Patent ID: 8741510

Claim:
A method of fabricating a device, the method comprising the steps of: exposing a substrate to light using an exposure apparatus and by controlling an imaging characteristic of a projection optical system; and developing the substrate having been exposed to the light wherein the exposure apparatus comprises an illumination optical system that illuminates a mask using the light from a light source; the projection optical system that projects an image of a pattern of the mask onto the substrate; a storage unit that stores an exposure coefficient for a first wavelength band of exposure light and an exposure coefficient for a second wavelength band of the exposure light, the second wavelength band being different from the first wavelength band, the substrate being exposed to the exposure light, each exposure coefficient being defined as an amount of fluctuation of an imaging characteristic of the projection optical system per unit of exposure energy; and a calculation unit that calculates the amount of fluctuation of the imaging characteristic of the projection optical system, wherein the storage unit stores the exposure coefficients for the first and second wavelength bands, the exposure coefficient for the first wavelength band is calculated using data of the amount of fluctuation of the imaging characteristic of the projection optical system in a case where the exposure light is light of the first wavelength band, and the exposure coefficient for the second wavelength band is calculated using the exposure coefficient for the first wavelength band, and wherein the calculation unit calculates the amount of fluctuation of the imaging characteristic of the projection optical system using the exposure coefficient for the second wavelength band in a case where the substrate is exposed to exposure light of the second wavelength band.