Patent ID: 11967945
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A radio frequency filter, comprising:
a plurality of acoustic resonators that each comprise:
a substrate;
a piezoelectric layer comprising a supported portion and a diaphragm, wherein a surface of the supported portion is attached directly or via one or more intermediate layers to a surface of the substrate and the diaphragm is over a cavity of the respective acoustic resonator; and
a conductor pattern at the piezoelectric layer, the conductor pattern comprising an interdigital transducer (IDT) that includes:
a first busbar and a second busbar, at least portions of both the first and second busbars being disposed on the supported portion of the piezoelectric layer, and
interleaved fingers extending alternately from the first and second busbars, overlapping portions of the interleaved fingers disposed on the respective diaphragm of the acoustic resonator.