Patent ID: 8042725

Claim:
A wire bonding method for connecting a first bonding point and a second bonding point with an integrally formed 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.