{"id":21698,"date":"2025-11-12T18:10:21","date_gmt":"2025-11-12T10:10:21","guid":{"rendered":"https:\/\/www.elepcb.com\/?p=21698"},"modified":"2025-11-12T18:10:21","modified_gmt":"2025-11-12T10:10:21","slug":"pcb-back-drilling","status":"publish","type":"post","link":"https:\/\/www.elepcb.com\/it\/blog\/pcb-back-drilling\/","title":{"rendered":"Spiegazione della foratura posteriore dei PCB: Migliorare l'integrit\u00e0 del segnale"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"21698\" class=\"elementor elementor-21698\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-59efb455 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"59efb455\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-31117e29\" data-id=\"31117e29\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-34edcfc0 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"34edcfc0\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;exclude_headings_by_selector&quot;:[],&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__34edcfc0\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><i aria-hidden=\"true\" class=\"fas fa-chevron-down\"><\/i><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__34edcfc0\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><i aria-hidden=\"true\" class=\"fas fa-chevron-up\"><\/i><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__34edcfc0\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<i class=\"elementor-toc__spinner eicon-animation-spin eicon-loading\" aria-hidden=\"true\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-791d4b63 elementor-widget elementor-widget-text-editor\" data-id=\"791d4b63\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"MMJ3dYqfMo488CxSgojc9hJ2nxR\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnzwWQ93rSlNWaDOzmxWNHbg\">\n<div data-page-id=\"SN2QdUsRfo9ptVxuu01cmMU6nCK\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"PjvLdozttokd6JxbqMlck9o0ngg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnD6GQVSvuMfvrKwaFEBoavd\">\n<div data-page-id=\"IvVMdpqGXoW5mAx2lnEcTBVanze\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-WPYWdY2xOo66vWxlZDUchLMWnCc\">\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-Qi4JdNEs7ooXzexWItFcKPLMnwe\">One of the challenges in PCB design and <a href=\"https:\/\/www.elepcb.com\/pcb-manufacturing-process-and-services\/\">manufacturing<\/a> is maintaining <a href=\"https:\/\/www.elepcb.com\/blog\/signal-integrity-in-pcb\/\">signal integrity<\/a>. <strong>Back drilling<\/strong>, also known as controlled-depth drilling, is used to <span style=\"color: #008000;\">remove the conductive via stubs<\/span> from the copper sleeves within PCB through-holes, improving signal integrity.<\/div>\n<div class=\"ace-line ace-line old-record-id-SWJUd1JA2oi3zwxGnqHcfK8Dnfb\">This article introduces the principles and features of back drilling technology, offering design parameters and guidelines to help you improve signal integrity through PCB back drill.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6598f962 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6598f962\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-18217549\" data-id=\"18217549\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b870758 elementor-widget elementor-widget-spacer\" data-id=\"b870758\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2b53cd9b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2b53cd9b\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-71908f17\" data-id=\"71908f17\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1a4fa2ec elementor-widget elementor-widget-heading\" data-id=\"1a4fa2ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>What is Back Drilling in PCB?<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1ed85fa elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1ed85fa\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-921a683\" data-id=\"921a683\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2094965 elementor-widget elementor-widget-text-editor\" data-id=\"2094965\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"PjvLdozttokd6JxbqMlck9o0ngg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn9rWBNE0z7cGNNkCj3Vewue\">\n<div data-page-id=\"IvVMdpqGXoW5mAx2lnEcTBVanze\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-CUrldvH4lo98zkxV4rhcyjfHnWg\">\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-IZV1dOfeRov4Ffx357rcuRf1nIg\">Back drilling refers to the <span style=\"color: #008000;\">secondary drilling of plated-through holes during PCB manufacturing.<\/span> Unwanted stubs are removed after plating <a href=\"https:\/\/www.elepcb.com\/blog\/what-is-through-hole-pcb\/\">through-holes<\/a> are manufactured using a slightly larger drill bit, leaving only the active interconnect area. Unlike traditional through-hole vias, which penetrate the entire PCB board, back drilling selectively removes excess material to transform the through-hole into a &#8220;partial through-hole&#8221;.<\/div>\n<div class=\"ace-line ace-line old-record-id-Eo6adpImwopHWcxn9VocIaLlnTc\">This process mitigates reflection and resonance issues in <a href=\"https:\/\/www.elepcb.com\/blog\/high-frequency-pcb\/\">high-frequency<\/a> signal transmission effectively, improves impedance matching and enhances signal integrity. Therefore, any high-speed <a href=\"https:\/\/www.elepcb.com\/applications\/\"  data-wpil-monitor-id=\"765\">PCB project is an application<\/a> that can benefit from backdrilling, such as data center components and telecom and communication boards.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e2489f4 elementor-widget elementor-widget-image\" data-id=\"e2489f4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"498\" height=\"364\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-in-PCB.png\" class=\"attachment-large size-large wp-image-21700\" alt=\"back drill in PCB\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-in-PCB.png 498w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-in-PCB-300x219.png 300w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-in-PCB-16x12.png 16w\" sizes=\"(max-width: 498px) 100vw, 498px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a33bac1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a33bac1\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9d1303b\" data-id=\"9d1303b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c01d68b elementor-widget elementor-widget-spacer\" data-id=\"c01d68b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c8f480 elementor-widget elementor-widget-heading\" data-id=\"0c8f480\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>Why