SURFACE ASPERITY FORMING METHOD, OPTICAL FILM OBTAINED BY THE SAME, DIFFUSE REFLECTION PLATE, AND ROUGHENED SURFACE FILM

摘要

PROBLEM TO BE SOLVED: To provide a method by which an exposed surface of a substrate can easily be formed at low cost and a resin surface asperities can be formed at the same time, an optical film obtained by the method, a diffuse reflection plate, and a roughened surface film.

SOLUTION: The surface asperity forming method conforming with a mask pattern includes the stages of: forming an energy-sensitive negative resin composition layer 3 containing at least one or more kinds of polymerizable monomer or oligomer; irradiating a place other than where the energy-sensitive negative resin composition layer 5 is removed with an active energy beam; performing irradiation with an active energy beam at least one or more times through a pattern-formed mask 6; etching the energy-sensitive resin composition layer which is not irradiated with the active energy beam 4; and post-heating it.

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