Kulicke and Soffa Industries, Inc.

Michael Negin

George Michael Berkin

I Marvin Weilerstein

Albert J Zielenski

Michael McBrearty

Apparatus is provided for monitoring the bond condition of a fine aluminum wire being ultrasonically bonded to an electrode pad. The apparatus comprises a counter for generating a start and stop signal indicative of a predetermined plurality of cycles from the ultrasonic generator of the ultrasonic bonder. A stable source of pulses is applied to a second counter which is started and stopped by the start and stop signal. The count stored in the second counter is read out to a microprocessor and is indicative of the frequency of the ultrasonic generator during the bonding operation. A plurality of frequency readings are taken and measured during the formation of an ultrasonic wedge bond and this information is employed to calculate a bond quality rating which accurately predicts whether a good bond has been made or some condition exists indicating that a good bond has not been made.

Apparatus for detecting missing wires

An improved pattern recognition system is disclosed which converts rows and columns of digitized video signal elements indicative of light intensity falling on a camera into integrated signatures, one for each of two orthogonal directions. Signatures corresponding to effectively rotated images may also be provided. Portions of the signatures having the most useful information contained therein are selected by comparison with subsets of the total signatures in a teach mode. In a run mode, the thus selected sub signatures are compared with snapshot signatures of a target object, such as integrated circuit dice, for precise location of corresponding portions of the target object.

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Cinnaminson, NJ, United States of America

Michael Negin