Patent ID: 7057192

Claim:
An apparatus for ion implantation of planar surface workpieces, said apparatus comprising: means for generating an ion beam of desired species and energy; means for collimating said ion beam to form a parallel ribbon beam, said beam traveling parallel to a longitudinal axis, and having a long dimension along a major transverse axis and a short dimension along a minor transverse axis; an arm mounted on a first pivot, whose pivot axis is adjacent to said beam, is parallel to said longitudinal axis, and is located in or close to the plane containing said longitudinal axis and said major transverse axis; means for controlling the current density of said parallel ribbon beam and rendering said beam proportional to the distance from the axis of said first pivot; a chuck for a workpiece to be implanted, said chuck being attached to said arm by a second pivot whose axis is inclined to said first pivot, wherein the workpiece to be implanted is to be held by said chuck; means for adjusting said second pivot to incline the planar surface of the workpiece at a desired angle to the beam direction; and means for rotating said arm through an angle, thereby moving the workpiece through said ribbon ion beam on an arc-shaped path at a desired angular velocity and being effective to implant a desired substantially uniform dose of ions into the planar surface of the workpiece.