Patent ID: 11949402
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A filter system comprising:
a substrate wafer having at least a first cavity and a second cavity on a single die;
a first piezoelectric plate wafer spanning the first cavity and the second cavity;
a bonding layer spanning the first piezoelectric plate wafer;
a second piezoelectric plate wafer spanning the first cavity but not the second cavity,
a first interdigital transducer (IDT) on a front surface of the first piezoelectric plate wafer over the first cavity; and
a second IDT on a front surface of the bonding layer over the second cavity;
wherein the first piezoelectric plate wafer and the second piezoelectric plate wafer have different thicknesses.