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, gold-plated circuit board substrate selection, reasonable prices. In the trial stage gold-plated circuit board production processes, and other factors affect the procurement of components is often not the board came immediately welding, but often have to wait a few weeks or even a month before the circuit board with gold-plated stick and force, gold plate standby life (shelf life) many times longer than the pewter so we are willing to adopt. 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. When the tank wall and bottom sediments appear gray and black, you need to deal with nitrate groove. The procedure is as follows: Add 1: 1 nitric acid, the above start circulating pump 2 hours or until the groove wall gray-black deposits completely removed. Heating may be considered appropriate, but should not exceed 50 ℃, in order to avoid air pollution. In addition, some people think residue activated with a palladium ions in the washing process can cause hydrolysis, thus causing adsorption diffusion coating on a substrate, it should be washed after activation countercurrent, pay more sulfuric acid or hydrochloric acid after leaching and counter-current washing manufacturing process. Guangdong gold-plated circuit boards | circuit board gilt metal thickness | Newell record (certified merchants) by the Department of Shenzhen-Electronic Technology Limited. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) in the printed circuit board in this area devoted boundless enthusiasm and passion, Newell has been creating customer-centric, for customers to create Idea value, quality, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Huang Shengxing.