Patent ID: 6191427
Filing Date: 2001-02-20
Classification: G21K,H01J,H01L

Abstract:
An ion implantation system comprising:ion beam generating means for generating and emitting an ion beam containing ions of a target impurity element;a mass analyzing system for receiving the ion beam emitted from said ion beam generating means and deriving desired ions from the received ion beam to output an ion beam containing the desired ions;a beam line for defining an internal cavity upon which the ion beam emitted from said mass analyzing system becomes incident and outputting the ion beam propagated in the internal cavity;an electrostatic lens disposed in the inner cavity of said beam line for converging the ion beam incident upon the inner cavity;substrate holding means for holding a substrate into which impurities are to be implanted, in such a manner that the ion beam emitted from said beam line becomes incident upon the substrate;evacuating means coupled to said beam line for evacuating the inner cavity of said beam line; andplasma generating means for generating plasma which electrically neutralizes a space in which the ion beam propagates in said beam line, said plasma generating means being mounted downstream of a position of said electrostatic lens in said beam line and a position of said evacuating means.