A liquid crystal display includes a substrate defining an active area and a non-active area surrounding the active area, a sealant located on the non-active area for hermetically connecting with another substrate to seal a crystal liquid layer between the substrate and the another substrate, and an alignment film barrier wall formed on the non-active area and located between the sealant and the active area. The barrier wall has a wave-shaped configuration consisting of protrusions projecting toward the active area and recesses recessed from the active area. When liquid polyimide is applied to the substrate to from an alignment film, the liquid polyimide is injected at fronts of the protrusions; then the liquid polyimide flows along the wave-shaped barrier wall to enter the recesses thereof.