{"version":"1.0","provider_name":"Groupe Sprintpcb","provider_url":"https:\/\/www.sprintpcbgroup.com\/fr","author_name":"sprintpcbgroup","author_url":"https:\/\/www.sprintpcbgroup.com\/fr\/author\/sprintpcbgroup\/","title":"Complete Guide to 4 oz Copper PCBs: Core Techniques Explained","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"5byK18xkEf\"><a href=\"https:\/\/www.sprintpcbgroup.com\/fr\/blogs\/4oz-copper-pcb-guide-core-techniques\/\">Complete Guide to 4 oz Copper PCBs: Core Techniques Explained<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.sprintpcbgroup.com\/fr\/blogs\/4oz-copper-pcb-guide-core-techniques\/embed\/#?secret=5byK18xkEf\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0Complete Guide to 4 oz Copper PCBs: Core Techniques Explained\u00a0\u00bb &#8212; SprintpcbGroup\" data-secret=\"5byK18xkEf\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.sprintpcbgroup.com\/wp-includes\/js\/wp-embed.min.js\n<\/script>","thumbnail_url":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/03\/4-oz-copper-pcb-products.webp","thumbnail_width":600,"thumbnail_height":400,"description":"In the manufacturing of thick copper PCBs, we often overemphasize complex testing processes while neglecting the fundamental aspects that truly determine the quality of 4 oz copper PCBs. This article, through practical examples, points out that basic details such as copper foil surface treatment, storage environment, and test pressure settings often have a greater impact on the reliability of the finished product than expensive testing equipment. Instead of pursuing perfect test data, it's better to return to the essence of production and ensure that every simple step is executed correctly."}