Patent ID: 7378668
Filing Date: 2008-05-27
Classification: B82Y,H01J

Abstract:
1. A charged particle beam applying apparatus including a charged particle gun that generates and accelerates a charged particle beam, a lens that converges the charged particle beam, a deflector that controls a traveling direction of the charged particle beam, a stage on which a test sample is mounted, a vacuum pump that keeps a path of the charged particle beam in a substantially vacuum state, the apparatus comprising: a crossover forming lens for causing one of a crossover of the charged particle beam emitted from the charged particle gun and an intermediate image of the crossover to be formed; a shielding plate provided with an end face for regulating an image forming plate of the crossover forming lens; an aligner for scanning the shielding plate with the charged particle beam; and means for measuring an amount of the charged particle beam shielded by the shielding plate.