Patent ID: 8044374
Filing Date: 2011-10-25
Classification: H01J

Abstract:
1. Ion implantation apparatus to implant ions into planar workpieces each having a smallest width (a) in a plane of said workpiece, said apparatus comprising: a vacuum chamber; an ion beam generator in said vacuum chamber arranged to form, in operation, a beam of ions for implanting having a beam current not less than 50 mA and beam energy not less than 200 keV, said beam being directed to an implant location; and a workpiece support wheel mounted for rotation in said vacuum chamber about an axis, said support wheel having a plurality of workpiece supports located at a common radius around a periphery of said wheel, whereby rotation of said wheel passes workpieces on said supports successively through said implant location along a circular scan path defined by said wheel periphery; wherein said support wheel has a circumference at said periphery which is not less than 50*a, and has not less than 50 said workpiece supports.