LIQUID CRYSTAL ALIGNMENT LAYER AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a large area liquid crystal alignment layer with high productivity and the liquid crystal alignment layer. SOLUTION: A substrate is coated with a photoreactive polymer material and a film of the material is formed. The material is isotropic in the film. An unpolarized ultraviolet ray from an ultraviolet lamp is transformed into an ultraviolet ray in which polarized and unpolarized components are mixed (available with a comparatively easy means as obliquely arranging a transparent substrate such as a quartz plate in the optical irradiation path). When the ray irradiates the film from a direction tilted with respect to the substrate normal, the film in which an anisotopic photodimerization has proceeded is obtained. The polymer material film turns into the alignment layer to align liquid crystal molecules and can be used as the alignment layer for a liquid crystal display.