A printed circuit board (PCB) is the board base for physically supporting and wiring the surface-mounted and socketed electronic components in most electronics. Components (e.g. capacitors , resistors or active devices) are generally soldered on the PCB. Due to decades' development, PCBs have been constantly contributing to the improvement and progress of people's modern life. PCBs can be classified into different categories according to different classification standards. Based on the number of layers, PCBs can be classified into single-layer PCBs (also called single-sided PCBs), double-layer PCBs (also called double-sided PCBs) and multilayer PCBs (such as four layers board, twenty-four layers board etc.). Based on the rigid-flex properties of the substrate material, PCBs can be classified into rigid PCBs, flexible PCBs and flex-rigid PCBs. Based on application fields, PCBs can be divided into low-frequency PCBs and high-freque...
评论
发表评论