| 摘要 |
An acceleration detector includes: a plate-like flexible portion which has piezoelectricity and can flex by an inertial force (base portion, joint portion, moving portion); an acceleration detection element loaded on a main surface of the base portion and the moving portion; an electrically conductive mass portion loaded on the moving portion; and a package accommodating the base portion, the joint portion, the moving portion, the acceleration detection element and the mass portion. The acceleration detection element is provided with wirings through which detected acceleration is taken out as an electrical signal, and the mass portion can be maintained at a desired electric potential.
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