MAINTENANCE METHOD, EXPOSURE METHOD, EXPOSURE APPARATUS, AND DEVICE PRODUCING METHOD

摘要

An exposure apparatus irradiates an exposure light beam EL in a state that a space KS, between predetermined optical elements LS1 and LS2 among a plurality of optical elements included in a projection optical system, is filled with a liquid LQ. When the exposure light beam EL is not irradiated during, for example, the maintenance or the like, the liquid LQ in the space KS is substituted by a functional fluid LK different from the liquid LQ. This makes it possible to reduce any influence exerted by the liquid LQ on the exposure apparatus.