\/div>\n\n\n<p>At BEST Technology, we are a specialized heavy copper PCB factory\u200b with deep expertise in fabricating reliable, high-performance boards. We combine advanced process with rigorous <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/07\/higher-quality-pcb-manufacturing-quality-control\/\" title=\"\">quality control<\/a> to deliver solutions that meet the most demanding electrical and thermal requirements. For your custom heavy copper PCB circuit board\u200b needs, pls feel free to contact us at <strong>sales@bestpcbs.com<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/12\/pcb-heavy-copper-1.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/12\/pcb-heavy-copper-1.jpg\" alt=\"PCB Heavy Copper\" class=\"wp-image-17473\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_PCB_Heavy_Copper\"><\/span>What Is PCB Heavy Copper?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Heavy copper PCBs are defined by their exceptional conductor thickness. While standard PCBs use 1oz (35\u00b5m) or 2oz (70\u00b5m) copper, heavy copper starts at 3oz (105\u00b5m) and can exceed 20oz (700\u00b5m). This isn&#8217;t just about thicker foil; it involves specialized processes to plate and etch these massive copper weights, often creating unique cross-sectional profiles for traces and planes.<\/p>\n\n\n\n<p><strong>Key Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Copper Weight:<\/strong>\u200b Ranges from &gt;3 oz\/ft\u00b2 to 20+ oz\/ft\u00b2.<\/li>\n\n\n\n<li><strong>Construction:<\/strong>\u200b Can be used on inner layers, outer layers, or both in multilayer boards.<\/li>\n\n\n\n<li><strong>Purpose:<\/strong>\u200b Primarily for high-current paths, power distribution, and thermal dissipation.<\/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\/12\/pcb-heavy-copper-2.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/12\/pcb-heavy-copper-2.jpg\" alt=\"PCB Heavy Copper\" class=\"wp-image-17474\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_PCB_Heavy_Copper_Differ_From_Standard_PCBs\"><\/span>How Does PCB Heavy Copper Differ From Standard PCBs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The difference extends far beyond a simple thickness measurement, impacting design, manufacturing, and performance.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Aspect<\/th><th class=\"has-text-align-center\" data-align=\"center\">Standard PCB (1-2 oz)<\/th><th class=\"has-text-align-center\" data-align=\"center\">Heavy Copper PCB (3-20+ oz)<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Primary Function<\/strong>\u200b<\/td><td class=\"has-text-align-center\" data-align=\"center\">Signal routing, low-power circuits<\/td><td class=\"has-text-align-center\" data-align=\"center\">High-current carrying, thermal management<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Trace Width\/Spacing<\/strong>\u200b<\/td><td class=\"has-text-align-center\" data-align=\"center\">Fine features possible<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wider traces and spacing required<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Thermal Performance<\/strong>\u200b<\/td><td class=\"has-text-align-center\" data-align=\"center\">Moderate, relies on external heatsinks<\/td><td class=\"has-text-align-center\" data-align=\"center\">Excellent, acts as an integral PCB copper heatsink\u200b<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Mechanical Strength<\/strong>\u200b<\/td><td class=\"has-text-align-center\" data-align=\"center\">Standard<\/td><td class=\"has-text-align-center\" data-align=\"center\">Superior (stronger vias, plated holes, and substrate bond)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Manufacturing Process<\/strong>\u200b<\/td><td class=\"has-text-align-center\" data-align=\"center\">Standard etching &amp; plating<\/td><td class=\"has-text-align-center\" data-align=\"center\">Specialized sequential lamination, plating, and differential etching<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Cost<\/strong>\u200b<\/td><td class=\"has-text-align-center\" data-align=\"center\">Lower<\/td><td class=\"has-text-align-center\" data-align=\"center\">Higher due to material use and complex process<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>In summary, heavy copper PCB boards\u200b are engineered solutions for power, not just carriers for signals.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Equipment_Is_Required_in_Heavy_Copper_PCB_Factory_Production\"><\/span>What Equipment Is Required in Heavy Copper PCB Factory Production?