Patent ID: 8564758
Filing Date: 2013-10-22
Classification: G03B,G03F

Abstract:
1. An exposure apparatus comprising: a projection optical system configured to project a pattern of a reticle onto a substrate; a map obtaining unit configured to obtain a pupil aberration map representing saturation values of fluctuations in an optical characteristic generated in a plurality of regions on a pupil plane of the projection optical system, upon irradiating each of the plurality of regions with a unit amount of light, wherein the saturation value is obtained for each of the plurality of regions; a distribution obtaining unit configured to obtain a light intensity distribution formed on the plurality of regions on the pupil plane of the projection optical system upon illuminating a pattern of an arbitrary reticle in an arbitrary illumination mode; a calculation unit configured to calculate a saturation value of a fluctuation in the optical characteristic generated in the projection optical system upon illuminating the pattern of the arbitrary reticle in the arbitrary illumination mode, by obtaining, a product of a light intensity in each region on the obtained light intensity distribution and the saturation value in each region on the pupil aberration map and by using a value obtained by adding each of obtained products; and an adjusting unit configured to adjust the projection optical system so as to decrease an amount of the fluctuation in the optical characteristic of the projection optical system, which is calculated from the saturation value of the fluctuation in the optical characteristic generated in the projection optical system, which is calculated by said calculation unit.