Patent ID: 9255801
Filing Date: 2016-02-09
CPC Classification: G01C

Claim Text:
1. A yaw rate sensor, comprising: a substrate, which has a main extension plane, for detecting a yaw rate around a first direction extending in parallel to the main extension plane; a drive device; a first Coriolis mass; a second Coriolis mass, the drive device being configured to drive the first Coriolis mass and the second Coriolis mass in parallel to a drive direction, which extends perpendicularly to the first direction, the first Coriolis mass and the second Coriolis mass, in the case of a yaw rate around the first direction, experiencing a Coriolis acceleration in parallel to a detection direction, which extends perpendicularly to both the drive direction and perpendicularly to the first direction, the yaw rate sensor having an axis of symmetry which extends in parallel to the first direction with respect to the Coriolis masses, wherein the first Coriolis mass has a first partial area and a second partial area, the second Coriolis mass has a third partial area and a fourth partial area, the first partial area and the third partial area being situated farther away from the axis of symmetry extending in parallel to the first direction, and the second partial area and the fourth partial area being situated closer to the axis of symmetry extending in parallel to the first direction; a first electrode, which forms a first capacitance with the first partial area, is situated opposite to the first partial area; a second electrode, which forms a second capacitance with the second partial area, is situated opposite to the second partial area; a third electrode, which forms a third capacitance with the third partial area, is situated opposite to the third partial area; a fourth electrode, which forms a fourth capacitance with the fourth partial area, is situated opposite to the fourth partial; wherein an attachment of the first Coriolis mass and the second Coriolis mass is on the substrate or on the drive device, wherein the configurations of the first, second, third, and fourth electrodes are provided so that for a rotational acceleration around the first direction, the changes, which are caused by the deflections of or force effects on the first, second, third, and fourth partial areas are in parallel to the detection direction, of either the first and third capacitances and the second and fourth capacitances or the first and second capacitances and the third and fourth capacitances mutually compensate for one another, wherein the first partial area and the second partial area have different masses per unit area in parallel to the main extension plane of the first Coriolis mass, and the third partial area and the fourth partial area have different masses per unit area in parallel to the main extension plane of the second Coriolis mass.