Patent ID: 8899112

Claim:
A gyro sensor, comprising: a driving mass driven in a first direction by a driving unit; a detection mass connected with the driving mass; a driving connection, one end and another end of which are connected with the driving mass and a first anchor, respectively; a first island connected with the first anchor, and disposed with a clearance left between the first island and the driving mass in such a manner as to be electrically connected with the driving mass; and a projection provided at least either on a surface of the driving mass opposed to the first island, or on a surface of the first island opposed to the driving mass, wherein the driving unit includes a movable electrode unit connected with the driving mass, and a fixed electrode unit disposed opposed to the movable electrode unit, and a minimum distance between the driving mass and the first island is longer than a driving amplitude of the driving mass and shorter than a maximum amplitude of the movable electrode unit.