Patent ID: 7037443

Claim:
A homeotropic alignment liquid crystal film which is formed on a substrate without using a vertical alignment film, said homeotropic alignment liquid crystal film comprising: a homeotropic alignment liquid crystal polymer coated and homeotropically-fixed on the substrate, said liquid crystal polymer showing nematic phase, said homeotropic alignment liquid crystal polymer being formed from a side chain type liquid crystal polymer of a monomer unit (a) containing a liquid crystalline fragment side chain and a monomer unit (b) containing a non-liquid crystalline fragment side chain, wherein the monomer unit (a) comprises a monomer unit represented by the following formula: wherein R 1 is a hydrogen atom or a methyl group, a is a positive integer of 1 to 6, X is —CO 2 — group or —OCO— group, R 2 is a cyano group, an alkoxy group with 1 to 6 carbon, fluoro group or alkyl group with 1 to 6 carbon, and b and c are integers of 1 or 2 respectively; and the monomer unit (b) comprises a monomer unit represented by the following formula: wherein R 3 is a hydrogen atom or a methyl group, R 4 is an alkyl group with 1 to 22 carbon, a fluoroalkyl group with 1 to 22 carbon, or a monomer unit represented by the following formula: CH 2 —CH 2 —O d R 5 wherein d is a positive integer of 1 to 6, and R 5 is an alkyl group with 1 to 6 carbon.