Patent ID: 6207959
Filing Date: 2001-03-27
Classification: H01J

Abstract:
An ion implanter for sequentially processing single semiconductor wafers comprising:a scanning arm extending along a first axis between an outer end and an inner end,a wafer holder mounted on the inner end of said arm to hold a wafer in a plane generally parallel to said first axis and arranged for rotation relative to the arm about a second axis centred on and perpendicular to the plane of a wafer on the wafer holder,a scanning mechanism connected to the outer end of said arm for repeatedly reciprocating the arm transversely of said first axis to scan a wafer on the wafer holder to and fro through an ion beam,a rotary motor mounted in the scanning arm inwardly of said outer end thereof, the rotary motor having its axis of rotation extending in the direction of said first axis and perpendicular to said second axis,and a right angle rotary drive mechanism connecting the motor to the wafer holder for controlling rotation of the wafer holder about said second axis.