Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2011-06-28
2011-06-28
SanMartin, J. (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C600S459000, C310S365000
Reexamination Certificate
active
07969068
ABSTRACT:
An ultrasonic transducer has a rectangular piezo-electric ceramic sheet piece2which has a retracted portion1on a side face, an upper electrode layer3placed on an upper surface of the ceramic sheet piece,4a first terminal electrode that is placed on the upper surface of the ceramic sheet piece and connected to the upper electrode layer3, a lower electrode layer5placed on the lower surface of the ceramic sheet piece, an electro-conductive layer6that is placed on the retracted side face1and connected to the lower electrode layer5, a second terminal electrode7that is placed on the upper surface of the ceramic sheet piece and is connected to the electro-conductive layer6, a first lead wire9aconnected to the first terminal electrode, a second lead wire9bconnected to the second terminal electrode7, an acoustic matching layer10placed on the upper electrode layer, and an acoustic absorbing layer11placed on the surface of the lower electrode layer.
REFERENCES:
patent: 4385255 (1983-05-01), Yamaguchi et al.
patent: 5122993 (1992-06-01), Hikita et al.
patent: 5855049 (1999-01-01), Corbett et al.
patent: 6558332 (2003-05-01), Shimizu
patent: 6744178 (2004-06-01), Muramatsu et al.
Yagami Hiroyuki
Yokobori Yoichi
Buchanan & Ingersoll & Rooney PC
SanMartin J.
Terumo Kabushiki Kaisha
Ueda Japan Radio Co., Ltd.
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