Patent ID: 11949402
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. An acoustic resonator comprising:
a back surface of a first piezoelectric plate bonded to a top surface of a substrate having at least a first cavity and a second cavity;
a planarized top surface of the first piezoelectric plate forming a first thickness of the first piezoelectric plate;
the first piezoelectric plate spanning the first cavity and the second cavity;
a bonding layer bonded on a top surface of the first piezoelectric plate;
the bonding layer spanning the first cavity and the second cavity;
a back surface of a second piezoelectric plate bonded to a top surface of the bonding layer;
the second piezoelectric plate spanning the first cavity; and
a planarized top surface of the second piezoelectric plate forming a second thickness of the second piezoelectric plate;
wherein the second thickness is less than the first thickness.