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

Claim 5:
6. 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 rigid electrode structure, a first deflectable membrane structure and a second deflectable membrane structure in a vertically spaced configuration, wherein the rigid electrode structure is sandwiched between the first deflectable membrane structure and the second deflectable membrane structure, and
wherein the first deflectable membrane structure of the first MEMS pressure sensing portion comprises a deflectable portion and the second deflectable membrane structure of the first MEMS pressure sensing portion comprises a deflectable portion, and wherein the deflectable portions of the first and second deflectable membrane structures of the first MEMS pressure sensing portion are mechanically coupled to each other and are mechanically decoupled from the rigid electrode structure,
wherein the first deflectable membrane structure of the second MEMS pressure sensing portion comprises a deflectable portion and the second deflectable membrane structure of the second MEMS pressure sensing portion comprises a deflectable portion, and wherein the deflectable portions of the first and second deflectable membrane structures of the second MEMS pressure sensing portion are mechanically coupled to each other and are mechanically decoupled from the rigid electrode structure,
wherein the first deflectable membrane structure and the rigid electrode structure of the first MEMS pressure sensing portion form a first sensing capacitor, wherein the rigid electrode structure and the second deflectable membrane structure of the first MEMS pressure sensing portion form a second sensing capacitor,
wherein the first deflectable membrane structure and the rigid electrode structure of the second MEMS pressure sensing portion form a third sensing capacitor, wherein the rigid electrode structure and the second deflectable membrane structure of the second MEMS pressure sensing portion form a fourth sensing capacitor, and
wherein the rigid electrode structure and the second deflectable membrane of the first MEMS pressure sensing portion and the rigid electrode structure and the second deflectable membrane of the second MEMS pressure sensing portion are enclosed in respective sealed cavities.