The names of the circuit boards are: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum substrate, high frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra Thin circuit boards, printed (copper etching technology) circuit boards, etc. The circuit board makes the circuit miniaturized and intuitive, which plays an important role in the mass production of fixed circuits and the optimization of the layout of electrical appliances.

Printed circuit board (PCB circuit board) is an indispensable accessory in modern electronic equipment. All electronic equipment, whether it is large machinery or personal computers, communication base stations or mobile phones, household appliances or electronic toys will use printed circuit boards .
The composition of the printed circuit board is mainly composed of two types of materials, an insulating base material and a conductor, which play the role of supporting, interconnecting and some circuit components in electronic equipment. The integrated circuit and the electronic components such as resistors and capacitors cannot function as a single individual. Only when there is a foothold on the printed circuit board and there are guide junctions to connect it, can it function in this whole. The printed circuit board is the skeleton that supports the components and the pipeline that connects the electrical signals. In addition, some printed circuit boards have resistors, capacitors, inductors and other components attached to them, which become functional circuits and function as tubes.

The role of printed circuit boards in electronic complete equipment is: to provide mechanical support for fixing and assembly of transistors, integrated circuits, resistors, capacitors, inductors and other components; to achieve transistors, integrated circuits, resistors, capacitors, inductors and other components The wiring and electrical connection and electrical insulation between them meet their electrical characteristics; they provide identification characters and graphics for the inspection and maintenance of components in the electronic assembly process, and solder resist patterns for wave soldering.

Due to the use of printed circuit boards in electronic complete equipment, the errors of manual wiring are avoided, and automatic insertion, welding and inspection are realized. Therefore, the quality and reliability of the electronic complete machine product are guaranteed, the labor productivity is improved, the production cost is reduced, and the maintenance is convenient.