Patent ID: 6490923
Filing Date: 2002-12-10
Classification: G01C

Abstract:
A micromechanical rotation rate sensor based on the Coriolis principle comprising, in combination:a) two plate-like oscillators arranged one above the other in two planes for excitation via an electrostatic drive to oscillate at right angles to said planes; b) said oscillators being suspended in the direction of a rotation axis on opposite side edges via, in each case, at least one narrow spring web between an associated plate-like support lying in the same plane via which signals are read out, and an associated drive plate element of the electrostatic drive also lying in the same plane; c) said two supports and said two drive plate elements in each case being spaced apart, one above the other, with a fixed plate element inserted therebetween in such a manner that a narrow drive gap to the two drive plate elements is defined in each case; and d) said drive gap is considerably smaller than the distance between said oscillators.