Patterns of electrically conducting polymers and their application as electrodes or electrical contacts

Abstract

Electronic devices having patterned electrically conductive polymers providing electrical connection thereto and methods of fabrication thereof are described. Liquid crystal display cells are described having at least one of the electrodes providing a bias across the liquid crystal material formed from a patterned electrically conductive polymer. Thin film transistors having patterned electrically conductive polymers as source drain and gate electrodes are described. Light emitting diodes having anode and coated regions formed from patterned electrically conductive polymers are described. Methods of patterning using a resist mask; patterning using a patterned metal layer, patterning the metal layer using a resist; and patterning the electrically conductive polymer directly to form electrodes and anode and cathode regions are described.

Description

[0001] This application claims priority from, and is a continuation-in-part of, International Application No. PCT / US97 / 20862 filed on Nov. 10, 1997 and published on May 22, 1998, the teaching of which is incorporated herein by reference. [0002] This application is a continuation-in-part of copending U.S. application Ser. No. 08 / 476,141 filed Jun. 7, 1995 entitled, “Electrically Conductive and Abrasion / Scratch Resistance Polymeric Materials and Uses Thereof” to Angelopoulos et al., the teaching of which is incorporated herein by reference. U.S. application Ser. No. 08 / 476,141 is a division of U.S. application Ser. No. 08 / 193,926 now issued as U.S. Pat. No. 5,721,299 which is a continuation-in-part of and incorporated by reference U.S. application Ser. No. 08 / 357,565 filed May 26, 1989 issued as U.S. Pat. No. 5,198,153. Thus, the teaching of U.S. application Ser. No. 08 / 357,565 filed May 26, 1989 is incorporated herein by reference. U.S. application Ser. Nos. 08 / 476,141 and 08 / 357,565...

AI Technical Summary

Benefits of technology

[0023] It is another object of the present invention to provide patterns of electrically conducting polymers having high optical transmission.

[0061] It is a more particular aspect of the present invention to provide a liquid crystal display having one or more electrically conductive polymer electrodes exhibiting high charge retention, good transmission / voltage characteristics, and good image sticking properties.

Problems solved by technology

Metals are deposited by evaporative or sputtering processes which require expensive tooling and overall are a cumbersome processes.

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