Patent ID: 6310680
Filing Date: 2001-10-30
Classification: G03F

Abstract:
A scanning exposure apparatus for transferring, via a projecting optical system, an image of a pattern formed on a mask onto a substrate while synchronously moving both said mask and said substrate with respect to illumination light generated by a light source, said scanning exposure apparatus comprising:an illuminating optical system having optical elements that define an illumination area of said illumination light generated by said light source when the exposure apparatus is operating in a scanning exposure mode;a controller coupled to the illuminating optical system that changes the optical elements of said illuminating optical system so that said illumination area of the illumination light is set to have a different area depending on whether the scanning exposure apparatus is operating in a measurement mode or in the scanning exposure mode; andan adjustment system coupled to the controller that adjusts said projecting optical system in accordance with a result of a measurement performed on an area different from the illumination area used in the scanning exposure mode, while in the measurement mode.