{"id":33878,"date":"2026-08-19T15:43:39","date_gmt":"2026-08-19T07:43:39","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=33878"},"modified":"2026-08-19T15:43:43","modified_gmt":"2026-08-19T07:43:43","slug":"cob-led-aluminum-pcb","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/08\/cob-led-aluminum-pcb\/","title":{"rendered":"COB LED Aluminum PCB Manufacturing for High-Power LED Modules"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/2026\/08\/cob-led-aluminum-pcb\/#What_Is_a_COB_LED_Aluminum_PCB_and_Why_Is_It_Used_for_High-Power_LEDs\" >What Is a COB LED Aluminum PCB and Why Is It Used for High-Power LEDs?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#How_Does_a_COB_LED_Aluminum_PCB_Improve_Heat_Dissipation\" >How Does a COB LED Aluminum PCB Improve Heat Dissipation?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#Which_Applications_Use_COB_LED_Aluminum_PCBs_and_COB_Light_Engines\" >Which Applications Use COB LED Aluminum PCBs and COB Light Engines?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#How_Should_Thermal_Conductivity_Dielectric_Thickness_and_Copper_Weight_Be_Selected\" >How Should Thermal Conductivity, Dielectric Thickness and Copper Weight Be Selected?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#How_Should_the_COB_LED_Footprint_and_Thermal_Pad_Match_the_Aluminum_PCB\" >How Should the COB LED Footprint and Thermal Pad Match the Aluminum PCB?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#When_Should_You_Choose_an_Aluminum-Core_PCB_Instead_of_a_Copper-Core_PCB_for_COB_LEDs\" >When Should You Choose an Aluminum-Core PCB Instead of a Copper-Core PCB for COB LEDs?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#What_Steps_Are_Used_to_Manufacture_and_Assemble_a_High-Power_COB_LED_Aluminum_PCB\" >What Steps Are Used to Manufacture and Assemble a High-Power COB LED Aluminum PCB?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#What_Steps_Are_Used_to_Inspect_and_Test_a_COB_LED_Aluminum_PCB_Before_Shipment\" >What Steps Are Used to Inspect and Test a COB LED Aluminum PCB Before Shipment?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#What_COB_LED_Aluminum_PCB_Manufacturing_Capabilities_Can_We_Provide\" >What COB LED Aluminum PCB Manufacturing Capabilities Can We Provide?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#Case_Study_High-Power_COB_LED_Aluminum_PCB_From_Prototype_to_Production\" >Case Study: High-Power COB LED Aluminum PCB From Prototype to Production<\/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\/2026\/08\/cob-led-aluminum-pcb\/#What_Specifications_and_Files_Are_Required_for_a_COB_LED_Aluminum_PCB_Quote\" >What Specifications and Files Are Required for a COB LED Aluminum PCB Quote?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#Why_Choose_EBest_Circuit_for_COB_LED_Aluminum_PCB_Manufacturing\" >Why Choose EBest Circuit for COB LED Aluminum PCB Manufacturing?<\/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\/2026\/08\/cob-led-aluminum-pcb\/#FAQs_About_COB_LED_Aluminum_PCBs\" >FAQs About COB LED Aluminum PCBs<\/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\/2026\/08\/cob-led-aluminum-pcb\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<p>A <strong><a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/08\/cob-led-aluminum-pcb\/\" title=\"\">COB LED aluminum PCB<\/a><\/strong> combines electrical routing with an efficient thermal path for high-power LED modules. Its performance depends on the dielectric layer, copper layout, LED interface and metal base working together. EBest Circuit supports metal core PCB projects from PCB design and prototyping to component sourcing, PCB assembly and mass production.<\/p>\n\n\n\n<div class=\"pcbserviec\">\n\n\n\n<p><strong>Are you worried about these COB LED aluminum PCB problems?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The COB LED still runs too hot after changing from FR4 to an aluminum PCB.<\/strong><\/li>\n\n\n\n<li><strong>You are unsure which thermal conductivity, dielectric thickness or copper weight is actually needed.<\/strong><\/li>\n\n\n\n<li><strong>The prototype works, but material or assembly consistency becomes difficult in production.<\/strong><\/li>\n<\/ul>\n\n\n\n<\/div>\n\n\n\n<div class=\"pcbask\">\n\n\n\n<p>As a professional <strong><a href=\"https:\/\/www.bestpcbs.com\/products\/metal-core-pcb.htm\" title=\"\">metal core PCB<\/a><\/strong> manufacturer, EBest Circuit can solve these issues by matching the PCB construction to the LED package, electrical load and thermal requirements. Below are our solutions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Improve the Thermal Path<\/strong><br>Review the dielectric, copper spreading area and metal-base construction to reduce unnecessary thermal resistance.