Patent ID: 8004160
Filing Date: 2011-08-23
Classification: H01L,H03H,Y10T

Abstract:
1. An acoustic wave device comprising: a substrate; an acoustic wave element provided on the substrate; an electrode pad that is provided on the substrate, is electrically coupled to the acoustic wave element, and has an Au layer and an adhesive layer formed on the Au layer and having an opening; a resin portion that is provided on the substrate so as to cover the acoustic wave element and the electrode pad, wherein the resin portion has a through-hole formed so as to expose a surface of the electrode pad; a metal post that is provided in the through-hole and contacts with the Au layer through the opening of the adhesive layer; and a Si compound layer that is provided between the adhesive layer and the resin portion and contacts with the adhesive layer and the resin portion, wherein the adhesive layer is provided between the Au layer and the resin portion, and wherein the adhesive layer is made of a material that provides for a degree of adhesion between the adhesive layer and the Si compound layer that is higher than the degree of adhesion between Au and the Si compound layer.