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

Claim 6:
7. A filter device comprising:
a substrate having a surface;
a plurality of acoustic resonators that each include:
a piezoelectric layer, and
a conductor pattern at a surface of the piezoelectric layer, the conductor pattern including an IDT,

an acoustic Bragg reflector sandwiched between the surface of the substrate and the piezoelectric layer of each of the plurality of acoustic resonators, the acoustic Bragg reflector configured to reflect a resonance frequency of the respective plurality of acoustic resonators,
wherein an electric field of the resonance frequency of the plurality of acoustic resonators is predominantly lateral while a direction of acoustic energy flow of a primary shear acoustic mode of the plurality of acoustic resonators is substantially orthogonal to the electric field.