Ultrasonic transducer and method of manufacturing the same

Details Ultrasonic transducer and method of manufacturing the same Ultrasonic transducer and method of manufacturing the same

2006-02-07

2006-02-07

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S334000

Reexamination Certificate

active

06995501

ABSTRACT:
Materials having different compositions are arranged to prepare a molded form in which the sound velocity characteristic is varied from high frequency to low frequency from the center toward the periphery. An ultrasonic wave-radiating face of the molded form and the back face of the ultrasonic wave-radiating face are arranged in parallel to each other to prepare a transducer in which the center region can transmit/receive high-frequency ultrasonic waves and the periphery region can transmit/receive low-frequency ultrasonic waves.

REFERENCES:
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patent: 4961176 (1990-10-01), Tanaka et al.
patent: 5461274 (1995-10-01), Yuji et al.
patent: 6791240 (2004-09-01), Mauchamp et al.
patent: 59-197349 (1984-08-01), None
patent: 3-214678 (1991-09-01), None
patent: 2001-137238 (2001-05-01), None

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