Patent ID: 11909374
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An acoustic resonator device comprising:
a substrate;
a single-crystal piezoelectric plate attached directly or by one or more intermediate layers to the substrate and having a portion that forms a diaphragm spanning a cavity;
first and second busbars on a surface of the piezoelectric plate;
a first set of elongated fingers extending from the first bus bar onto the diaphragm,
a second set of elongated fingers extending from the second bus bar onto the diaphragm, the second set of elongated fingers interleaved with the first set of elongated fingers;
a first set of dummy fingers extending from the first busbar onto the diaphragm, each of the first set of dummy fingers aligned with a corresponding one of the second set of elongated fingers; and
a second set of dummy fingers extending from the second busbar onto the diaphragm, each of the second set of dummy fingers aligned with a corresponding one of the first set of elongated fingers,
wherein an entirety of first bus bar and an entirety of second bus bar are not on the diaphragm.