Conducting Polymer Substrates for Plastic Liquid Crystal Display.
KENT STATE UNIV OH LIQUID CRYSTAL INST
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In a conventional liquid crystal display device LCD, glass substrates coated with an indium tin oxide ITO layer are typically used for the application of an electric field to the liquid crystal material. For many applications, there is a need for a LCD with a plastic substrate. Polypyrrole is a well known conducting polymer for its high conductivity and chemical stability. Compared with the currently used ITO conducting layer, polypyrrole is more compatible mechanically with plastic. Because it is an organic material, it should be able to bend and flex with the substrate. Therefore, it is a good candidate for the conducting surface needed in a plastic LCD. Here we present the preparation of polypyrrole films on a polyethylene terephthalate PET substrate by an in-situ solution deposition process and their patterning by conventional photolithography techniques. We will discuss their important physical properties, such as surface resistance and optical transmission, and their suitability as a substitute for ITO as an electrode for a plastic reflective Ch-LCD.
- Polymer Chemistry
- Electrooptical and Optoelectronic Devices
- Properties of Metals and Alloys