Patent ID: 6281964
Filing Date: 2001-08-28
Classification: G03F

Abstract:
A projection exposure apparatus, comprising:an illumination optical system for illuminating an original with light from a light source, said illumination optical system including an optical integrator having a plurality of lenses, and a transparent substrate disposed juxtaposed to a light entrance surface of said optical integrator and having a light quantity adjusting film formed thereon for blocking a portion of light directed to at least one lens of said plurality of lenses, wherein said light quantity adjusting film includes at least one portion which is provided in relation to the at least one lens of said plurality of lenses, said transparent substrate being movable in a direction intersecting an optical axis to thereby change a light quantity distribution on a light entrance surface of the at least one lens so as to change an illuminance distribution on a plane to be illuminated; anda projection optical system for projecting a pattern of the original, illuminated with the light, onto a substrate to be exposed.