Patent ID: 6320321
Filing Date: 2001-11-20
Classification: H01J

Abstract:
An ion beam processing apparatus, comprising:an ion source for producing a processing plasma,a processing chamber provided as a vacuum chamber for accommodating a process target being disposed adjacent to said ion source,an extract electrode disposed between said ion source and said processing chamber for extracting an ion beam from said processing plasma into said processing chamber so as to irradiate on said process target,a neutralizing plasma generating means for generating an annular neutralizing plasma by introducing a microwave from outside the processing chamber through an opening thereof into a region in the vicinity of said extract electrode within the processing chamber so as to guide said microwave into an annular magnetic field which is formed in a circumference of a propagation region of said processing ion beam, andan ion collecting means for collecting ions from said neutralizing plasma, said ion collecting means being maintained at a negative potential relative to a potential of said processing chamber.