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 storey density multilayer professional supplier, to provide customers with high-precision high quality Shenzhen board, quality assurance, reasonable prices. Reflux is most important at this stage, when all of the individual particles melt the solder circuit board technology, combined together to form a liquid tin flexible circuit board technology, then the surface tension of the solder surface of the foot began to form, if component lead and PCB pad gap over 4mil (1 mil = thousandths of an inch), then most likely due to the surface tension so that the pins and pads separately, that cause open solder joints. 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 ceramic circuit board technology 2-40 storey density multilayer boards for provide high-precision, high-quality customer Shenzhen circuit board, circuit board welding process to ensure quality and reasonable prices. The solid surface contact area of ??the foil web should be replaced by a cross; to ensure the accuracy of the wire, the wire width according to eclipse the original ratio increases (negative phase graphic terms) or small (in terms of the positive phase graph); graphics sides must be clear, indicating the welding surface, component side; multilayer graphics to indicate the number of layers; the wire impedance characteristics required should be specified; minimize unnecessary fillets, chamfers, with particular attention to machinery and photographic processing blueprint (or light painted film) the film should have the same consistent reference datum; to reduce costs, increase productivity, try to less aperture combined to reduce excessive aperture species; Guangdong circuit board technology | HDI circuit board technology | Newell record (certified merchants) by the Department of Shenzhen-Electronic Technology Limited. Newell Shenzhen Electronic Technology Co., Ltd. (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 most quality products and services. Welcome to inquire! Contact: Huang Shengxing.