Patent ID: 8573058
Filing Date: 2013-11-05
Classification: B81B,G01P

Abstract:
1. An acceleration sensor comprising: a support member; a fixed electrode extending from a first base of the support member in a first direction, the fixed electrode being in the form of an arm; a movable unit; a movable electrode extending from a second base of the movable unit in a second direction opposite to the first direction and disposed opposite to the fixed electrode across a gap, the movable electrode being in the form of an arm; an elastically deformable connection member connecting the support member and the movable unit; the fixed electrode has an opposite surface opposite to the movable electrode; and a projection formed at the opposite surface of the fixed electrode, wherein a first tip of the fixed electrode is adjacent to the movable unit, the projection is continuously formed from the first base to the first tip in the first direction, the projection is projected from the opposite surface toward the movable electrode, and a first width of the fixed electrode where the projection is formed, in a width direction perpendicular to the first direction is larger than a second width of the fixed electrode, where the projection is not formed, in the width direction.