Patent ID: 11889283
Assignee: INFINEON TECHNOLOGIES AG
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 11:
12. A triple-membrane MEMS device comprising:
a first membrane, a second membrane and a third membrane spaced apart from one another, wherein the second membrane is between the first membrane and the third membrane, and the second membrane comprises a plurality of openings;
a sealed low pressure chamber between the first membrane and the third membrane;
a plurality of electrodes in the sealed low pressure chamber; and
at least one pillar in the sealed low pressure chamber, the at least one pillar being mechanically coupled to the first membrane, the second membrane and the third membrane, wherein the at least one pillar comprises a non-conductive portion coupled between the first membrane and the second membrane, and a conductive portion coupled between the second membrane and the third membrane, and wherein the first membrane is isolated from the second membrane, and the second membrane is electrically coupled to the third membrane.