Patent ID: 7750321
Filing Date: 2010-07-06
Classification: H01J

Abstract:
1. A positioning device for positioning an aperture plate in an ion beam of an ion implantation system, where the positioning device has two movable fixture parts that can move relative to each other by means of at least one position drive, a first fixture part being connected to an abutment point disposed in a fixed position relative to an ion beam source, and a second fixture part being connected to the aperture plate, wherein an adjustment device having a fixture device and a display device is provided, said fixture device being operable so that the position of at least one of the fixture parts can be changed relative to the positioning drive, and the display device has at least one reference mark on the first fixture part or a part that is connected to it in a fixed position, wherein the display device on the second fixture part has at least one optical projection device by which means at least one optical marking that is assigned to at least one reference mark is projected onto the first fixture part.