Printed circuit board (PCB), also known as printed circuit board, is a provider of electrical connection of electronic components
Our common computer boards are basically epoxy resin glass cloth-based double-sided printed circuit boards, one of which is a plug-in component and the other side is a component foot welding surface. It can be seen that the solder joints are very regular. We call it the pad for the discrete soldering surface of the component feet
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
