Patent ID: 7810698

Claim:
An apparatus for correcting a positional offset of a bonding tool during bonding operations, comprising: a first fiducial mark and a second fiducial mark spaced from the first fiducial mark located on the bonding tool, wherein a first imaging path emanates from the first fiducial mark and a second imaging path emanates from the second fiducial mark when the first and second fiducial marks are illuminated at a reference position; an optical system positioned along the first and second imaging paths which is operative to view images of the first and second fiducial marks; a first reflective surface operative to reflect the first optical path from the first fiducial mark towards the optical system and a second reflective surface operative to reflect the second optical path from the second fiducial mark towards the optical system; and a processor for calculating a current position of the bonding tool and for comparing it to a desired position so that the bonding tool's positional offset may be corrected by moving it to the desired position.