Patent ID: 6864959

Claim:
An exposure apparatus which exposes an object with an illumination beam irradiated on a mask from a light source, comprising: an illumination optical system disposed on an optical path along which the illumination beam passes to illuminate the mask with the illumination beam through an optical integrator; an optical unit disposed between the light source and the optical integrator in the illumination optical system to form an intensity distribution of the illumination beam, on a Fourier transform plane with respect to a pattern surface of the mask, that has an increased intensity portion apart from an optical axis of the illumination optical system relative to a portion thereof on the optical axis, and that includes a deflection optical element that deflects at least a part of the illumination beam to generate a deflected beam in a different direction from the optical axis; and an array optical device disposed between the optical unit and the optical integrator in the illumination optical system, of which a plurality of optical elements are two-dimensionally arranged on a plane perpendicular to an optical axis of the illumination optical system.