Patent ID: 11870423
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An acoustic resonator device comprising:
a substrate having a surface;
a lithium niobate (LN) plate having front and back surfaces, the back surface attached to the surface of the substrate except for a portion of the LN plate forming a diaphragm that spans a cavity in the substrate;
an interdigital transducer (IDT) formed on the front surface of the LN plate such that interleaved fingers of the IDT are disposed on the diaphragm, the LN plate and the IDT configured such that a radio frequency signal applied to the IDT excites a shear primary acoustic mode in the diaphragm; and
a half-lambda dielectric layer formed on one of the front surface and the back surface of the diaphragm, wherein
Euler angles of the LN plate are [0°, β, 0°], where 20°≤β≤25°.