An Investigation on the Mechanical Behavior of Elastomer Interconnects

摘要

This paper presents our recent study on the mechanical behavior of conductive elastomer buttons used as interconnects for LGA/BGA (Land Grid Array/Ball Grid Array) package assemblies. Stiffness measurements and contact force relaxation measurements were performed. In consideration of the actual operating conditions of the sockets, the effects of both environmental temperature and initial contact force on the contact force relaxation behaviors of the conductive elastomer buttons were investigated. The results show that temperature, rather than initial contact force, plays a dominant role in determining the long-term relaxation behavior of conductive elastomer buttons.