Patent ID: 7158215
Filing Date: 2007-01-02
Classification: G02B,G03B,G03F

Abstract:
1. An exposure system, comprising: a reticle stage adapted to support a reticle that is configured to pattern a beam of radiation; a substrate stage adapted to support a substrate; a reflective optical system adapted to direct the patterned beam onto said substrate, said reflective optical system comprising a primary mirror including a first mirror and a second mirror, and a secondary mirror; a first optical device including a parallel glass plate, a parallel glass plate and meniscus lens pair, a nominally flat mirror with an aspheric profile, or a powered mirror located between the reticle stage and the primary mirror; and a second optical device including a parallel glass plate, a parallel glass plate and meniscus lens pair, a nominally flat mirror with an aspheric profile, or a powered mirror located between the substrate stage and the primary mirror.