Patent ID: 6784442
Filing Date: 2004-08-31
Classification: B82Y,H01J

Abstract:
An exposure apparatus which draws a pattern on a substrate with a plurality of charged-particle beams, comprising:a charged-particle beam generation source which generates a plurality of charged-particle beams grouped into a plurality of groups each formed from at least one charged-particle beam; a magnetic lens array which is constituted by arraying a plurality of magnetic lenses corresponding to the plurality of groups between said charged-particle beam generation source and a substrate stage which supports the substrate, the plurality of magnetic lenses being excited by a common excitation unit; a plurality of electron-optic elements which are arranged in correspondence with the plurality of groups and individually correct electron-optic characteristics of the plurality of magnetic lenses; and a control system which controls the common excitation unit to adjust the electron-optic characteristics of the plurality of magnetic lenses at once, and individually controls said plurality of electron-optic elements to individually correct the electron-optic characteristics of the plurality of magnetic lenses, thereby optimizing an image formed on the substrate with the plurality of charged-particle beams grouped into the plurality of groups.