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题名:
Fourier-based analysis of moire fringe patterns of superposed gratings in alignment of nanolithography
作者: Zhou, Shaolin1,2; Fu, Yongqi1; Tang, Xiaoping1; Hu, Song1; Chen, Wangfu1,2; Yang, Yong1,2
刊名: OPTICS EXPRESS
出版日期: 2008-05-26
卷号: 16, 期号:11, 页码:7869-7880
文章类型: Article
英文摘要: Considering the necessity of alignment in practical applications of photolithography, distribution of complex amplitude of moire fringe patterns that are produced in superposition of two gratings is analyzed in the viewpoint of Fourier Optics and the relationship between fringes and properties of these two gratings is concluded by means of an analysis model. The rule of one-dimensional gratings (1D-gratings) is extended to other form of the gratings which have quasi-periodic repetitive structures. Especially, moire fringes generated by the two superposed 1D-gratings (used in alignment of lithography) can be expressed by an arithmetical operation of two vectors which include enough information about these 1D-gratings. Numerical analyses regarding the moire model and its application in the alignment process of lithography are carried out. Our computational analyses results show that the moire fringes of the two extended gratings can be refined as a transformed fringe pattern of two standard 1D-gratings. Finally, the results also make it out that the fringes which have magnified periods versus that of two 1D-gratings are highly sensitive to relative shift of two gratings thus might be applicable in alignment of lithography or correlated fields. (C) 2008 Optical Society of America.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: NANOIMPRINT LITHOGRAPHY
收录类别: SCI
语种: 英语
WOS记录号: WOS:000256469900033
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3608
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Zhou, Shaolin,Fu, Yongqi,Tang, Xiaoping,et al. Fourier-based analysis of moire fringe patterns of superposed gratings in alignment of nanolithography[J]. OPTICS EXPRESS,2008,16(11):7869-7880.
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