Patent ID: 11929727
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An acoustic filter device comprising:
at least one piezoelectric plate, portions of the piezoelectric plate forming a plurality of diaphragms; and
a conductor pattern at the at least one piezoelectric plate, the conductor pattern comprising interdigital transducers (IDTs) of a plurality of acoustic resonators with each IDT having interleaved parallel fingers at a respective diaphragm of the plurality of diaphragms,
wherein, for one or more of the IDTs, a pitch of the parallel fingers is greater than or equal to 2.5 times a thickness of the respective diaphragm and less than or equal to 15 times the thickness of the respective diaphragm.