<\/li>\n\n\n\n<li><strong>Select the Right PCB Specifications<\/strong><br>Define thermal conductivity, dielectric thickness, copper weight and aluminum thickness from the actual LED power and current.<\/li>\n\n\n\n<li><strong>Keep Production Consistent<\/strong><br>Confirm the construction during prototyping and maintain the approved materials and assembly requirements in volume production.<\/li>\n<\/ul>\n\n\n\n<p>Developing a <strong>high-power COB LED aluminum PCB<\/strong>? Send your PCB files, LED datasheet and project requirements to <strong><a href=\"mailto:sales@bestpcbs.com\">sales@bestpcbs.com<\/a><\/strong> for a quotation.<\/p>\n\n\n\n<\/div>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB.png\"><img loading=\"lazy\" decoding=\"async\" width=\"765\" height=\"470\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB.png\" alt=\"COB LED Aluminum PCB\" class=\"wp-image-33887\" style=\"aspect-ratio:3\/2;object-fit:cover;width:700px\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB.png 765w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-300x184.png 300w\" sizes=\"auto, (max-width: 765px) 100vw, 765px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_COB_LED_Aluminum_PCB_and_Why_Is_It_Used_for_High-Power_LEDs\"><\/span>What Is a COB LED Aluminum PCB and Why Is It Used for High-Power LEDs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A <strong><a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/08\/cob-led-aluminum-pcb\/\" title=\"\">COB LED aluminum PCB<\/a><\/strong> is a metal-based PCB designed to carry current and move heat away from a COB LED module. It is widely used in high-power lighting because the aluminum base can spread concentrated heat more effectively than a conventional FR4 structure.<\/p>\n\n\n\n<p>A common single-layer construction is:<\/p>\n\n\n\n<p><strong>Copper circuit \u2192 thermal dielectric \u2192 aluminum base<\/strong><\/p>\n\n\n\n<p>In the finished LED module, heat typically travels through:<\/p>\n\n\n\n<p><strong>LED junction \u2192 LED package \u2192 solder or thermal interface \u2192 copper \u2192 dielectric \u2192 aluminum base \u2192 heat sink<\/strong><\/p>\n\n\n\n<p>The copper carries current and spreads heat around the LED area. The dielectric provides electrical isolation while transferring heat into the aluminum base, which distributes it across a larger surface.<\/p>\n\n\n\n<p>The PCB should be designed around the actual COB LED package. Confirm the pad layout, thermal-contact area, optical center, package dimensions and mounting method from the LED datasheet before finalizing the footprint.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_a_COB_LED_Aluminum_PCB_Improve_Heat_Dissipation\"><\/span>How Does a COB LED Aluminum PCB Improve Heat Dissipation?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A <strong>COB LED aluminum PCB<\/strong> spreads heat from the small COB LED area into a much larger metal surface. Heat moves through the copper and dielectric before reaching the aluminum base, so these intermediate layers directly affect thermal performance.<\/p>\n\n\n\n<p>Three parameters matter most:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dielectric Thermal Conductivity<\/strong><br>Higher conductivity improves heat transfer through the insulating layer. It should be evaluated together with dielectric thickness rather than used as a stand-alone specification.<\/li>\n\n\n\n<li><strong>Dielectric Thickness<\/strong><br>A thinner dielectric generally lowers thermal resistance, but it still needs enough dielectric strength and electrical isolation for the application.<\/li>\n\n\n\n<li><strong>Effective Heat-Transfer Area<\/strong><br>Adequate copper and thermal-contact area helps spread heat before it crosses the dielectric. This is especially important when a high-power COB concentrates heat into a small footprint.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Which_Applications_Use_COB_LED_Aluminum_PCBs_and_COB_Light_Engines\"><\/span>Which Applications Use COB LED Aluminum PCBs and COB Light Engines?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>COB LED aluminum boards are mainly used where high light output and concentrated heat occur in the same compact assembly.