Patent ID: 6779702
Filing Date: 2004-08-24
Classification: B23K,H01L

Abstract:
A wire bonding apparatus including a horn driver for generating ultrasonic waves, an ultrasonic horn and a capillary, wherein said ultrasonic horn comprises:a first section fixed to said horn driver and having a first definite cross section; a second section including an end for mounting said capillary and having a second definite cross section smaller than said first definite cross section; and a third section between said first and second sections, having a gradually-changed cross section from said first definite cross section to said second definite cross section, and wherein stepped grooves are formed on a portion of said third section, each of said stepped groves being formed by a first face in parallel with a propagation direction of said ultrasonic waves within said ultrasonic horn and a second face perpendicular to the propagation direction of said ultrasonic waves within said ultrasonic horn.