Patent ID: 6037717
Filing Date: 2000-03-14
Classification: H01J

Abstract:
A method for controlling position of an ion beam on the surface of an object to be treated with said ion beam, comprising:providing a cold-cathode ion source with crossed electrical and magnetic fields and with at least one ion-emitting slit, said ion source having a voltage source,an anode connected to a positive potential of said voltage source; and acathode which comprises at least two parts which are electrically isolated from each other and form said ion-emitting slit; at least one of said two parts being connected to said voltage source;activating said ion source and generating an ion beam which is emitted through said at least one ion-emitting slit toward said object, said ion beam being charged positively with respect to said at least one part of said cathode which is connected to said voltage source;applying a potential to said at least one part of said cathode from said voltage source for generating an electric field across said at least one ion-emitting slit;acting by said electric field onto said ion beam; anddeviating said ion beam in a direction transverse to said direction of said ion beam.