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In today's society,PCB is used widely in our all-sides life.As a necessary part, it plays an important role. Therefore, we have to have a good knowledge of PCB. Today I summarized PCB knowledge for you. Definitions: For standard PCB, it is the combination of bare board and components on it. While for bare board PCB, it is called printed wiring board. We usually call it PWB. (1) Traces: The base material of PCB is comprised of dielectric, heat insulation, uneasy to bend materials. On its surface, we can see thin traces, its material is copper. Originally the copper covered the [...]