Wire pull testing is a time zero test for wire bond strength and quality; the wire being tested is pulled upward until the wire or bond to the die or substrate breaks.

Destructive pull test: for process set up
Non destructive pull test: in line test for high reliability packaging applications

Bond shear testing assesses the strength of a ball bond, complementing wire pull testing. Data measured provides the force needed to shear a ball off its pad.

The shear force reading of a ball bond may be correlated with the ball diameter for proper assessment of its ball shear strength.

The shear force reading of a wedge bond must be correlated to the tensile strength of the wire for proper assessment of its wedge shear strength.

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