{"id":3498,"date":"2024-10-12T10:19:07","date_gmt":"2024-10-12T02:19:07","guid":{"rendered":"http:\/\/www.bestpcbs.com\/blog\/?p=3498"},"modified":"2024-10-12T10:19:18","modified_gmt":"2024-10-12T02:19:18","slug":"can-i-design-microvias-in-multilayer-mcpcb","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/","title":{"rendered":"Can I design microvias in multilayer MCPCB?"},"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\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/#What_is_a_Microvias\" >What is a Microvias?<\/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\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/#Types_of_Microvias\" >Types of Microvias<\/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\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/#What_is_the_Difference_Between_Vias_and_Microvias\" >What is the Difference Between Vias and Microvias?<\/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\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/#Microvias_vs_Blind_Via\" >Microvias vs. Blind Via<\/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\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/#Can_Microvias_be_Designed_in_Multilayer_MCPCB\" >Can Microvias be Designed in Multilayer MCPCB?<\/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\/2024\/10\/can-i-design-microvias-in-multilayer-mcpcb\/#MCPCB_Material_in_EBest_Circuit_Best_Technology\" >MCPCB Material in EBest Circuit (Best Technology)<\/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_is_a_Microvias\"><\/span>What is a Microvias?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A microvia is a small hole drilled into a PCB that connects different layers. They are essential for high-density interconnections and are commonly used in advanced electronic designs. Typically, microvias equal to or less than 150 microns drilled on the PCB board with a laser. In 2013, the <a href=\"https:\/\/www.bestpcbs.com\/blog\/2021\/06\/what-is-ipc-standard-for-pcb\/\" title=\"\">IPC standard<\/a> changed the definition of microvias to those with an aspect ratio of 1:1. Ratio of aperture to depth (not exceeding 0.25mm). Previously, micropores were less than or equal to 0.15 mm in diameter, so they typically spanned only one layer.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/Microvias.png\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/Microvias.png\" alt=\"Can I design microvias in multilayer MCPCB?\" class=\"wp-image-3499\"\/><\/a><\/figure>\n\n\n\n<p>Because the diameter is very small compared to mechanically drilled through holes (PTH), we define them as microvias, usually connecting only one layer of the board to its adjacent layers. These through holes reduce the possibility of any type of manufacturing defect because they are laser drilled, thus reducing the possibility of any residue remaining after the process. Because of their small size and ability to connect one layer to the next, they can make dense printed circuit boards with more complex designs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Types_of_Microvias\"><\/span>Types of Microvias<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>There are two <a href=\"https:\/\/www.bestpcbs.com\/blog\/2024\/05\/what-are-vias-on-printed-circuit-board-pcb\/\" title=\"\">types of microvias<\/a> in the PCB design \u2013 stacked microvias and staggered microvias.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stacked Microvias<\/li>\n<\/ul>\n\n\n\n<p>Stacked microvias are formed by stacking multiple layers on top of each other to provide a path through which current flows. Create a hole in one layer and drill into another layer below. The top layer is welded or welded to the bottom layer to form an interconnect between the two layers. This allows for fast, efficient routing without compromising performance or reliability.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/Stacked-Microvias.png\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/Stacked-Microvias.png\" alt=\"Can I design microvias in multilayer MCPCB?\" class=\"wp-image-3500\"\/><\/a><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Staggered Microvias<\/li>\n<\/ul>\n\n\n\n<p>The interlaced microvias is aligned with the pad of the same layer, but is offset from its center by half of the pad diameter. The distance from its center to the edge of the board is also half the diameter of the pad. Staggered microvias allow you to place two through holes in a single pad without overlapping them or having to route wires on different layers together in this location. This type of microvias can be used for electrical connections to the surrounding brass pads and traces.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/Staggered-Microvias.png\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/Staggered-Microvias.png\" alt=\"Can I design microvias in multilayer MCPCB?\" class=\"wp-image-3501\"\/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_Difference_Between_Vias_and_Microvias\"><\/span>What is the Difference Between Vias and Microvias?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Vias and microvias serve similar purposes in connecting different layers of a PCB, but they differ significantly in size and application.<\/p>\n\n\n\n<p>1. Size<\/p>\n\n\n\n<p>One of the most significant differences between vias and microvias is their size. Standard vias typically have a diameter greater than 150 micrometers (\u03bcm), while microvias are defined as having a diameter of 150 \u03bcm or less.<\/p>\n\n\n\n<p>2. Design Complexity<\/p>\n\n\n\n<p>As technology advances, the demand for higher circuit densities and more complex designs has grown. Microvias enable designers to create intricate multilayer circuits that were not possible with standard vias.<\/p>\n\n\n\n<p>3. Layer Connection<\/p>\n\n\n\n<p>Standard vias can connect any number of layers in a PCB, typically running from the outer layer through to the inner layers. In contrast, microvias are usually used for connecting one or two layers. Microvias are commonly employed in multilayer PCBs, where they can connect the outer layer to one or more inner layers without passing through the entire board.