Patent ID: 6839958

Claim:
An apparatus for the mounting of semiconductor chips, with a bondhead with a pick-up tool with a longitudinal drill hole to which vacuum can be applied for the gripping and transport of a semiconductor chip, and with a light source and a photosensor to detect whether the pick-up tool has gripped the semiconductor chip, whereby during transport of the pick-up tool in the absence of the semiconductor chip, light from the light source passes through the longitudinal drill hole of the pick-up tool and to the photosensor, wherein a body formed with a reflective surface is arranged in the longitudinal drill hole of the pick-up tool which deflects light shining from underneath the pick-up tool into the longitudinal drill hole of the pick-up tool into a horizontal plane, wherein the pick-up tool has locations pervious to the light of the light source and wherein at least one optical element is arranged on the bondhead which concentrates at least a part of the deflected light emerging laterally from the pick-up tool onto the photosensor.