Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-03-07
2006-03-07
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S328000, C310S330000, C310S332000, C310S366000, C347S068000, C347S071000, C347S070000
Reexamination Certificate
active
07009327
ABSTRACT:
First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric material layer therebetween. The first internal electrode layers are exposed to a first end face of the substrate, and the second internal electrode layers are exposed to a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. A second external electrode layer is formed on the second end face and the third end face. The second external electrode layer is electrically independent from the first external electrode layer. The first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction. The second external electrode layer includes a pair of first sections provided on both end portions of the third end face in the first direction, and having a first dimension in a second direction perpendicular to the first direction, and a second section provided between the first sections, and having a second dimension in the second direction which is less than the first dimension.
REFERENCES:
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patent: 6747396 (2004-06-01), Blom
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Kanaya Munehide
Kitahara Tsuyoshi
Okazawa Noriaki
Aguirrechea J.
Schuberg Darren
Seiko Epson Corporation
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