US PATENT SUBCLASS 438 / 30
.~.~ Liquid crystal component

Current as of: June, 1999
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438 /   HD   SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS

22  DF  MAKING DEVICE OR CIRCUIT EMISSIVE OF NONELECTRICAL SIGNAL {12}
29  DF  .~ Including integrally formed optical element (e.g., reflective layer, luminescent material, contoured surface, etc.) {3}
30.~.~ Liquid crystal component

DEFINITION

Classification: 438/30

Liquid crystal component:

(under subclass 29) Process for making a semiconductor device wherein the additional optical element is a substance, usually organic with at least one polarizable group, capable of unidirectional molecular alignment in layers, giving rise to optical bifringement.

(1) Note. Liquid crystals, on variation in pressure, temperature, electric current passing therethrough, etc., change their colors or light transmitting ability, the cholesteric type changing colors while the nematic-type changes between transparency and opacity.

SEE OR SEARCH CLASS

345, Selective Visual Display Systems,

87+, for a display element control system for liquid crystal display elements arranged in a matrix configuration.

349, Liquid Crystal Cells, Elements and Systems, particularly

187+, for nominal manufacturing methods or postmanufacturing processing of liquid crystal cells.