The invention provides a wire bonding method which enables formation of a
low loop having a height not exceeding two times the wire diameter and
secures sufficient pull strength of the wire even with the low loop
shape. After having formed a contact-bonded ball at a first bonding
point, a capillary moves upward and then toward a second bonding point to
press a side surface of an upper portion of the contact-bonded ball, so
that a protruded portion is formed on a top portion of the contact-bonded
ball on the side of the second bonding point. After having formed the
protruded portion of the contact-bonded ball, the capillary moves upward,
and then downward while moving toward the second bonding point to press
the protruded portion, so that a wire drawing portion for drawing the
wire from the top portion of the contact-bonded ball horizontally is
formed.