{"id":22245,"date":"2026-03-24T14:23:19","date_gmt":"2026-03-24T06:23:19","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=22245"},"modified":"2026-03-24T17:09:19","modified_gmt":"2026-03-24T09:09:19","slug":"double-sided-sinkpad-board","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/metal-core-pcb\/double-sided-sinkpad-board\/","title":{"rendered":"Double Sided SinkPAD Board"},"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\/metal-core-pcb\/double-sided-sinkpad-board\/#What_Double_Sided_SinkPAD_Board_is\" >What Double Sided SinkPAD Board is?<\/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\/metal-core-pcb\/double-sided-sinkpad-board\/#Stack_up_of_Double_Sided_SinkPAD_Board\" >Stack up of Double Sided SinkPAD Board<\/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\/metal-core-pcb\/double-sided-sinkpad-board\/#Advantages_of_Utilizing_Double_Sided_SinkPAD_Board\" >Advantages of Utilizing Double Sided SinkPAD Board:<\/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\/metal-core-pcb\/double-sided-sinkpad-board\/#Application_of_Double_Sided_SinkPAD_Board\" >Application of Double Sided SinkPAD Board<\/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\/metal-core-pcb\/double-sided-sinkpad-board\/#2_Layer_SinkaPAD_Board_Capability\" >2 Layer SinkaPAD Board Capability<\/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\/metal-core-pcb\/double-sided-sinkpad-board\/#FAQs_about_Double-Sided_SinkPAD_Boards\" >FAQs about Double-Sided SinkPAD Boards<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Double_Sided_SinkPAD_Board_is\"><\/span>What Double Sided SinkPAD Board is?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The <a href=\"https:\/\/www.bestpcbs.com\/pcb-manufacturer\/double-sided-sinkpad-board\/\">Double sided SinkPAD board <\/a>consists of at least two layers of trace circuit, and there\u2019re at least one circuit layer on both top and bottom side of board, a dielectric (non-conducting) layer, a metal core\/pedestal which normally is copper.<\/p>\n\n\n\n<p>As there\u2019re circuit layer on both sides, so engineer can put more (about 2 times, ideally) components on the same size circuit to realize more function, more complicated design, comparing to&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/products\/1L-sinkpad-board.htm\">1 Layer SinkPAD board<\/a>&nbsp;or&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/products\/2L-sinkpad-board.htm\">2 layers SinkPAD board<\/a>.<\/p>\n\n\n\n<div class=\"wp-block-cover\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\"><\/span><img decoding=\"async\" class=\"wp-block-cover__image-background wp-image-22254\" alt=\"\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/03\/double-sided-sinkpad-PCB.png\" data-object-fit=\"cover\"\/><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<p class=\"has-text-align-center has-large-font-size\"><strong>Double Sided SinkPAD Board<\/strong><\/p>\n<\/div><\/div>\n\n\n\n<p>There\u2019s no PTH (plated through hole) on double sided SinkPAD board, because the limitation of manufacturing process, which different from&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/products\/double-sided-MCPCB.htm\">double sided Metal Core PCB<\/a>&nbsp;which has a lot of PTH, and thermal PAD of LED will be put directly on copper core, also belonging to Direct Thermal Path (DTP) board too, but engineer needs to consider where the heat sink will be if he want more fast heat transferring, as there\u2019re always components on both sides, and that make double sides SinkPAD board designing becoming more difficult &amp; complex comparing to&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/products\/1L-sinkpad-board.htm\">1L SinkPAD board<\/a>, or&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/products\/2L-sinkpad-board.htm\">2L SinkPAD board<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Stack_up_of_Double_Sided_SinkPAD_Board\"><\/span>Stack up of Double Sided SinkPAD Board<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/03\/Double-side-SinkPAD-stack-up-1.jpg\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/03\/Double-side-SinkPAD-stack-up-1.jpg\" alt=\"Double Sided SinkPAD Board\" class=\"wp-image-22251\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advantages_of_Utilizing_Double_Sided_SinkPAD_Board\"><\/span>Advantages of Utilizing Double Sided SinkPAD Board:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Put more components on the both top and bottom, design more complicated circuit board.<\/li>\n\n\n\n<li>It adopts the thermoelectric separation structure, the Lumens depreciation of the LED is minimized, and the life of the lamp is prolonged.<\/li>\n\n\n\n<li>Suitable for matching single high-power lamp, such as Cree XPL, XML, XHP; Osram LED, etc., also COB package LED<\/li>\n\n\n\n<li>High power semiconductors (transistors, thyristors, diodes) as well as resistors.<\/li>\n\n\n\n<li>A variety of Surface Finishing are available according to different demands. (ENIG, OSP, Immersion Tin, ENEPIG, HAL) with excellent reliability of the surface treatment layer.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Application_of_Double_Sided_SinkPAD_Board\"><\/span>Application of Double Sided SinkPAD Board<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High Power LED (up to 200W).<\/li>\n\n\n\n<li>High semiconductors (transistors, thyristors, diodes) as well as resistors.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Layer_SinkaPAD_Board_Capability\"><\/span>2 Layer SinkaPAD Board Capability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Base material: Copper: 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.5mm<\/li>\n\n\n\n<li>Thermal Conductivity: 400 W\/m.K.