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 module, the price is reasonable. The difference between 4-layer laminates and 6/8 way is by observing the blind hole. Because the graphics card and the motherboard used is 1,4 layer 4-layer alignment, the other layers for other purposes (ground and power). So, with double plate as a guide hole will be pierced board. If some holes in the front panel appears, but could not find the phone in the back of the circuit board module, then it must be a 6/8 shelves. If you can find, nature is 4 layers. In multilayer PCB, in addition to the alignment layer, in general, the whole floor will have a direct connection on the ground and the power supply. So we will be classified as such layers power level (Power) or ground plane (Ground). If the parts on the PCB require different power supply, generally have two or more of such PCB power and ground layers. 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 HDI circuit board professional supplier module, providing customers high-precision, high-quality circuit board in Shenzhen, quality assurance, reasonable prices. As electronic devices become more complex, requiring more and more parts of the natural multi-layer circuit board module, PCB top of the line and part of more and more intensive. Bare board (top no parts) is also often referred to as 'the printed circuit board Printed Wiring Board (PWB)'. The base board itself is insulated, it is not easy to bend the material made into. Can be seen on the surface of fine copper wiring material, copper foil originally covering the entire board, and in the part of the manufacturing process is etched disposed, he left to become part of the mesh of the fine line . These lines are called conductors or said wiring, and used to provide part of the circuit connected to the PCB Guangdong circuit board modules, four circuit board modules, Newell record (certified merchants) - The Department of Shenzhen Electronic Technology Co., Ltd. provided by. 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.