Patent ID: 8582083
Filing Date: 2013-11-12
Classification: G03F

Abstract:
1. In an exposure apparatus including an illumination optical system which illuminates an original with light from a light source, and a projection optical system which projects a pattern of the original onto a substrate, a method of generating a database of effective light source distributions formed in the illumination optical system, the method comprising: a generation step of calculating effective light source distributions while changing a plurality of conditions settable for the illumination optical system, and generating an initial database including the calculated effective light source distributions corresponding to the plurality of conditions; a measurement step of setting a first condition of the plurality of conditions for the illumination optical system, and measuring an effective light source distribution corresponding to the first condition; a calculation step of calculating, based on a difference amount between the measured effective light source distribution, and the calculated effective light source distribution corresponding to the first condition included in the initial database, a difference function representing difference amounts of the calculated effective light source distributions corresponding to conditions different from the first condition included in the initial database, the difference function being a function of a condition settable for the illumination optical system; and a correction step of correcting the calculated effective light source distribution corresponding to each of the plurality of conditions including the conditions different from the first condition included in the initial database using the difference function, and compiling the corrected effective light source distribution into an actual database.