Patent ID: 6788369
Filing Date: 2004-09-07
Classification: C09K,G02B

Abstract:
A process for producing a selectively reflective film comprising the steps of:forming, on a substrate, a liquid crystal composition layer exhibiting a smectic phase state, a microcrystalline state or a glass state, the liquid crystal composition containing a photoreactive chiral compound, a polymerization initiator, and a liquid crystal compound having at least one polymerizable group; establishing a distribution of exposure in the liquid crystal composition layer by irradiating the liquid crystal composition layer exhibiting the smectic phase state, the microcrystalline state or the glass state with a first light; forming a selectively reflective area in accordance with the distribution of exposure by raising the temperature of the liquid crystal composition layer, in which the distribution has been established, such that the liquid crystal composition is transformed to a liquid crystal state; and hardening the liquid crystal composition by irradiating the liquid crystal composition layer, in which the selectively reflective area has been formed, with a second light to cause polymerization or cross-linking.