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    • 3. 发明公开
    • Illumination system of a microlithographic projection exposure apparatus
    • 项目管理系统
    • EP2458425A1
    • 2012-05-30
    • EP12156900.8
    • 2007-10-01
    • Carl Zeiss SMT GmbH
    • Fiolka, DamianMaul, ManfredSchwab, MarkusSeitz, WolfgangDittmann, Olaf
    • G02B27/28G03F7/20G02B3/00
    • G03F7/70191G02B3/0056G02B5/1876G02B27/283G02B27/285G02B27/286G03F7/70566
    • The invention relates to an illumination system of a microlithographic projection exposure apparatus. An illumination system of a microlithographic projection exposure apparatus comprises a depolariser (500-900) which in conjunction with a light mixing system disposed downstream in the light propagation direction at least partially causes effective depolarisation of polarised light impinging on the depolariser (500-900), and a microlens array (20) which is arranged upstream of the light mixing system in the light propagation direction and in which a plurality of microlenses (20a, 20b,...) are arranged with a periodicity; wherein the depolariser (500-900) is so adapted that in a plane perpendicular to the optical system axis of the illumination system it produces mutually orthogonal polarisation states whose distribution within the optically effective region does not involve any periodicity, and that a contribution afforded by interaction of the depolariser (500-900) on the one hand with the periodicity of the microlens array (20) on the other hand to the residual polarisation distribution occurring in a pupil plane (PP) arranged downstream of the microlens array (20) in the light propagation direction has a maximum degree of polarisation of not more than 5%.
    • 本发明涉及一种微光刻投影曝光装置的照明系统。 微光刻投影曝光装置的照明系统包括去极化器(500-900),其与在光传播方向上设置的下游的光混合系统一起至少部分地引起入射去极化器(500-900)的偏振光的有效去极化, 以及微透镜阵列(20),其布置在光传播方向上的光混合系统的上游,并且多个微透镜(20a,20b,...)以周期性布置; 其中去极化器(500-900)适于使得在垂直于照明系统的光学系统轴的平面中,其产生相互正交的极化状态,其在光学有效区域内的分布不涉及任何周期性,并且由 另一方面,去极化剂(500-900)与微透镜阵列(20)的周期性的相互作用与发生在布置在微透镜阵列(20)下游的光瞳平面(PP)中的残留极化分布相互作用 光传播方向的最大极化度不大于5%。