<\/p>\n\n\n\n<p>Typical applications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Spotlights and Downlights:<\/strong> Compact products with limited space for the PCB and cooling structure.<\/li>\n\n\n\n<li><strong>Track and Architectural Lighting:<\/strong> Modules requiring stable output and accurate LED positioning.<\/li>\n\n\n\n<li><strong>High-Bay and Industrial Lighting:<\/strong> Higher-power products designed for long operating periods.<\/li>\n\n\n\n<li><strong>Streetlights and Floodlights:<\/strong> Outdoor lighting exposed to high power and elevated enclosure temperatures.<\/li>\n\n\n\n<li><strong>Stage Lighting:<\/strong> High-output sources operating at relatively high current.<\/li>\n\n\n\n<li><strong>Machine-Vision Lighting:<\/strong> Applications where stable illumination affects imaging and inspection quality.<\/li>\n\n\n\n<li><strong>Optical Inspection Equipment:<\/strong> Systems requiring precise LED positioning relative to optics.<\/li>\n\n\n\n<li><strong>Medical Illumination:<\/strong> Compact lighting modules requiring stable operation and repeatable assembly.<\/li>\n\n\n\n<li><strong>Projector and Imaging Light Sources:<\/strong> High-brightness systems with concentrated thermal loads.<\/li>\n\n\n\n<li><strong>COB Light Engines:<\/strong> Integrated modules combining the LED, PCB, optics and cooling structure.<\/li>\n<\/ul>\n\n\n\n<p>For a <strong>COB LED module aluminum PCB<\/strong>, total LED power, operating time, ambient temperature and available cooling area matter more than the number of LEDs alone.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Application.png\"><img loading=\"lazy\" decoding=\"async\" width=\"725\" height=\"473\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Application.png\" alt=\"COB LED Aluminum PCB Application\" class=\"wp-image-33913\" style=\"aspect-ratio:3\/2;object-fit:cover;width:700px\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Application.png 725w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Application-300x196.png 300w\" sizes=\"auto, (max-width: 725px) 100vw, 725px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Should_Thermal_Conductivity_Dielectric_Thickness_and_Copper_Weight_Be_Selected\"><\/span>How Should Thermal Conductivity, Dielectric Thickness and Copper Weight Be Selected?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>For a <strong>COB LED aluminum PCB<\/strong>, these values should follow the LED power, operating current, thermal target and electrical-isolation requirement.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Select Thermal Conductivity From Heat Density<\/strong><br>Higher thermal conductivity is useful when the COB LED produces concentrated heat or when PCB area is limited. Moderate-power designs may not require the highest thermal class.<\/li>\n\n\n\n<li><strong>Keep the Dielectric Thin Without Sacrificing Isolation<\/strong><br>A thinner dielectric lowers thermal resistance, but it still needs to meet operating-voltage, dielectric-strength and manufacturing requirements.<\/li>\n\n\n\n<li><strong>Match Copper Weight to Current and Geometry<\/strong><br>Higher current may require heavier copper, but trace width and available copper area are equally important. Heavy copper does not correct an undersized current path.<\/li>\n\n\n\n<li><strong>Provide Enough Copper Around the Heat Source<\/strong><br>Larger copper areas around the COB LED improve lateral heat spreading before heat passes through the dielectric.<\/li>\n\n\n\n<li><strong>Avoid Increasing Specifications Without Finding the Limitation<\/strong><br>A higher W\/m\u00b7K material or heavier copper provides little benefit if another part of the PCB construction limits thermal performance.<\/li>\n\n\n\n<li><strong>Validate the Construction During Prototyping<\/strong><br>Test the selected copper and dielectric construction at the intended LED power before freezing the design for production.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Should_the_COB_LED_Footprint_and_Thermal_Pad_Match_the_Aluminum_PCB\"><\/span>How Should the COB LED Footprint and Thermal Pad Match the Aluminum PCB?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Use the actual COB LED package drawing rather than a generic footprint. Similar-sized COB LEDs can have different electrical pads, thermal regions and mounting structures.<\/p>\n\n\n\n<p>Check the following before release:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electrical Pads:<\/strong> Match pad dimensions, spacing and polarity to the datasheet.