Patent ID: 9647635
Date: 2017-05-09
CPC Classifications: H01L,H03H

Claim:
1. An elastic wave resonator comprising: a piezoelectric substrate; and a pair of comb-shaped electrodes provided on an upper surface of the piezoelectric substrate, the pair of comb-shaped electrodes including first and second overlapping regions in which electrode fingers of the comb-shaped electrodes interdigitate, the second overlapping region being provided on both outside edges of the first overlapping region in an overlapping width direction, an overlapping width of the first overlapping region being greater than an overlapping width of the second overlapping region, an electrode finger pitch in the second overlapping region being greater than an electrode finger pitch in the first overlapping region, the first overlapping region including a first number of electrode fingers, and the second overlapping region including a second number of electrode fingers fewer than the first number of electrode fingers.