TY - JOUR
T1 - Fabrication of extended porous polymer films for aligning nematic liquid crystal
AU - Kuboki, Masashi
AU - Fujikake, Hideo
AU - Murashige, Takeshi
AU - Sato, Hiroto
AU - Fujisaki, Yosihide
AU - Kawakita, Masahiro
AU - Kikuchi, Hiroshi
AU - Kurita, Taichiro
AU - Sato, Fumio
PY - 2004/4
Y1 - 2004/4
N2 - A method is proposed for fabricating extended porous polymer films for spatially aligning liquid crystals. By means of the successive biaxial extension method, polyolefin porous polymer films are extended to a great degree (10 μm thick, porosity 72.4%). After the porous polymer films are filled with nematic liquid crystals, a liquid crystal cell is fabricated by attaching glass substrates. The extension factor is 2.4 times and 6 times along the two orthogonal directions. As a result of observation by a polarization microscope, it is recognized that the liquid crystal molecules are aligned along the extension direction within the porous film. An optical modulation function using the birefringence of the liquid crystal is observed on application of a voltage. Unlike the conventional rubbing orientation process, the present scheme does not generate any static electricity or fine dust. Further, high-temperature baking of the alignment layer is not necessary. Orientation processing of liquid crystals is possible with the substrate maintained at room temperature.
AB - A method is proposed for fabricating extended porous polymer films for spatially aligning liquid crystals. By means of the successive biaxial extension method, polyolefin porous polymer films are extended to a great degree (10 μm thick, porosity 72.4%). After the porous polymer films are filled with nematic liquid crystals, a liquid crystal cell is fabricated by attaching glass substrates. The extension factor is 2.4 times and 6 times along the two orthogonal directions. As a result of observation by a polarization microscope, it is recognized that the liquid crystal molecules are aligned along the extension direction within the porous film. An optical modulation function using the birefringence of the liquid crystal is observed on application of a voltage. Unlike the conventional rubbing orientation process, the present scheme does not generate any static electricity or fine dust. Further, high-temperature baking of the alignment layer is not necessary. Orientation processing of liquid crystals is possible with the substrate maintained at room temperature.
KW - Extension
KW - Liquid crystal orientation
KW - Orientation anchoring force
KW - Porous polymer film
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U2 - 10.1002/ecjb.10164
DO - 10.1002/ecjb.10164
M3 - Article
AN - SCOPUS:1942504113
SN - 8756-663X
VL - 87
SP - 1
EP - 8
JO - Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
JF - Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
IS - 4
ER -