Patent ID: 7023521

Claim:
An exposure apparatus making a mask and a substrate move synchronously with respect to a projection optical system so as to transfer an image of a pattern formed on the mask onto the substrate, said exposure apparatus comprising: a sensor that detects positional information of the substrate in a direction of an optical axis of the projection optical system at a plurality of measurement points, an adjusting device, connected to said sensor, that adjusts a position of the substrate in the direction of the optical axis by focusing control and a tilt condition of the substrate by leveling control based on the detected result of said sensor, and a control switching device, connected to said adjusting device, that switches control while the image of the pattern is transferred onto the substrate so as to perform only said focusing control since a measurement point of the sensor is positioned inside an effective area of the substrate and so as to additionally perform leveling control when a plurality of measurement points that is less than all of the measurement points is positioned inside the effective area of the substrate.