Patent ID: 8198610
Filing Date: 2012-06-12
Classification: H01J

Abstract:
1. An ion implanter, comprising: an ion source used to provide an ion beam; a holder used to hold a wafer to be implanted; an aperture assembly having a variable aperture, wherein said aperture assembly is used to shape said ion beam before said wafer is implanted by shaped said ion beam, and wherein one or more of size and shape of said variable aperture of said aperture assembly is adjusted so that one or more of size and shape of said ion beam is changed when said ion beam passes through said variable aperture; and an aperture driving assembly used to adjust a relative geometric relation between said aperture assembly and said ion beam, said aperture driving assembly comprising a shaft and at least one arm, wherein said shaft is connected with a chamber wall surrounding both said holder and said aperture assembly, each said arm is connected to said shaft respectively, and said aperture assembly is disposed on each said arm, and wherein said shaft is used to move said aperture assembly along a specific direction different than the direction of said ion beam, and said shaft is used to rotate said aperture assembly around said shaft.