The viscoelastic and viscoplastic properties of polymer films, an underfill, and a molding compound are reported in this paper. The scale effect is also investigated preliminarily. A constitutive framework from viscoelasticity to viscoplasticity is then proposed to describe the deformation characteristics. The significance of the nonlinear characteristics of polymer films and filled polymers to the selection of adhesives and determination of adhesive strength is discussed
Published in:
Adhesive Joining and Coating Technology in Electronics Manufacturing, 1998. Proceedings of 3rd international Conference on
Date of Conference: 28-30 Sep 1998