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Digital lithography technique is a promising tool for the fabrication of binary optical element. In this paper, we present the mask-division technique to improve the lithography quality. A piece of high-frequency mask is divided into several pieces of low-frequency binary masks. Then they are imaged on the photoresist successively by using the DMD-based lithography system. Based on the theory of partial coherent light, the intensity distribution in image plane has been simulated. The grating masks with period of 4 žm have been fabricated by using the mask-division technique. Experimental results demonstrate the feasibility of the proposed method as an effective technique for advancing the edge sharpness.
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Tom
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239--248
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Bibliogr. 11 poz.
Bibliografia
- [1] TAKAHASHI K., SETOYAMA J., An UV-exposure system using DMD, Transactions of the Institute of Electronics, Information and Communication Engineers J82-C-2(3), 1999, pp. 92–94 (in Japanese).
- [2] KIN FOONG CHAN, ZHIQIANG FENG, REN YANG, AKIHITO ISHIKAWA, AND WENHUI MEI, High-resolution maskless lithography, Journal of Microlithography, Microfabrication, and Microsystems 2(4), 2003,
- [3] LIANG YIYONG, YANG GUOGUANG, Linewidth control by overexposure in laser lithography, Optica Applicata 38(2), 2008, pp. 399–404.
- [4] PENG QINJUN, GUO YONGKANG, ZENG YANGSU, LIU SHIJIE, CHEN BO, XIAO XIAO, Real-time grey-tone mask technique for fabrication of microlens array, Chinese Journal of Lasers 30(10), 2003, pp. 893–896.
- [5] SHEN TINGZHENG, LV HAIBAO, GAO YIQING, QI XINMIN, LUO NINGNING, Research of mask division for improving the edge sharpness of photolithography, Acta Optica Sinica 25(4), 2005, pp. 533–537.
- [6] YIQING GAO, TINGZHENG SHEN, JINSONG CHEN, NINGNING LUO, XINMIN QI, QI JIN, Research on high-quality projecting reduction lithography system based on digital mask technique, Optik 116(7), 2005, pp. 303–310.
- [7] XIAOWEI GUO, JINGLEI DU, YONGKANG GUO, CHUNLEI DU, ZHENG CUI, JUN YAO, Simulation of DOE fabrication using DMD-based grey-tone lithography, Microelectronic Engineering 83(4–9), 2006, pp. 1012–1016.
- [8] MANSEUNG SEO, HAERYUNG KIM, Lithography upon micromirrors, CAD Computer Aided Design 39(3), 2007, pp. 202–217.
- [9] BEASLEY B.D., BENDER M.W., CROSBY J., MESSER T., SAYLOR D.A., Advancements in the micromirror array projector technology, Proceedings of SPIE 5092, 2003, pp. 71–82.
- [10] KIN FOONG CHAN, ZHIQIANG FENG, REN YANG, WENHUI MEI, High-resolution maskless lithography by the integration of micro-optics and point array technique, Proceedings of SPIE 4985, 2003, pp. 37–43.
- [11] ERDMANN L.H., DEPARNAY A., WIRTH F., BRUNNER R., MEMS-based lithography for the fabrication of micro-optical components, Proceedings of SPIE 5347, 2004, pp. 79–84.
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Bibliografia
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bwmeta1.element.baztech-article-BPW7-0012-0144