Manufacturing process of printed circuit boards

Manufacturing method of printed circuit boards

The manufacture of printed circuit board (PCB) is to transfer the printed circuit board diagram of printed circuit board to the laminated board.

There are two methods of making it, that is,subtraction method and addition method.

1)The subtraction method is the protective anticorrosive material  is first applied to fill the steel foil with the substrate 1 to form the PCB pattern on the manufactured laminate and then to etch the unneeded part by chemical mechanical method. After the etching is over, the corrosion resistant layer is removed. The final step is a printed circuit made of copper foil.

2)The addition method,is the chemical deposition of copper on the insulating substrate without copper clad box. The anti-corrosion agent is used to transfer the reverse PCB plate diagram, and then the surface of the plate is cleaned and the metal layer is electroplated. At this time, the metal layer figure is the PCB board diagram. Then, the corrosion inhibitor can be removed.

At present, the commonly used method of making printed circuit board is subtraction method.

According to the different methods of graphic transfer, the forming method is divided into screen leakage printing method, photographic sensitive offset printing method and graphic electroplating etching method and so on.

This article is from Allicdata Electronics Limited.