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    • 5. 发明申请
    • PROJECTION OBJECTIVE OF A MICROLITHOGRAPHIC PROJECTION EXPOSURE APPARATUS
    • 微波投影曝光装置的投影目标
    • US20080316455A1
    • 2008-12-25
    • US12180218
    • 2008-07-25
    • Dirk HellwegHeiko Feldmann
    • Dirk HellwegHeiko Feldmann
    • G03B27/54G02B9/00
    • G03F7/70316
    • The disclosure relates a projection objective of a microlithographic projection exposure apparatus. In some embodiments, the apparatus is configured to project a mask which can positioned in an object plane onto a light-sensitive layer which can be positioned in an image plane. The projection objective can include a last optical element at the image plane side having a light entrance surface and a light exit surface. The projection objective can also include an immersion liquid is arranged in a region between the light exit surface and the image plane. At a working wavelength of the projection objective, the immersion liquid can have a refractive index of at least 1.5. At least one interface between the light entrance surface of the last optical element at the image plane side and the immersion liquid can have at least region-wise a microstructuring.
    • 本公开涉及微光刻投影曝光装置的投影物镜。 在一些实施例中,该装置被配置为将可以定位在物平面中的掩模投影到可定位在图像平面中的光敏层上。 投影物镜可以包括在具有光入射表面和光出射表面的图像平面侧上的最后一个光学元件。 投影物镜还可以包括在光出射表面和图像平面之间的区域中设置浸没液体。 在投影物镜的工作波长下,浸没液体的折射率可以至少为1.5。 在图像平面侧的最后一个光学元件的光入射表面与浸没液体之间的至少一个界面可以至少具有区域性的微结构化。