<\/p>\n\n\n\n<p>4. Aspect Ratio<\/p>\n\n\n\n<p>The aspect ratio, which is the ratio of the depth of a via to its diameter, is another important difference. Standard vias generally have lower aspect ratios, making them easier to fabricate. Microvias, due to their smaller size, often have higher aspect ratios. A typical aspect ratio for microvias ranges from 1:1 to 2:1.<\/p>\n\n\n\n<p>5. Applications<\/p>\n\n\n\n<p>Standard vias are commonly used in traditional PCB designs for applications where space is not as critical. They are suitable for general-purpose circuits, power distribution, and less complex layouts. In contrast, microvias are essential in high-density applications, such as smartphones, tablets, and advanced computing devices, where compact designs are necessary.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Microvias_vs_Blind_Via\"><\/span>Microvias vs. Blind Via<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Blind vias connect the outer layer of the PCB to one or more inner layers without penetrating the entire board. As the name suggests, these through-holes are &#8220;blind holes&#8221; because they are not visible from the other side of the PCB. Blind holes have several advantages, such as saving space on the board, enabling a more compact design, and improving signal integrity by reducing the length of the signal path.<\/p>\n\n\n\n<p>The blind via passes through the surface layer of the PCB, extending through only a portion of the board to connect the surface layer to one or more inner layers. They are a key component in current <a href=\"https:\/\/www.bestpcbs.com\/design-guide\/index.htm\" title=\"\">PCB designs<\/a>, allowing surface components to connect to inner layers while minimizing the number of layers required for wiring. The advantages of using blind vias including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increased density<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduce the number of layers<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved signal performance<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Good for heat dissipation<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improve mechanical strength<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Can_Microvias_be_Designed_in_Multilayer_MCPCB\"><\/span>Can Microvias be Designed in Multilayer MCPCB?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Yes, microvias can indeed be designed in <a href=\"https:\/\/www.bestpcbs.com\/products\/metal-core-pcb.htm\" title=\"\">multilayer MCPCBs<\/a>. In fact, their small size and efficient design make them ideal for these types of boards. Multilayer MCPCBs often require compact interconnections to accommodate various functionalities, and microvias facilitate this need. By enabling multiple layers to connect efficiently, microvias enhance the overall performance of the MCPCB. Additionally, they contribute to improved thermal management, a critical factor in high-power applications. Their integration in multilayer designs is a significant advantage for modern electronics.<\/p>\n\n\n\n<p>The process for using microvias in multilayer metal-based circuit boards includes the following key steps:<\/p>\n\n\n\n<p>1. Inner laser drilling and plating: This is the first step in the production of microvias, precisely drilled by laser technology, and electroplated.<\/p>\n\n\n\n<p>2. Resin filled: The micro-vias after electroplating are filled with resin to enhance the stability of the structure.<\/p>\n\n\n\n<p>3. Resin grinding: Grind the orifice after the jack hole to ensure a smooth surface.<\/p>\n\n\n\n<p>4. Electroplating: Metallize the surface of the orifice resin to achieve electrical interconnection between layers.<\/p>\n\n\n\n<p>5. Inner circuit etching and outer layer lamination: To complete the production of the inner circuit, and the outer layer of laser drilling and graphic plating, and finally realize the production of multi-layer circuit board.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"MCPCB_Material_in_EBest_Circuit_Best_Technology\"><\/span>MCPCB Material in EBest Circuit (Best Technology)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/MCPCB-Material-in-Best-Technology.png\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/MCPCB-Material-in-Best-Technology-1024x697.png\" alt=\"Can I design microvias in multilayer MCPCB?\" class=\"wp-image-3502\"\/><\/a><\/figure>\n\n\n\n<p><strong>MCPCB Prototype Lead Time (Vary Depends on the MCPCB Design)<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/MCPCB-Prototype-Lead-Time-Vary-Depends-on-the-MCPCB-Design.png\"><img decoding=\"async\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2024\/10\/MCPCB-Prototype-Lead-Time-Vary-Depends-on-the-MCPCB-Design-1024x294.png\" alt=\"Can I design microvias in multilayer MCPCB?\" class=\"wp-image-3503\"\/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What is a Microvias? A microvia is a small hole drilled into a PCB that connects different layers. They are essential for high-density interconnections and are commonly used in advanced electronic designs. Typically, microvias equal to or less than 150 microns drilled on the PCB board with a laser. In 2013, the IPC standard changed [&hellip;]<\/p>\n","protected":false},"author":623,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[175,174,37,167,160],"tags":[484,485],"class_list":["post-3498","post","type-post","status-publish","format-standard","hentry","category-best-pcb","category-bestpcb","category-faq","category-mcpcb","category-metal-core-pcb","tag-microvias","tag-multilayer-mcpcb"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/3498","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=3498"}],"version-history":[{"count":1,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/3498\/revisions"}],"predecessor-version":[{"id":3504,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/3498\/revisions\/3504"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=3498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=3498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=3498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}