Patent ID: 7227429
Filing Date: 2007-06-05
Classification: H01L,H03H,Y10T

Abstract:
1. A surface acoustic wave device comprising: a piezoelectric substrate having a first surface on which comb-like electrodes, first pads connected thereto, and a first film are provided, the first film being located so as to surround the comb-like electrodes; a base substrate having a second surface on which second pads joined to the first pads and a second film joined to the first film are provided; an electronic element provided on an area of the second surface facing the first surface; and a ceramic substrate supporting the base substrate, a chip electronically coupled to the second pads being mounted on the ceramic substrate, the base substrate having a plate shape, and the first and second films joined by a surface activation process defining a cavity in which the comb-like electrodes, the first and second pads, and the electronic element are hermetically sealed.