Patent ID: 7041988

Claim:
An electron beam exposure apparatus for exposing wafer with an electron beam, comprising: a first electromagnetic doublet lens system operable to make said electron beam that was incident substantially perpendicularly on a first plane be incident on a second plane substantially perpendicularly, said first electromagnetic doublet lens system including a plurality of electromagnetic lenses; a second electromagnetic doublet lens system operable to make said electron beam that was substantially perpendicularly incident on said second plane be incident on said wafer substantially perpendicularly, said second electromagnetic doublet lens system including a plurality of electromagnetic lenses; a rotation correction lens operable to correct rotation of said electron beam caused by at least said first electromagnetic lens system, said rotation correction lens being provided within said first electromagnetic doublet lens system; a deflection system operable to deflect said electron beam to a position on said wafer, that is to be irradiated with said electron beam; and a deflection-correction optical system operable to correct deflection aberration caused by said deflection system, said deflection-correction optical system being provided within said second electromagnetic doublet lens system; wherein said first electromagnetic doublet lens system further includes a first electromagnetic lens having a first focal length and a second electromagnetic lens having a second focal length, said second electromagnetic lens being arranged away from said first electromagnetic lens substantially equal to a distance obtained by adding said first focal length and said second focal length, and wherein said first electromagnetic lens generates a magnetic field in a first direction and said second electromagnetic lens generates a magnetic field in a second direction opposite to said first direction; and wherein said second electromagnetic doublet lens system further includes a third electromagnetic lens having a third focal length and a fourth electromagnetic lens having a fourth focal length, said fourth electromagnetic lens being arranged away from said third electromagnetic lens substantially equal to a distance obtained by adding said third focal length and said fourth focal length, and wherein said third electromagnetic lens generates a magnetic field in said second direction, and said fourth electromagnetic lens generates a magnetic field in said first direction.