Patent ID: 6815697
Filing Date: 2004-11-09
Classification: H01J

Abstract:
An ion beam charge neutralizer, wherein:by applying electron extraction voltage to an electron extraction electrode with an arc chamber for plasma generation, only electrons are extracted from said plasma generated arc chamber into an electron accumulating chamber, and said extracted electrons are pooled in said electron accumulating chamber and said pooled electrons are uniformly supplied throughout an entire area of a scanning area of a parallelized ion beam, which is extracted from an ion source as a normal ion beam, and the extracted normal ion beam is reciprocally scanned over a specific range in accordance with continuous-variable control drive of an electric field or a magnetic field, and the scanned ion beam is parallelized with an electric field or a magnetic field, and the parallelized ion beam is traveling towards a target object and comes down to said target object, said parallelized ion beam is neutralized by said electrons that are supplied from said electron accumulating chamber of said ion beam charge neutralizer.