ABSTRACT:

This paper presents our recent study on the mechanical behavior of conductive elastomerinterconnects for the assembly of land-grid-array and ball-grid-array package. Stiffness and contact-force relaxation were measured. Taking into consideration the actual operating conditions of the sockets, the effects of both environmental temperature and initial contact force on contact-force relaxation behaviors of conductive elastomer interconnects were investigated. The results show that temperature, tather than initial contact force, correlates with the long-term relaxation behavior of conductive elastomer interconnect.

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