Patent ID: 8569163

Claim:
A manufacturing method of a semiconductor device which method forms a ball at a tip of a conductive wire passed through a capillary as a bonding tool, and performs wire bonding of the ball to an electrode pad of a semiconductor chip, comprising the steps of: (a) providing the semiconductor chip having a plurality of electrode pads formed in a main surface thereof, each of said electrode pads having aluminum as a principal component; and (b) applying an ultrasonic wave along an application direction to electrically couple the ball at the tip of the conductive wire to each of the electrode pads, the conductive wire having copper as a principal component, wherein in the step (b), when performing the wire bonding to, among the electrode pads, first electrode pads that are arrayed in a first direction along the application direction of the ultrasonic wave, the ball and each of the first electrode pads are coupled to each other while being rubbed against each other along a second direction transverse to the application direction of the ultrasonic wave.