Patent ID: 11940345
Assignee: ROBERT BOSCH GMBH
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A micromechanical component for a capacitive pressure sensor device, the micromechanical component comprising:
a substrate;
a frame structure that frames a partial surface of the substrate and/or of at least one intermediate layer on the substrate;
a membrane that is tensioned by the frame structure in such a way that a self-supporting region of the membrane extends over the framed partial surface, with an internal volume between the membrane and the framed partial surface;
at least one first connector protruding from a radially interior region of the membrane towards the framed partial surface;
a counter-electrode in the internal volume and attached to the membrane via the at least one first connector;
a measurement electrode that is situated on the framed partial surface;
a reference counter-electrode;
a reference measurement electrode that is situated on the framed partial surface and is electrically insulated from the measurement electrode; and
a second connector protruding from a radially exterior region of the membrane towards the substrate;
wherein:
the internal volume is enclosed by the frame structure and is air-tightly sealed with a reference pressure therein;
the self-supporting region of the membrane is deformable by a physical pressure that is applied on an external side of the self-supporting region, oriented away from the internal volume, when the physical pressure is unequal to the reference pressure;
the reference counter-electrode is connected to the membrane by attachment of a radially exterior half of the reference counter-electrode to the second connector; and
a radially interior half of the reference counter-electrode is free from the membrane.