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. Section and strong copper ring (MLB) of non-metallic hole, to be treated non-metallic epoxy resin, glass filaments of the second portion. Section and copper (plywood) of surface of the ring-bodied. Copper substrate surface with positive charge, the non-metallized substrate surface with a uniform weak negative charge, plywood after Desmear treated more negatively charged. When activated palladium colloid micelles are negatively charged, so negative negative repulsion, palladium colloid can not be effectively adsorbed copper clad circuit board substrate, so to change the surface of the plate, especially the non-metallized surface electrical properties Kenai Germany - The 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-quality Shenzhen circuit board, quality assurance, reasonable prices. Capacity up Objective: to soften the bulk epoxy multilayer circuit board copper precautions can reduce the bonding between the polymer, so that the early formation of KMnO4 more bite eclipse rough surface can reduce the dissolution weak bonding to bonding With significant differences. If you soak too long, strong bonding also gradually reduce how copper circuit board, 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. Copper clad circuit board substrate | Guangdong circuit board copper | Newell Newell hit by the Shenzhen Electronic Technology Limited. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) strong, credible, a printed wiring board in Shenzhen, Guangdong and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Newell invasive and you hand into the brilliant, for a better future!