Patent ID: 7229906
Filing Date: 2007-06-12
Classification: H01L

Abstract:
1. A method for forming a bump for semiconductor electrical interconnection using a wire bonding machine, said method comprising the steps of: (1) forming a ball bond at a first bond location using a wire bonding machine with wire, said wire bonding machine having a capillary; (2) raising said capillary a first height such that wire attached to said ball bond pays out of said capillary; (3) moving said capillary laterally a first lateral distance in a first direction; (4) raising said capillary further by a second height; (5) moving said capillary in a second direction, said second direction having a downward component and a lateral component to form a fold of wire on the ball bond, said lateral component being generally opposite of said first direction; and (6) severing said wire from said bump, wherein a face of the capillary smooths at least a portion of the fold of wire during step (5).