Patent ID: 7549568

Claim:
A method of forming an identification code for wire bonders, comprising the steps of: providing a chip having a plurality of bonding pads; securing the chip to a chip carrier, wherein the chip carrier has a plurality of bonding fingers; dividing each of the bonding fingers by a baseline into a first coding area adjacent the bonding pads and a second coding area further away form the bonding pads than the first coding area; wire-bonding a plurality of bonding wires to electrically connect the bonding pads to the bonding fingers, one end of each bonding wire being bonded to a bonding finger and selectively bonded to either the first coding area or the second coding area of that bonding finger but not both; acquiring a code value for each bonding wire based on the location of the bonding of the end of the bonding wire to either the first or second coding area; forming an identification code for wire bonders using the code values of the bonding wires.