<\/li>\n\n\n\n<li>Board Thickness: 1.0mm~2.0 mm (0.04&#8243;~0.08&#8243;)<\/li>\n\n\n\n<li>Copper thickness: 0.5 OZ, 1.0 OZ, 2.0 OZ (specially 3-10 OZ)<\/li>\n\n\n\n<li>Outline: Routing, punching, V-Cut<\/li>\n\n\n\n<li>Soldermask: White\/Black\/Blue\/Green\/Red Oil<\/li>\n\n\n\n<li>Legend\/Silkscreen Color: Black\/White\/Yellow<\/li>\n\n\n\n<li>Surface finishing: Immersion Gold, ENEPIG, Immersion Tin, OSP<\/li>\n\n\n\n<li>Max Panel size: 600*500mm(23.62&#8243;*19.68&#8243;)<\/li>\n\n\n\n<li>Packing: Vacuum\/Plastic bag<\/li>\n\n\n\n<li>Samples L\/T: 1.5~2 weeks<\/li>\n\n\n\n<li>MP L\/T: 2-3 weeks<\/li>\n<\/ul>\n\n\n\n<p>Click here to see the&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/manufacturing\/sinkpad-board-manufacturing-process.htm\">manufacturing process of double sided SinkPAD Board<\/a>&nbsp;and other options.<\/p>\n\n\n\n<p>If you want to customize double sided SinkPAD board, please&nbsp;<a href=\"https:\/\/www.bestpcbs.com\/contact\/index.htm\">contact<\/a>&nbsp;EBest Circuit (Best Technology) today send your request for double sides SinkPAD PCB.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_about_Double-Sided_SinkPAD_Boards\"><\/span>FAQs about Double-Sided SinkPAD Boards<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>1. What is a Double-Sided SinkPAD Board and how does it work?<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<p>A <a href=\"https:\/\/www.bestpcbs.com\/pcb-manufacturer\/double-sided-sinkpad-board\/\">Double-Sided SinkPAD Board<\/a> is a specialized Metal Core PCB (MCPCB) that provides a <strong>Direct Thermal Path (DTP)<\/strong> on both sides of the board. Unlike standard MCPCBs that use a dielectric layer to separate the circuit from the metal base, SinkPAD technology removes the dielectric under the component&#8217;s thermal pad. This allows the component (like a high-power LED) to sit directly on the copper or aluminum core, drastically reducing thermal resistance.<\/p>\n\n\n\n<p><strong>2. How does a Double-Sided SinkPAD differ from a standard Double-Sided MCPCB?<\/strong><\/p>\n\n\n\n<p>The primary difference is the <strong>thermal conductivity<\/strong>. In a standard double-sided MCPCB, heat must travel through a thermally conductive dielectric layer (typically 1\u20138 W\/m\u00b7K) to reach the metal core. In a SinkPAD board, the dielectric is bypassed entirely for the thermal pad, allowing for conductivity ratings as high as <strong>400 W\/m\u00b7K<\/strong> (if using a copper core). Additionally, double-sided SinkPADs allow for higher component density by utilizing both the top and bottom layers for active circuitry.<\/p>\n\n\n\n<p><strong>3. Why would I choose a double-sided design over a single-layer SinkPAD?<\/strong><\/p>\n\n\n\n<p>Engineers choose double-sided SinkPADs when they need to maximize functional density in compact spaces. It allows for roughly <strong>twice the component population<\/strong> or more complex circuit routing compared to a 1-layer board. This is ideal for high-power applications where you need to mount LEDs or transistors on one side while placing control circuitry, connectors, or additional power components on the other.<\/p>\n\n\n\n<p><strong>4. Are there limitations to the Plated Through Holes (PTH) in double-sided SinkPADs?<\/strong><\/p>\n\n\n\n<p>Yes. Due to the unique manufacturing process where the metal core is &#8220;sunk&#8221; or embossed to meet the trace layer, standard Plated Through Holes (PTH) are often limited or more complex to implement than in traditional FR4 boards. Connections between sides are typically handled through specialized routing or assembly techniques, so it is crucial to consult with your manufacturer during the design phase to ensure the layout is compatible with the &#8220;thermoelectric separation&#8221; structure.<\/p>\n\n\n\n<p><strong>5. Which base material is better for SinkPAD boards: Aluminum or Copper?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Copper:<\/strong> Best for ultra-high-power applications. It offers superior thermal conductivity (approx. 400 W\/m\u00b7K) and is the most common choice for SinkPAD convexity because it is easier to etch and process for this specific technology.<\/li>\n\n\n\n<li><strong>Aluminum:<\/strong> More cost-effective and lighter. While it has good thermal properties, the chemical process for creating the SinkPAD convexity is more complex, often making it more expensive or difficult to produce than copper-based SinkPADs.<\/li>\n<\/ul>\n\n\n\n<p><strong>6. Can SinkPAD technology be used for components other than LEDs?<\/strong><\/p>\n\n\n\n<p>Absolutely. While most commonly used for high-power LEDs (Cree, Osram, etc.) to prevent lumen depreciation, SinkPAD boards are excellent for any <strong>high-power semiconductor<\/strong> that features an electrically neutral thermal pad. This includes power transistors, thyristors, diodes, and high-wattage resistors used in automotive, aerospace, or industrial power monitoring.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Double Sided SinkPAD Board is? The Double sided SinkPAD board consists of at least two layers of trace circuit, and there\u2019re at least one circuit layer on both top and bottom side of board, a dielectric (non-conducting) layer, a metal core\/pedestal which normally is copper. As there\u2019re circuit layer on both sides, so engineer [&hellip;]<\/p>\n","protected":false},"author":623,"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":[4844],"tags":[4900,1537,1439,4901,142],"class_list":["post-22245","post","type-post","status-publish","format-standard","hentry","category-metal-core-pcb-pcb-manufacturer","tag-double-sided-sinkpad-pcb","tag-ims-pcb","tag-sinkpad-mcpcb","tag-sinkpad-metal-core-pcb","tag-sinkpad-pcb"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/22245","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\/623"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=22245"}],"version-history":[{"count":4,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/22245\/revisions"}],"predecessor-version":[{"id":22258,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/22245\/revisions\/22258"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=22245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=22245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=22245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}