Patent ID: 11894828
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An acoustic wave device comprising:
a piezoelectric layer;
an interdigital transducer electrode on the piezoelectric layer;
silicon layers on opposing sides of the piezoelectric layer, the silicon layers including a first silicon layer and a second silicon layer; and
a silicon dioxide layer disposed between the first silicon layer and the piezoelectric layer, the acoustic wave device being configured to generate a boundary acoustic wave such that maximum displacement in an acoustic displacement distribution is centered at an interface of the piezoelectric layer and the silicon dioxide layer, the boundary acoustic wave having a wavelength of λ, the second silicon layer having a thickness sufficient to maintain mechanical durability of the acoustic wave device, the thickness of the second silicon layer being at least 10λ, and the acoustic wave device having a thickness in a range from 10 micrometers to 100 micrometers.