Kulicke and Soffa Industries, Inc.

Lawrence M Rubin

Dan Vilenski

Albert Soffa

Glenn B Bilane

A method for high speed bonding of fine wires to electrodes includes a method of teaching the wire bonding tool the exact point of engagement of the bonding tool with the semiconductor. The bonding position point of engagement is employed to calculate a tolerance inflection point representative of the point in space where the bonding tool must start a constant velocity approach to the first bonding position. In similar manner, the point of engagement of the bonding tool with the semiconductor is determined and from that position a reset point is calculated representative of point in space where the bonding tool will start its rapid decelleration approach to the tolerance inflection point. The bonding tool may then be acceleration toward the bonding position with optimum speed without crashing into the semiconductor.

Wire bonding apparatus

A method for high speed bonding of fine wires to electrodes is provided employing a processor controlled wire bonder wherein the bonding tool of the wire bonder is positioned over an electrode on a simiconductor and is accelerated toward the electrode. Shortly before the bonding tool reaches the electrode, the bonding tool is moved toward the electrode at a substantially linear predetermined velocity so that the bonding tool imparts a controlled kinetic energy to the wire as a first bonding force, a second predetermined preload bonding force is applied to the bonding tool at the time of engagement and subsequently a third and final predetermined bonding force is applied to the bonding tool to bond the fine wire to the electrode at high speeds.

High speed wire bonding method

An apparatus for bonding wires on semiconductors is provided with a processor controlled vertical drive mechanism coupled to a novel bonding head of the type having a bonding tool mounted therein. The height of the bonding tool at the reset position and at the bonding position may be programmed into the processor for different semiconductor devices or workpieces. Indicating means are provided on the novel bonding head for establishing the reset position and the bonding positions so that the bonding tool is taught a series of predetermined vertical positions during a bonding cycle. The apparatus is also programmed to compute intermediate positions between said predetermined vertical positions to obtain optimum high speed movement of the bonding head and the bonding tool during subsequent bonding cycles.

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Coatesville, PA, United States of America

Lawrence M Rubin