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High-resolution full-color LCD driven by OTFTs using novel passivation film

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7 Author(s)
M. Kawasaki ; Adv. Res. Lab., Hitachi Ltd., Ibaraki, Japan ; S. Imazeki ; M. Ando ; Y. Sekiguchi
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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.

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IEEE Transactions on Electron Devices  (Volume:53 ,  Issue: 3 )