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

doi:10.1039/c1sm05083d

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

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

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 language	English
Pages (from-to)	5610-5614
Number of pages	5
Journal	Soft Matter
Volume	7
Issue number	12
DOIs	https://doi.org/10.1039/c1sm05083d
Publication status	Published - 2011 Jun 21

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics

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10.1039/c1sm05083d

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title = "Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography",

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.",

author = "Park, {Hong Gyu} and Lee, {Jong Jin} and Dong, {Ki Young} and Oh, {Byeong Yun} and Kim, {Young Hwan} and Jeong, {Hae Yoon} and Ju, {Byeong Kwon} and Seo, {Dae Shik}",

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T1 - Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography

AU - Park, Hong Gyu

AU - Lee, Jong Jin

AU - Dong, Ki Young

AU - Oh, Byeong Yun

AU - Kim, Young Hwan

AU - Jeong, Hae Yoon

AU - Ju, Byeong Kwon

AU - Seo, Dae Shik

PY - 2011/6/21

Y1 - 2011/6/21

N2 - 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.

AB - 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.

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

Abstract

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