PCB also called printed circuit board, PCB multilayer board refers to a printed board with more than two layers. PCB multilayer board is composed of connecting wires on several layers of insulated substrates and pads for assembling and soldering electronic components. It has both conductive layers and interconnections.

PCB multilayer board refer to multi-layer circuit boards used in electrical products. PCB multilayer boards use more single-sided or double-sided wiring boards. Use one double-sided as the inner layer, two single-sided as the outer layer or two double-sided as the inner layer and two single-sided as the outer layer of the printed circuit board. The positioning system and the insulating bonding material alternately together and the conductive pattern Printed circuit boards that are interconnected according to design requirements become four-layer and six-layer printed circuit boards, also known as multilayer printed circuit boards.

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