Patent ID: 7302847

Claim:
An angular rate sensor comprising: a support substrate; a semiconductor layer supported on the support substrate; and a movable portion disposed in the semiconductor layer, wherein the movable portion is movably supported on the support substrate, the movable portion includes a driving vibration portion and a detecting vibration portion, the driving vibration portion is capable of vibrating in a first direction, the detecting vibration portion is capable of vibrating in a second direction by angular velocity applied to the sensor, the second direction is perpendicular to the first direction, the driving vibration portion includes a plurality of through holes, which penetrate in a thickness direction of the semiconductor layer, the detecting vibration portion includes a plurality of through holes, which penetrate in the thickness direction of the semiconductor layer, each through hole of the driving vibration portion has an elongated shape extending in the first direction, and each through hole of the detecting vibration portion has an elongated shape extending in the second direction.