Ultrasonic probe

Details Ultrasonic probe Ultrasonic probe

2005-05-17

2005-05-17

Mullins, Burton S. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S322000

Reexamination Certificate

active

06894426

ABSTRACT:
An ultrasonic probe has a strip-shaped piezoelectric unit having a uniform thickness and a grounding electrode formed on the top surface, a backing material, and an acoustic matching layer bonded on the top surface of the piezoelectric unit. A conductive film is formed on a protrusively curved top surface of the backing material for applying a signal thereto for driving the piezoelectric unit. A conductive adhesive is applied between the backing material and the bottom surface of the piezoelectric unit. The conductive adhesive has a thickness which varies along the longitudinal direction of the piezoelectric unit, thereby causing a larger driving current to flow at the center of the piezoelectric unit in the longitudinal direction, and a smaller driving current to flow at both ends of the piezoelectric unit to suppress side lobes in generated ultrasonic waves.

REFERENCES:
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patent: 5392259 (1995-02-01), Bolorforosh
patent: 5640370 (1997-06-01), Hanafy et al.
patent: 5886454 (1999-03-01), Ito et al.
patent: 6278224 (2001-08-01), Sawada et al.
patent: 6406433 (2002-06-01), Mamayek
patent: 6558332 (2003-05-01), Shimizu
patent: 05-023331 (1993-02-01), None
patent: 07-274292 (1995-10-01), None

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