Need PCB Backdrilling<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-cd51618 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cd51618\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-afa6a42\" data-id=\"afa6a42\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2c09ec5 elementor-widget elementor-widget-text-editor\" data-id=\"2c09ec5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-doxcnWmHEyImfHo7l6ckokhfboW\" data-list=\"bullet\">\n<div><strong>Improving signal integrity: <\/strong>A via on multilayer PCBs is located between the top and bottom layers, extending beyond the last layer, and this creates <strong>a stub of copper<\/strong> that remains unused. Subsequently, when dealing with high frequency, these stubs begin to behave like antennas, receiving the signal sent to them and unintentionally reversing it back to the source, creating distortion, <a href=\"https:\/\/www.elepcb.com\/blog\/crosstalk-in-pcb\/\">crosstalk<\/a>, and other issues with signal integrity.<\/div>\n<\/li>\n<\/ul>\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li class=\"ace-line ace-line old-record-id-doxcn00tnW3i7ATT5ycQ6r6IQye\">For example, a 400G Ethernet backplane design can be achieved without attention to via stubs. However, the PCB does not pass compliance testing for IEEE insertion loss or return loss. It found that it\u2019s because of stubs.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-31b8f66 elementor-widget elementor-widget-image\" data-id=\"31b8f66\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"382\" height=\"290\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/signal-distortion.png\" class=\"attachment-large size-large wp-image-21701\" alt=\"signal distortion\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/signal-distortion.png 382w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/signal-distortion-300x228.png 300w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/signal-distortion-16x12.png 16w\" sizes=\"(max-width: 382px) 100vw, 382px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-ab7df92\" data-id=\"ab7df92\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5f85b05 elementor-widget elementor-widget-text-editor\" data-id=\"5f85b05\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-doxcnEiI8w1qz4VoU6dOOlr03ah\" data-list=\"bullet\">\n<div><strong>Enabling subsequent design upgrades and iterations:<\/strong> A design for 3\u20135 Gbps may find stub vias as survivable, but if this design, 8\u201310 years down the line, wants to take that same architecture and convert it to 25\u201356 Gbps, those stub vias have to go. Starting with an <span style=\"color: #008000;\">entirely clean board<\/span> allows the architecture to compete later for speed increases.<\/div>\n<\/li>\n<\/ul>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4283e7 elementor-widget elementor-widget-image\" data-id=\"b4283e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"438\" height=\"460\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/why-need-pcb-back-drilling.png\" class=\"attachment-large size-large wp-image-21702\" alt=\"why need pcb back drilling\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/why-need-pcb-back-drilling.png 438w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/why-need-pcb-back-drilling-286x300.png 286w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/why-need-pcb-back-drilling-11x12.png 11w\" sizes=\"(max-width: 438px) 100vw, 438px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0274b6 elementor-widget elementor-widget-spacer\" data-id=\"b0274b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a7d6279 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a7d6279\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5e05198\" data-id=\"5e05198\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3ea3dfb elementor-widget elementor-widget-heading\" data-id=\"3ea3dfb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><strong>How is Back Drilling Done?<\/strong><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2582d42 elementor-widget elementor-widget-text-editor\" data-id=\"2582d42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"IvVMdpqGXoW5mAx2lnEcTBVanze\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnTlK6U600eYqHBn2DVDHiBh\">\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-HjjDdeEfGopFf2x76yZc3vLFnWd\">Before diving into the specific process of back drilling, let&#8217;s first understand the <strong>characteristics of circuit boards that undergo backdrilling.<\/strong><\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-SXigdIWJMoPDWXxEhwicDORVn5e\" data-list=\"bullet\">\n<div>Most back-drilled boards are<a href=\"https:\/\/www.elepcb.com\/pcb-products\/ele-rigid-pcb\/\"> rigid PCBs<\/a> and the number of layers typically ranges from 8 to 50.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-GWcudbK7qo362qxkheScFRIYnxe\" data-list=\"bullet\">\n<div>The board thickness is usually <strong>above 2.5 mm<\/strong> and the size tends to be larger.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-IFT6dLtR0onnVmxiRCLcbYStnZk\" data-list=\"bullet\">\n<div>The <strong>minimum drill diameter for the first drilling<\/strong> is generally <strong>\u2265 0.3 mm.<\/strong><\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-LtCzdSIpNohxVtxXYSZcIhZrnKd\" data-list=\"bullet\">\n<div>The back-drilled hole is typically<strong> about 0.2 mm larger<\/strong> than the original drilled hole.<\/div>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2950cab elementor-widget elementor-widget-image\" data-id=\"2950cab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"593\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process-1024x759.png\" class=\"attachment-large size-large wp-image-21706\" alt=\"back drilling in PCB manufacturing process\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process-1024x759.png 1024w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process-300x222.png 300w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process-768x569.png 768w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process-1536x1139.png 1536w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process-16x12.png 16w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drilling-in-PCB-manufacturing-process.png 1594w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">The position of back drilling in PCB manufacturing process<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-159a4dc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"159a4dc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-ea56d92\" data-id=\"ea56d92\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-dd46cdf