外引线弯曲疲劳断裂原因及其影响因素  

Reasons and Influencing Factors of Bend Fatigue Fracture for Leads

作　　者：刘飞华[1] 冷文波[1] 沈卓身[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《半导体技术》2004年第11期32-35,48,共5页Semiconductor Technology

摘　　要：通过SEM观察了经历不同弯曲次数疲劳试验的可伐合金引线样品,分析了引线在弯曲试验中所受的应力,提出了外引线弯曲疲劳断裂的失效模型,并讨论了施加的载荷、玻璃弯月面以及表面覆盖层对外引线弯曲疲劳断裂行为的影响。Sample sections of kovar alloy lead subjected deferent numbers of bend in fatiguetest were observed by SEM. The applied stresses of lead during test were analyzed and a failuremodel of fatigue fracture for leads was established. The effects of applied load, glass meniscus andsurface coating on fatigue of leads were also discussed.

关 键 词：可伐合金 引线 疲劳 断裂 

分 类 号：TN305.93[电子电信—物理电子学]