<\/li>\n\n\n\n<li><strong>Thermal-Contact Area:<\/strong> Align the PCB thermal region with the package structure.<\/li>\n\n\n\n<li><strong>Optical Center:<\/strong> Position the emitting area correctly relative to the lens or reflector.<\/li>\n\n\n\n<li><strong>Solder Mask Clearance:<\/strong> Keep solderable areas fully exposed.<\/li>\n\n\n\n<li><strong>Package Outline:<\/strong> Leave enough clearance around the LED body.<\/li>\n\n\n\n<li><strong>Mounting Holes:<\/strong> Align the PCB with the LED module and heat sink.<\/li>\n\n\n\n<li><strong>Keep-Out Areas:<\/strong> Keep components and hardware away from optical or mounting areas.<\/li>\n\n\n\n<li><strong>Heat-Sink Interface:<\/strong> Maintain a flat and consistent backside contact area where required.<\/li>\n<\/ul>\n\n\n\n<p>For soldered packages, solder volume also matters. Too much solder can increase stand-off or tilt the LED, while large voids under the thermal region reduce effective heat transfer.<\/p>\n\n\n\n<p>Stencil openings, paste volume and reflow conditions should therefore be matched to the thermal-pad geometry.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_Should_You_Choose_an_Aluminum-Core_PCB_Instead_of_a_Copper-Core_PCB_for_COB_LEDs\"><\/span>When Should You Choose an Aluminum-Core PCB Instead of a Copper-Core PCB for COB LEDs?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Use an <strong>aluminum-core PCB<\/strong> when the required LED temperature can be achieved with the correct dielectric and cooling structure. Move to copper only when the thermal demand exceeds what an optimized aluminum MCPCB can support.<\/p>\n\n\n\n<p>Choose an <strong>aluminum-core PCB<\/strong> when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The Heat Density Is Within the Range of a Conventional MCPCB<\/strong><br>Aluminum works well for many spotlights, downlights, industrial lights, streetlights and other high-power LED modules.<\/li>\n\n\n\n<li><strong>The Dielectric Can Meet the Thermal Target<\/strong><br>If the correct dielectric conductivity and thickness provide enough thermal performance, a copper base adds limited value.<\/li>\n\n\n\n<li><strong>PCB Weight Matters<\/strong><br>Aluminum is lighter than copper and is suitable for larger lighting assemblies.<\/li>\n\n\n\n<li><strong>A Standard MCPCB Structure Is Preferred<\/strong><br>Aluminum-core PCB is widely used for both prototypes and volume LED production.<\/li>\n\n\n\n<li><strong>The External Cooling System Is Adequate<\/strong><br>If heat can move effectively from the PCB into the final cooling structure, aluminum is usually sufficient.<\/li>\n<\/ul>\n\n\n\n<p>Consider a <strong>copper-core PCB<\/strong> when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The COB LED Produces Very High Local Heat Flux<\/strong><br>A highly concentrated thermal load may benefit from stronger lateral heat spreading.<\/li>\n\n\n\n<li><strong>An Optimized Aluminum PCB Still Runs Too Hot<\/strong><br>Copper becomes more relevant after the dielectric and other major thermal limitations have already been addressed.<\/li>\n\n\n\n<li><strong>The Design Requires a Very Low-Resistance or Direct Thermal Path<\/strong><br>Some specialized LED constructions use copper-based structures to shorten the path between the heat source and metal substrate.<\/li>\n\n\n\n<li><strong>Thermal Performance Matters More Than Weight<\/strong><br>Copper provides higher bulk thermal conductivity but also increases PCB weight.<\/li>\n<\/ul>\n\n\n\n<p><strong>Use aluminum when it meets the thermal target. Move to copper only when the optimized aluminum structure is no longer sufficient.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Steps_Are_Used_to_Manufacture_and_Assemble_a_High-Power_COB_LED_Aluminum_PCB\"><\/span>What Steps Are Used to Manufacture and Assemble a High-Power COB LED Aluminum PCB?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A <strong>high-power COB LED aluminum PCB<\/strong> needs a controlled manufacturing process so the approved material, circuit and mechanical structure remain consistent through assembly.<\/p>\n\n\n\n<p><strong>Step 1: Review the Design and Material Requirements<\/strong><\/p>\n\n\n\n<p>Confirm the COB LED footprint, copper weight, dielectric, aluminum thickness, board dimensions, mounting holes, surface finish and required thermal interface.<\/p>\n\n\n\n<p><strong>Step 2: Prepare the Aluminum-Based Laminate<\/strong><\/p>\n\n\n\n<p>Use the approved copper, dielectric and aluminum construction. Material substitutions should be reviewed before production because they can change thermal and mechanical performance.