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Producing heavy copper PCBs demands specialized machinery beyond a standard PCB line.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High-Capacity Plating Lines:<\/strong>\u200b Essential for electroplating thick copper layers onto hole walls and surfaces to achieve the target PCB copper weight.<\/li>\n\n\n\n<li><strong>Deep Etching Systems:<\/strong>\u200b Equipment capable of differentially etching thick copper with precise control to maintain fine tolerances on sidewalls.<\/li>\n\n\n\n<li><strong>Controlled Lamination Presses:<\/strong>\u200b High-pressure and high-temperature presses that ensure proper resin flow and bonding without voids when laminating thick copper cores.<\/li>\n\n\n\n<li><strong>Laser Direct Imaging (LDI):<\/strong>\u200b For accurately patterning thick copper-clad laminates, where standard photo tools may struggle with light penetration and sidewall reflection.<\/li>\n\n\n\n<li><strong>Advanced Drilling &amp; Routing:<\/strong>\u200b Robust drilling machines for creating clean holes in thick copper stacks and routing tools for separating the heavy, robust panels.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_PCB_Thick_Copper_Improves_Current_Carrying_and_Thermal_Performance\"><\/span>How PCB Thick Copper Improves Current Carrying and Thermal Performance?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The performance benefits are rooted in fundamental physics. <\/p>\n\n\n\n<p>First, current carrying capacity is directly related to cross-sectional area. Doubling copper thickness doubles the area for a given trace width, drastically reducing resistance (R = \u03c1L\/A). This minimizes I\u00b2R losses and voltage drop. <\/p>\n\n\n\n<p>Second, thermal performance improves because copper is an excellent thermal conductor. A PCB thick copper\u200b plane acts as a distributed copper core PCB\u200b heatsink, spreading heat away from hot components (e.g., power MOSFETs, inductors) to the board edges or designated thermal pads.<\/p>\n\n\n\n<p><strong>Formula for Trace Resistance:<\/strong>\u200b <em>R = \u03c1 * (L \/ (T * W))<\/em>where \u03c1=resistivity, L=length, T=thickness, W=width. Increasing <strong>T<\/strong>\u200b directly reduces <strong>R<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PCB_Copper_Weight_Explained_and_Why_It_Matters_in_Heavy_Copper_Designs\"><\/span>PCB Copper Weight Explained and Why It Matters in Heavy Copper Designs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>PCB copper weight\u200b is the mass of copper per unit area, expressed in ounces per square foot (oz\/ft\u00b2). It defines the finished thickness of the copper conductor.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1 oz copper:<\/strong>\u200b Means 1 oz of copper spread over a 1 sq ft area, resulting in a thickness of ~1.37 mils (0.0348 mm). 1 oz copper thickness mm\u200b is approximately 0.035mm.<\/li>\n\n\n\n<li><strong>4 oz copper PCB:<\/strong>\u200b Has a copper thickness of ~5.5 mils (0.14 mm).<\/li>\n\n\n\n<li><strong>20 oz copper PCB:<\/strong>\u200b Represents an extreme thickness of ~27.4 mils (0.7 mm).<\/li>\n<\/ul>\n\n\n\n<p>In heavy copper PCB design, specifying the correct weight is critical. It determines the current rating, thermal mass, and mechanical requirements of the board, directly impacting safety, reliability, and size.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Heavy_Copper_PCB_Design_Guidelines_for_High-Current_Applications\"><\/span>Heavy Copper PCB Design Guidelines for High-Current Applications<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Designing a reliable <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/\" title=\"\">PCB heavy copper <\/a>with custom design\u200b requires adherence to specific rules to avoid manufacturing defects and ensure performance.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Aspect Ratio:<\/strong>\u200b Maintain a sensible drill diameter to board thickness ratio (typically &lt; 10:1 for heavy copper) to ensure proper via plating.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Trace Width\/Spacing:<\/strong>\u200b Use a PCB copper weight calculator\u200b (based on IPC-2152) to determine adequate trace width for your current. Allow for extra spacing due to etching undercut.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Thermal Relief:<\/strong>\u200b Always use thermal relief connections for components soldered to heavy copper planes to facilitate soldering <a href=\"https:\/\/youtu.be\/tvzLjegcNjY?si=D0uu5MKjPKGBuFyM\" title=\"\">heavy copper PCB<\/a>.