The creator of PCB is Austrian Paul Eisler. In 1936, he first used printed circuit board in radio. In 1943, most Americans used the technology in military radio. In 1948, the United States officially approved the invention for commercial use. Printed circuit board has been widely used since the mid-1950s. Printed circuit board will appear in almost every kind of electronic equipment. If there are electronic parts in a certain device, they are all embedded in PCB of different sizes. The main function of PCB is to make all kinds of electronic components form a predetermined circuit connection, which plays the role of relay transmission. It is the key electronic interconnector of electronic products, known as "the mother of electronic products".
