• Acta Optica Sinica
  • Vol. 42, Issue 13, 1305002 (2022)
Zinan Zhang1、2, Sikun Li1、2、*, Xiangzhao Wang1、2、**, and Wei Cheng1、2
Author Affiliations
  • 1Laboratory of Information Optics and Opto-Electronic Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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    DOI: 10.3788/AOS202242.1305002 Cite this Article Set citation alerts
    Zinan Zhang, Sikun Li, Xiangzhao Wang, Wei Cheng. Fast Mask Optimization Method for Extreme Ultraviolet Lithography[J]. Acta Optica Sinica, 2022, 42(13): 1305002 Copy Citation Text show less

    Abstract

    This paper proposes a fast pixelated mask optimization method for extreme ultraviolet lithography. An improved fast pixelated thick mask model is utilized in mask optimization. The point pulses on the edge pixels are set according to the mask pixel size. On the basis of the dual edge evolution strategy, the optimization variables are adaptively initialized in each epoch of optimization according to the difference between the current resist pattern contour and the target pattern contour. The optimization efficiency is improved by generating the initial individuals and population using priori information. One-dimensional line-space patterns and two-dimensional complex patterns are used for simulation. Simulation results show that the imaging simulation accuracy is effectively improved. In addition, the optimization efficiency of the two complex patterns is effectively increased by the proposed method.
    Zinan Zhang, Sikun Li, Xiangzhao Wang, Wei Cheng. Fast Mask Optimization Method for Extreme Ultraviolet Lithography[J]. Acta Optica Sinica, 2022, 42(13): 1305002
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