Liquid crystal device

Details Liquid crystal device Liquid crystal device

1993-11-08

1994-07-12

Powell, William

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

1566591, 156667, 428 1, G02F 113

Patent

active

053293894

ABSTRACT:
An electrode plate structure for a liquid crystal color display is produced by forming a color filter layer of a photosensitive polyamide resin containing a colorant dispersed therein; disposing a protective layer of a photosensitive polyamide resin on the color filter layer; forming an ITO (indium-tin-oxide) film on the protective layer, preferably at an elevated temperature of at most 270.degree. C.; post-annealing the ITO film at a temperature of 200.degree.-300.degree. C. for improving the crystallinity of the ITO film suitable for etching; and selectively etching the ITO film patternwise with an etchant of hydroiodic acid or a hydroiodic acid-ferric chloride aqueous solution mixture to leave an ITO electrode pattern.

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