Patent ID: 9218941
Filing Date: 2015-12-22
Classification: H01J

Abstract:
1. An ion implantation system configured to provide a selectively variable energy ion beam to a workpiece, comprising: an ion source configured to ionize a dopant material for generating an ion beam; a mass analyzer positioned downstream of the ion source, configured to provide a mass resolved ion beam; a deceleration/acceleration stage positioned downstream of the mass analyzer configured to receive the mass resolved ion beam to produce the selectively variable energy ion beam; an end station positioned downstream of the deceleration/acceleration stage, wherein the end station includes a workpiece support configured to selectively position the workpiece before the selectively variable energy ion beam for ion implantation thereby; a scanning apparatus configured to scan one or more of the ion beam and workpiece support with respect to one another; one or more power sources operably coupled to one or more of the ion source, mass analyzer, and deceleration/acceleration stages; and a controller coupled to said one or more power sources and configured to selectively vary at least a bias voltage supplied to the deceleration/acceleration stage concurrent with the scanning of the ion beam and/or workpiece support, wherein the selective variation of the at least one bias voltage supplied to the deceleration/acceleration stage is based, at least in part, on a position of the ion beam with respect to the workpiece to provide a selectively variable energy ion beam thereto.