Patent ID: 8302841

Claim:
A method of calibrating a wire payout related to predetermined looping motions used during formation of a wire loop, the wire loop being formed by a wire bonding system including a bond head, the bond head including a wire clamp and a bonding tool, the method comprising the steps of: (a) determining a first wire payout length related to predetermined wire looping motions used in forming a first wire loop, the predetermined looping motions being performed on a first wire bonding system, the first wire payout length related to the predetermined wire looping motions being a length of wire in the first wire loop caused by the predetermined looping motions which is beyond a length that would be in a relatively straight wire loop; (b) determining a second wire payout length related to the predetermined wire looping motions used in forming a second wire loop, the predetermined looping motions used during step (b) being performed on one of (1) a second wire bonding system that is different than the first wire bonding system, or (2) the first wire bonding system with at least one wire bonding system variable changed from step (a), the second wire payout length related to the predetermined looping motions being a length of wire in the second wire loop caused by the predetermined wire looping motions which is beyond a length that would be in a relatively straight wire loop; and (c) adjusting at least one wire bonding process variable, and repeating step (b) with the at least one adjusted wire bonding process variable such that the second wire payout length determined in the repeated step (b) is closer to the first wire payout length than the second wire payout length determined in the initial step (b).