When we get a piece of PCB board and don’t have any other test tools on the side, how to quickly have a judgment on the quality of a PCB board, we can refer to the following 6 points:
1. The size and thickness of PCB board must be consistent with the specified size and thickness without deviation. There shall be no defect, deformation, fall off, scratch, open circuit, short circuit, oxidation white, yellow, etching unclean or excessive traces of etching, and there shall be no stains, copper particles and other impurities on the surface.
2. Ink cover uniform gloss, no fall off, scratch, dew copper, offset, hanging plate and other phenomena.
3. Silkscreen printing symbols and letters clear, no omissions and blur, reverse printing, offset and other undesirable phenomena.
4. The carbon film shall not have defects, printing bias, short circuit, open circuit, printing and other phenomena.
5. PCB bottom plate forming, there shall be no leakage, offset, hole collapse, edge, plug hole, beer burst, beer reaction, crushing and other phenomena.
6. Whether the edge of PCB board is smooth or not. If it is a V-cut process, it is necessary to pay attention to whether the V-cut groove leads to wire break and whether the two sides are symmetrical.
Generally through these 6 points, you can quickly judge the good of PCB board.
Post time: Mar-19-2021