Patent ID: 7540191

Claim:
An angular rate sensor comprising: a first structure which includes a fixed portion having an opening, a displacing portion placed in the opening and configured to be displaced relative to the fixed portion, and a connecting portion adapted to connect the fixed portion and the displacing portion, and is formed of a substrate composed of a first semiconductor material; a second structure which includes a weighting portion respectively joined to the displacing portion, and a pedestal portion arranged to surround the weighting portion and joined to the fixed portion, and is laminated in place on the first structure and composed of a second semiconductor material; a first substrate laminated on the first structure; a second substrate laminated on the second structure; a vibration imparting portion adapted to impart vibration to the displacing portion of the first structure; and a displacement detecting portion adapted to detect displacement of the displacing portion; wherein: the first substrate, the fixed portion, the pedestal portion, and the second substrate form a sealed body together such that the displacing portion and the weighting portion can be moved in the sealed body; the first substrate includes a first metal layer and a first insulating layer laminated on the first metal layer, the first insulating layer including a first recess, and being connected to the fixed portion; and the second substrate includes a second metal layer and a second insulating layer laminated on the second metal layer, the second insulating layer including a second recess, and being connected to the pedestal portion.