Patent ID: 11881834
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An acoustic filter device comprising:
a substrate;
a piezoelectric plate having front and back surfaces, the back surface attached to the substrate, portions of the piezoelectric plate forming a plurality of diaphragms spanning respective cavities in the substrate; and
a conductor pattern at the piezoelectric plate and including a plurality of interdigital transducers (IDTs) of a plurality of acoustic resonators, respectively, with interleaved fingers of each IDT at a respective diaphragm of the plurality of diaphragms,
wherein, for one or more of the plurality of IDTs, a ratio of the mark of the interleaved fingers to the pitch of the interleaved fingers is greater than or equal to 0.2 and less than or equal to 0.3.