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Corner Design:<\/strong>\u200b Use 45-degree angles or rounded corners on traces to improve plating uniformity and reduce stress points.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Layer Transition:<\/strong>\u200b For multilayer boards, use multiple vias in parallel when connecting heavy copper layers to handle the current and reduce inductance.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Material Selection:<\/strong>\u200b Specify high-Tg (e.g., &gt;170\u00b0C) and high thermal reliability materials to withstand the stresses of thick copper lamination.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Maximum_PCB_Copper_Thickness_and_Practical_Manufacturing_Limits\"><\/span>Maximum PCB Copper Thickness and Practical Manufacturing Limits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The maximum PCB copper thickness continues to increase as heavy copper manufacturing technology advances. In standard PCB production, commonly used copper weights include <strong>1 oz (35 \u00b5m), 2 oz (70 \u00b5m), 3 oz (105 \u00b5m), 4 oz (140 \u00b5m), and 6 oz (210 \u00b5m)<\/strong>, with <strong>1 oz copper<\/strong> remaining the most widely adopted option for general-purpose electronics.<\/p>\n\n\n\n<p>For applications involving <strong>higher current loads<\/strong>, designers typically select <strong>2 oz copper or thicker<\/strong> to reduce resistive losses and improve thermal dissipation. As current demand increases, thicker copper becomes essential to maintain electrical stability and avoid excessive temperature rise.<\/p>\n\n\n\n<p>In contrast, <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/09\/what-is-high-frequency-laminate-pcb-board\/\" title=\"\">high-frequency<\/a> applications often favor <strong>1 oz copper or thinner<\/strong>. Thinner copper helps minimize conductor loss and signal attenuation, which is critical for maintaining signal integrity at higher frequencies.<\/p>\n\n\n\n<p>As requirements move beyond standard designs, 20 oz copper thickness in heavy copper PCB is already commercially available. Some specialized heavy copper PCB factories are capable of processing copper thicknesses of 30 oz or more by using advanced techniques such as <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/07\/what-is-the-sophisticated-embedded-copper-technology\/\" title=\"\">embedded copper<\/a> PCB structures, copper inlays, or pre-formed copper inserts.<\/p>\n\n\n\n<p>However, the practical manufacturing limits of <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/\" title=\"\">PCB heavy copper<\/a> are not determined by copper weight alone. They are defined by several key process constraints:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Etching capability<\/strong><br>The ability to form controlled trace geometries without excessive undercut becomes increasingly challenging as copper thickness increases.<\/li>\n\n\n\n<li><strong>Plating uniformity<\/strong><br>Ensuring even copper distribution in deep vias, plated features, and across the entire panel is critical for electrical and mechanical reliability.<\/li>\n\n\n\n<li><strong>Lamination challenges<\/strong><br>Very thick copper layers increase the risk of resin starvation, poor adhesion, and void formation during lamination, especially in multilayer structures.<\/li>\n<\/ul>\n\n\n\n<p>In most real-world power and industrial applications, 10 oz to 12 oz copper offers an optimal balance between current-carrying capacity, thermal performance, cost efficiency, and manufacturability. Copper thickness beyond this range is typically reserved for highly specialized designs where extreme electrical or thermal demands justify the added complexity and cost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Heavy_Copper_PCB_Manufacturing_Process_and_Key_Technical_Challenges\"><\/span>Heavy Copper PCB Manufacturing Process and Key Technical Challenges<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The heavy copper PCB manufacturing\u200b process is nuanced.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Core Preparation:<\/strong>\u200b Starting with a thick copper-clad laminate.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Drilling:<\/strong>\u200b Creating holes for vias and PTHs.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electroplating:<\/strong>\u200b The critical step of depositing copper to build up thickness on surfaces and in holes. This often requires multiple plating cycles.