Patent ID: 6535272
Filing Date: 2003-03-18
Classification: G03F

Abstract:
An exposure apparatus comprising:a substrate stage which holds a substrate including an alignment mark formed thereon; a main body portion which transfers a predetermined pattern onto said substrate; a position detection system; and an alignment device which is electrically connected to the position detection system, said position detection system including: a first light source which generates a first detection beam having a first wavelength; a second light source which generates a second detection beam having a second wavelength different from said first wavelength; an illumination system arranged between said light source and said substrate stage, which irradiates the first detection beam or the second detection beam onto the alignment mark formed on the substrate; a light recipient portion which receives a beam generated from the alignment mark and detects positional information of the mark; a plurality of first optical fibers arranged between said substrate stage and said light recipient portion, which form a part of a path for leading a plurality of interference lights formed by a plurality of pairs of diffraction lights generated from said alignment mark illuminated by said first detection beam onto the light recipient portion, said plurality of first optical fibers being provided correspondingly to each of said plurality of interference lights and having a propagation efficiency thereof optimized to said first wavelength; and a plurality of second optical fibers which are independent of said first optical fibers, which are arranged between said substrate stage and said light recipient portion, which form a part of a path for leading a plurality of interference lights formed by a plurality of pairs of diffraction lights generated from said alignment mark illuminated by said second detection beam onto said light recipient portion, said plurality of second optical fibers being provided correspondingly to each of said plurality of interference lights and having a propagation efficiency thereof optimized to said second wavelength, said alignment device being adapted to perform an alignment operation of said substrate, based on the positional information detected by said light recipient system.