Invention Grant
- Patent Title: Multi-layer piezoelectric element
- Patent Title (中): 多层压电元件
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Application No.: US10573339Application Date: 2004-09-22
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Publication No.: US07679272B2Publication Date: 2010-03-16
- Inventor: Takeshi Okamura , Katsushi Sakaue , Mitsuo Kondo
- Applicant: Takeshi Okamura , Katsushi Sakaue , Mitsuo Kondo
- Applicant Address: JP Kyoto
- Assignee: Kyocera Corporation
- Current Assignee: Kyocera Corporation
- Current Assignee Address: JP Kyoto
- Agency: Hogan & Hartson LLP
- Priority: JP2003-333112 20030925; JP2003-388420 20031118; JP2003-420167 20031217
- International Application: PCT/JP2004/013796 WO 20040922
- International Announcement: WO2005/031887 WO 20050407
- Main IPC: H01L41/08
- IPC: H01L41/08

Abstract:
To provide a multi-layer piezoelectric device having excellent durability in which the amount of displacement does not change even when the piezoelectric actuator is subjected to continuous operation over a long period of time under a high voltage and a high pressure, the multi-layer piezoelectric device comprises a stack formed by stacking piezoelectric layers and internal electrodes alternately one on another and external electrodes formed on a first side face and on a second side face of the stack, wherein one of the adjacent internal electrodes is connected to the external electrode formed on the first side face and the other internal electrode is connected to the external electrode formed on the second side face, while content of alkali metal in a range from 5 ppm to 300 ppm is contained.
Public/Granted literature
- US20070205700A1 Multi-Layer Piezoeletric Element Public/Granted day:2007-09-06
Information query
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