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Patterning &amp; Etching:<\/strong>\u200b Using a thick, robust resist to define the circuit pattern and then chemically etching away the unwanted copper. Controlling the etch factor is a major challenge.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Lamination (for multilayer):<\/strong>\u200b Stacking and bonding layers. Managing the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/07\/custom-copper-thickness-on-pcb-pcb-copper-plating-thickness\/\" title=\"\">PCB copper<\/a> density\u200b and resin flow is crucial to avoid delamination.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Surface Finish &amp; Testing:<\/strong>\u200b Applying finishes like ENIG or HASL and conducting rigorous electrical and thermal tests.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Key Challenges:<\/strong>\u200b Avoiding plating voids, controlling sidewall profile during etching, preventing inner layer separation during lamination, and ensuring even copper distribution.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Check_PCB_Copper_Thickness\"><\/span>How to Check PCB Copper Thickness?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Accurate verification of <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/04\/pcb-copper-thickness-pcb-copper-thickness-tolerance\/\" title=\"\">PCB copper thickness<\/a> is critical for <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/07\/higher-quality-pcb-manufacturing-quality-control\/\" title=\"\">quality control<\/a>, electrical performance, and reliability. In practice, manufacturers and laboratories use a combination of destructive and non-destructive measurement methods, depending on accuracy requirements, board structure, and testing conditions.<\/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\">Commonly used PCB copper thickness measurement methods include:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cross-Sectioning (Metallographic Analysis)<\/strong><br>This is the <strong>most accurate and authoritative method<\/strong>. A PCB sample is cut, mounted, polished, and examined under a <strong>metallographic microscope<\/strong> or <strong>scanning electron microscope (SEM)<\/strong> to directly measure copper thickness. It is widely used for process validation and failure analysis.<\/li>\n\n\n\n<li><strong>X-ray Fluorescence (XRF)<\/strong><br>XRF is a <strong>non-destructive technique<\/strong> commonly used to measure surface copper plating thickness. It provides fast and accurate results for outer layers and is widely adopted in production inspection.<\/li>\n\n\n\n<li><strong>Micro-Resistance Measurement<\/strong><br>This method calculates copper thickness by measuring the electrical resistance of a trace with a known length and width. It is useful for estimating <strong>average copper thickness<\/strong> and is often applied during process monitoring.<\/li>\n\n\n\n<li><strong>Eddy Current Measurement<\/strong><br>Based on electromagnetic induction, eddy current testing allows <strong>non-contact and non-destructive<\/strong> copper thickness measurement, particularly effective for surface copper layers.<\/li>\n\n\n\n<li><strong>Weight Difference (Gravimetric Analysis)<\/strong><br>By weighing a panel before and after etching, manufacturers can indirectly calculate the average copper weight. This method is mainly used for <strong>process comparison and verification<\/strong>, rather than precise local measurement.<\/li>\n\n\n\n<li><strong>Chemical Etching and Coulometric Methods<\/strong><br>These techniques determine copper thickness by controlled chemical removal or electrochemical reactions. They are accurate but destructive, and typically used in laboratory environments.<\/li>\n\n\n\n<li><strong>Optical and Image-Based Measurement Systems<\/strong><br>High-resolution optical instruments and image measurement systems can quickly visualize and measure copper thickness, especially when combined with calibrated reference standards.<\/li>\n\n\n\n<li><strong>Ultrasonic and Laser Measurement Techniques<\/strong><br>These methods are applied in specific cases, such as <strong>complex <a href=\"https:\/\/www.bestpcbs.com\/products\/multi-layer-pcb.htm\" title=\"\">multilayer boards<\/a><\/strong>, where non-contact measurement is required. Their effectiveness depends heavily on material structure and calibration.