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

Claim 12:
13. 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; and
a first conductor level at a surface of the piezoelectric plate, the first conductor level including:
first and second busbars;
a first set of elongated fingers extending from the first bus bar,
a second set of elongated fingers extending from the second bus bar, the second set of elongated fingers interleaved with the first set of elongated fingers,

wherein the first and second busbars are not on the diaphragm,
wherein the first and second sets of elongated fingers extend from the respective busbars onto the diaphragm, and
wherein the piezoelectric plate and the first and second sets of elongated fingers are configured such that a radio frequency signal applied between the first and second busbars excites a primary shear acoustic mode in the diaphragm.