Patent ID: 9052334
Filing Date: 2015-06-09
Classification: G01P

Abstract:
1. An acceleration sensor, comprising: a sensor unit including a weight portion, a pair of beam portions configured to rotatably support the weight portion, a movable electrode provided on a surface of the weight portion, and a fixed electrode; a fixed plate arranged in a spaced-apart relationship with the surface of the weight portion on which the movable electrode is provided, the fixed electrode being arranged on one of two opposite surfaces of the fixed plate which faces the movable electrode; and an embedment electrode having end portions, the embedment electrode embedded in the fixed plate in a way such that the embedment electrode extends through the fixed plate along a thickness direction of the fixed plate so that one of the end portions is arranged on said one of the surfaces of the fixed plate and the other of the end portions is configured to serve as a detection electrode on the other of the surfaces of the fixed plate, wherein the fixed electrode is connected to said one of the end portions of the embedment electrode by an extension portion provided therebetween such that the embedment electrode is arranged out of alignment with the weight portion.