Patent ID: 6710854
Filing Date: 2004-03-23
Classification: G03F

Abstract:
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 different intensity distributions of the illumination beam on a Fourier transform plane with respect to a pattern surface of the mask, one of the different intensity distributions having an increased intensity portion apart from an optical axis of the illumination optical system relative to a portion of the one intensity distribution on the optical axis, and the optical unit including a first element to adjust a position of the increased intensity portion in a first direction on the Fourier transform plane and a second element to adjust the position of the increased intensity portion in a second direction perpendicular to the first direction.