Acceleration sensor and method of fabricating it
US8047076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Jun 2, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49139
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is an acceleration sensor that has high detection sensitivity and that can enhance production efficiency. The acceleration sensor has: a ceramic substrate made of Al2O3; a ferroelectric layer formed in a predetermined area on the ceramic substrate by screen printing, the ferroelectric layer being made of BaTiO3; a proof mass disposed so as to face the ferroelectric layer, the proof mass being formed at a predetermined distance d from the ferroelectric layer; and a first electrode and a second electrode that are formed on that side of the proof mass which faces the ferroelectric layer, so as to be fixed thereto. The first electrode and the second electrode are each formed in the shape of comb teeth, and comb tooth portions and thereof are arranged in an alternating manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.