Wire bonding technique for integrated circuit board connections
Abstract:
A method is provided for connecting a chip die to a circuit board with a capillary dispenser to deposit gold. The method includes forming a first bond by depositing gold from the dispenser to a board pad on the circuit board; forming a second bond by depositing the gold from the dispenser to a die pad on the chip die; extruding a filament of the gold by the dispenser in a normal direction from the second bond; rotating the filament laterally away from the first bond along a first radius; extruding the filament while rotating the filament towards the first bond along a second radius larger than the first radius; and forming a third bond by depositing the gold on the first bond to form a third bond.
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