Patent ID: 6108140
Filing Date: 2000-08-22
Classification: G02B,G03F

Abstract:
An exposing method, comprising:illuminating a reticle with a linearly polarized light beam;further diverging, with a first lens unit, the light beam which has already been diverged by said reticle and thereby providing a light beam from said first lens unit with predetermined divergence;introducing the light beam diverged by said first lens unit into a polarizing beam splitter while maintaining the predetermined divergence;introducing the light beam from said polarizing beam splitter to a concave mirror;returning the light beam from said concave mirror to said polarizing beam splitter;introducing the light beam returned to said polarizing beam splitter into a second lens unit which has positive refractive power; andcondensing, with said second lens unit, the light beam introduced therein to produce a reduced image of said reticle onto an exposure area of a wafer.