Patent ID: 7475802
Filing Date: 2009-01-13
Classification: B23K,H01L

Abstract:
1. A method for low loop wire bonding, comprising: forming a first bond between a first bonding ball disposed at an end of a first wire and a bond pad of a die, the die coupled to a leadframe having one or more leads; forming a second bond between a portion of the wire and a lead of the leadframe, the length of wire between the first and second bonds forming a loop in the wire having a first loop height; disposing a second bonding ball on top of the first bonding ball, a portion of the loop being compressed between the first and second bonding balls, the compressed loop having a second loop height less than the first loop height by between about 25 μm and about 13 μm; and forming a third bond between the second bonding ball, the wire, and the first bonding ball.