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Extreme ultraviolet multilayer mirror with near-zero IR reflectance

机译:具有近零红外反射率的极紫外多层镜

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We have developed a multilayer mirror for extreme ultraviolet (EUV) radiation that has low reflectance for IR radiation at 10.6 μmwavelength. The mirror is based on a multilayer coating comprising alternating layers of diamondlike carbon and silicon, for which we demonstrate an EUV reflectance of up to 49.7%. We have made a functional prototype in which the multilayer coating is included as part of an antireflection coating for IR radiation, resulting in reflectance values of 42.5% and 4.4% for EUV and IR, respectively. The mirror can replace a standard Mo/Si mirror in an EUV lithography tool to form an efficient solution for the suppression of unwanted CO2laser radiation.
机译:我们已经开发了一种用于极端紫外线(EUV)辐射的多层反射镜,该反射镜对于波长为10.6μm的红外辐射具有低反射率。镜子基于多层涂层,该多层涂层包括类金刚石碳和硅的交替层,为此我们证明其EUV反射率高达49.7%。我们制作了一个功能原型,其中将多层涂层作为用于IR辐射的抗反射涂层的一部分,因此EUV和IR的反射率分别为42.5%和4.4%。该反射镜可以替代EUV光刻工具中的标准Mo / Si反射镜,从而形成抑制有害CO2激光辐射的有效解决方案。

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