Patent ID: 8586416
Filing Date: 2013-11-19
Classification: B23K,H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: (a) preparing a wiring board over which a semiconductor chip is mounted; and (b) electrically connecting a conductive wire to the semiconductor chip, wherein the step (b) includes: (b1) preparing a ball formation unit having a top surface and a bottom surface opposite the top surface, and including a ball formation portion, a gas inlet portion for introducing an antioxidant gas into the ball formation portion, a gas outlet portion for discharging the antioxidant gas from the ball formation portion, and a torch electrode for discharging electricity to the conductive wire in the ball formation portion; (b2) disposing a tip portion of a capillary in the ball formation portion in a state where a tip portion of the conductive wire projects from the tip portion of a capillary; (b3) forming an initial ball at the tip portion of the conductive wire by discharging electricity to the tip portion of the conductive wire from the torch electrode in a state where the antioxidant gas is filled in the ball formation portion by introducing the antioxidant gas from the gas inlet portion, passing the antioxidant gas from the gas inlet portion in a first direction in a top surface view, and discharging the antioxidant gas from the gas outlet portion in a second direction different from the first direction in the top surface view, and (b4) bonding the initial ball of the conductive wire to an electrode pad of the semiconductor chip.