Ultrasonic transducer and method of manufacturing ultrasonic...

Details Ultrasonic transducer and method of manufacturing ultrasonic... Ultrasonic transducer and method of manufacturing ultrasonic...

2007-05-29

2007-05-29

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Charge accumulating

Reexamination Certificate

active

11136310

ABSTRACT:
The present invention relates to an ultrasonic transducer that has a diaphragm in which an electrode layer is formed thereon. A fixed electrode having a plurality of asperities on the surface facing the diaphragm is provided. An alternating current signal is applied between the electrode layer formed on the diaphragm and the fixed electrode to generate ultrasonic waves. A groove is formed on the upper surface of the projections of the asperities of the fixed electrode to prevent the diaphragm from sticking to the fixed electrode.

REFERENCES:
patent: 4887248 (1989-12-01), Griebeler
patent: 6265806 (2001-07-01), Suzuki
patent: 2004/0066113 (2004-04-01), Kasahara et al.
patent: 2004/0212275 (2004-10-01), Koga et al.
patent: 56-042493 (1981-04-01), None
patent: 58-046800 (1983-03-01), None
patent: 2000-050392 (2000-02-01), None
patent: 2003-18696 (2003-01-01), None
Communication from Korean Patent Office regarding related application.

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