elementor-widget elementor-widget-text-editor\" data-id=\"dd46cdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"TqxMdcUfko5oeMxtxTdc8mIan5f\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnf7BuZvPWHUC0bspgdU84Xe\">\n<div data-page-id=\"DZAsdetJroFkxcxeVQjcyfnNnDg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-C4sgdmlmLoxQgNx41rtc5DVOnjc\">\n<div data-page-id=\"BcFSdRB1Gol2zkxdhFscxDvAnDb\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-O0HFdYO4ho52jExvAJbc8dDXnFg\">\n<div data-page-id=\"SnzydsWllo0bm3xovKqcokF1nHe\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"R9endOKSfohZDYxDRQXcy4SMnif\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn3dXmgPTeT8LCl4K0ao7yIh\">\n<div data-page-id=\"XMaGd765qowddoxaKhBcUxbEn2g\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn0096ojmZsCCcANe5A1ypVO\">\n<div data-page-id=\"EZC3d1FV5o7LwoxA5rycVKednug\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnjMbtaK2pVA9QVd5GaiW1rd\">\n<div data-page-id=\"NRLEdDiB4om67uxCN22caz9Gn3g\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn4CITzJf2qdAXlu9dCCo1jh\">\n<div data-page-id=\"Mlo1dHQWRoT8Mgxnab7cKZn4nlg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnY013220Fe7mUbPEDdyOvAd\">\n<div data-page-id=\"Sqtwdp27oof9MJxYZSacwYrGncg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnx1sE93GlmXTOHseTdPb84e\">\n<div data-page-id=\"MMJ3dYqfMo488CxSgojc9hJ2nxR\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnKu2WPt5R3EggfFSqq5korc\">\n<div data-page-id=\"SN2QdUsRfo9ptVxuu01cmMU6nCK\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"PjvLdozttokd6JxbqMlck9o0ngg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"IvVMdpqGXoW5mAx2lnEcTBVanze\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<h3 class=\"heading-3 ace-line old-record-id-PX7NdsP4LooFmdxZ1hDcpYyrnXn\">Process<strong> of <\/strong>Back Drilling<\/h3>\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnmSEfH0DK6pm9nWsNRsOzJc\">There are specific steps to manufacture back dilled vias as follows:<\/div>\n<ul>\n<li class=\"ace-line ace-line old-record-id-doxcnrK7oQ68iUHNypMfJIjrQwc\"><a href=\"https:\/\/www.elepcb.com\/blog\/pcb-via-a-complete-guide\/\">Via<\/a>s are drilled fully through the PCB, just like any other assembly, then the copper barrels of the vias are plated.<\/li>\n<li class=\"ace-line ace-line old-record-id-doxcnDxaR69s7QJPWMA4mgdgpzh\">Only vias related to high-speed signals that could create stubs are marked for backdrilling. A <a href=\"https:\/\/www.fsfab.com\/cnc-drilling\/\" rel=\"nofollow noopener\" target=\"_blank\">CNC drill<\/a> returns from the <strong>opposite side<\/strong> and trims the unused copper barrel to the level just above the <span style=\"color: #008000;\">last connected layer<\/span>.<\/li>\n<li class=\"ace-line ace-line old-record-id-doxcnGw9JRqwameyFRBY1xEZYqe\">Finally, the PCB is <strong>washed<\/strong> to remove drilling residues or leftover copper debris inside the back-drilled holes, thus ensuring clean and reliable electrical performance.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a9d773 elementor-widget elementor-widget-text-editor\" data-id=\"7a9d773\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"TqxMdcUfko5oeMxtxTdc8mIan5f\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnf7BuZvPWHUC0bspgdU84Xe\">\n<div data-page-id=\"DZAsdetJroFkxcxeVQjcyfnNnDg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-C4sgdmlmLoxQgNx41rtc5DVOnjc\">\n<div data-page-id=\"BcFSdRB1Gol2zkxdhFscxDvAnDb\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-O0HFdYO4ho52jExvAJbc8dDXnFg\">\n<div data-page-id=\"SnzydsWllo0bm3xovKqcokF1nHe\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"R9endOKSfohZDYxDRQXcy4SMnif\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn3dXmgPTeT8LCl4K0ao7yIh\">\n<div data-page-id=\"XMaGd765qowddoxaKhBcUxbEn2g\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn0096ojmZsCCcANe5A1ypVO\">\n<div data-page-id=\"EZC3d1FV5o7LwoxA5rycVKednug\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnjMbtaK2pVA9QVd5GaiW1rd\">\n<div data-page-id=\"NRLEdDiB4om67uxCN22caz9Gn3g\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcn4CITzJf2qdAXlu9dCCo1jh\">\n<div data-page-id=\"Mlo1dHQWRoT8Mgxnab7cKZn4nlg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnY013220Fe7mUbPEDdyOvAd\">\n<div data-page-id=\"Sqtwdp27oof9MJxYZSacwYrGncg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnx1sE93GlmXTOHseTdPb84e\">\n<div data-page-id=\"MMJ3dYqfMo488CxSgojc9hJ2nxR\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnKu2WPt5R3EggfFSqq5korc\">\n<div data-page-id=\"SN2QdUsRfo9ptVxuu01cmMU6nCK\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"SN2QdUsRfo9ptVxuu01cmMU6nCK\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"PjvLdozttokd6JxbqMlck9o0ngg\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"IvVMdpqGXoW5mAx2lnEcTBVanze\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<h3 class=\"heading-3 ace-line old-record-id-XbuUdgrT9oRtK7xQ5EKccIdfnFe\">Backdrilling Parameters<\/h3>\n<div class=\"ace-line ace-line old-record-id-N8v6ds7HQoijWdx7LTFcS7YInab\"><strong>Back drill hole size:<\/strong> Typically, approximately 10 mil larger than the original via hole (i.e. the initial drilling size).<\/div>\n<div class=\"ace-line ace-line old-record-id-Hp7Ddg9ggokP5BxFYvGc7Vcqnel\"><strong>Back drill hole <\/strong><strong>clearance<\/strong><strong>:<\/strong><\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-B6OAdrBofoWl3rxTEqqcGah3n99\" data-list=\"bullet\">\n<div>There should be 20 mil clearance from the inner layer perimeter circuit patterns. (The IPC standard requires a minimum of 10 mil.)<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-IUA6dexOTorL0qxN4rJczSlgntA\" data-list=\"bullet\">\n<div>The minimum <span style=\"color: #008000;\">spacing between backdirlled vias<\/span> is 10 mil.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-P9ivdbjKOodcpgxIPV3c1DZfndb\" data-list=\"bullet\">\n<div>The minimum <span style=\"color: #008000;\">spacing between a back drill via and an outer layer<\/span> pad is 15 mil (the IPC-6012A standard requires a minimum of 20 mil).<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-Q6A4dOwbxoXaRqxz3Gkc9J1snqd\" data-list=\"bullet\">\n<div>Ensure a dielectric thickness of 6\u20138 mil between plated-through and non-plated-through layers.