Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1991-02-11
1992-10-06
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310365, 310366, H01L 4108
Patent
active
051534770
ABSTRACT:
A laminated displacement device comprises: a laminate which is formed by alternately laminating thin plates made of an electromechanical converting material and internal electrodes made of a conductive material; and external electrodes which are provided in the side portions of the laminate and are connected to the internal electrodes. In the laminated displacement device, a plane projection area which is obtained by overlapping the internal electrodes in the laminating direction is set to be smaller than a plane projection area which is obtained by overlapping the thin plates in the laminating direction. A relation of B/A.gtoreq.0.5 is satisfied between the width dimension A of a displacement portion which is formed by overlapping the projections of the internal electrodes in the laminating direction and the width dimension B of a non-displacement portion which is formed between the edge of the displacement portion and the side surface of the laminate.
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Jomura Shigeru
Someji Takahiro
Watanabe Jun-ichi
Watanabe Yoshiyuki
Budd Mark O.
Hitachi Metals Ltd.
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