Conducting polymer substrates for plastic liquid crystal display

Ling Huang; Catherine Elizabeth O'Ferrall; Terrance Vargo; Ranganathan Shashidhar; William J. Fritz; Steven W. Smith; Richard Hewitt; J. William Doane

doi:10.1117/12.271390

11 April 1997 Conducting polymer substrates for plastic liquid crystal display

Ling Huang, Catherine Elizabeth O'Ferrall, Terrance Vargo, Ranganathan Shashidhar, William J. Fritz, Steven W. Smith, Richard Hewitt, J. William Doane

Author Affiliations +

Proceedings Volume 3015, Liquid Crystal Materials, Devices, and Applications V; (1997) https://doi.org/10.1117/12.271390
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

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 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.

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Ling Huang, Catherine Elizabeth O'Ferrall, Terrance Vargo, Ranganathan Shashidhar, William J. Fritz, Steven W. Smith, Richard Hewitt, and J. William Doane "Conducting polymer substrates for plastic liquid crystal display", Proc. SPIE 3015, Liquid Crystal Materials, Devices, and Applications V, (11 April 1997); https://doi.org/10.1117/12.271390

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KEYWORDS

LCDs

Polymers

Electrodes

Optical lithography

Reflectivity

Photoresist materials

Transmittance

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