Patent ID: 11949399
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A method of fabricating an acoustic resonator device comprising:
bonding a piezoelectric layer attached to a sacrificial substrate to a substrate such that layers of an acoustic Bragg reflector are sandwiched between a first surface of the piezoelectric layer and a surface of the substrate;
removing the sacrificial substrate to expose a second surface of the piezoelectric layer; and
forming an interdigital transducer (IDT) at the piezoelectric plate,
wherein the acoustic Bragg reflector comprises alternating SiO2 and diamond layers and is configured to reflect a resonant frequency of the acoustic resonator device, and
wherein an electric field of the resonance frequency is predominantly lateral while a direction of acoustic energy flow of a primary shear acoustic mode of the acoustic resonator device is substantially orthogonal to the electric field.