Piezoelectric displacement element
US4649313A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1984 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Sep 19, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/204
Abstract
Disclosed herein is a piezoelectric displacement element utilizing a sintered body obtained by stacking three or more ceramic layers (5a to 5h) through internal electrodes (6b to 6h) and co-firing the same. The sintered body has first, second and third regions when viewed in the direction of thickness. The first and third regions are so formed as to be displaced in reverse directions to each other. The second region consists of a plurality of piezoelectric ceramic layers (5d, 5e) in such a manner that an internal electrode (6e) interposed between the piezoelectric ceramic layers (5d, 5e) is connected with neither potentials in a driven state, whereby the second region is adapted not to be positively driven, to function as a buffer area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.