source:Other information release time:2022-12-19 Hits: Popular:PCB Assembly company
The domestic research on the automatic detection system of printed circuit board started in the middle school of the 1990s, and has just started. There are few research institutes engaged in this field, and because of the influence of various factors, the research on automatic optical detection system for PCB defects also stays at a relatively early level. Because the automatic detection system for printed circuit boards in foreign countries is too expensive, and there is no real automatic detection equipment for printed circuit boards in China, most domestic manufacturers of printed circuit boards still use manual magnifier or projector for inspection. Due to the labor intensity of manual inspection, eyes are prone to fatigue, and the rate of missed inspection is very high. Moreover, with the development of electronic products towards miniaturization and digitalization, printed circuit boards are also developing towards high-density and high-precision. It is basically impossible to use manual inspection methods. For circuit boards with higher density and precision (0.12-0.10mm), it is impossible to inspect them. Due to the backwardness of detection methods, the qualification rate of domestic multilayer boards (8-12 layers) is only 50~60%.
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