Reflection type liquid crystal display and method of fabricating

Details Reflection type liquid crystal display and method of fabricating Reflection type liquid crystal display and method of fabricating

1997-11-05

1999-08-17

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

G02F 11335

Patent

active

059401540

ABSTRACT:
There is provided a reflection type liquid crystal display including (a) a first substrate having a roughened surface, (b) a second substrate spaced away from the first substrate in opposing relation to the roughened surface of the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a metal film formed on the roughened surface of the first substrate for reflecting lights therefrom, (e) a transparent dielectric film formed on the metal film, the transparent dielectric film having a planarized upper surface, (f) a plurality of transparent pixel electrodes formed on the transparent dielectric film, and (g) a plurality of switching devices formed on the transparent dielectric film, each of the switching devices being electrically connected with each of the transparent pixel electrodes, the transparent pixel electrodes and the switching devices being arranged in a matrix. The above-mentioned reflection type liquid crystal display makes it possible to provide an excellent light diffusion and reflection function without special technique. In particular, it is possible to reduce the number of photolithography steps for fabricating an active matrix type substrate, ensuring lower fabrication costs and a higher fabrication yield.

REFERENCES:
Bahadur, Liquid Crystals: Applications and Uses, pp. 397-436, 1990.
S. Mitsui et al., "Bright Reflective Multicolor LCDs Addressed by a-Si TFTs", SID 92 Digest, 1992, pp. 437-440.

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