Patent ID: 6707536
Filing Date: 2004-03-16
Classification: G03F

Abstract:
A scanning exposure apparatus which exposes a substrate by moving a mask and the substrate, the apparatus comprising:a projection unit; a stage system having a first stage on which one of the mask and the substrate is held, a second stage on which the other is held, a first driving system for the first stage, and a second driving system for the second stage, the first stage and the second stage being moved in respective scanning directions, the first stage being moved at a first scanning speed during scanning exposure, the second stage being moved at a second scenning speed during the scanning exposure, the first scanning speed being different from the second scanning speed in accordance with a projecting magnification of the projection unit; an interferomter system having a first interferometer which monitors the first stage and a second interferometer which monitors the second stage, each of the first and second stages having a measurement surface used for the first and second interferometers, respectively; a first reference mirror provided on the projection unit, the first reference mirror being used for the first interferometer; and a second reference mirror provided on the projection unit, the second reference mirror being used for the second interferometer; and a controller associated with the stage system and the interferometer system, the first stage being moved in accordance with a deviation, obtained by using the interferometer system, between the first stage and the second stage in a direction other than the scanning direction during the scanning exposure.