Patent ID: 11921074
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A gas sensitive device, comprising:
a substrate structure; and
a gas sensitive capacitor, the gas sensitive capacitor comprising:
a first capacitor electrode in form of a gas sensitive layer on a first main surface region of an insulation layer,
a second capacitor electrode in form of a buried conductive region below the insulation layer, wherein:
the insulation layer is arranged between the first and second capacitor electrode, and
the gas sensitive layer comprises a sheet impedance that changes in response to adsorption or desorption of gas molecules, and

a cover layer disposed on top of the insulation layer, wherein the cover layer has at least one common plane with the first capacitor electrode, the cover layer surrounds the first capacitor electrode in the at least one common plane leaving the entire first capacitor electrode uncovered by the cover layer.