Patent ID: 6381004
Filing Date: 2002-04-30
Classification: G03B,G03F

Abstract:
An exposure apparatus which relatively scans a mask and a substrate with respect to a projection optical system while said mask having a pattern formed is illuminated with an illumination light to transfer said pattern onto at least one shot area on said substrate via said projection optical system, said exposure apparatus comprising:a focus detection system which detects positional information on said substrate surface in an optical axis direction of said projection optical system at a plurality of detection points; a selection unit capable to set a selection criteria and select detection points according to said selection criteria, said selection criteria including a first type detection point selection criteria to control a tilt of said substrate in a moving direction and a tilt of said substrate in a direction perpendicular to said moving direction, said moving direction being a first direction whereas said direction perpendicular being a second direction, and a second type detection point selection criteria to control said tilt of said substrate with priority on said second direction; and a substrate driving unit which controls a position of said substrate in said optical axis direction and a tilt with respect to a surface perpendicular to said optical axis to adjust a positional relationship between said substrate surface within an illumination area and an image plane of said projection optical system based on positional information of said substrate surface in an optical axis direction of said projection optical system at said detection points selected.