Patent ID: 7322241

Claim:
An acceleration sensor comprising: a mass; a supporting member surrounding the mass; a beam flexibly linking the mass to the supporting member, the beam being joined to the supporting member at a first boundary and to the mass at a second boundary; a first continuous low-resistance area formed in at least one of the mass, the supporting member, and the beam at one of the first boundary and the second boundary; a dielectric film at least partly covering the mass, the supporting member, and the beam, having a plurality of first contact holes disposed over the first continuous low-resistance area; wiring formed on the supporting member and in the first contact holes, making electrical contact with the first continuous low-resistance area; and a first strain detector formed within at least one of the mass, the supporting member, and the beam, the strain detector including the first continuous low-resistance area, wherein the first strain detector has a first end and a second end, the first continuous low-resistance area being disposed at the first end, the first strain detector also includes a second continuous low-resistance area disposed at the second end, the dielectric film also has a second contact hole disposed over the second continuous low-resistance area, and the wiring is also formed in the second contact hole and also makes electrical contact with the second continuous low-resistance area.