Patent ID: 7287951

Claim:
A device for aligning a plurality of vertically arranged disks during the fabrication of semiconductor chips, the device comprising: a first mounting element; a second mounting element arranged at a spaced location from the first mounting element, wherein the mounting elements have individually mounted guide rollers positioned next to each other for each of the disks, said guide rollers including means for receiving the disks; a drive means for rotating azimuthal positions of the disks; a detecting means for detecting the azimuthal positions of notches arranged in the outer circumference in the disks; and a control means for controlling the drive means with the signals of the detecting means for detecting the azimuthal positions of the notches, said drive means for rotating the azimuthal positions of the disks having an individually driven drive roller element for each disk, said drive roller element being mounted on a stationary axle, said drive means including a plurality of electric motors, and a plurality of transmission elements, each of said transmission elements transmitting a driving movement from one of said electric motors to one of said drive roller elements, each of said motors being dedicated to a separate one of said drive roller elements, said control means individually controlling a driving motion of each said guide roller of said mounting elements by the signals from said detecting means.