Liquid crystal alignment agent compositions, liquid crystal alignment layer manufacturing method, liquid crystal alignment layer using same, and liquid crystal display device

The present invention relates to liquid crystal alignment agent compositions, a liquid crystal alignment layer manufacturing method, a liquid crystal alignment layer using same, and a liquid crystal display device including a liquid crystal alignment layer. More particularly, the present invention provides a liquid crystal alignment layer manufacturing method, a liquid crystal alignment layer, and a liquid crystal display device including the liquid crystal alignment layer, which may apply liquid crystal alignment agent compositions to a substrate, dry the same, immediately irradiate light on the same without a high-temperature heat treatment process, performs an aliment process and a heat process, and harden the same, thereby reducing light irradiation energy and providing a liquid crystal alignment layer having an excellent alignment property, reliability, voltage maintenance ratio, and electric features through a simple process.