<\/p>\n\n\n\n<p><strong>Step 3: Form and Etch the Copper Circuit<\/strong><\/p>\n\n\n\n<p>Image and etch the LED pads, power paths and supporting circuitry. Trace width and spacing must be compatible with the selected copper thickness.<\/p>\n\n\n\n<p><strong>Step 4: Drill and Profile the PCB<\/strong><\/p>\n\n\n\n<p>Produce mounting holes, slots and the finished outline according to the mechanical drawing. These features may align directly with the heat sink, lens holder or enclosure.<\/p>\n\n\n\n<p><strong>Step 5: Apply Solder Mask and Surface Finish<\/strong><\/p>\n\n\n\n<p>Keep COB LED pads and other solderable areas correctly exposed. The surface finish should match the intended assembly process.<\/p>\n\n\n\n<p><strong>Step 6: Print Solder Paste and Place Components<\/strong><\/p>\n\n\n\n<p>Control paste volume around the LED pads and place the COB LED accurately. Positioning may affect both electrical connection and optical alignment.<\/p>\n\n\n\n<p><strong>Step 7: Complete Reflow and Assembly Inspection<\/strong><\/p>\n\n\n\n<p>Use an appropriate reflow profile and check solder wetting, component orientation, stand-off and visible defects after soldering.<\/p>\n\n\n\n<p><strong>Step 8: Mount the PCB to the Cooling Structure<\/strong><\/p>\n\n\n\n<p>Install the assembled PCB using the specified TIM, screws or clamping arrangement. Avoid uneven contact or mechanical stress on the LED package.<\/p>\n\n\n\n<p><strong>Step 9: Verify Electrical and Thermal Performance<\/strong><\/p>\n\n\n\n<p>Operate the assembled module at the specified load and confirm current, LED function and operating temperature before volume production.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Manufacturing.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"554\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Manufacturing-1024x554.png\" alt=\"COB LED Aluminum PCB Manufacturing\" class=\"wp-image-33916\" style=\"width:717px;height:auto\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Manufacturing-1024x554.png 1024w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Manufacturing-300x162.png 300w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Manufacturing-768x416.png 768w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Manufacturing.png 1090w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Steps_Are_Used_to_Inspect_and_Test_a_COB_LED_Aluminum_PCB_Before_Shipment\"><\/span>What Steps Are Used to Inspect and Test a COB LED Aluminum PCB Before Shipment?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Inspection should cover the characteristics that can affect electrical operation, assembly fit and heat transfer.<\/p>\n\n\n\n<p><strong>Step 1: Verify Material and PCB Construction<\/strong><\/p>\n\n\n\n<p>Check the aluminum base, dielectric, copper thickness and finished PCB thickness against the approved specification.<\/p>\n\n\n\n<p><strong>Step 2: Check Dimensions and Mounting Features<\/strong><\/p>\n\n\n\n<p>Inspect the PCB outline, slots, mounting holes and critical dimensions to confirm fit with the mechanical assembly.<\/p>\n\n\n\n<p><strong>Step 3: Inspect Circuit and Surface Quality<\/strong><\/p>\n\n\n\n<p>Use visual inspection and AOI where applicable to identify opens, shorts, damaged pads, contamination, scratches or solder-mask registration defects.<\/p>\n\n\n\n<p><strong>Step 4: Perform Electrical and Insulation Testing<\/strong><\/p>\n\n\n\n<p>Verify circuit continuity and electrical isolation between the copper circuit and aluminum base.<\/p>\n\n\n\n<p><strong>Step 5: Check PCB Flatness<\/strong><\/p>\n\n\n\n<p>Inspect flatness when the PCB backside forms part of the thermal interface. Excessive warpage can reduce contact with the cooling surface.<\/p>\n\n\n\n<p><strong>Step 6: Inspect COB LED Placement and Soldering<\/strong><\/p>\n\n\n\n<p>Verify polarity, orientation, LED position, solder wetting and the condition of the main thermal-contact area.<\/p>\n\n\n\n<p><strong>Step 7: Perform Functional Testing<\/strong><\/p>\n\n\n\n<p>Operate the assembled module under the specified electrical conditions. Check for abnormal brightness, flicker, current behavior or other functional problems.<\/p>\n\n\n\n<p><strong>Step 8: Complete Thermal Validation<\/strong><\/p>\n\n\n\n<p>Test the module with the intended or representative cooling structure until temperature approaches a stable condition. Use thermocouples, thermal imaging or the LED manufacturer&#8217;s recommended method where appropriate.