Printed Circuit Board (PCB) refers to a functional board with conductive circuit patterns or printed components formed on an insulating substrate according to a predetermined design by using printing technology, which is used to realize the interconnection and relay transmission between electronic components. It is an indispensable basic component of electronic information products. The manufacturing quality of PCB directly affects the reliability of electronic products and the overall competitiveness of system products, so PCB is called "the mother of electronic system products".
To some extent, the development level of PCB industry reflects the development speed and technical level of electronic industry in a country or region. PCB exists in almost all electronic devices, and the reliability and competitiveness of electronic products depend on the manufacturing quality of PCB to a great extent.