<\/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\">To ensure reliable results, several practical considerations must be followed:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Samples should be <strong>cleaned and pre-treated<\/strong> before measurement to remove contaminants.<\/li>\n\n\n\n<li>Measuring instruments must be <strong>properly calibrated<\/strong> prior to use.<\/li>\n\n\n\n<li>Measurement points should be <strong>carefully selected<\/strong> to ensure representative data.<\/li>\n\n\n\n<li>Environmental factors such as <strong>temperature and humidity<\/strong> should be controlled.<\/li>\n\n\n\n<li>Multiple methods may be combined to <strong>cross-verify results<\/strong>, as each technique has inherent limitations.<\/li>\n<\/ul>\n\n\n\n<p>In summary, no single method is suitable for all <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/04\/pcb-copper-thickness-pcb-copper-thickness-tolerance\/\" title=\"\">PCB copper thickness<\/a> measurements. Cross-sectioning and XRF remain the most widely trusted techniques in the PCB industry, while electrical, electromagnetic, optical, and chemical methods provide valuable complementary data. The appropriate measurement approach should always be selected based on accuracy requirements, board structure, and inspection purpose.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Applications_Require_PCB_Heavy_Copper_Circuit_Boards\"><\/span>What Applications Require PCB Heavy Copper Circuit Boards?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>These boards are essential in high-power, high-stress industries:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Power Converters &amp; Supplies:<\/strong>\u200b UPS systems, industrial SMPS, welding equipment.<\/li>\n\n\n\n<li><strong>Automotive &amp; EV:<\/strong>\u200b Battery management systems (BMS), motor controllers, charging infrastructure.<\/li>\n\n\n\n<li><strong>Renewable Energy:<\/strong>\u200b Solar inverter combiner boxes, wind turbine control systems.<\/li>\n\n\n\n<li><strong>Industrial Equipment:<\/strong>\u200b Motor drives, high-power <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/reliable-quality-byd-automotive-led-aluminum-substrate\/\" title=\"\">LED lighting<\/a>, power distribution backplanes.<\/li>\n\n\n\n<li><strong>Aerospace &amp; Defense:<\/strong>\u200b Radar systems, power distribution units (PDUs), avionics.<\/li>\n\n\n\n<li><strong>High-Voltage Applications:<\/strong>\u200b <a href=\"https:\/\/www.bestpcbs.com\/products\/heavy-copper-pcb.htm\">Heavy copper PCB <\/a>vacuum high voltage\u200b equipment like X-ray generators and particle accelerators.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Do_Heavy_Copper_PCB_Factories_Control_Etching_and_Plating_Quality\"><\/span>How Do Heavy Copper PCB Factories Control Etching and Plating Quality?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Top-tier heavy copper PCB manufacturers\u200b implement stringent controls:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Plating:<\/strong>\u200b Use pulse or periodic reverse plating for better throwing power and uniformity. Monitor bath chemistry, temperature, and current density in real-time.<\/li>\n\n\n\n<li><strong>Etching:<\/strong>\u200b Employ spray etchers with precise chemistry control and multi-stage rinsing. They carefully balance etch rate to achieve the desired <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/06\/china-heavy-copper-pcb-for-prompt-prototyping\/\" title=\"\">heavy copper PCB<\/a> thickness chart\u200b specifications without over-etching fine features.<\/li>\n\n\n\n<li><strong>Process Qualification:<\/strong>\u200b Running test coupons on every panel for cross-sectional analysis to validate plating thickness in holes and on surfaces.<\/li>\n\n\n\n<li><strong>Automated Optical Inspection (AOI):<\/strong>\u200b To catch etching defects like nicks, mouse bites, or insufficient copper removal.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_Driving_Growth_in_the_Heavy_Copper_PCB_Market\"><\/span>What Is Driving Growth in the Heavy Copper PCB Market?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The heavy copper PCB market\u200b is expanding due to several key trends:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electrification:<\/strong>\u200b The boom in <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/08\/better-quality-ev-thick-copper-substrate-thick-copper-pcb\/\" title=\"\">EVs<\/a>, charging stations, and renewable energy demands robust power electronics.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Miniaturization with Higher Power:<\/strong>\u200b Devices are getting smaller but more powerful, increasing power density and thermal management needs.