IEEE Transactions on Components and Packaging Technologies, Vol. 30, NO. 1, pp. 81-85, March 2007

Contact Resistance Estimation for Time-Dependent Silicone Elastomer Matrix of Land Grid Array Socket

Shuang Yang, Ji Wu, and Michael Pecht
University of Maryland
College Park, MD 20742

Derek Tsai
Sun Microsystems
Santa Clara, CA


A land grid array (LGA) socket provides high density, electrically-separable interconnect between a component and a printed circuit board. The LGA socket must not be susceptible to creep and stress relaxation, which can lead to loss of contact force and consequently the degradation of contact resistance. In this paper, the time-dependent contact resistance failure mechanisms were experimentally assessed and theoretically analyzed for silicone elastomer matrix socket interconnects. A time-dependent physics-of-failure model was developed for contact resistance simulation.

Complete article is available to CALCE Consortium Members.

© IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.


[Home Page] [Articles Page]
Copyright © 2008 by CALCE and the University of Maryland, All Rights Reserved