Patent ID: 6160619
Filing Date: 2000-12-12
Classification: C08L,G02B,G03F

Abstract:
A projection exposure apparatus, comprising:a projection system for exposing an image of a pattern formed on a mask to a substrate;a substrate stage loaded with said substrate and disposed on an image plane side of the projection system to move on a two-dimensional plane;a mark detection system, disposed separately from said projection system, that detects a mark formed on said substrate stage or on said substrate;an interferometer system having a plurality of measuring longitudinal axes, that manages a position of two dimensional coordinates of said substrate stage;a moving mirror, disposed on said substrate stage, that is measured with respect to an amount of displacement from a reference position by said interferometer system; wherein:a relationship of a length Lm of said moving mirror with a diameter Dw of said substrate and a distance BL between a projection center of said projection system and a detection center of said mark detection system is established as:Lm<Dw+2BL,and said moving mirror is disposed so that in at least one position of said substrate stage, at least one of the measuring longitudinal axes does not intersect said moving mirror.