Patent ID: 8210040

Claim:
An oscillating angular speed sensor comprising: a detector arranged on a face of a substrate, the detector having a detection fixed electrode supported by a part of the substrate, a detection movable electrode to oppose to the detection fixed electrode so as to be movable relative to the detection fixed electrode in a movable direction, and a detection beam that supports the detection movable electrode, a driving portion arranged on the face of the substrate, the driving portion driving the detector to oscillate in a drive direction approximately perpendicular to the movable direction, the driving portion including a driving movable electrode, a driving fixed electrode and a driving beam; and a separating portion fixed on the face of the substrate so as to be distanced from the detector and the driving portion, wherein the detection movable electrode is displaced by Coriolis force applied to the detector, when an angular speed is generated while the detector is oscillated, such that the angular speed is detected based on a capacitance variation generated in accordance with a variation of an interval between the detection movable electrode and the detection fixed electrode, and the separating portion is configured to separate a first space accommodating the detector and a second space accommodating the driving portion, the second space having a pressure lower than a pressure of the first space.