<\/p>\n\n\n\n<p><strong>Step 9: Confirm Production Consistency<\/strong><\/p>\n\n\n\n<p>Check that production boards use the approved materials, PCB construction and assembly requirements established during prototype validation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Testing.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"573\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Testing-1024x573.png\" alt=\"COB LED Aluminum PCB Testing\" class=\"wp-image-33917\" style=\"width:700px\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Testing-1024x573.png 1024w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Testing-300x168.png 300w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Testing-768x430.png 768w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/08\/COB-LED-Aluminum-PCB-Testing.png 1067w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_COB_LED_Aluminum_PCB_Manufacturing_Capabilities_Can_We_Provide\"><\/span>What COB LED Aluminum PCB Manufacturing Capabilities Can We Provide?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Manufacturing capability determines whether the required <strong>COB LED aluminum PCB<\/strong> construction can be produced consistently from prototype to volume production. The table below summarizes our main MCPCB process capabilities for design and manufacturing reference.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Item<\/th><th>Capabilities<\/th><\/tr><\/thead><tbody><tr><td>Maximum Layer Count<\/td><td>Up to <strong>10 layers<\/strong><\/td><\/tr><tr><td>PCB Thickness<\/td><td><strong>0.3\u20134.0 mm<\/strong><\/td><\/tr><tr><td>Maximum Board Size<\/td><td>Up to <strong>610 \u00d7 1220 mm (24 \u00d7 48 in.)<\/strong><\/td><\/tr><tr><td>Copper Weight<\/td><td><strong>0.5\u201310 oz<\/strong><\/td><\/tr><tr><td>Minimum Trace \/ Space<\/td><td><strong>0.15 \/ 0.15 mm (6 \/ 6 mil)<\/strong><\/td><\/tr><tr><td>Minimum Hole Diameter<\/td><td><strong>0.30 mm (12 mil)<\/strong><\/td><\/tr><tr><td>Minimum Punch Hole Diameter<\/td><td><strong>3.0 mm (0.12 in.)<\/strong><\/td><\/tr><tr><td>Minimum Hole Spacing<\/td><td><strong>0.40 mm (16 mil)<\/strong><\/td><\/tr><tr><td>Maximum Aspect Ratio<\/td><td><strong>12:1<\/strong><\/td><\/tr><tr><td>Minimum Solder Pad Diameter<\/td><td><strong>0.40 mm (16 mil)<\/strong><\/td><\/tr><tr><td>Thermal Conductivity<\/td><td><strong>0.8\u20131.5 W\/m\u00b7K standard; 2.0\u20136.0 W\/m\u00b7K high thermal conductivity<\/strong><\/td><\/tr><tr><td>Warp and Twist<\/td><td><strong>&lt; 0.75%<\/strong><\/td><\/tr><tr><td>Flammability<\/td><td><strong>UL 94V-0<\/strong><\/td><\/tr><tr><td>Thermal Stress<\/td><td><strong>6 \u00d7 10 sec at 288\u00b0C<\/strong><\/td><\/tr><tr><td>Surface Finish<\/td><td><strong>ENIG, Flash Gold, Hard Gold, Selective Gold Plating, HASL, Lead-Free HASL, OSP, Immersion Silver, Immersion Tin<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Case_Study_High-Power_COB_LED_Aluminum_PCB_From_Prototype_to_Production\"><\/span>Case Study: High-Power COB LED Aluminum PCB From Prototype to Production<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Project Background<\/strong><\/p>\n\n\n\n<p>A high-power COB LED module required an aluminum PCB connected to an external heat sink. The board had to provide a reliable thermal path while maintaining the correct LED position, mounting-hole alignment and mechanical fit.<\/p>\n\n\n\n<p><strong>Project Requirements<\/strong><\/p>\n\n\n\n<p>The PCB needed to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Carry the required COB LED current<\/li>\n\n\n\n<li>Transfer heat effectively to the cooling structure<\/li>\n\n\n\n<li>Use an appropriate dielectric, copper weight and aluminum base<\/li>\n\n\n\n<li>Match the LED footprint and thermal-contact area<\/li>\n\n\n\n<li>Maintain PCB flatness and mounting accuracy<\/li>\n\n\n\n<li>Support prototype assembly and later production<\/li>\n<\/ul>\n\n\n\n<p><strong>Our Solution<\/strong><\/p>\n\n\n\n<p>EBest Circuit reviewed the COB LED datasheet, PCB layout and mechanical drawing before prototype fabrication.