US Patent 10522790 Film member having uneven structure

A film member having a concave-convex structure is composed of a base member; a gas barrier layer formed on the base member; and a concave-convex structure layer formed on a surface of the gas barrier layer, wherein the surface of the gas barrier layer is formed of an inorganic material which is same as a material of the concave-convex structure layer, and the concave-convex structure layer is obtained from a precursor solution applied on the gas barrier layer. The film member having the concave-convex structure has an excellent adhesion property between the concave-convex structure layer and the gas barrier layer, and a high barrier property.