Kulicke and Soffa Industries, Inc.
METHODS OF DETERMINING SHEAR STRENGTH OF BONDED FREE AIR BALLS ON WIRE BONDING MACHINES

Abstract:

A method of determining a shear strength of a bonded free air ball on a wire bonding machine is provided. The method includes the steps of: (a) providing a free air ball at a working end of a wire bonding tool; (b) bonding the free air ball to a bonding location of a workpiece; (c) moving the wire bonding tool, while in contact with the bonded free air ball, in a direction along the bonding location; (d) monitoring wire bonding process signals during step (c); and (e) determining a shear strength using the wire bonding process signals monitored in step (d).