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-E1iudxfbqosG28xqvwhcHtWRnwd\" data-list=\"bullet\">\n<div>Minimize stub length for optimal signal integrity; however, actual production tolerances (depth tolerance and <a href=\"https:\/\/www.elepcb.com\/blog\/pcb-copper-thickness\/\">board thickness<\/a> tolerance) typically range from 4\u20138 mil.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-IvE4d1VMCo3oQ3x2DlGcfQe7nzd\" data-list=\"bullet\">\n<div>The manufacturers verify the stub depths (\u00b12\u20133 mils tolerances are common) to make sure it is not cut into the signal layers.<\/div>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-43c9b0f elementor-widget elementor-widget-text-editor\" data-id=\"43c9b0f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<h2 class=\"heading-2 ace-line old-record-id-doxcn7i0b5N1ER44j4FNfIPWoR4\">Design Considerations<\/h2>\n<div class=\"ace-line ace-line old-record-id-JDZ6dyAAtoP4Fjx118Bc3WwHnrI\">Several key factors require careful consideration when designing back drilling:<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-KlgXdR9muoG6N3xoICxcBq8mnid\" data-list=\"bullet\">\n<div>The drilling depth can be calculated theoretically:<\/div>\n<\/li>\n<\/ul>\n<div class=\"ace-line ace-line old-record-id-Tc4wdlGmdoCgSyx28lqcpCk7nsj\"><strong>Drilling depth = Distance from the plate surface to the top of the target layer \u2013 <\/strong><strong>Safety<\/strong><strong> margin \u2013 Drill bit length compensation. <\/strong><\/div>\n<div class=\"ace-line ace-line old-record-id-IQJIdBL6TooK9Oxg5X1cdk9ondd\">For example, for a PCB with a total thickness of 1.6 mm, the back drilling depth for holes extending from the surface layer (L1) to layer L5 should be \u201cthe thickness from L1 to L5 plus 0.05 mm compensation\u201d (to avoid damaging layer L5).<\/div>\n<div class=\"ace-line ace-line old-record-id-J3wmduP6Uo3sUsxNMkRcsygJnsh\">This calculation must be extremely precise, taking into account <span style=\"color: #008000;\">all compensation factors, and represents a core control point in production.<\/span> Reducing the back drill depth by 1 mil (i.e., the residual stub depth increases by 1 mil), results in a signal loss of approximately 0.25%.<\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-doxcnOSEjbSAUBXfWxRW0c0Gd1b\" data-list=\"bullet\">\n<div><strong>Limit back drilling to high-speed vias<\/strong> or differential pairs or signal nets over ~3 Gbps. <strong>Power and low-speed control via<\/strong> <span style=\"color: #800000;\"><strong>DO NOT<\/strong> <\/span>require back drilling.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-Ad4wdADHaoPbAExq501cRhypnih\" data-list=\"bullet\">\n<div><strong>Stubs should be 1\/10 of the signal wavelength.<\/strong> For instance, 25 Gbps translates to a signal wavelength of ~24 mm in <a href=\"https:\/\/www.elepcb.com\/blog\/what-is-fr-4-material-in-pcb-fabrication\/\">FR4<\/a>, so anything longer than 2\u20133 mm should be removed.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-doxcnewuHy1OrTwbo3umbkMtQrn\" data-list=\"bullet\">\n<div><strong>The accuracy for depth must be above the last linked layer.<\/strong> Too shallow keeps the stub in place, too deep breaks a connection. Also, the thicker the PCB, the more likely via stubs create problems, and need backdrilling.<\/div>\n<\/li>\n<\/ul>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c6f8393 elementor-widget elementor-widget-spacer\" data-id=\"c6f8393\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-564c19c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"564c19c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2d75aa4\" data-id=\"2d75aa4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f683ff5 elementor-widget elementor-widget-spacer\" data-id=\"f683ff5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a8af3ff elementor-widget elementor-widget-heading\" data-id=\"a8af3ff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>Comparison to Other Via Types<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-006434f elementor-widget elementor-widget-text-editor\" data-id=\"006434f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"IvVMdpqGXoW5mAx2lnEcTBVanze\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-CUy2dfPsxoLKx3xyQnpcLjaonob\">\n<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-UUpNdkURlo2IfrxaJkQc9DicnVd\">Before deciding which via type to use, it\u2019s helpful to compare <strong>back drill vs <a href=\"https:\/\/www.elepcb.com\/blog\/pcb-blind-and-buried-vias\/\">blind via<\/a><\/strong> and other common options. This comparison table shows how each via affects signal integrity, cost, and manufacturing complexity.<\/div>\n<\/div>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9737e93 elementor-widget elementor-widget-image\" data-id=\"9737e93\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"553\" height=\"360\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-vs-blind-via-vs-through-hole-via.png\" class=\"attachment-large size-large wp-image-21703\" alt=\"\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-vs-blind-via-vs-through-hole-via.png 553w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-vs-blind-via-vs-through-hole-via-300x195.png 300w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2025\/11\/back-drill-vs-blind-via-vs-through-hole-via-18x12.png 18w\" sizes=\"(max-width: 553px) 100vw, 553px\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4d65bcb elementor-widget elementor-widget-heading\" data-id=\"4d65bcb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><b>Table: Backdrilled Vias vs Blind Vias vs Buried Vias vs Through-Hole Vias<\/b><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c5ba4ac elementor-widget elementor-widget-text-editor\" data-id=\"c5ba4ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"true\">\n<div>\n<table class=\"ace-table\" data-ace-table-col-widths=\"112;508;116;171\"><colgroup><col width=\"112\" \/><col width=\"508\" \/><col width=\"116\" \/><col width=\"171\" \/><\/colgroup>\n<tbody>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcn3bHErCjK3Cg5dINRChfYId\" style=\"text-align: center;\"><strong>Via Type<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcn3ThN7Xlykf5EKQSKTNWcPc\" style=\"text-align: center;\"><strong>Description &amp; Characteristics<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcn5RDprGXUklFYFopBL2CPjb\" style=\"text-align: center;\"><strong>Cost &amp; Complexity<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnm4xwAzEuhaKsYQ8MboiBGc\" style=\"text-align: center;\"><strong>Best Use Case<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnYBo5SCETuodINs4TcVuxgb\"><strong>Standard <\/strong><strong>Through-Hole<\/strong><strong> Vias<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<ul>\n<li class=\"ace-line ace-line old-record-id-doxcngRzkJC7VAaE8w2U7nnxK1e\">Cheapest and most commonly used.