Multi resonance unibody ultrasonic transducer

Details Multi resonance unibody ultrasonic transducer Multi resonance unibody ultrasonic transducer

1996-05-28

1997-12-23

Heinrich, Samuel M.

Metal fusion bonding

Process

Using high frequency vibratory energy

2281805, H01L 21607

Patent

active

056999534

ABSTRACT:
A multi-resonance frequency ultrasonic transducer has 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.

REFERENCES:
patent: 3578996 (1971-05-01), Balamuth
patent: 4586642 (1986-05-01), Dreibelbis et al.
patent: 4854494 (1989-08-01), Von Raben
patent: 5494207 (1996-02-01), Asanasavest

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