Patent ID: 8461030

Claim:
A processing apparatus, comprising: a plasma source configured to produce a plasma in a plasma chamber containing ions for implantation into a workpiece; a focusing plate having an aperture configured to modify a shape of a plasma sheath proximate the focusing plate such that the ions exit the aperture to define focused ions; a processing chamber containing the workpiece that is spaced from the focusing plate wherein the focused ions have an implant width substantially narrower than the aperture and are configured to create a plurality of patterned areas in the workpiece using the aperture by scanning the workpiece during the implantation; and a workpiece holder configured to scan at a variable scan rate along a first direction of the workpiece in a given scan wherein a plurality of implanted regions of differing ion implantation levels are formed after scanning in the first direction to form at least one of the plurality of patterned areas.