Patent ID: 7748599

Claim:
A wire bonding method for connecting a first bonding point and a second bonding point with a wire using a capillary, the method comprising: contact-bonding a free air ball at a distal end of the capillary to the first bonding point to form a contact-bonded ball having a desired bonding thickness; moving the capillary upward after having formed the contact-bonded ball so that a chamfer surface of the capillary is positioned facing a side surface of an upper portion of the contact-bonded ball; and then pressing the side surface of the upper portion of the contact-bonded ball with the capillary while moving the capillary toward the second bonding point, to thereby form a top portion of the contact-bonded ball; wherein a protruded portion is formed on a side facing the second bonding point on the top portion of the contact-bonded ball; and wherein a wire drawing portion for drawing a wire horizontally from the top portion of the contact-bonded ball is formed by the capillary moving upward after having formed the protruded portion and, after having moved upward, moving downward while moving toward the second bonding point, and pressing an upper portion of the protruded portion.