Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2-40 layer multilayer professional providers, to provide customers with high-precision, high Shenzhen circuit board quality, quality assurance, reasonable prices. Capacity up Objective: to soften the bulk epoxy resin sink copper circuit board, reducing the bonding energy between the polymer, so that more bite KMnO4 early formation of a rough surface erosion can reduce the dissolution weaker bond Shen copper circuit board flatness, it bonding a marked difference. If you soak too long, strong bonding is also gradually reduced, which ultimately caused the piece to a low bonding surface can be increased, if it reaches such a state will not be able to form different intensity junction .. If immersion is too short, it can not form a low bonding and bonding difference, so the bite KMnO4 eclipse is difficult to form a honeycomb surface, which ultimately caused the affect PTH effect. Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2-40 layer plywood professional supplier of heavy copper circuit board sub-layers, to provide customers with high-precision, high-quality circuit board in Shenzhen, quality assurance, reasonable prices. Since the swelling caused by bulky, and because of cohesive strength, so make produce sex-selective PTH board layout principles bite erosion, and the formation of so-called micro-rough. But as a result of excessive corrosion bite, will once again smooth. Bite erosion capacity will vary change with different substrates. Electrodes must be carefully maintained, the electrode efficiency difficult to fix an absolute standard, and it is difficult to confirm whether or not sufficient to meet actual needs. It is usually the experience gained and suppliers to provide information on the needs of the reference electrode copper circuit board _ Shenzhen Shen Shen copper circuit board copper thickness _ Newell record (certified merchants) provided by the Department of Shenzhen-Electronic Technology Co., Ltd. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) is specialized in "pcb circuit board" of the enterprise, the company adhering to the "honesty, hard service" concept, to provide you with the most quality products and services. Welcome to inquire! Contact: Huang Shengxing.