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. Circuit board according to grade level from bottom to high divided as follows: 94HB / 94VO / 22F / CEM-1 / CEM-3 / FR-4 details are as follows: 94HB: the ordinary cardboard, not fire (most low-end circuit board material surface treatment , die punching, can not do the power supply board) 94V0: flame Cardboard (die punching) 22F: Semi-sided glass plate (mold punching) CEM-1: single-sided glass plate (must be computer drilling, can not punch) CEM-3: Semi-sided glass plate (except double-sided double-sided cardboard outer belong to the low end of the material, you can use a simple double-sided printed circuit board material this material, will be cheaper than FR-4 5 ~ 10 yuan / square meter) FR-4: double-sided glass plate Snyder International Limited Shenzhen Branch - The Department of Electronic Science and Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, multi-layer 2-40 board of professional providers, to provide customers with high-precision, high-quality circuit board in Shenzhen, 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) are three, but after a series of surface treatment, final thickness of the outer layer of copper foil is generally It will increase by nearly 1 OZ. The inner foil is a copper-clad circuit board material stability on both sides of the core plate, the final thickness of the original thickness difference is small, but because of the etching reasons, usually cut several um. Circuit board material stability, Henan circuit board materials, 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!