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 storey density multilayer professional supplier, Guangdong gold-plated circuit boards, to provide customers with high-precision, high-quality circuit board in Shenzhen, quality assurance, gold-plated circuit board details of the deal, the price is reasonable. Microetched aims to clean copper surface oxidation and residue left before the process, keep it fresh and increasing the nickel layer adhesion between the copper surface, commonly used micro-etching solution is an acidic solution of sodium persulfate. Nickel metal production but also the use of sulfuric acid or acidic hydrogen peroxide solution of potassium persulfate microetch carried out. Because copper ions on micro-erosion rate is high, the concentration of copper ions generally control shall have 5 ~ 25g / L, in order to ensure microetch rate at 0.5 ~ 1.5μm, the production process, when changing the cylinder often reserved 1/5 ~ 1/3 cylinder liquor (old solution), in order to maintain a certain concentration of copper ions, but also a small amount of chloride ions to strengthen the micro-corrosion 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 storey density multilayer professional supplier, to provide customers with high-precision high quality Shenzhen board, quality assurance, reasonable prices. As for the operating control of nickel-cylinder, in terms of temperature, different series Nickel different potions its control. Under normal circumstances, the nickel cylinder operating range 86 ± 5 ℃, and some potions control in 81 ± 5 ℃. In production, the specific set according to the results of the test plate to set the different types of system boards, there may operate at different temperatures. Operating range generally yield a system board only ± 2 ℃, individual system boards may also be less than ± 1 ℃. In the concentration control, the use of the control to regulate the Ni content of the other components, when the Ni concentration is below the set value, automatically starts tonic solution added to make up a certain amount of consumption of Ni, while the other components are based on Ni fill rata amount added simultaneously. Gold-plated circuit boards Suppliers | Guangdong gold-plated circuit board | 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!