Patent ID: 6762421
Filing Date: 2004-07-13
Classification: B82Y,H01J,Y10S

Abstract:
A charged particle beam exposure apparatus, comprising:a beam gun which emits a charged particle beam; a projection optics which shapes said charged particle beam and projects a desired pattern; an incident energy control circuit which controls an incident energy of said projection optics; a sample stage loaded with a sample in which an image projected from said projection optics is to be formed, a plurality of first marks are formed beforehand, and a plurality of second marks are exposed to said charged particle beam with a first incident energy by said projection optics in the vicinity of said plurality of first marks; a detector to detect an electron signal generated from a region including said plurality of first marks and said plurality of second marks, when said region is scanned with a second incident energy different from said first incident energy; a calculation circuit which calculates a positional shift amount between said plurality of first marks and said plurality of second marks from said detected electron signal; a correction circuit which corrects positions of said plurality of first marks on said sample based on said calculated positional shift amount; and an exposure control circuit which aligns said desired pattern based on corrected positions of said plurality of first marks.