Patent ID: 6734437
Filing Date: 2004-05-11
Classification: H01J

Abstract:
An electron beam irradiation system comprising:a support mechanism comprising a slide table for holding and rotating a target for being irradiated with an electron beam such that the target can move radially, said support mechanism being placed in the atmosphere; electron beam irradiation portion for shooting the electron beam while maintaining a space over said target in a vacuum; means between the electron beam irradiation portion and the support mechanism comprising a floating pad with beam passage therein and stretchable connecting means for maintaining a vacuum in an enclosed space adjacent the target; and a focusing stage onto which said electron beam may be irradiated for bringing the electron beam into focus, said focusing stage being fixedly mounted in a position adjacent to said target on the slide table of said support mechanism; said electron beam irradiation portion having a focusing lens for sharply focusing the electron beam onto said target and a deflector for scanning said electron beam in two dimensions; said focusing stage having a built-in Faraday cup having a knife edge, said Faraday cup being capable of detecting an incident current.