Patent ID: 7056627
Filing Date: 2006-06-06
Classification: B82Y,C03C,G03F

Abstract:
1. A method of manufacturing a reflection type mask blank by forming a multilayer reflection film reflecting exposure light on a substrate and forming an absorber layer absorbing the exposure light on the multilayer reflection film, the method comprising: a step of forming, between the substrate and the multilayer reflection film, on the multilayer reflection film, or both between the substrate and the multilayer reflection film and on the multilayer reflection film, a stress correction film having film stress opposite in direction to film stress of the multilayer reflection film and smaller in absolute value than the film stress of the multilayer reflection film; a step of heat-treating the stress correction film at a temperature higher than a deposition temperature of the stress correction film; and a step of heat-treating the multilayer reflection film at a temperature higher than the deposition temperature of the stress correction film, wherein the reflection multilayer film is made of a material selected so that the film stress is reduced by the heat treating step, the stress correction film is made of a material selected so that the stress is increased by the heat treating step, and the heat treating step is carried out at a heating temperature at which the film stress of the reflection multilayer film is cancelled by variation of the film stress of the stress correction film.