Single-sided circuit board inspection defect definition.
1, PT surface: soldering surface.
2, MT surface: parts assembly surface.
3, light defects: because of its poor quality, may make the performance of the printed wiring board has been reduced, life has been shortened.
4, minor defects: due to its poor quality may reduce the value of goods, but does not affect the performance and life of the printed wiring board, etc..
5, conical hole: due to the stamping model of the upper type perforation and the lower type of the hole gap is too large, stamping perforated parts, such as the shape of the hole section to the assembly side of the parts open horn shape.
6, heavy defects: due to its poor quality so that the printed circuit board can not be used for the intended purpose.
7, conical hole: due to stamping model of the upper type of perforation and the lower type of hole gap is too large, stamping perforated parts, such as the hole cross-sectional shape to the assembly side of the parts open horn shape.