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Active lens for thermal aberration compensation in lithography lens

机译:用于光刻透镜的热像差补偿的有源镜头

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摘要

High laser absorption and strong resolution enhancement technology make thermal aberration control of lithography lenses more challenging. We present an active lens that uses four bellows actuators to generate astigmatism (Z5) on the lens surface. The apparatus utilizes optical path difference to compensate the system wavefront. In order to assess the specifications of the compensator, the finite element method and experimental analyses are carried out to obtain and validate the general properties of the apparatus. The results show that the Z5 deformation quantity of lens's upper surface exceeds 600 nm; further, Z5 coefficient accuracy is better than +/- 1 nm. The apparatus can be an efficient compensator for thermal aberration compensation, especially aberration caused by the dipole illumination. (C) 2018 Optical Society of America
机译:高激光吸收和强度分辨率增强技术使光刻镜头的热像差控制更具挑战性。 我们提出了一种有源镜头,它使用四个波纹管致动器在镜片表面上产生散光(Z5)。 该装置利用光路径来补偿系统波前。 为了评估补偿器的规格,进行有限元方法和实验分析以获得和验证装置的一般性质。 结果表明,透镜上表面的Z5变形量超过600nm; 此外,Z5系数精度优于+/- 1nm。 该装置可以是用于热像差补偿的有效补偿器,尤其是由偶极照明引起的像差。 (c)2018年光学学会

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  • 来源
    《Applied optics》 |2018年第29期|共10页
  • 作者单位

    Chinese Acad Sci Changchun Inst Opt Fine Mech &

    Phys Changchun 130033 Jilin Peoples R China;

    Chinese Acad Sci Changchun Inst Opt Fine Mech &

    Phys Changchun 130033 Jilin Peoples R China;

    Chinese Acad Sci Changchun Inst Opt Fine Mech &

    Phys Changchun 130033 Jilin Peoples R China;

    Chinese Acad Sci Changchun Inst Opt Fine Mech &

    Phys Changchun 130033 Jilin Peoples R China;

    Chinese Acad Sci Changchun Inst Opt Fine Mech &

    Phys Changchun 130033 Jilin Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用;
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