“…The problem in the edge effects was analyzed by Aleck (1949), the elastic one contained in the solutions (Lee and Jasiuk, 1991), and the problem was discussed with finite element method by Lau (1989). From a few concrete reports by using finite element analysis (FEA), PCBs had been represented by isotropic models (Yang et al, 2000;Wu et al, 2002;Wang et al, 2003). However, the mechanical properties of the laminate PCBs are different in the orthogonal directions with the plane of PCBs (Moore and Jarvis, 2002).…”