<\/li>\n<li class=\"ace-line ace-line old-record-id-Ho0pde98loUGOcxzs9IcYC5Znfb\">Provide mechanical stability in soldered applications.<\/li>\n<li class=\"ace-line ace-line old-record-id-LAWIdE3aIo229Yx4GP8cOalZnSj\">Best for low-speed or <a href=\"https:\/\/www.elepcb.com\/blog\/low-cost-pcb-assembly\/\">low-cost<\/a> applications where signal integrity is not critical.<\/li>\n<\/ul>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcn5XVz2rZUwKl2OS8BwST8Oe\">Low<\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnEA1hLEJRdAhEBtZLKMHkvg\">Low-speed or low-cost designs<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnigTHAKcJYaT2wJktgqkdbh\"><strong>Blind Vias<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<ul>\n<li class=\"ace-line ace-line old-record-id-doxcne6Kw7J2lOD9cADpape3Uxb\">Connect from top layers to inner layers, but do not pass through the entire PCB.<\/li>\n<li class=\"ace-line ace-line old-record-id-UuswdtZ9PovR2hxPISOcUatdnkh\">No stub creation, since the barrel does not extend to the opposite outer layers. Require more lamination cycles to construct.<\/li>\n<li class=\"ace-line ace-line old-record-id-OW0MdJwQNoaTSOxCfuXcJlwHnzh\">Increase fabrication costs and complexity.<\/li>\n<\/ul>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnEfBTJyvZo5ejMCvaedJiXe\">Medium\u2013High<\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnS2zmCZn3h8QJgst1BxYqsc\">Higher-density designs where stub-free connections are required<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnqVunB37QqdwqLQ3OMxA8Sd\"><strong>Buried Vias<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<ul>\n<li class=\"ace-line ace-line old-record-id-doxcng9eYorSc6rYc1OiyQ1WTic\">Connect only between inner layers and never reach the outer PCB surfaces.<\/li>\n<li class=\"ace-line ace-line old-record-id-doxcng9eYorSc6rYc1OiyQ1WTic\">Do not create stubs, similar to blind vias.<\/li>\n<li class=\"ace-line ace-line old-record-id-RD8fd5GpFo4vWbxp0UHcNOVPn1c\">Require <a href=\"https:\/\/www.elepcb.com\/blog\/pcb-sbu-technology\/\">sequential lamination<\/a> and advanced fabrication techniques.<\/li>\n<li class=\"ace-line ace-line old-record-id-BPpddZ64UoR5DTx8f5McHEznnrd\">More expensive than other types, typically used only in dense or high-performance designs.<\/li>\n<\/ul>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnZ51XEF3m50W8uqduVMFpRc\">High<\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnwqXY4DzvLaUwFGJxIKdfgg\">High-density or high-performance designs<\/div>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnQFbLdAsIAFPlI8EyL7iyxc\"><strong>Backdrilled Vias<\/strong><\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<ul>\n<li class=\"ace-line ace-line old-record-id-doxcnwuA2uO0981xH3K2ukdIBd9\">Begin as standard through-holes, then have a controlled-depth drill to remove unused stubs.<\/li>\n<li class=\"ace-line ace-line old-record-id-B0LKdSx4iocBJXxVtiecZWOunke\">Provide near stub-free performance without requiring blind or buried vias.<\/li>\n<li class=\"ace-line ace-line old-record-id-IVtVdka34oViZLxTFexcdGopnsf\">Do not add extra <a href=\"https:\/\/www.elepcb.com\/blog\/pcb-layers\/\">PCB layers<\/a> or complexity.<\/li>\n<\/ul>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnIDRVZzx0hNWpSQaQvM4byf\">Medium<\/div>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<div class=\"ace-line ace-line old-record-id-doxcnY8QLaipaX965p4t5c8ijjc\">High-speed designs needing low stub impact<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da4e0b1 elementor-widget elementor-widget-text-editor\" data-id=\"da4e0b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-Qz8qdqEDkorTquxztlIcfyqtnfg\">In short, <strong>back drilling in PCB<\/strong> manufacturing provides a <span style=\"color: #008000;\"><strong>cost-effective alternative<\/strong><\/span> to blind and buried vias for high-speed performance.<\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2111e52e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2111e52e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-668b01c0\" data-id=\"668b01c0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d24bc64 elementor-widget elementor-widget-spacer\" data-id=\"d24bc64\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-37342720 elementor-widget elementor-widget-heading\" data-id=\"37342720\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>Future of Backdrilling in PCB<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e7e1977 elementor-widget elementor-widget-text-editor\" data-id=\"e7e1977\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-CfRodbvorozSB9xLeescRYHrnBb\">The backdrilling in PCB significantly improves signal integrity in high-speed PCBs by removing excess stubs from vias, thereby reducing reflections and interference. As <a href=\"https:\/\/www.elepcb.com\/blog\/what-is-5g-uw\/\">5G<\/a>, high-speed computing and<a href=\"https:\/\/www.elepcb.com\/blog\/ai-can-innovate-pcb\/\"> artificial intelligence<\/a> technologies advance rapidly, the demand for back drilling will continue to grow.<\/div>\n<div class=\"ace-line ace-line old-record-id-QCpPdqqOmoElKpxlD7fcZWj4nHe\"><strong>Back drilling technology is advancing towards greater precision and automated, intelligent control.<\/strong><\/div>\n<ul class=\"list-bullet1\">\n<li class=\"ace-line ace-line old-record-id-DHqkdo6waoY60cx5xoDcNPmtnFe\" data-list=\"bullet\">\n<div><strong>Higher precision:<\/strong> The accuracy of back drilling depth control has improved from \u00b15 mil to \u00b12 mil or even finer.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-YbYXdblTio9TaWxCQB7cWyvWn5d\" data-list=\"bullet\">\n<div><strong>Enhanced automation:<\/strong> <a href=\"https:\/\/www.elepcb.com\/blog\/pcb-knowledge\/pcb-design-software\/\">EDA tools<\/a> now offer smarter back drilling rule settings and automated recognition algorithms.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-RrhadRKa0o1irGxHvpDclbcHn5e\" data-list=\"bullet\">\n<div><strong>Technology integration:<\/strong> Back drilling can be combined with techniques such as <a href=\"https:\/\/www.elepcb.com\/blog\/pcb-via-filling\/\">via filling<\/a> and laser drilling.<\/div>\n<\/li>\n<li class=\"ace-line ace-line old-record-id-UNMZdj9k6oHHKFxg7DScQvw2nwb\" data-list=\"bullet\">\n<div><strong>Simulation integration:<\/strong> The effects of back drilling are incorporated directly into signal integrity simulation models.