Patent ID: 7173759
Filing Date: 2007-02-06
Classification: B82Y,G02B,G21K

Abstract:
1. A monochromator mirror for the EUV spectral range having a layer arrangement applied to a substrate and which has a sequence of individual layers, wherein the layer arrangement has a periodic sequence of two individual layers A and B of different materials forming one period with the period thickness d and having the particular layer thickness d A and d B , so that the following applies: wherein n A and n B are the real parts of the complex refractive indices of the materials of the individual layers A and B, m is a whole number representing the order of Bragg reflection greater than or equal to 2 and λ is the wavelength of the incident radiation and θ is the angle of incidence of the incident radiation, and wherein also the following applies for the layer thickness ratio ┌=d A /d: and wherein the reduction of the half width of mirror reflection when using a Bragg reflection of the 2