Patent ID: 8298752

Claim:
A method for producing fine convexes or concaves on a surface of a material, which comprises the step of disposing a mask member having light transmitting sections and non-light transmitting sections over one side of a photosensitive film consisting of a photosensitive resin composition with an interval with respect to the photosensitive film, the step of disposing a light diffusing member on the opposite side of the photosensitive film across the mask member, the step of exposing the photosensitive film through the light diffusing member and the light transmitting sections of the mask member by irradiating light from a light source disposed on the opposite side of the mask member across the light diffusing member, and the step of removing exposed portions or unexposed portions of the photosensitive film by development to produce convexes or concaves on the photosensitive film in shapes determined by shapes of the exposed portions or unexposed portions, wherein in the step of exposure, light exposure conditions are controlled so as to control the shapes of the exposed portions or unexposed portions, wherein the photosensitive film is formed on or disposed in contact with a substantially transparent first base material, and the exposure is performed from the side of the first base material.