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Reliability Demand:<\/strong>\u200b Industries like automotive and aerospace require longer lifespans and higher reliability under thermal cycling, which heavy copper provides.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Advancements in Technology:<\/strong>\u200b Improved manufacturing processes are making heavy copper PCB boards\u200b more accessible and cost-effective.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Choose_a_Reliable_Heavy_Copper_PCB_Manufacturer_for_Custom_Projects\"><\/span>How to Choose a Reliable Heavy Copper PCB Manufacturer for Custom Projects?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Selecting the right partner is crucial for success. Look for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Proven Expertise &amp; Specialization:<\/strong>\u200b Seek a professional heavy copper thickness <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/05\/pcb-multilayer-multilayer-pcb-manufacturer-no-moq\/\" title=\"\">multilayer PCB manufacturer<\/a>, not just a generalist. Review their portfolio for similar projects.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Technical Support &amp; DFM:<\/strong>\u200b They should offer proactive heavy copper PCB design\u200b review and strong Design for Manufacturability (DFM) feedback.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Advanced Capability Portfolio:<\/strong>\u200b Can they handle your required maximum <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/04\/pcb-copper-thickness-pcb-copper-thickness-tolerance\/\" title=\"\">PCB copper thickness<\/a>, layer count, and incorporate features like copper core PCB\u200b or <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/07\/what-is-the-sophisticated-embedded-copper-technology\/\" title=\"\">embedded copper<\/a>?<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Transparent Communication &amp; Pricing:<\/strong>\u200b They should provide clear heavy copper PCB quotes, a detailed <a href=\"https:\/\/www.bestpcbs.com\/products\/heavy-copper-pcb.htm\" title=\"\">heavy copper PCB<\/a> pricelist\u200b breakdown, and realistic timelines.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Robust Quality Certifications:<\/strong>\u200b Certifications like IATF 16949 (<a href=\"http:\/\/bestpcbs.com\/blog\/2025\/04\/automotive-pcb-manufacturers-automotive-pcb-suppliers\/\" title=\"\">automotive<\/a>), AS9100 (<a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/04\/aerospace-pcb-manufacturers-hdi-pcb-manufacturer\/\" title=\"\">aerospace<\/a>), and ISO 9001 are strong indicators of a quality system.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Geographic Consideration:<\/strong>\u200b While there are many <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/06\/china-heavy-copper-pcb-for-prompt-prototyping\/\" title=\"\">China heavy copper PCB <\/a>manufacturers, also consider heavy copper PCB USA\u200b or heavy copper PCB UK\u200b suppliers for proximity and IP protection if needed.<\/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\/12\/pcb-heavy-copper-3.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2025\/12\/pcb-heavy-copper-3.jpg\" alt=\"PCB Heavy Copper\" class=\"wp-image-17475\"\/><\/a><\/figure>\n\n\n\n<p>To summarize, <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/12\/pcb-heavy-copper\/\" title=\"\">PCB Heavy Copper\u200b <\/a>is an enabling technology for the most demanding power electronics, offering unmatched current capacity, thermal dissipation, and mechanical robustness. This guide has explored its design, manufacturing, applications, and selection criteria to empower your next high-power project.<\/p>\n\n\n\n<p>For a reliable PCB heavy copper with custom design\u200b that meets your exact specifications and performance benchmarks, partner with a specialist. BEST Technology possesses the dedicated equipment, engineering expertise, and rigorous <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/07\/higher-quality-pcb-manufacturing-quality-control\/\" title=\"\">quality controls<\/a> to deliver superior heavy copper PCB circuit boards. We support projects from <a href=\"https:\/\/www.bestpcbs.com\/about\/pcb-prototype.htm\" title=\"\">prototype<\/a> to volume production, including quick turn\u200b needs. A warm welcome to contact our team to discuss your requirements: <strong>sales@bestpcbs.com<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>How Thick Is a Heavy Copper PCB?