Jingsong. Xie and Michael Pecht
CALCE Research Center
University of Maryland
Thomas & Betts Corporation
Attleboro Falls, MA 02763
Sun Microsystems Computer Company
Palo Alto, CA 94303
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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