Patent ID: 11923821
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of fabricating an acoustic resonator device, comprising:
attaching a piezoelectric plate to a substrate;
forming a cavity such that a portion of the piezoelectric plate comprises a diaphragm spanning the cavity; and
forming a conductor pattern at the piezoelectric plate, the conductor pattern comprising an interdigital transducer (IDT);
wherein, after forming the diaphragm and forming the conductor pattern, interleaved parallel fingers of the IDT are at the diaphragm, and
wherein a width of either one of two adjacent parallel fingers is greater than or equal to 0.2 times a center-to-center spacing between the two adjacent parallel fingers and less than or equal to 0.3 times the center-to-center spacing between the two adjacent parallel fingers.