Patent ID: 7140529
Filing Date: 2006-11-28
Classification: B23K,H01L

Abstract:
1. A wire bonding apparatus in which a piezoelectric element is provided near a capillary attachment portion of a bonding arm so that said capillary is caused to vibrate in an axial direction of said bonding arm when said piezoelectric element is driven by a piezoelectric element driving power source during bonding of said wire, said wire bonding apparatus is comprising: a detector for detecting voltage or current generated by said piezoelectric element when said capillary is lowered and contacts an object of bonding, a bonding arm control circuit for controlling lowering of said bonding arm in accordance with changes in the voltage or current detected by said detector, and a switching means that switches said piezoelectric element between said detector for detecting contact and said piezoelectric element driving power source for wire bonding.