Patent ID: 7083290
Filing Date: 2006-08-01
Classification: B82Y,G02B,G03F,G21K

Abstract:
1. An adjusting method for adjusting an optical system that has a multilayer mirror that includes a multilayer film using an EUV light, said adjusting method comprising: a first step for measuring a wave front aberration of the optical system using the EUV light; a second step for measuring a wave front aberration of the optical system using a non-exposure light having a wavelength different from that of the EUV light; a third step for removing a part of the multilayer film based on a measurement result in said first step; a fourth step for measuring a wave front aberration of the optical system that includes the multilayer mirror from which the part of the multilayer film is removed, using the non-exposure light; and a fifth step for adjusting a position of the muitilayer mirror based on a measurement result in said fourth step, wherein said fourth step measures the wave front aberration of the optical system except an area in which the multilayer film is removed among the multilayer mirror.