<\/p>\n\n\n\n<p>The main actions included:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Matching the <strong>COB LED footprint and thermal area<\/strong> to the package<\/li>\n\n\n\n<li>Reviewing <strong>dielectric thickness, copper weight and aluminum construction<\/strong><\/li>\n\n\n\n<li>Providing sufficient copper around the main heat source<\/li>\n\n\n\n<li>Controlling <strong>PCB flatness and mounting-hole alignment<\/strong><\/li>\n\n\n\n<li>Checking soldering, TIM contact and mechanical fit during prototype assembly<\/li>\n\n\n\n<li>Maintaining the approved construction for production<\/li>\n<\/ul>\n\n\n\n<p><strong>Results<\/strong><\/p>\n\n\n\n<p>Prototype validation confirmed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stable COB LED mounting and alignment<\/strong><\/li>\n\n\n\n<li><strong>Consistent PCB-to-heat-sink contact<\/strong><\/li>\n\n\n\n<li><strong>A controlled thermal path<\/strong><\/li>\n\n\n\n<li><strong>Reliable electrical and assembly performance<\/strong><\/li>\n\n\n\n<li><strong>A repeatable construction for volume production<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The approved PCB construction and assembly requirements were then carried forward into production.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Specifications_and_Files_Are_Required_for_a_COB_LED_Aluminum_PCB_Quote\"><\/span>What Specifications and Files Are Required for a COB LED Aluminum PCB Quote?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>For a <strong>COB LED aluminum PCB<\/strong> quote, provide:<\/p>\n\n\n\n<p><strong>Bare PCB:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gerber files<\/li>\n\n\n\n<li>NC drill files<\/li>\n\n\n\n<li>Board dimensions<\/li>\n\n\n\n<li>Mechanical drawing<\/li>\n\n\n\n<li>Finished PCB thickness<\/li>\n\n\n\n<li>Copper weight<\/li>\n\n\n\n<li>Aluminum thickness<\/li>\n\n\n\n<li>Thermal conductivity requirement<\/li>\n\n\n\n<li>Dielectric thickness or material requirement<\/li>\n\n\n\n<li>Surface finish<\/li>\n\n\n\n<li>Solder mask requirement<\/li>\n\n\n\n<li>Quantity<\/li>\n\n\n\n<li>Special tolerance or testing requirements<\/li>\n<\/ul>\n\n\n\n<p><strong>PCB Assembly:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>BOM<\/li>\n\n\n\n<li>Pick-and-place file<\/li>\n\n\n\n<li>Assembly drawing<\/li>\n\n\n\n<li>COB LED part number and datasheet<\/li>\n\n\n\n<li>Polarity information<\/li>\n\n\n\n<li>Functional-test requirements<\/li>\n<\/ul>\n\n\n\n<p><strong>For Thermal Review:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LED operating power and current<\/li>\n\n\n\n<li>Heat-sink drawing<\/li>\n\n\n\n<li>TIM specification<\/li>\n\n\n\n<li>Mounting method<\/li>\n\n\n\n<li>Expected ambient temperature<\/li>\n\n\n\n<li>Maximum allowable operating temperature<\/li>\n<\/ul>\n\n\n\n<p>If some specifications are still open, send the available project files first for review.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Choose_EBest_Circuit_for_COB_LED_Aluminum_PCB_Manufacturing\"><\/span>Why Choose EBest Circuit for COB LED Aluminum PCB Manufacturing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>With more than <strong>20 years of PCB manufacturing experience<\/strong>, EBest Circuit supports COB LED aluminum PCB projects from prototypes through mass production.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>One Supplier From Prototype to Production<\/strong><br>PCB prototyping, Metal Core PCB manufacturing, component sourcing and PCB assembly can be coordinated through EBest Circuit, reducing supplier handoffs.<\/li>\n\n\n\n<li><strong>Metal Core PCB Manufacturing<\/strong><br>Our PCB range includes <strong>Metal Core PCB \/ MCPCB<\/strong>, supporting COB LED modules and other thermal-management applications.<\/li>\n\n\n\n<li><strong>Capacity for Volume Production<\/strong><br>EBest Circuit has approximately <strong>260,000 sq. ft. (28,900 m\u00b2) of monthly PCB manufacturing capability<\/strong>.<\/li>\n\n\n\n<li><strong>Support for Urgent Projects<\/strong><br>Expedited service is available for eligible projects, with qualifying urgent boards capable of shipment within <strong>24 hours<\/strong> after requirements are confirmed.<\/li>\n\n\n\n<li><strong>Quality and Compliance<\/strong><br>EBest Circuit holds <strong>ISO 9001:2015, IATF 16949, ISO 13485:2016, AS9100D, UL, RoHS and REACH<\/strong> credentials.<\/li>\n<\/ul>\n\n\n\n<p>Welcome to contact us if you have any request for COB LED aluminum PCB.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_About_COB_LED_Aluminum_PCBs\"><\/span>FAQs About COB LED Aluminum PCBs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Q1: Does a COB LED need a constant-current driver?<\/strong><br><strong>A1:<\/strong> Usually yes. <strong>A high-power COB LED is normally driven by a constant-current driver<\/strong> so current remains controlled as forward voltage changes. If the module already includes current regulation, follow its datasheet.<\/p>\n\n\n\n<p><strong>Q2: Should multiple COB LEDs be connected in series or parallel?