Method of making a miniature, high efficiency dual frequency ult

Details Method of making a miniature, high efficiency dual frequency ult Method of making a miniature, high efficiency dual frequency ult

1996-12-02

1998-04-21

Hall, Carl E.

Metal working

Piezoelectric device making

310334, 310369, H01L 4122

Patent

active

057405964

ABSTRACT:
Ultrasonic transducer with a selectable beamwidth comprising a body of piezoelectric material in the form of an annulus having an outer diameter D and a thickness T. The body has proximal and distal generally planar parallel surfaces and a centrally disposed hole extending therethrough. The body has a cylindrical wall with a width W extending from the hole to the outer diameter. The transducer is capable-of operating at low and high resonance frequencies with the low frequency resonance being determined by the diameter D and an aspect ratio of D/T and the high frequency resonance being determined by the thickness T and an aspect ratio of W/T.

REFERENCES:
patent: 1907425 (1933-05-01), Marrison
patent: 5059851 (1991-10-01), Corl et al.

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