Liquid coating composition forming a liquid crystal display element insulating film

摘要

Disclosed is a liquid coating composition for forming a liquid crystal display element insulating film, which comprises a solution to be obtained by hydrolysis of Si(OR)4 in the presence of an alkaline catalyst a hydrolyzed product of R1nSi(OR2)4-n and/or Ti(OR3)4, an aluminium salt and a deposition inhibitor, all having been uniformly mixed in an organic solvent. R, R2 and R3 each are a C1 to C5 alkyl group, R1 is an alkyl, alkenyl or aryl group, and n is 0 to 2. Though containing a trialkoxysilane having a high repelling property, the liquid coating composition may form an insulating film having high mechanical strength on a substrate and the coatability of a polyimide solution over the film is good. The adhesiveness of the oriented polyimide film to the insulating film is good. The insulating film has a high insulation property and has no bad influence on the display performance of liquid crystal display elements.