<\/div>\n<\/li>\n<\/ul>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ebd940 elementor-widget elementor-widget-text-editor\" data-id=\"6ebd940\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div data-page-id=\"A5AldwZDtoPcSgxUuyfcA5WRnNf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-doxcnzY1qi4DNTx2SJFExTHHSNh\"><span style=\"color: #000000;\"><strong>\u26a1Wanna enhance your PCB signal integrity with back drilling?<\/strong><\/span><\/div>\n<div class=\"ace-line ace-line old-record-id-Ifi2dJxBmoMkiFxpY4AcAUiVn2b\">At<a href=\"https:\/\/www.elepcb.com\/\"> ELEPCB<\/a>, our experienced engineers provide <span style=\"color: #008000;\"><strong>professional PCB back drilling services<\/strong><\/span> and design support to ensure your high-speed PCBs perform reliably and efficiently.<\/div>\n<div class=\"ace-line ace-line old-record-id-Ifi2dJxBmoMkiFxpY4AcAUiVn2b\"><a href=\"https:\/\/www.elepcb.com\/contact-us\/\"><strong>Contact us today to discuss your project!<\/strong><\/a><\/div>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-22189ec elementor-widget elementor-widget-spacer\" data-id=\"22189ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-688ba04c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"688ba04c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3c2fc7ea\" data-id=\"3c2fc7ea\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-00fccbf elementor-widget elementor-widget-heading\" data-id=\"00fccbf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><b>FAQ<\/b><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f9f4f7b elementor-widget elementor-widget-toggle\" data-id=\"6f9f4f7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"toggle.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-toggle\">\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1871\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1871\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><i class=\"fas fa-caret-right\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><i class=\"elementor-toggle-icon-opened fas fa-caret-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Q1: Do one need to backdrill all high-speed vias?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-1871\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1871\"><div data-page-id=\"K5cQdPyqAoIVz9xiCVzcrjK4n2e\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div data-page-id=\"PzvadCyLxoGC6axfsi0cBB2BnWf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<p>A1: No, only high-speed vias that have the critical signal need to be backdrilled. For instance, power vias or low-speed control signals are unlikely to generate stubs when they are transmitting.<\/p>\n<\/div>\n<\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1872\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1872\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><i class=\"fas fa-caret-right\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><i class=\"elementor-toggle-icon-opened fas fa-caret-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Q2: Is backdrilling just like a blind via?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-1872\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1872\"><div data-page-id=\"K5cQdPyqAoIVz9xiCVzcrjK4n2e\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-BWQ0dJKPTovPhYx6XTfc9xMAngc\">\n<div data-page-id=\"PzvadCyLxoGC6axfsi0cBB2BnWf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-ZGjidQpZuouEMuxnruBcR4Ujndg\">A2: No. Blind vias do not create stubs because they only go to the layer in which you would be connecting them. Backdrilling goes all the way through, and the excess is removed. Backdrilling is less expensive than making a blind via because it&#8217;s just an additional step in multilayer builds.<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1873\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1873\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><i class=\"fas fa-caret-right\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><i class=\"elementor-toggle-icon-opened fas fa-caret-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Q3: How accurate does the backdrill depth need to be?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-1873\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1873\"><div data-page-id=\"K5cQdPyqAoIVz9xiCVzcrjK4n2e\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\" old-record-id-VIvSds1JnokGWWxGglucirLXn4O\">\n<div data-page-id=\"PzvadCyLxoGC6axfsi0cBB2BnWf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-XizidTe9soWkg0xX1N9cjCycnJd\">A3: Accurate enough that it only drills up to just before the last connected layer. If it doesn&#8217;t go deep enough, the stub remains. If it goes too deep, the connection will be missing.<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1874\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1874\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><i class=\"fas fa-caret-right\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><i class=\"elementor-toggle-icon-opened fas fa-caret-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Q4: Is back drilling necessary for all vias that can be drilled?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-1874\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1874\"><div data-page-id=\"K5cQdPyqAoIVz9xiCVzcrjK4n2e\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\" old-record-id-VIvSds1JnokGWWxGglucirLXn4O\">\n<div data-page-id=\"PzvadCyLxoGC6axfsi0cBB2BnWf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-XizidTe9soWkg0xX1N9cjCycnJd\">\n<p>A4: No. Most designers only offer back drilling for their critical high-speed differential pairs and leave other vias alone to avoid a manufacturing upcharge.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-toggle-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1875\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1875\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon elementor-toggle-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-closed\"><i class=\"fas fa-caret-right\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-toggle-icon-opened\"><i class=\"elementor-toggle-icon-opened fas fa-caret-up\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-toggle-title\" tabindex=\"0\">Q5: How do I add back drilling to my PCB design files?