Based on the research of QFN lead frame welding line technology of Dongguan leywen semiconductor packaging and testing factory, this paper analyzes the structural characteristics of QFN lead frame, the application of fixture, the product technology and other conditions, and understands that there are some problems in the application of general fixture in QFN packaging welding line process, such as: ball or foot, which affect the quality and reliability of the product. The QFN lead frame can be pressed stably by using a precise point press fixture, which can effectively solve the above welding line process problems.<BR>
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