Patent ID: 11912563
Assignee: ROBERT BOSCH GMBH
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 8:
9. A capacitive pressure sensor device, comprising:
a micromechanical component, including:
a substrate having an upper substrate surface;
a diaphragm, which spans a cavity lying between the diaphragm and the upper substrate surface, so as to be spaced apart from a bottom side of the cavity pointed away from the diaphragm; and
a plurality of support structures, which each extend from an inner diaphragm side of the diaphragm to the bottom side of the cavity and/or from the inner diaphragm side to a measuring electrode suspended on the diaphragm;
wherein each support structure of the support structures includes, in each instance, a first edge element structure, a second edge element structure, and at least one intermediate element structure positioned between the first edge element structure of the support structure and the second edge element structure of the support structure; for each respective support structure of the support structures, in each instance, a respective plane of symmetry is definable, with respect to which at least the first edge element structure of the respective support structure and the second edge element structure of the respective support structure are specularly symmetric; and in each respective support structure of the support structures, a first maximum dimension of the first edge element structure of the respective support structure perpendicular to the respective plane of symmetry of the respective support structure and a second maximum dimension of the second edge element structure of the respective support structure perpendicular to the respective plane of symmetry of the respective support structure are greater than a respective at least one maximum dimension of the at least one intermediate element structure of the respective support structure perpendicular to the respective plane of symmetry of the respective support structure,
wherein the cavity is sealed so air-tightly to have a reference pressure present in the cavity, that the diaphragm may be deformed at least partially with the aid of a physical pressure unequal to the reference pressure, on an outer diaphragm side of the diaphragm pointed away from the cavity; and a counter-electrode situated on the bottom side of the cavity, and the measuring electrode, are electrically contactable in such a manner, that a voltage applied between the counter-electrode and the measuring electrode may be tapped off; and

evaluation electronics, which are configured to determine and output a measured value regarding the physical pressure prevailing, in each instance, on the outer diaphragm side, in view of at least the voltage tapped off between the counter-electrode and the measuring electrode.