Patent ID: 6198527
Filing Date: 2001-03-06
Classification: G03B,G03F

Abstract:
An exposure apparatus for exposing a pattern of a mask on a sensitive substrate, said apparatus comprising:a mask stage which holds said mask;a movable substrate stage which holds said sensitive substrate;a projection optical system which is arranged between said mask stage and said movable substrate stage, and which images said mask pattern at a predetermined position on said sensitive substrate;a first mark detecting system which detects a substrate mark formed on said sensitive substrate in a detection area positioned at a predetermined interval from an optical axis of said projection optical system;a second mark detecting system which detects a mask mark formed at a predetermined position on said mask in the image field of said projection optical system;a first fiducial mark member arranged on a part of said substrate stage, and which has a configuration capable of being detected by said first mark detecting system;a second fiducial mark member arranged on a part of said substrate stage, and which has a configuration capable of being detected by said second mark detecting system through said projection optical system;a fiducial plate which mounts said first fiducial mark member and said second fiducial mark member with a predetermined positional relationship so that said first fiducial mark member is positioned in the detection area of said first mark detecting system when said second fiducial mark member is positioned in a predetermined relationship with respect to a position where said mask mark is to be present in the image field of said projection optical system;a substrate stage position measuring system which measures a position of said substrate stage; anda stage control system which is electrically connected to said substrate stage position measuring system, and which moves said substrate stage based on a coordinate system obtained by correcting a coordinate axis of said substrate stage position measuring system by an amount corresponding to a rotation error defined as an inclination of said fiducial plate with respect to said coordinate axis.