Patent ID: 6331679
Filing Date: 2001-12-18
Classification: H01L,H05K

Abstract:
A semiconductor device comprising:a multilayer circuit board using an anisotropic electro-conductive adhesive layer, comprising a substrate on which a first circuit pattern is formed, an anisotropic electro-conductive adhesive layer formed on a surface of the substrate on which the first circuit pattern is provided, said anisotropic adhesive consisting of a thermosetting or thermoplastic resin adhesive base containing electro-conductive particles dispersed therein, and a second circuit pattern formed directly on the anisotropic electro-conductive adhesive layer, wherein an end of the second circuit pattern is curved into said base of the anisotropic electro-conductive adhesive layer to be closer to the substrate and electrically connected to the first circuit pattern via the electro-conductive particles and a second end of the second circuit pattern provides a land;a semiconductor element mounted on said anisotropic electro-conductive adhesive layer in such a manner that electrode terminals of said semiconductor element are electrically connected to said lands; andan underfill layer comprising resin filled in a space between said semiconductor element and said anisotropic electro-conductive adhesive layer.