<\/a>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t<div id=\"elementor-tab-content-1875\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1875\"><div data-page-id=\"K5cQdPyqAoIVz9xiCVzcrjK4n2e\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\" old-record-id-VIvSds1JnokGWWxGglucirLXn4O\">\n<div data-page-id=\"PzvadCyLxoGC6axfsi0cBB2BnWf\" data-lark-html-role=\"root\" data-docx-has-block-data=\"false\">\n<div class=\"ace-line ace-line old-record-id-XizidTe9soWkg0xX1N9cjCycnJd\">\n<p>A5: Most CAD systems allow you to denote what drilling is needed within drill tables or fabrication notes. You just have to effectively communicate with your <a href=\"https:\/\/www.elepcb.com\/pcb-layout-design-process-and-guidelines\/\" data-wpil-monitor-id=\"764\">PCB designer<\/a> so they know.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-72b68d12 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"72b68d12\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-46a34694\" data-id=\"46a34694\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7f5dff4 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"7f5dff4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-651c3920 elementor-widget elementor-widget-shortcode\" data-id=\"651c3920\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t<div data-elementor-type=\"section\" data-elementor-id=\"2056\" class=\"elementor elementor-2056\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6012901 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6012901\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-afac9b2\" data-id=\"afac9b2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b379375 elementor-widget elementor-widget-image\" data-id=\"b379375\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.elepcb.com\/pcb-products\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-2-768x1024.jpg\" class=\"attachment-large size-large wp-image-15779\" alt=\"pcb and pcba products 1\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-2-768x1024.jpg 768w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-2-225x300.jpg 225w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-2-1152x1536.jpg 1152w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-2-1536x2048.jpg 1536w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-2-scaled.jpg 1920w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-8968fc1\" data-id=\"8968fc1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c0c3b5d elementor-widget elementor-widget-image\" data-id=\"c0c3b5d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.elepcb.com\/contact-us\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/contact-us-1024x683.jpg\" class=\"attachment-large size-large wp-image-15819\" alt=\"contact us\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/contact-us-1024x683.jpg 1024w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/contact-us-300x200.jpg 300w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/contact-us-768x512.jpg 768w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/contact-us-1536x1024.jpg 1536w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/contact-us-2048x1365.jpg 2048w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-25 elementor-top-column elementor-element elementor-element-a17958a\" data-id=\"a17958a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4326577 elementor-widget elementor-widget-image\" data-id=\"4326577\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.elepcb.com\/pcb-products\/\">\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-1-768x1024.jpg\" class=\"attachment-large size-large wp-image-15778\" alt=\"pcb and pcba products 2\" srcset=\"https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-1-768x1024.jpg 768w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-1-225x300.jpg 225w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-1-1152x1536.jpg 1152w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-1-1536x2048.jpg 1536w, https:\/\/www.elepcb.com\/wp-content\/uploads\/2023\/03\/white-bg-1-scaled.jpg 1921w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3dd32bd7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3dd32bd7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-30e73de5\" data-id=\"30e73de5\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-6e6f562b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6e6f562b\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-1aae434c\" data-id=\"1aae434c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-7de62f23\" data-id=\"7de62f23\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-225d5b79 elementor-widget elementor-widget-text-editor\" data-id=\"225d5b79\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"font-family: Oswald, sans-serif; margin: 0px; padding: 0px 0px 10px; line-height: 1.125em; font-size: 32px; text-transform: uppercase; text-align: center; color: #0a1f34;\">CONTACT US<\/p><div class=\"textwidget\"><div id=\"wpcf7-f5-p60-o1\" class=\"wpcf7\" dir=\"ltr\" lang=\"en-US\" role=\"form\"><div class=\"screen-reader-response\" style=\"position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0px; overflow: hidden; clip: rect(0px, 0px, 0px, 0px); border: 0px;\"><p style=\"font-size: 15px; line-height: 1.58em; margin-right: auto; margin-bottom: 0px; margin-left: auto; padding: 25px 0px 15px; text-align: center; max-width: 846px;\" role=\"status\" aria-live=\"polite\" aria-atomic=\"true\">\u00a0<\/p><\/div><form id=\"cf7-form-5\" class=\"wpcf7-form init cf7mls-no-scroll cf7mls-no-moving-animation\" style=\"position: relative; overflow: hidden;\" action=\"https:\/\/www.mclpcb.com\/capabilities\/#wpcf7-f5-p60-o1\" method=\"post\" novalidate=\"novalidate\" data-status=\"init\" data-fx-id=\"1587946425258918\"><div class=\"contact-inner\" style=\"max-width: 846px; margin: 0px auto;\"><p style=\"font-size: 15px; line-height: 1.58em; margin-right: auto; margin-bottom: 0px; margin-left: auto; padding: 25px 0px 15px; text-align: center; max-width: 846px;\">We provide technical expertise form prototype through production, increasing speed to market by 20%.<\/p><p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Contact us below to start discussing your project with our Technical Experts today.<\/p><p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Whether you already have Gerber Files, submit a\u00a0Quick Quote\u00a0for free estimate.