Patent ID: 11885705
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A capacitive pressure sensor arrangement comprising:
a first MEMS pressure sensing portion and a second MEMS pressure sensing portion on a substrate, each comprising:
a first rigid electrode fixed with respect to the substrate, a second rigid electrode, and a deflectable membrane structure, wherein the second rigid electrode is sandwiched between the first rigid electrode and the deflectable membrane structure, and wherein the first rigid electrode, the second rigid electrode and the deflectable membrane structure are arranged in a vertically spaced configuration, and
wherein the first and second rigid electrode of the first MEMS pressure sensing portion form a reference capacitor of the first MEMS pressure sensing portion, and wherein the second rigid electrode and the deflectable membrane structure of the first MEMS pressure sensing portion form a sensing capacitor of the first MEMS pressure sensing portion, and
wherein the first and second rigid electrode of the second MEMS pressure sensing portion form a reference capacitor of the second MEMS pressure sensing portion, and wherein the second rigid electrode and the deflectable membrane structure of the second MEMS pressure sensing portion form a sensing capacitor of the second MEMS pressure sensing portion.