Patent ID: 7477356
Filing Date: 2009-01-13
Classification: G03F

Abstract:
1. An exposure apparatus for performing exposure of an object to light, said apparatus comprising: a measuring device configured to measure a wavelength spectrum of the light; a processor configured to calculate a center wavelength of light based on the measured wavelength spectrum; and a main controller configured to determine whether the exposure is to be performed, based on the calculated center wavelength of the light, wherein the wavelength spectrum includes a first spectral component and a second spectral component, and said processor is configured to calculate the center wavelength of the light λ where λ 0 - 1 is a center wavelength of the first spectral component, λ 0 - 2 (λ 0 - 2 >λ 0 - 1 ) is a center wavelength of the second spectral component, Energy- 1 is a peak light intensity of the first spectral component, Energy- 2 is a peak light intensity of the second spectral component, and Δλ=λ 0 - 2 −λ 0 - 1 .