Patent ID: 8431891
Filing Date: 2013-04-30
Classification: H01J

Abstract:
1. An ion beam processing apparatus comprising: a first sample stage that holds a sample; an ion source that generates an ion beam; an ion beam irradiation optical system that irradiates the ion beam along an ion beam irradiation axis to the sample held on the first sample stage; an electron beam irradiation optical system that irradiates an electron beam along an electron beam irradiation axis to the sample; a probe that carries a test piece extracted from the sample by performing ion beam processing; and a second sample stage on which the test piece is mounted, wherein the ion beam processing apparatus is configured to have a tilting ability to vary an angle of irradiation, at which the ion beam is irradiated to the sample, by tilting the second sample stage; the ion beam irradiation optical system comprises an irradiation optical system that irradiates the ion beam to the sample through a mask including an opening of a d rectangular shape to form a rectangular ion beam; and the ion beam processing apparatus further comprises a control device configured to control widths of edges of an intensity profile representing edges of the rectangular beam so that a width of an edge of the intensity profile representing an edge of the rectangular ion beam, which is irradiated to the sample, in a direction perpendicular to a direction in which a tilting axis of the second sample stage is projected on the second sample stage surface will be smaller than a width of an edge of an intensity profile representing another edge of the rectangular ion beam in a direction parallel to the direction in which the tilting axis of the second sample stage is projected on the second sample stage surface, wherein said control device controls said widths of said edges of the intensity profile independently of the shape of the rectangular ion beam, and wherein said control device includes at least one of an ion source aperture plate and a stencil mask.