Browsing by Author "Cheng, Horng-Long"

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Analysis of pentacene thin film transistors in different atmospheres
(2005)
Wang, Yu-Wu
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Cheng, Horng-Long
;
Wang, Yi-Kai
;
Hu, Tang-Hsiang
;
Ho, Jia-Chong
This investigation addresses the electrical properties of pentacene-based thin film transistors in air, dry air and high vacuum. A potential barrier model was applied to explain the gate dependent field effect mobility behavior. The results show the trap density in air higher than that in a vacuum.
Innovative plasma alignment method in flexible liquid crystal display films
(2007)
Liu, Kang-Hung
;
Lee, Chin-Yang
;
Ho, Cheng-Ta
;
Cheng, Horng-Long
;
Lin, Shih-Ting
Liquid crystals (LCs) in flexible cell were aligned on polyimide (PI) surface treated by a paperlike plasma beam. The beam had energy of 450 eV and incident angle of 70 with respect to normal flexible indium-zinc oxide-coated substrate. The pretilt angle and anchoring energy of LCs on plasma-aligned PI surface were almost identical to the angle and energy of the rubbing PI. However, optical performance of the plasma-aligned cell was superior to the rubbing cell under various bending conditions. Furthermore, such noncontact alignment technology is suitable for large area and roll-to-roll fabrication of flexible LC films. (c) 2007 The Electrochemical Society.