Patent ID: 7655929
Filing Date: 2010-02-02
Classification: H01J

Abstract:
1. An ion beam measuring method to be performed in an ion implanting apparatus for, not through scanning in x direction, irradiating a target with an ion beam which has a ribbon-like shape where a size in x direction is larger than a size in y direction that is substantially orthogonal to the x direction, said ion implanting apparatus having a forestage multipoints Faraday and a poststage multipoints Faraday on upstream and downstream sides of said target, respectively, each of said forestage multipoints Faraday and said poststage multipoints Faraday being configured by juxtaposing in the x direction plural detectors which measure a beam current of the ion beam, said ion implanting apparatus further having a forestage beam restricting shutter which is disposed in a vicinity of an upstream of said forestage multipoints Faraday to block the ion beam, and which has a side that is substantially parallel to the x direction, a forestage shutter driving apparatus which drives said forestage beam restricting shutter in the y direction, a poststage beam restricting shutter which is disposed in a vicinity of an upstream of said poststage multipoints Faraday to block the ion beam, and which has a side that is substantially parallel to the x direction, and a poststage shutter driving apparatus which drives said poststage beam restricting shutter in the y direction, said ion beam measuring method comprising: a forestage beam current density distribution measuring step of, while driving said forestage beam restricting shutter in the y direction by said forestage shutter driving apparatus, measuring a change of a beam current of the ion beam which passes an outside of the side of said forestage beam restricting shutter, and which is incident on said forestage multipoints Faraday, to obtain a beam current density distribution in the y direction of the ion beam at a position of said forestage beam restricting shutter; a forestage center position calculating step of, from the beam current density distribution obtained in said forestage beam current density distribution measuring step, obtaining a center position y a poststage beam current density distribution measuring step of, while driving said poststage beam restricting shutter in the y direction by said poststage shutter driving apparatus, measuring a change of a beam current of the ion beam which passes an outside of the side of said poststage beam restricting shutter, and which is incident on said poststage multipoints Faraday, to obtain a beam current density distribution in the y direction of the ion beam at a position of said poststage beam restricting shutter; a poststage center position calculating step of, from the beam current density distribution obtained in said poststage beam current density distribution measuring step, obtaining a center position y an angle deviation calculating step of, using the center position y