Patent ID: 6548381
Filing Date: 2003-04-15
Classification: H01J,H01L

Abstract:
A method of operating an ion beam irradiation apparatus comprising the steps of:(a) applying a positive voltage to a plasma generator by a DC power source when the ion beam travels in a vacuum chamber; (b) leading secondary electrons into the plasma generator from the vacuum chamber by the positive voltage, the secondary electrons being generated by a collision of the ion beam with the plasma generating gas which is flown out of the plasma generator into the vacuum chamber by the positive voltage; (c) igniting a plasma by the secondary electrons as a trigger of an ignition, when a radio frequency generator introduces a radio frequency; (d) irradiating the ion beam on a substrate; and (e) supplying the plasma to the substrate for suppressing a charge-up of the substrate while irradiating the plasma on the substrate.