Invention Grant
- Patent Title: Laminated piezoelectric element, jetting device provided with the laminated piezoelectric element and fuel jetting system
- Patent Title (中): 叠层压电元件,设置有层叠压电元件和燃料喷射系统的喷射装置
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Application No.: US12516793Application Date: 2007-11-29
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Publication No.: US08049397B2Publication Date: 2011-11-01
- Inventor: Takeshi Kato
- Applicant: Takeshi Kato
- Applicant Address: JP Kyoto
- Assignee: Kyocera Corporation
- Current Assignee: Kyocera Corporation
- Current Assignee Address: JP Kyoto
- Agency: Procopio, Cory, Hargreaves & Savitch LLP
- Priority: JP2006-320969 20061129
- International Application: PCT/JP2007/073021 WO 20071129
- International Announcement: WO2008/066098 WO 20080605
- Main IPC: H01L41/083
- IPC: H01L41/083

Abstract:
There are some cases where cracks occur at a plurality of areas on an external electrode when a displacement quantity of a laminated piezoelectric element is large. In such cases, there is a possibility of a voltage not being applied to a portion of the laminated structure due to the cracks caused by a long time drive to cause a reduction in the displacement quantity. A low rigidity layer is arranged on the laminated structure to form a plurality of portions divided by the low rigidity layer in a laminating direction. Each portion is provided with power feeding members on the anode side and the cathode side. Thus, a voltage can be stably supplied to each internal electrode.
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Information query
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