| abstract |
A method is disclosed for on-line doping of metallic connecting wire for use in integrated circuits. The method comprises the steps of: providing a bonding apparatus (70) comprising a bonding tool (40), said bonding tool having a tip (44) through which a capillary (42) runs, such that metallic connecting wire (20) may be fed through said tip (44); extending an end of the connecting wire (20) a predetermined length beyond the tip (44) of said bonding tool (40); and forming a doped area on the end of said wire by: bringing the end of said wire into contact with dopant material (52), and applying predetermined amounts of pressure, heat, and ultrasonic vibration to said end of the wire (20) for a predetermined amount of time. |