Laminated piezoelectric element
US5389851A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1993 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Aug 19, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/50
Abstract
A laminated piezoelectric element which includes a laminate of piezoelectric ceramic plates and inner electrodes. The piezoelectric ceramic plates are laminated alternately together with the inner electrodes. The laminate is cut so as to have a peripheral surface. A positive outer electrode is connected to one group of inner electrodes at a peripheral surface of the laminate, and a negative outer electrode is connected to another group of inner electrodes at the peripheral surface of the laminate. A coating of fine ceramic particles is applied to, or a ceramic layer is sputtered on, the peripheral surface of the piezoelectric ceramic plates so that the insulation between adjacent inner electrodes is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.