Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography

Hong Gyu Park, Jong Jin Lee, Ki Young Dong, Byeong Yun Oh, Young Hwan Kim, Hae Yoon Jeong, Byeong Kwon Ju, Dae Shik Seo

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Abstract

In this paper, nanoimprint lithography was utilized to transfer a nano-pattern (NP) onto a homeotropic polyimide (PI) surface for use in liquid crystal displays (LCDs). The nano-patterned silicon mold was fabricated by laser interference lithography. A NP PI layer acted as the homeotropic alignment layer to easily and uniformly align the liquid crystal (LC) molecules. A NP LC cell with a NP PI layer was successfully operated as a vertical aligned LCD, and its performance was evaluated. The threshold voltage and response time of the NP LC cell were 2.472 V and 22.7 ms, respectively. In addition, the NP LC cell was characterized by a high thermal budget. Therefore, the competitive performance of the NP LC cell could allow new approaches to replace the conventional rubbing process in display technology.

Original languageEnglish
Pages (from-to)5610-5614
Number of pages5
JournalSoft Matter
Volume7
Issue number12
DOIs
Publication statusPublished - 2011 Jun 21

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Park, H. G., Lee, J. J., Dong, K. Y., Oh, B. Y., Kim, Y. H., Jeong, H. Y., Ju, B. K., & Seo, D. S. (2011). Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography. Soft Matter, 7(12), 5610-5614. https://doi.org/10.1039/c1sm05083d