[ASME ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems collocated with the ASME 2005 Heat Transfer Summer Conference - San Francisco, California, USA (July 17–22, 2005)] Advances in Electronic Packaging, Parts A, B, and C - Exploring the Possibility of Approximating Viscoelastic Response of Underfill Materials Through the Use of Appropriate Linear-Elastic Material Models