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, research affordable domestic automatic detection system printed circuit board began around 90 years of circuit board proofing junior, has just started. Engaged in research in this area is relatively less research institutes, but also because of the influence of various factors, research for the printed circuit board defect AOI system is also stuck in a relatively early level. Because automatic detection system overseas printed circuit board is too expensive, but there is no developed country in the true sense of the printed circuit board automatic test equipment, so the vast majority of the domestic circuit board manufacturer or artificial with a magnifying glass or a projector to view The approach to the subject side. Due to the large labor-intensive manual inspection, eye fatigue circuit board wire principle, a high leakage rate test. Method and with the electronic products towards miniaturization, digital development, printed circuit boards also moving high-density, high-precision development using manual inspection, the basic impossible. For higher density and precision circuit board (0.12 ~ 0.10mm), have been completely unable to test. Detection means behind the board, led to the current domestic multilayer (8-12 layers) of the product passing rate of 50 to 60%. 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. Modern computer motherboard and graphics card mostly use 4-layer PCB board, there are some 6-layer, or even 8 layer board. Vias (via) we just mentioned, if used in the double-sided board circuit board design principle, then they all went through the entire board. However, in the multilayer which, if you want to connect some of these lines, it will waste some lines vias space other layers. The use of buried vias (Buried via) and blind holes (Blind vias) technology to avoid this problem. Blind hole is connected to the surface layers of the internal PCB PCB, do not have to penetrate the entire board. Buried vias only connect internal PCB, so just do not see from the surface of the circuit board design principle, Newell record (certified), Shenzhen, Guangdong board consists of Newell Electronic Technology Limited. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) Guangdong Shenzhen, printed circuit board leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Newell create leadership with the staff warmly welcome all inquiries negotiations to create Newell create a better future.