Patent ID: 11955952
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A filter device, comprising:
a first chip comprising:
a first piezoelectric plate having front and back surfaces and a first thickness;
a first acoustic Bragg reflector sandwiched between the back surface of the first piezoelectric plate and a surface of a first base; and
a first conductor pattern on the front surface of the first piezoelectric plate, the first conductor pattern including a plurality of interdigital transducers (IDTs) of a respective plurality of first resonators;

a second chip comprising:
a second piezoelectric plate having front and back surfaces and a second thickness less than the first thickness;
a second acoustic Bragg reflector sandwiched between the back surface of the second piezoelectric plate and a surface of a second base; and
a second conductor pattern on the front surface of the second piezoelectric plate, the second conductor pattern including a plurality of IDTs of a respective plurality of second resonators; and

a circuit card coupled to the first chip and the second chip, the circuit card comprising at least one conductor for making an electrical connection between one of the one or more first acoustic resonators and one of the one or more second acoustic resonators.