According to the base material, PCB can be divided into flexible circuit board, rigid circuit board and rigid flexible combination plate, which are used in different equipment according to different purposes.
In 1936, Austrian Paul Eisler first used printed circuit board in radio. In 1943, Americans mostly applied this technology to military radios. In 1948, the United States officially recognized that this invention can be used for commercial purposes. Since the mid-1950s, printed circuit boards have been widely used.
Electronic products should use PCB. PCB (printed circuit board) is used in almost all electronic products and is considered as the "mother of electronic system products".
There are three methods of resist coating: liquid resist coating method and FPC resist coating method for circuit board
Why does the resistivity of semiconductor go down with temperature？Between the conductor and semiconductor resistivity difference is due to the different density of charge carriers.
Reasons for blistering of multilayer circuit board
