Patent ID: 8603371

Claim:
A method for producing fine convexes and concaves on a surface of a material, which comprises: 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 the mask member spaced from the photosensitive film, determining parameters which, in combination, provide a desired shape for the convexes and concaves, the parameters including haze (JIS K7 136:2000) of a light diffusing layer of 33% 60%-or less, distance from the light-shielding surface of the mask member to the photosensitive film, and distance between the photosensitive film and the surface of the light diffusing layer facing the photosensitive film, disposing the light diffusing layer having the determined haze between the mask member and the photosensitive film with the photosensitive film spaced from the facing surface of the light diffusing layer by the determined distance, exposing the photosensitive film to light from a light source disposed on the side of the mask member through the light transmitting sections of the mask member, and removing exposed portions or unexposed portions of the photosensitive film by development to produce convexes and concaves on the photosensitive film in the desired shapes corresponding to shapes of the exposed portions or unexposed portions.