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 quality Shenzhen board circuit board material, quality assurance, reasonable prices. Usually two dielectric multilayer outermost layers are the wetting layer, use a separate layer as an outer layer of copper foil on the outside of these two layers. Copper foil outer and inner original thickness specifications, generally 0.5OZ, 1OZ, 2OZ (1OZ about 35um or 1.4mil) Three circuit board materials suppliers, but after a series of surface treatment, the outer layer of copper The final thickness of the foil will generally increase by nearly 1 OZ. The inner foil is copper-clad on both sides of the core plate, the final thickness of the original thickness difference is small, but because of etched circuit board material production process, usually cut several um. 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. What is a high Tg PCB board and use the advantage of high Tg PCB high Tg PCB when the temperature rises to a certain area when the multi-layer circuit board materials, substrates will be "glassy" to "rubbery" at this time temperature called the glass transition temperature of the plate (Tg). That is, Tg of a rigid substrate holding maximum temperature (℃). That common PCB substrate material at high temperature, produce only softening, deformation, melting phenomena and also reflected in the sharp decrease in the mechanical, electrical characteristics. Shenzhen circuit board material, board material grade, Newell record (certified merchants) are provided by Shenzhen-Year of the Electronic Technology Co., Ltd. Shenzhen-Year of the Electronic Technology Co., Company (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 highest quality products and services. Welcome to call ! Contact: Huang Shengxing.