<\/strong><br><strong>A2:<\/strong> <strong>Series connection is generally easier to control because each COB receives the same current.<\/strong> Parallel branches need current balancing because forward-voltage differences can produce unequal current sharing.<\/p>\n\n\n\n<p><strong>Q3: How should the LED driver voltage range match a COB LED?<\/strong><br><strong>A3:<\/strong> <strong>The driver&#8217;s output-voltage range must cover the forward voltage of the COB LED or complete LED string.<\/strong> Add the forward voltages of series-connected COB LEDs before selecting the driver.<\/p>\n\n\n\n<p><strong>Q4: Can a high-power COB LED be dimmed with PWM?<\/strong><br><strong>A4:<\/strong> Yes, when the driver supports it. <strong>Use the dimming method specified by the driver manufacturer<\/strong> rather than switching LED power directly.<\/p>\n\n\n\n<p><strong>Q5: Is it better to run a COB LED below its maximum rated current?<\/strong><br><strong>A5:<\/strong> Often yes. <strong>Lower current reduces thermal load and provides more operating margin.<\/strong> Select the working current from the LED manufacturer&#8217;s current, temperature and light-output data.<\/p>\n\n\n\n<p><strong>Q6: Can a COB LED be connected or disconnected while the driver is powered?<\/strong><br><strong>A6:<\/strong> It is better to avoid it. <strong>Hot-plugging can expose the COB LED to electrical transients.<\/strong> Turn the driver off unless the system is specifically designed for hot swapping.<\/p>\n\n\n\n<p><strong>Q7: Can a reflector or lens touch the COB LED?<\/strong><br><strong>A7:<\/strong> <strong>Optical parts should not press directly against the emitting surface or electrical contacts.<\/strong> Use a suitable holder to maintain alignment and prevent damage.<\/p>\n\n\n\n<p><strong>Q8: Can a failed COB LED be replaced on the MCPCB?<\/strong><br><strong>A8:<\/strong> In many designs, yes. <strong>Replaceability depends on the attachment method and thermal mass of the MCPCB.<\/strong> Rework temperature and heating time need careful control.<\/p>\n\n\n\n<p><strong>Q9: Should a high-power COB LED system include overtemperature protection?<\/strong><br><strong>A9:<\/strong> It is useful when cooling conditions can vary. <strong>Temperature sensing can reduce LED current or shut the system down if temperature exceeds the defined limit.<\/strong><\/p>\n\n\n\n<p><strong>Q10: What happens if one parallel COB LED branch fails open?<\/strong><br><strong>A10:<\/strong> <strong>The remaining branches may carry more current when they share one constant-current source.<\/strong> Parallel designs should consider current balancing or independent current regulation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A reliable <strong>COB LED aluminum PCB<\/strong> depends on the dielectric, copper layout, LED interface and metal substrate being matched to the actual electrical and thermal load.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/www.bestpcbs.com\/\" title=\"\">EBest Circuit <\/a><\/strong>supports metal core PCB manufacturing, prototyping, component sourcing, PCB assembly and mass production. For a <strong>high-power COB LED aluminum PCB<\/strong>, COB LED module or light engine project, send your files and requirements to <strong><a href=\"mailto:sales@bestpcbs.com\">sales@bestpcbs.com<\/a><\/strong> for a quotation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A COB LED aluminum PCB combines electrical routing with an efficient thermal path for high-power LED modules. Its performance depends on the dielectric layer, copper layout, LED interface and metal base working together. EBest Circuit supports metal core PCB projects from PCB design and prototyping to component sourcing, PCB assembly and mass production. Are you [&hellip;]<\/p>\n","protected":false},"author":33247,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[175,174,167],"tags":[7772,7771,7770,7773,7774],"class_list":["post-33878","post","type-post","status-publish","format-standard","hentry","category-best-pcb","category-bestpcb","category-mcpcb","tag-aluminum-pcb-for-cob-led","tag-cob-aluminum-pcb","tag-cob-led-aluminum-pcb","tag-cob-led-mcpcb","tag-cob-led-module-aluminum-pcb"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"COB LED aluminum PCB guide for high-power LED modules, covering thermal design, materials, MCPCB manufacturing, assembly, testing and RFQ.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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