PCB quality inspection standards
The quality inspection of PCB circuit board generally includes appearance inspection, connectivity inspection and solderability inspection.
1. Standards for PCB circuit board appearance inspection
1. Whether the surface of the PCB circuit board is smooth and flat, whether there are bumps or scratches. Whether the through hole is leaked, wrongly drilled, or the surrounding copper foil is drilled.
2. The integrity of the wire pattern, cover the PCB circuit board with a photographic film, and determine whether the wire width and shape meet the requirements. There are no trachoma or broken line on the printed line, whether there is a jagged gap on the edge of the line, whether there is a short circuit in the wire that should not be connected.
3. Whether the size of the outer edge of the PCB circuit board meets the requirements.
Second, PCB circuit board connectivity inspection standards
Connectivity test is required for multilayer PCB circuit boards. Usually use a multimeter to check whether the PCB circuit board is connected.
Three, PCB circuit board solderability inspection standards
Inspection: When soldering components to the PCB circuit board, the wetting ability of the solder to the PCB circuit board pattern.