Patent ID: 8791430

Claim:
An apparatus for scanning a workpiece through an ion beam, comprising: an elongated member adapted to mount a workpiece at a first end; a rotational mechanism mounting the elongated member at a point of rotation located on the elongated member away from the first end, and adapted to repetitively scan the workpiece through the ion beam along an arcuate path; a slow-scan mechanism suspending the elongated member and rotational mechanism, and adapted to cause linear movement of the rotational mechanism and the elongated member, to cause different portions of the workpiece to pass through the ion beam, the slow-scan mechanism comprising: a shuttle drive assembly having a rail and a shuttle, the rotational mechanism being attached to and suspended by the shuttle at an attachment point located outside a longitudinal plane of symmetry of the rail; a first pulley; a second pulley; a first belt mounted over the first and second pulleys, and attached to the shuttle; and a drive mechanism to actuate the first belt.