Patent ID: 11936364
Assignee: SOITEC
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A surface acoustic wave device, comprising:
a base substrate;
a piezoelectric layer;
an electrode layer in between the piezoelectric layer and the base substrate; and
a comb electrode formed on the piezoelectric layer comprising a plurality of electrode fingers with a pitch ρ, defined as ρ=λ, with λ being a wavelength of a standing acoustic wave generated by applying opposite potentials to the electrode layer and the comb electrode;
wherein, the piezoelectric layer comprises at least one region located in between the plurality of electrode fingers in which at least one physical parameter is different compared to a region underneath the plurality of electrode fingers; and
wherein the at least one physical parameter of the piezoelectric layer being different in the at least one region is one of elasticity of the piezoelectric layer and a dopant concentration.