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
At present, most of the holes drilled in the double-sided flexible printed board are still drilled by the NC drilling machine. The NC drilling machine is basically the same as that used in the rigid printed board, but the drilling conditions are different. Because the flexible printed board is very thin, multiple pieces can be overlapped for drilling. If the drilling conditions are good, 10 ~ 15 pieces can be overlapped for drilling.
