Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-02-14
2006-02-14
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S364000, C347S070000, C347S071000, C347S068000
Reexamination Certificate
active
06998764
ABSTRACT:
In a piezoelectric layer of a multilayer piezoelectric element, a portion held between an electrode portion of an individual electrode and a common electrode becomes an active portion. When a voltage is applied between the individual electrode and common electrode, the active portion is displaced. The individual inner electrode includes a connection portion connected to the conductive substance within a through hole of the piezoelectric layer. The connection portion is formed at a position shifted from the longitudinal centerline of the electrode portion. This can restrain the displacement of the electrode portion following the active portion of the piezoelectric layer from being suppressed by the connection with the conductive substance as compared with a case where the connection portion is formed on the centerline of the electrode portion. Therefore, the amount of displacement of the active portion in the piezoelectric layer can be prevented from decreasing.
REFERENCES:
patent: 6601949 (2003-08-01), Kitahara
patent: 2004/0130604 (2004-07-01), Watanabe et al.
patent: 2005/0179747 (2005-08-01), Iamai et al.
patent: A 2002-36544 (2002-02-01), None
patent: A 2002-254634 (2002-09-01), None
patent: A 2002-254657 (2002-09-01), None
Sasaki Satoshi
Tachimoto Kazushi
Aguirrechea J.
Schuberg Darren
TDK Corporation
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