Patent ID: 11929731
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A filter device, comprising:
at least one piezoelectric layer having a plurality of portions that form one or more diaphragms; and
a conductor pattern at a surface of the at least one piezoelectric layer, the conductor pattern comprising a plurality of interdigital transducers (IDTs) each having interleaved fingers on the one or more diaphragms, respectively,
wherein a ratio of a mark of the interleaved fingers to a pitch of the interleaved fingers is greater than or equal to 0.12 and less than or equal to 0.3, and
wherein the pitch of the interleaved fingers is greater than or equal to 6 times a thickness of the at least one piezoelectric layer and less than or equal to 12.5 times the thickness of the at least one piezoelectric layer.