Acta Optica Sinica, Volume. 38, Issue 7, 0712004(2018)
High-Order Aberration Measurement Technique for Immersion Lithography Projection Lens Based on Multi-Polarized illuminations
A high-order aberration measurement technique for immersion lithography projection lens based on multi-polarized illuminations is proposed. Aerial images of different polarized illuminations are collected by linear sampling, and the measurement model is built quickly based on principle component analysis; the high-order aberration of the immersion lithography projection lens is measured accurately. Compared with the high-order aberration measurement method based on a test target with eight angles, the proposed technique can reduce the number of samples, improve the efficiency of sampling, and speed up modeling. The lithographic simulator PROLITH is used to validate the proposed technique and analyze the influence of the illumination types on the accuracy of the high-order aberration measurement. The results show that the proposed technique can retrieve 60 terms of Zernike coefficients (Z5-Z64) with measurement accuracy better than 1.03×10 -3λ, and its modeling speed is improved by about 30 times.
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Boer Zhu, Sikun Li, Xiangzhao Wang, Fengzhao Dai, Feng Tang, Lifeng Duan. High-Order Aberration Measurement Technique for Immersion Lithography Projection Lens Based on Multi-Polarized illuminations[J]. Acta Optica Sinica, 2018, 38(7): 0712004
Category: Instrumentation, Measurement and Metrology
Received: Jan. 24, 2018
Accepted: --
Published Online: Sep. 5, 2018
The Author Email: Li Sikun (lisikun@siom.ac.cn)