Patent ID: 6774373
Filing Date: 2004-08-10
Classification: H01J,H01L

Abstract:
An ion beam implanter comprising:a) an ion beam source for generating an ion beam moving along a beam line; b) an implantation chamber defining an interior region wherein a workpiece is positioned to intersect the ion beam for ion implantation of an implantation surface of the workpiece by the ion beam; and c) workpiece support structure coupled to the implantation chamber and supporting the workpiece, the workpiece support structure including: 1) a first rotation member rotatably coupled to the implantation chamber and including an opening extending through the rotation member and aligned with an opening in a wall of the implantation chamber; 2) a second rotation member rotatably coupled to the first rotation member and having an axis of rotation offset from an axis of rotation of the first rotation member, the second rotation member overlying the opening of the first rotation member; 3) a third member fixedly attached to the second rotation member, the third member including a rotatable drive supporting the workpiece, the rotatable drive being rotatable with respect the first and second rotation members, extending through the second rotation member and the opening of the first rotation member, the first rotation member, the second rotation member and the rotatable drive of the third rotation member rotating to move the workpiece along a path of travel for implantation of the implantation surface wherein a distance that the ion beam moves through the implantation chamber before striking the implantation surface of the workpiece is constant.