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Nowadays, the technological development of the semiconductor industry, towards the devices dimensions narrowed, the wafer diameter becomes larger, the manufacturing steps increase, the process technology steps into complex and special direction. In the product demand change and the short life cycle circumstances, it's primary goal to keep good quality and productivity. The research is focus on the die surface defects of automated optical inspection before the wafer packaging. 1. Converting the angle of inspection for the fine pitch and vertical spread bump(Reduce inspection time 55% and 30% ; productivity raise 124% and 43%). 2. Expanding the capturing radius and field of view for the roughness of Redistribution Layer(Reduce inspection time 7% and 12%; productivity raise 7% and 14%). 3. Inspecting partial die by dark field lighting(Reduce inspection time 27% and 20% ; productivity raise 36% and 24%). According to the result show that can reduce the inspection time and increase productivity, to achieve the purpose of improving efficiency.
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