Patent ID: 6945446

Claim:
A wire bonding method for a wire bonding apparatus equipped with: a capillary through which a wire passes and which performs bonding on a workpiece, a position detection camera which images said workpiece, and a light path conversion means that directs an image near a lower end of said capillary to said position detection camera, said method comprising the steps of: acquiring, with said light path conversion means, an image of an area near a lower end of said capillary by way of directing said image to said position detection camera, and processing said image, thus obtaining at least one of: a diameter of a ball formed on a wire extending from the lower end of said capillary, a tail length extending from the lower end of said capillary, a ball position from an undersurface of said capillary, bending of a tail of said wire, an external appearance of said capillary, and amplitude of vibration of said capillary when an ultrasonic vibration is applied to said capillary.