Patent ID: 6606144
Filing Date: 2003-08-12
Classification: G02B,G03F

Abstract:
A projection exposure apparatus for projecting a pattern on a projection master onto a workpiece to effect exposure thereof, comprising:an illumination optical system for supplying exposure light of a wavelength of not more than 200 nm to said projection master; and a projection optical system for forming an image of the pattern on said projection master, at a predetermined projection magnification &bgr; on said workpiece; wherein said projection optical system comprises an aperture stop, a front lens unit located between the aperture stop and said projection master, and a rear lens unit located between said aperture stop and said workpiece, wherein, where y (kg) represents a translated amount of fluorite of a disk member from an amount of fluorite among light-transmitting optical materials in said projection optical system, f2 (mm) is a focal length of said rear lens unit, and NAw is a maximum numerical aperture on the image said of said projection optical system, and where x is defined as follows: x=f2Â·4|&bgr;|Â·NAw2; the following conditions are satisfied:y&lE;4xâˆ’200, y&lE;(4x/13)+(1000/13), y&gE;4xâˆ’440, andy&gE;0.