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. Problems surface tension or small hole, anything is possible residual air bubbles, and the surface tension of the hole invasion has a significant influence. So the use of relatively high temperature operations, helping to lower the surface tension and remove air bubbles. As for concentration problems, in order to reduce consumption and the use of a slightly lower concentration, as long as the device properly designed, in fact, higher concentrations can also operate and faster. In the process, it must first hole wall invasion, later to make the syrup into the role of PTH board there are air bubbles or residual air malpractice Shen copper circuit board, follow the process more difficult to sink into the hole copper circuit board copper thickness, the residues can not be removed .. 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 of Shenzhen Shen copper circuit board circuit board, quality assurance, reasonable prices. And MLB216 --- decontamination after clearing the residual MnO2, NaOH and potassium permanganate, to ensure that the hole wall is the best condition, which can effectively avoid plating voids, poor bonding hole wall electroless copper layer and pollution subsequent processing bath and other issues; Shen copper section one: the inner wall plate by drilling holes in two parts ① whole process is still covered with copper foil substrate surface ② After drilling the formation of an epoxy fiberglass PTH PCB color reasons, Newell invasive, Guangdong Shen copper circuit board provided by the Department of Shenzhen-Electronic Technology Co., Ltd. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!