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    • 13. 发明申请
    • MIRROR FOR USE IN A MICROLITHOGRAPHY PROJECTION EXPOSURE APPARATUS
    • 用于微观投影曝光装置的镜子
    • WO2011032813A1
    • 2011-03-24
    • PCT/EP2010/062426
    • 2010-08-26
    • CARL ZEISS SMT GMBHROCKTAESCHEL, MartinENKISCH, HartmutSTICKEL, Franz-JosefNATT, OliverMANN, Hans-JürgenMIGURA, Sascha
    • ROCKTAESCHEL, MartinENKISCH, HartmutSTICKEL, Franz-JosefNATT, OliverMANN, Hans-JürgenMIGURA, Sascha
    • G02B5/08
    • G03F7/70958G02B5/0833G03F7/70191G03F7/70308G03F7/70316
    • The invention relates to a mirror for use in a microlithography projection exposure apparatus, comprising a substrate and a reflective coating, wherein the reflective coating itself in turn comprises a first group of layers and a second group of layers. In this case, the second group of layers is arranged between the substrate and the first group of layers. Furthermore, both the first group of layers and the second group of layers comprise a plurality of alternating first and second layers arranged one above another, wherein the first layers comprise a first material, the refractive index of which for radiation having a wavelength in the range of 5-30 nm is greater than the refractive index of a second material, which the second layers comprise. In this case, the first group of layers is configured in such a way that it comprises a number of layers that is greater than 20, such that, upon irradiation with radiation having a wavelength in the range of 5-30 nm, less than 20% of the radiation reaches the second group of layers, and wherein the second group of layers has a layer thickness variation for the correction of the surface form of the mirror. What is thereby achieved is that the second group of layers, which has a layer thickness variation for the correction of the surface form of the mirror, does not significantly affect the reflectivity properties of the mirror.
    • 本发明涉及一种用于微光刻投影曝光设备的反射镜,其包括基底和反射涂层,其中反射涂层本身又包括第一组层和第二组层。 在这种情况下,第二组层布置在衬底和第一组层之间。 此外,第一组层和第二组层都包括多个彼此排列的交替的第一和第二层,其中第一层包括第一材料,其第一材料的折射率用于具有在该范围内的波长的辐射 5-30nm的厚度大于第二层包含的第二材料的折射率。 在这种情况下,第一组层被配置成使得其包括大于20的多个层,使得当辐射具有5-30nm的波长的辐射时,小于20 辐射的百分比达到第二组层,并且其中第二组层具有用于校正反射镜的表面形式的层厚度变化。 由此实现的是,具有用于校正反射镜的表面形式的层厚度变化的第二组层不会显着影响反射镜的反射性质。