Patent ID: 8711323
Filing Date: 2014-04-29
Classification: G03F

Abstract:
1. An exposure apparatus comprising: a projection optical system to project a pattern of a reticle onto a substrate, said projection optical system including an optical element closest to the substrate; a liquid supply system to supply a liquid to a space between the optical element and the substrate, the liquid supply system comprising a liquid confinement member extending at least partly between the optical element and the substrate and spaced apart from and out of direct contact with the optical element, the liquid confinement member having: a temperature controller to control a temperature of the liquid, wherein (a) said temperature controller controls the temperature of the liquid based on temperature information at a plurality of locations on or adjacent (i) the substrate, or (ii) the optical element, or (iii) both (i) and (ii), or (b) a projection optical system compensator adjusts an optical property of the projection optical system based on temperature information at a plurality of locations on or adjacent (iv) the substrate, or (v) the optical element, or (vi) both (iv) and (v), or (c) both (a) and (b); and a stage to move the substrate relative to the optical element and the liquid confinement member.