Multi resonance unibody ultrasonic transducer
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United States of America Patent
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-
Nov 26, 1996
Grant Date -
N/A
app pub date -
Dec 5, 1994
filing date -
Dec 5, 1994
priority date (Note) -
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Importance
Abstract
A multi-resonance frequency ultrasonic transducer as a plurality of useful resonance frequencies for wire bonding operation and comprises an integral unibody with a rectangular aperture in the center of its mass. A multi-frequency stack of transducer drivers is mounted in the rectangular aperture with compression wedges. The length L of the stack of transducer drivers is equal to or less than one-quarter of one wavelength of the lower useful resonance frequency and the design envelopes for the useful frequencies embrace two or more useful fixed frequencies separated from spurious unusable frequencies by a minimum of two kilohertz.
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