Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-06-02
2010-02-23
Budd, Mark (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C252S06290R
Reexamination Certificate
active
07667377
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)O3as 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.
REFERENCES:
patent: 4816239 (1989-03-01), Wada et al.
patent: 7344654 (2008-03-01), Ogiso et al.
patent: 7498725 (2009-03-01), Iezumi et al.
patent: 7528531 (2009-05-01), Iezumi et al.
patent: 7531947 (2009-05-01), Shindo et al.
patent: 2002/0098333 (2002-07-01), Feltz et al.
patent: 2005/0212388 (2005-09-01), Nanao et al.
patent: 2008/0074004 (2008-03-01), Yamamoto et al.
patent: 7-257924 (1995-10-01), None
patent: 2000-169223 (2000-06-01), None
patent: 2001-089237 (2001-04-01), None
patent: 2001-250994 (2001-09-01), None
patent: 2002-261343 (2002-09-01), None
patent: 2004-336981 (2004-11-01), None
patent: 2005-85937 (2005-03-01), None
patent: 2005-212388 (2005-08-01), None
patent: 2006-96626 (2006-04-01), None
patent: 2006-156586 (2006-06-01), None
patent: WO-2005-071769 (2005-08-01), None
PCT/JP2005/000655 International Search Report dated Mar. 1, 2005.
Deguchi Yoichi
Hayashi Koichi
Yamamoto Atsushi
Budd Mark
Dickstein Shaprio LLP
Murata Manufacturing Co. Ltd.
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