When we open the general keyboard of the computer, and will be look a soft film(flexible insulation material), are printed on white silver (silver paste), electrical conductivity and health-bit graphics graphics. General screen as missing graphics such methods, we as the Flexible Printed Circuit Board, said that PCB silver paste. And we see the city's computer to a variety of computer motherboards, graphics cards, network cards, modems, sound cards and household appliances on the printed circuit board is different. It is the base material used by the paper-based (often used for single-sided) or Burkina glass (often used for multi-layer and double-sided), phenolic or epoxy prepreg, a surface or attached on both sides and then laminated book Pour curing Formed. This board book Copper plates, we call on the rigid board. Printed Circuit Board made again, we call on the rigid Printed Circuit Board. There are single-sided printing graphics line we call one-sided PCB, there are two-sided printing graphics line, and then through the hole of the metal for the formation of the double-sided PCB interconnection, and we call on the two-panel . If the inner layer made with a piece of double-sided, single-sided 2 for 2 or outer layer for double-sided, 2 for the outer side of the PCB, through the positioning system and insulation materials bond together and turn Graphic design by conducting interconnection requirements of the PCB has become a four-storey, six layers of printed circuit boards, also known as multi-layer printed circuit boards. Now, there are over 100 practical level the PWB.