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, six gold-plated circuit boards technology, to provide high-precision, high-quality circuit board in Shenzhen, quality assurance, reasonable prices. Before soldering BGA, Shenzhen circuit board technology, PCB and BGA to be in 80 ℃ ~ 90 ℃, 10 to 20 hours in a thermostatic oven baking conditions, the goal is in addition to wave, different and more appropriate level of regulation of moisture baked temperature and time. Not opened the PCB and BGA can be directly soldered. In particular, during all of the following, to wear an antistatic wrist strap or gloves to avoid damage from static electricity may have caused the chip division 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 circuit board in Shenzhen, quality assurance, reasonable prices. Pattern plating resist metals - the main purpose of the tin-lead alloy plating copper coating protected the substrate as etching. However, the coating thickness must be strictly controlled to ensure that the etching process can effectively protect the base metal. Check Item hole metallization coating the inner wall is complete, with or without holes, lack of copper and other defects; check if the surface of the exposed copper surface is uniformly thick copper layers, with or without nodules, with or without sand-like and so on; check bath The chemical composition is within the range prescribed in the process; check the plating area calculated values, coupled with solid production experience based on the value obtained or% compared to finalize the current value; process documents on inspection procedures provided, in accordance with the process requirements to determine the plating process parameters. The surface state of the connection reliability and conducting site inspections groove conductive parts, should be in good condition; before plating process analysis and adjustment of the solution that is analyzed single reference; determining racking parts and fixture preparation. Four mobile phone circuit board technology, the Shenzhen circuit board technology, Newell record (view) 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.