Patent ID: 11909374
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;
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 in the substrate; and
an interdigital transducer (IDT) at a surface of the piezoelectric plate, the IDT including:
a first busbar and a second busbar disposed on respective portions of the piezoelectric plate other than the diaphragm,
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,

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.