Patent ID: 6693700
Filing Date: 2004-02-17
Classification: G03F

Abstract:
A scanning projection exposure apparatus, which has a first movable stage which moves with a first object being placed thereon, and a second movable stage which moves with a second object being placed thereof, scans the first and second movable stages in synchronism with each other with respect to a projection optical system, and projects a pattern formed on the first object onto the second object through the projection optical system, said apparatus comprising:a reference plate, fixed to the first movable stage and having marks formed thereon in a direction perpendicular to the scanning direction, which is a reference for measuring deformation of the first object occurring due to exposure of the first object to exposure light; marks, which are formed in a direction perpendicular to the scanning direction on the first object, for measuring the deformation; and a detection system for detecting a position of the marks formed on said reference plate and a position of the marks formed on the first object, wherein a deformation amount of the first object is obtained based on the position of the marks formed on the first object with respect to a reference position serving as the position of the marks formed on the reference plate, which are detected by said detection system.