<\/p><\/div><\/form><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5782c747 elementor-button-align-center elementor-widget elementor-widget-form\" data-id=\"5782c747\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"New Form\" aria-label=\"New Form\">\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"2056\"\/>\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"5782c747\"\/>\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"An Ultimate Guide to PCB Inspection Methods-ELE PCB\" \/>\n\n\t\t\t\t\t\t\t<input type=\"hidden\" name=\"queried_id\" value=\"4187\"\/>\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-name 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elementor-field-group-field_373bda7 elementor-col-50\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_373bda7\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tPhone Number\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<input size=\"1\" type=\"tel\" name=\"form_fields[field_373bda7]\" id=\"form-field-field_373bda7\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" pattern=\"[0-9()#&amp;+*-=.]+\" title=\"Csak a sz\u00e1mok \u00e9s telefonkarakterek (#, -, * stb.) fogadhat\u00f3k el.\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-checkbox elementor-field-group elementor-column elementor-field-group-field_c168eb1 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_c168eb1\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tI am interested in (select all that apply)\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<div class=\"elementor-field-subgroup  elementor-subgroup-inline\"><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Rigid PCBs\" id=\"form-field-field_c168eb1-0\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-0\">Rigid PCBs<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Flexible Printed Circuit Boards\" id=\"form-field-field_c168eb1-1\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-1\">Flexible Printed Circuit Boards<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Flexible Aluminum PCBs\" id=\"form-field-field_c168eb1-2\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-2\">Flexible Aluminum PCBs<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Flexible PCB Microcircuits\" id=\"form-field-field_c168eb1-3\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-3\">Flexible PCB Microcircuits<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Ultra-Thin Flexible PCBs\" id=\"form-field-field_c168eb1-4\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-4\">Ultra-Thin Flexible PCBs<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Rigid-Flex\" id=\"form-field-field_c168eb1-5\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-5\">Rigid-Flex<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Ceramic Printed Circuit Boards\" id=\"form-field-field_c168eb1-6\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-6\">Ceramic Printed Circuit Boards<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Aluminum Printed Circuit Boards\" id=\"form-field-field_c168eb1-7\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-7\">Aluminum Printed Circuit Boards<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Copper Core\" id=\"form-field-field_c168eb1-8\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-8\">Copper Core<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"IC Substrates &amp; Interposer\" id=\"form-field-field_c168eb1-9\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-9\">IC Substrates & Interposer<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"High TG PCBs\" id=\"form-field-field_c168eb1-10\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-10\">High TG PCBs<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Heavy Copper\" id=\"form-field-field_c168eb1-11\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-11\">Heavy Copper<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"PCB Assembly\" id=\"form-field-field_c168eb1-12\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-12\">PCB Assembly<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Components Sourcing\" id=\"form-field-field_c168eb1-13\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-13\">Components Sourcing<\/label><\/span><span class=\"elementor-field-option\"><input type=\"checkbox\" value=\"Other\" id=\"form-field-field_c168eb1-14\" name=\"form_fields[field_c168eb1][]\"> <label for=\"form-field-field_c168eb1-14\">Other<\/label><\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-upload elementor-field-group elementor-column elementor-field-group-field_2cea676 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_2cea676\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tUpload Your Files (Optional)\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t<input type=\"file\" name=\"form_fields[field_2cea676]\" id=\"form-field-field_2cea676\" class=\"elementor-field elementor-size-sm  elementor-upload-field\">\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-textarea elementor-field-group elementor-column elementor-field-group-field_9ceb2c8 elementor-col-100\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-field_9ceb2c8\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tMessage\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t<textarea class=\"elementor-field-textual elementor-field  elementor-size-sm\" name=\"form_fields[field_9ceb2c8]\" id=\"form-field-field_9ceb2c8\" rows=\"4\"><\/textarea>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Submit<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-123957a9\" data-id=\"123957a9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Table of Contents One of the challenges in PCB design and manufacturing is maintaining signal integrity. Back drilling, also known as controlled-depth drilling, is used to remove the conductive via stubs from the copper sleeves within PCB through-holes, improving signal integrity. This article introduces the principles and features of back drilling technology, offering design parameters [&hellip;]<\/p>\n","protected":false},"author":26,"featured_media":21699,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[44],"tags":[89],"class_list":["post-21698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-pcb-via"],"_links":{"self":[{"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/posts\/21698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/comments?post=21698"}],"version-history":[{"count":21,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/posts\/21698\/revisions"}],"predecessor-version":[{"id":21726,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/posts\/21698\/revisions\/21726"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/media\/21699"}],"wp:attachment":[{"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/media?parent=21698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/categories?post=21698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.elepcb.com\/it\/wp-json\/wp\/v2\/tags?post=21698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}