引线键合楔形劈刀及劈刀老化现象研究

Research of Bonding Wedge and Its Degradation Phenomenon

劈刀是引线键合过程中的重要工具,其选型与性能决定了键合的灵活性、可靠性与经济性。介绍了微组装引线键合常用楔形劈刀的结构、材料及选型思路,阐述了劈刀老化现象。研究得出,劈刀老化的原因为劈刀刀头端面磨损与刀头端面生成物影响,劈刀刀头端面磨损不可逆转,劈刀刀头端面生成物可使用清洗方法去除,可使劈刀在磨损失效前继续使用。

Bonding wedges are one of the most important tools in bonding process. The selection and performance of bonding wedge determine the flexibility, reliability, cost of bonding process. The structure, material and selection method of bonding wedge were introduced. The degradation of bonding wedge and the reasons of degradation were expatiated. The results showed that the the degradation reasons of bonding wedges are wear of the wedge tip and the resultant on the tip during bonding process. The wear of the wedge tip is irreversible. The resultant on the tip can be removed by cleaning method, so that the wedge can continuously be used before wear failure.