Patent ID: 8803402
Filing Date: 2014-08-12
Classification: H03H

Abstract:
1. An elastic wave device comprising: a piezoelectric substrate having a reciprocal velocity plane which is concave in a propagating direction in which an elastic wave propagates; and an elastic wave resonator including a comb-shaped electrode pair which includes a first comb-shaped electrode and a second comb-shaped electrode both provided on the piezoelectric substrate, the first comb-shaped electrode and the second comb-shaped electrode interdigitating with each other, comb-shaped electrode pair being configured to trap energy of the elastic wave therein, wherein the first comb-shaped electrode includes a first common electrode and a plurality of first interdigital electrode fingers connected to the first common electrode, wherein the second comb-shaped electrode includes a second common electrode and a plurality of second interdigital electrode fingers connected to the second common electrode, the plurality of second interdigital electrode fingers interdigitaing with the plurality of first interdigital electrode fingers, and wherein the elastic wave resonator has: