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. Production of copper foil if requirements are relatively high, so in the production process. The possibility of the problem is not large, but there are two more serious problem of copper foil, a pinhole (pores), eight circuit board module, a surface oxidation, due to the production of CCL are based on copper plating form so that if the plating solution impure, then it is easy to produce pinholes, while copper production is completed, the circuit board module manufacturers in Shenzhen, if improperly stored, Guangdong circuit board module will oxidation. With such a foil produced CCL, of course, a grade B board. Glass cloth impregnated with epoxy resin after a rapid warming, followed by rapid cooling of the glass cloth and epoxy resin combined into a cured state, known as prepreg. But the cured state is very unstable, and therefore must be placed in 20 ° about the problem, save, and the shelf life is very short. If you take that expired prepreg to pressure CCL, then out of the course grade plate Section B 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 supplier, to provide customers with high-precision, high-quality circuit board in Shenzhen, quality assurance, reasonable prices. How to solve the increasingly complex circuit design it? Double panel appeared. This has both surfaces of a wiring board. However, to use on both sides of the wire must be between the two sides have the proper electrical connection down. So, people come up with a way - Punch! "Bridge" between this circuit is called pilot hole (via). Pilot hole in the PCB, four-layer circuit board module, full of holes or painted metal, which can be connected to the wire on both sides. Because the double-sided single-sided area than twice as big, and the wiring can be interleaved with each other (around to the other side). Therefore, it is suitable for use in more complex than single-sided circuit. Circuit board module foil thickness, Newell record (certified), Guangdong circuit board module provided by the Department of Shenzhen-Electronic Technology Co., Ltd. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) is a professional "pcb board" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "division Snyder, Newell a" brand has a good reputation. We adhere to the "service first, customer first" principle, so that record Newell won the trust of customers all of the printed circuit board, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!