Method of fabricating alignment layer for liquid crystal display device
View Patent ↗A method of fabricating an alignment layer for a liquid crystal display device includes forming an alignment material layer on a substrate by coating an alignment material, irradiating UV rays onto the alignment material layer and pre-baking the alignment material layer; and post-baking the alignment material layer.
1. A method of fabricating an alignment layer for a liquid crystal display device, comprising:
forming an alignment material layer on a substrate by coating an alignment material;
performing an orientation process to align the alignment material layer comprising:
irradiating UV rays onto and heating the alignment material layer at the same time;
cleaning the alignment material layer after the step of irradiating the UV rays and heating; and
baking the alignment material layer after the step of cleaning,
wherein the step of irradiating the UV rays and heating is performed under a nitrogen gas, and the UV rays have an energy density with a range of about 0.05 J/cm2 to about 3 J/cm2, and wherein the step of heating is performed under a temperature of about 25 centigrade to about 230 centigrade.
2. The method according to claim 1 , wherein the alignment material includes polyimide having cyclobutane dianhydride (CBDA), wherein the polyimide is represented by
3. The method according to claim 2 , wherein R includes one of diamine and an hydride having oxydianiline (ODA).
4. The method according to claim 1 , wherein the step of baking is performed under a temperature of about 25 centigrade to about 230 centigrade.
5. The method according to claim 1 , wherein a cleaning solution for the step of cleaning includes one of an organic solvent including isopropyl alcohol and a mixture of the organic solvent and a deionized water.