Invention Grant
- Patent Title: Laminated piezoelectric element and process for producing the same
- Patent Title (中): 层叠压电元件及其制造方法
-
Application No.: US12131371Application Date: 2008-06-02
-
Publication No.: US07667377B2Publication Date: 2010-02-23
- Inventor: Atsushi Yamamoto , Yoichi Deguchi , Koichi Hayashi
- Applicant: Atsushi Yamamoto , Yoichi Deguchi , Koichi Hayashi
- Applicant Address: JP Kyoto-fu
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Kyoto-fu
- Agency: Dickstein Shaprio LLP
- Priority: JP2005-354332 20051208
- Main IPC: H01L41/08
- IPC: H01L41/08

Abstract:
A multilayer piezoelectric device including a body having internal electrode layers and piezoelectric ceramic layers alternately stacked. The internal electrode layers contain Cu as a major component, the piezoelectric ceramic layers contain a compound oxide represented by Pb(Ti, Zr)O3 as a major component, and a metal oxide (Nb2O5, Sb2O5, Ta2O5, or WO3) containing Nb, Sb, Ta, or W, which is at least one of a pentavalent metal element and a hexavalent metal element, is incorporated in the piezoelectric ceramic layers such that the concentration of the metal oxide decreases with distance from the internal electrode layers. Thereby, even in a case where internal electrodes contain Cu as a major component, it is possible to provide a multilayer piezoelectric device which can be obtained by low-temperature firing while ensuring a sufficient piezoelectric constant.
Public/Granted literature
- US20080231147A1 LAMINATED PIEZOELECTRIC ELEMENT AND PROCESS FOR PRODUCING THE SAME Public/Granted day:2008-09-25
Information query
IPC分类: