Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1998-12-03
2000-12-19
Parker, Kenneth
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
438 30, 438 29, G02F 11335
Patent
active
061633534
ABSTRACT:
A method for fabricating a reflector which has an inclined surface for use in a reflective liquid crystal display panel, and for fabricating a reflective-type liquid crystal display panel that has a reflector with an inclined surface, and a liquid display panel made by such method are disclosed. In the reflector, a positive photoresist layer is formed into a multi-stepped configuration by exposing the layer to multiple dosages of exposure energy and then developing the layer into the multi-stepped surface. After an annealing process is conducted, the multi-stepped surface is smoothed out to provide an inclined surface that has an angle of at least 0.5.degree., and preferably of 2.5.degree. is obtained. A second photoresist layer is then deposited on top of the first photoresist layer for planarization purpose and to further smooth out the surface. Finally, a metal coating layer, such as silver or aluminum or any other high reflectivity material is deposited on top of the second photoresist layer to form a reflector.
REFERENCES:
patent: 5396688 (1995-03-01), Tsuda et al.
patent: 5818554 (1998-10-01), Hiyama et al.
patent: 5973843 (1999-10-01), Nakamura
Industrial Technology Research Institute
Parker Kenneth
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