Acoustic wave device, filter, and multiplexer
AssigneeTaiyo Yuden Co., Ltd.
InventorMayu TSUKADA
Life of this patent
Estimating the term…
Abstract
An acoustic wave device includes a substrate, a piezoelectric layer provided on the substrate, and a pair of interdigitated electrodes provided on the piezoelectric layer, each of the interdigitated electrodes including a plurality of electrode fingers that excite an acoustic wave and a busbar to which the plurality of electrode fingers are connected. An anisotropic coefficient γ represented by kx2+γky2=k02 is equal to or more than 1.7, where kx is a wavenumber of the acoustic wave in an arrangement direction of the plurality of fingers, ky is a wavenumber of the acoustic wave in a longitudinal direction of the plurality of fingers, and k0 is a wavenumber of the acoustic wave in a direction inclined from the arrangement direction toward the longitudinal direction.
Claims19
An acoustic wave device comprising:
- a substrate;
- a piezoelectric layer provided on the substrate;
- and
- a pair of interdigitated electrodes provided on the piezoelectric layer, each of the interdigitated electrodes including a plurality of electrode fingers that excite an acoustic wave and a busbar to which the plurality of electrode fingers are connected;
- wherein an anisotropic coefficient γ represented by kx2+γky2=k02 is equal to or more than 1.7, where kx is a wavenumber of the acoustic wave in an arrangement direction of the plurality of fingers, ky is a wavenumber of the acoustic wave in a longitudinal direction of the plurality of fingers, and k0 is a wavenumber of the acoustic wave in a direction inclined from the arrangement direction toward the longitudinal direction.
Dependencies are inferred from the claim text.