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, professional supplier of circuit board material stability 2-40 layer plywood for customers provide high-precision, high-quality Shenzhen circuit board circuit board material sales, quality assurance, reasonable prices. Protective layer: mainly used to ensure that the board does not need a place not to be Tin Tin circuit board materials, so as to ensure the reliability of the circuit board operation. Top Paste and Bottom Paste which are the top and bottom solder mask solder resist layer; Top Solder and Bottom Solder Paste were protective layer and the underlying protective layer of paste. Silkscreen: mainly used serial number, production number, company name, etc. on the printed circuit board components. 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. PCB exposed hole plating mask forming process, involving the circuit board vias hole wall, welding position, the circuit board is partially coated or plated with thick lines in different metal layers associated processes; comprising the steps of: (1) Select the vias CCL has metalized blocks or boards; (2) an ink or paste printing photographic photosensitive dry film, and photographic ink drying; (3) has drawn a good light vias holes or welding position or line part Local film to be thickened, counterpoint exposure; (4) developing the exposed after the exposed light solid vias holes or welding position or line part of the partial vacancy needed to be thickened or welding position; (5) masking plated hole to a desired thickness; (6) In addition to the surface of the photosensitive dry film or masking ink, was vias holes or welding position or line to be part of the local thickening of CCL blocks or circuit board. The process is simple, can be a great saving of copper, other metals and chemicals, less environmental pollution. Newell record (Figure) _ circuit board material prices _ Guangdong circuit board material provided by the Department of Shenzhen-Electronic Technology Co., Ltd. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) adhere to the "people-oriented" business philosophy, with a professional staff, and strive to provide the best products and services to contribute to the community, and welcome new and old customers throughout the visit, sincere cooperation for a better future. Newell create - your trusted friend, Company Address: Bao'an District of Shenzhen City forward Road Newell Innovation Center B507, Contact: Huang Shengxing.