Piezoelectric element and injector using the same
US6845920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2002 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Jun 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/503
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric element and an injector using the same piezoelectric element are disclosed, which are so high in reliability as not to be shorted even in a high humidity environment, are small in size, are low in cost and are high in heat radiation capability. The piezoelectric element comprises a ceramic laminate (10) including a plurality of ceramic layers of a piezoelectric ceramic (11) and a plurality of internal electrode layers (21, 22), stacked alternately. At least an organic insulating layer (41) of an organic material is formed on at least a part of the surface of the ceramic laminate (10), and at least an inorganic insulating layer (42) of an inorganic material is formed on the organic insulating layer (41).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.