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Proceedings Paper

Parameters affecting pattern fidelity and line edge roughness under diffraction effects in optical maskless lithography using a digital micromirror device
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Paper Abstract

In optical maskless lithography in concern, a digital micromirror device plays the role of a digital mask. Due to the spatial/temporal configuration of micromirror arrays/response or the specification of illumination/projection optics, the irradiance may be influenced by diffraction effects. In present study, an investigation of various optical maskless lithography models based on binary micromirror reflections is performed in consideration of the diffraction effect. To evaluate lithographic parameters dissolved in the lithography models, parametric studies are performed focusing on pattern fidelity and line edge roughness. To reduce corner rounding phenomena due to an image size and further to a reflection criterion, the auxiliary corner reflection adjusting feature (ACRAF) analogous to conventional serif are employed and the effectiveness of ACRAFs is analyzed. The potential of utilizing the adjusted parameters for enhancing pattern fidelity and line edge roughness under diffraction effects is demonstrated through simulations and experiments.

Paper Details

Date Published: 26 November 2012
PDF: 11 pages
Proc. SPIE 8557, Optical Design and Testing V, 855724 (26 November 2012); doi: 10.1117/12.2000855
Show Author Affiliations
Manseung Seo, Tongmyong Univ. (Korea, Republic of)
Taehyoung Lee, Tongmyong Univ. (Korea, Republic of)
Haeryung Kim, Tongmyong Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 8557:
Optical Design and Testing V
Yongtian Wang; Chunlei Du; Hong Hua; Kimio Tatsuno; H. Paul Urbach, Editor(s)

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