Method of producing circular polarization controlling...

Details Method of producing circular polarization controlling... Method of producing circular polarization controlling...

2006-03-14

2006-03-14

McPherson, John A. (Department: 1756)

Radiation imagery chemistry: process, composition, or product th

Liquid crystal process, composition, or product

C430S321000, C427S495000, C427S508000, C427S163100

Reexamination Certificate

active

07011914

ABSTRACT:
An active-radiation-curing liquid crystalline composition is applied to an alignment layer2formed on a base1, and the liquid crystal alignment is regulated by the application of heat or the like, thereby forming a liquid crystal layer3having cholesteric regularity (FIG.1(a)). Next, active radiation4with a predetermined radiant intensity is applied to the liquid crystal layer3through a photomask10(FIG.1(b)), and this liquid crystal layer3is then brought into contact with a solvent5(FIG.1(c)). As a result, the area3bin the liquid crystal layer3not irradiated with the active radiation4is removed, while the area3ain the liquid crystal layer3irradiated with the active radiation4remains; a semi-cured cholesteric layer3′ having therein a predetermined pattern is thus formed (FIG.1(d)). Thereafter, active radiation6is applied to the surface of the semi-cured cholesteric layer3′ to form a curing rate gradient in the semi-cured cholesteric layer3′ between the substrate9side surface and the surface opposite to it and cure, while retaining this curing rate gradient, the semi-cured cholesteric layer3′ to broaden its selective reflection wave range (FIG.1(e)). Lastly, the semi-cured cholesteric layer3′ is cured by the application of active radiation8while retaining the cholesteric regularity which the semi-cured cholesteric layer3′ has developed in the course of broadening of its selective reflection wave range, thereby obtaining a cured cholesteric layer3″ (FIG.1(f)).

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