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Illumination optical system, exposure apparatus, and exposure method

  • US 20100149511A1
  • Filed: 02/17/2010
  • Published: 06/17/2010
  • Est. Priority Date: 12/03/2002
  • Status: Abandoned Application
First Claim
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1. An illumination optical system that illuminates an irradiated surface with light supplied from a light source, the illumination optical system comprising:

  • a diffractive optical element disposed in an optical path of linearly polarized light supplied from the light source and that forms a multipole illumination field including a plurality of illumination fields;

    an optical integrator that forms a multipole light source including a plurality of planar light sources with light that has passed through the multipole illumination field; and

    a polarization optical member disposed in an illumination optical path and that sets a polarization direction of light that has passed through the multipole light source to a predetermined polarization direction.

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