PCB, which stands for Printed Circuit Board, is often referred to as the "mother of electronic components." Its applications are quite extensive, primarily because it serves as the essential substrate for assembling electronic components, acting as the framework for electronic parts. It allows various components to connect and transmit signals and currents through the metal copper foil traces on the board. Currently, PCBs are mainly used in fields such as information technology, communications, consumer products, automotive, aerospace, industrial control, and military applications.