Patent ID: 7260991
Filing Date: 2007-08-28
Classification: G01C

Abstract:
1. A micromechanical rotation-rate sensor comprising: a substrate; an anchoring device provided on the substrate; a first spiral spring device and a second spiral spring device, wherein the two spiral spring devices are provided next to one another in mirror symmetry along their greatest extension, and wherein the two spiral spring devices together form one spiral spring apparatus; and a centrifugal mass connected to the anchoring device via the first and second spiral spring devices connected to the centrifugal mass so that the centrifugal mass is elastically deflectable from its neutral position, about a rotational axis situated perpendicularly to a substrate surface and so that it is capable of rotary oscillation; wherein the first spiral spring device includes a first bend at its anchoring region with the anchoring device, the second spiral spring device includes a second bend at its anchoring region with the anchoring device, the first bend bending away from the first and second spiral spring devices towards a first portion of the anchoring region, the second bend bending away from the first and second spiral spring devices towards a second portion of the anchoring region.