Patent ID: 8008837
Filing Date: 2011-08-30
Classification: H01L,H03H,Y10T

Abstract:
1. A surface acoustic wave device comprising: a piezoelectric substrate configured to propagate an surface acoustic wave thereon; an IDT formed on a first main surface of the piezoelectric substrate and comprising at least one comb-like electrode having a plurality of electrode fingers, wherein a longitudinal direction of each electrode finger is substantially orthogonal to a propagating direction of the surface acoustic wave; a protective cover comprising a photocurable material and configured to cover a formation region of the IDT so as to form a hollow containing space together with the first main surface, wherein the protective cover has an acid generating portion comprising an acid-generating agent at a lower end thereof; a connecting line formed on the first main surface and connected to the IDT, wherein an end portion of the connecting line is located outside of the protective cover; and a bonding film comprising an insulating material and interposed between the acid generating portion of the protective cover and the connecting line.