PCB (Printed Circuit Board), the Chinese name is printed circuit board, abbreviated as printed circuit board, is one of the important components of the electronics industry. Almost every electronic device, ranging from electronic watches and calculators to large computers, communication electronic equipment, and military weapon systems, as long as there are electronic components such as integrated circuits, printed boards are used for the electrical interconnection between them. . In a larger electronic product research process, the most fundamental success factor is the design, documentation, and manufacture of the product's printed board. The design and manufacturing quality of printed boards directly affect the quality and cost of the entire product, and even lead to the success or failure of business competition.

The prototype of the PCB circuit board was applied to the telephone exchange system in the early 20th century by using the concept of "Circuit". It was made by cutting metal foil into line conductors and sticking them between two paraffin papers. The PCB was born in the 1930s. It was produced by electronic printing, using an insulating board as the base material, cut to a certain size, with at least one conductive pattern attached to it, and holes (such as component holes, fastening holes, Metallized holes, etc.), used to replace the chassis of the previous electronic components, and to realize the interconnection between electronic components, play the role of intermediate transmission, the support of electronic components, and the "mother of electronic products" called.