Patent ID: 11950511
Assignee: STMICROELECTRONICS S.R.L.
Field: Chemical engineering (Chemistry)
Classification: CPC H  B  G | IPC B  G  H

Claim 20:
21. A device, comprising:
a package including a base substrate, a cap coupled to the base substrate, and a chamber;
a semiconductor body on the base substrate and in the chamber, the semiconductor body having a first face and a second face opposite to the first face;
a cavity in the semiconductor body;
a membrane in the semiconductor body and directly overlying the cavity;
a first electrode on first face;
piezoelectric on the first electrode; and
a plurality of second electrodes on the piezoelectric and directly overlying the cavity, the membrane configured to vibrate at a resonance frequency in response to the first electrode and the plurality of second electrode being biased.