FEM modelling of porosity in Ag sintering die attach for RF power applications

摘要

In this paper, a modified Gurson model was developed to simulate the mechanical behavior of silver sintered materials in which the porosity is ranging from 5% to 40%. The effect of shear stress, void size, and porosity- and temperature-dependent elastic properties of the porous materials were added into the standard Gurson model. Tensile and shear test simulations showed that the proposed Gurson model is capable in describing the mechanical behaviors of the Ag sintered specimen. The thermal cycling test (TMCL) simulations further showed the capability of the proposed Gurson model in the design of RF power applications.