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>heavy copper PCB<\/strong> typically refers to a printed circuit board with copper thickness <strong>greater than 3 oz (105 \u00b5m)<\/strong> per layer. Common heavy copper ranges include <strong>4 oz, 6 oz, 10 oz<\/strong>, and in specialized applications, <strong>20 oz or more<\/strong>, depending on current, thermal, and mechanical requirements.<\/li>\n<\/ul>\n\n\n\n<p><strong>What Type of Copper Is Used in PCBs?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Most PCBs use <strong>electro-deposited (ED) copper foil<\/strong>, which is well suited for standard and heavy copper applications. For <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/09\/what-is-high-frequency-laminate-pcb-board\/\" title=\"\">high-frequency<\/a> or signal-sensitive designs, <strong>rolled annealed (RA) copper<\/strong> may be used due to its smoother surface and better flexibility, especially in flex and rigid-flex PCBs.<\/li>\n<\/ul>\n\n\n\n<p><strong>How Thick Is 1 oz Copper on a PCB?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1 oz copper<\/strong> on a PCB has a nominal thickness of approximately <strong>35 \u00b5m (0.035 mm)<\/strong>. This is the most commonly used <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/04\/pcb-copper-thickness-pcb-copper-thickness-tolerance\/\" title=\"\">copper thickness<\/a> for standard PCBs and is suitable for general signal and low-current applications.<\/li>\n<\/ul>\n\n\n\n<p><strong>How Thick Is 3 oz of Copper on a PCB?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>3 oz copper<\/strong> corresponds to a thickness of approximately <strong>105 \u00b5m (0.105 mm)<\/strong>. It is often used in designs that require higher current capacity or improved thermal performance compared to standard 1 oz or 2 oz copper.<\/li>\n<\/ul>\n\n\n\n<p><strong>How to Choose PCB Copper Thickness?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PCB copper thickness should be selected based on several key factors, including <strong>current requirements, thermal dissipation needs, signal frequency, board size, and manufacturing capability<\/strong>. Thicker copper is typically chosen for high-current or power electronics, while thinner copper is preferred for <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/09\/what-is-high-frequency-laminate-pcb-board\/\" title=\"\">high-frequency<\/a><a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/09\/how-to-improve-high-speed-circuit-board-signal-integrity\/\" title=\"\"> signal integrity<\/a> and fine-line routing.<\/li>\n<\/ul>\n\n\n\n<p><strong>What Is the Average Thickness of a PCB?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>average thickness of a PCB<\/strong> is usually around <strong>1.6 mm<\/strong>, which is the industry standard for most applications. However, <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/02\/mammoth-75-pcb-thickness-what-is-the-standard-pcb-thickness\/\" title=\"\">PCB thickness<\/a> can vary widely depending on layer count, material selection, and application requirements, ranging from less than 1.0 mm to over 3.2 mm.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>PCB Heavy Copper\u200b refers to printed circuit boards manufactured with copper weights significantly higher than the standard 1oz or 2oz, typically starting at 3oz per square foot and extending to 20oz or more, to manage high current and intense thermal loads. This article provides a comprehensive guide to everything from the fundamentals of thick copper [&hellip;]<\/p>\n","protected":false},"author":33085,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[175,174],"tags":[2092,3114,3113,1919,3111,3112],"class_list":["post-17470","post","type-post","status-publish","format-standard","hentry","category-best-pcb","category-bestpcb","tag-heavy-copper-pcb-design","tag-heavy-copper-pcb-manufacturing","tag-maximum-pcb-copper-thickness","tag-pcb-copper-weight","tag-pcb-heavy-copper","tag-pcb-thick-copper"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/17470","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=17470"}],"version-history":[{"count":3,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/17470\/revisions"}],"predecessor-version":[{"id":17482,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/17470\/revisions\/17482"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=17470"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=17470"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=17470"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}