Patent ID: 7164464
Filing Date: 2007-01-16
Classification: G03B,G03F

Abstract:
1. An exposure apparatus for exposing a wafer to light through a pattern of a mask, said apparatus comprising: a light source configured to generate the light; a projection optical system configured to project the pattern onto the wafer; a barometer configured to measure pressure of an atmosphere in said apparatus; a lens driving unit configured to drive a lens included in said projection optical system; a wavelength changing unit configured to change a wavelength of the light; and an instruction unit configured to instruct said lens driving unit to drive said lens in an exposure state of said apparatus based on a signal output by said barometer, configured to instruct said wavelength changing unit to change the wavelength only in a non-exposure state of said apparatus based on the signal, and configured to instruct said lens driving unit to initialize a position of said lens in association with the change of the wavelength.