Invention Application
US20070030948A1 Illumination system with field mirrors for producing uniform scanning energy 审中-公开
具有现场镜的照明系统,用于产生均匀的扫描能量

Illumination system with field mirrors for producing uniform scanning energy
Abstract:
This invention relates to an illumination system for scanning lithography especially for wavelengths ≦193 nm, particularly EUV lithography, for the illumination of a slit, comprising at least one field mirror or at least one field lens and being characterized in that at least one of the field mirror(s) or the field lens(es) has (have) an aspheric shape.
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