source:Industry News release time:2022-06-11 Article author:yu Popular:pcb
The manufacturing process of PCB has developed rapidly. Different types of PCBs with different requirements adopt different processes, but the basic process flow is the same. Generally, it has to go through the process of film plate making, pattern transfer, chemical etching, via and copper foil processing, flux and solder mask processing.
The PCB manufacturing process can be roughly divided into the following five steps:
The first step of PCB production is film plate making
The second step of PCB production graphics transfer
The third step of PCB fabrication optical method
The fourth step of PCB production via hole and copper foil processing
The fifth step of PCB fabrication is flux and solder mask treatment
The first step of PCB production is film plate making
1. draw basemap
Most of the basemaps are drawn by designers, and in order to ensure the quality of printed board processing, PCB manufacturers need to check and modify these basemaps. If they do not meet the requirements, they need to be redrawn.
2. photoengraving
Use the drawn base map to make a photo plate, and the layout size should be consistent with the PCB size.
The process of PCB photographic plate making is roughly the same as that of ordinary photography, which can be divided into: film cutting-exposure-development-fixing-washing-drying-revision. Before performing photography, you should check the correctness of the base image, especially the base image that has been placed for a long time.
Before exposure, the focal length should be adjusted, and the double-sided photo plate should keep the same focal length of the two photos on the front and back; the photo plate needs to be revised after drying.
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