Title :
High-resolution full-color LCD driven by OTFTs using novel passivation film
Author :
Kawasaki, Masahiro ; Imazeki, Shuji ; Ando, Masahiko ; Sekiguchi, Yoshifumi ; Hirota, Shoichi ; Uemura, Sei ; Kamata, Toshihide
Author_Institution :
Adv. Res. Lab., Hitachi Ltd., Ibaraki, Japan
fDate :
3/1/2006 12:00:00 AM
Abstract :
A full-color twisted-nematic type liquid crystal display (TN-LCD) of 1.4-in diagonal size driven by organic thin-film transistors (TFTs) has been fabricated. This TN-LCD has 80×80×3 (RGB) pixel arrays addressed by pentacene TFTs with a channel width of 50 μm. The contact resistance between the pentacene film and the source/drain electrodes has been reduced by selecting the exposure condition of the photoresist in patterning the electrodes. In addition, a solution-processed passivation film with a novel structure, consisting of photosensitive polyvinylalcohol and organosiloxane glass resin, has been developed to protect the TFTs against degradation induced by integration with TN-LCD devices. Consequently, it has been confirmed that the organic-TFT-driven TN-LCD fabricated in this paper is capable of displaying full-color moving images at a resolution of 80 pixels per inch.
Keywords :
contact resistance; driver circuits; liquid crystal displays; nematic liquid crystals; organic compounds; passivation; thin film transistors; 1.4 in; 50 micron; contact resistance; full-color moving images; organic thin-film transistors; organosiloxane glass resin; passivation film; pentacene film; photoresist; photosensitive polyviny-lalcohol; twisted-nematic type liquid crystal display; Contact resistance; Electrodes; Glass; Liquid crystal displays; Organic thin film transistors; Passivation; Pentacene; Resins; Resists; Thin film transistors; Liquid crystal displays (LCDs); organic; passivation; pentacene; thin-film transistors (TFTs);
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2005.864371
