Patent ID: 7330236
Filing Date: 2008-02-12
Classification: G03F

Abstract:
1. An exposure apparatus, comprising: an illumination optical system for illuminating a reticle with extreme ultraviolet light; a projection optical system having a plurality of reflective optical elements, for directing light from the reticle to an object to be exposed; a chamber for surrounding a light path from the reticle to the object to be exposed; a cold trap plate provided in said chamber; a plate cooling device connected to said cold trap plate and configured to cool said cold trap plate to a temperature not greater than 200 K; a radiation shield member configured to be disposed between said cold trap plate and at least one of said plurality of reflective optical elements and to prevent radiation cooling of said at least one reflective optical element by said cold trap plate and a gas supplying device configured to supply a gas, through a gas supply port, to a space which is at a reflection surface side of said at least one reflective optical element that reflects the extreme ultraviolet light and which space is between said at least one reflective optical element and said radiation shield member; wherein said gas supply port is provided at said radiation shield member.