Patent ID: 7629563

Claim:
A method for adjusting a first light intensity distribution formed on a pupil plane of an illumination apparatus configured to illuminate a mask for projecting a pattern of the mask on a substrate to a light intensity distribution substantially equivalent to a targeted second light intensity distribution, the method comprising: measuring the first light intensity distribution; obtaining a first light intensity radial distribution by integrating a light intensity of each point in an area in the measured first light intensity distribution in a circumferential direction with respect to a predetermined central point and a second light intensity radial distribution by integrating a light intensity of each point in an area in the second light intensity distribution in the circumferential direction with respect to a predetermined central point; obtaining a first cumulative light quantity distribution in a radial direction by integrating the first light intensity radial distribution in the radial direction with respect to the central point and a second cumulative light quantity distribution in the radial direction by integrating the second light intensity radial distribution in the radial direction with respect to the central point; obtaining a difference at each of at least three points between the first cumulative light quantity distribution and the second cumulative light quantity distribution; and adjusting the first light intensity distribution based on the difference between the first cumulative light quantity distribution and the second cumulative light quantity distribution; and adjusting the first light intensity distribution based on the difference between the first cumulative light quantity distribution and the second cumulative light quantity distribution.