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. Bonded Copper PCB is obtained through the etching process. Bonded Copper has a base plate and a copper foil, Shenzhen circuit board, the board is usually made of glass fiber-based insulating material and covered with a layer of copper foil (usually oxygen-free copper). After etching the copper foil remaining after a section of the twists and turns of copper, these foils called traces. These trace function is equivalent to the circuit diagram of those connections, which are responsible for the pin components are connected together. Foil drilled with holes for mounting electronic components, called drilling. And for the component leads soldered copper is called pads. 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, circuit board proofing, reasonable prices. In this part of CCL, B grade plate may appear There are three main, a glass cloth defects in materials, and the second is a problem prepreg or expired, circuit board material, and the third is a copper foil pinholes and oxidation, and On CCL manufacturing process will produce B-level board may, a process is a glass cloth impregnated with epoxy resin at the time, not all impregnated, bubbles exist. The second is in Overlaid CCL, the pressure with the temperature right, resulting in gum or rubber, circuit board design, which also generates a B-level board. Above that is the core material of PCB CCL produces a B-level board, and a lot of PCB manufacturing process, will also have a lot of B board circuit board circuit board design _ _ Newell Shenzhen by the Shenzhen-Year Electronic Technology Department 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!