PRODUCTION METHOD FOR COMPOSITE PROJECTION-RECESS STRUCTURE AND USE APPLICATIONS OF SUCH STRUCTURE

WIPO Patent Application WO/2021/079823

A1

The present invention provides a novel processing method that is for production of a mold for molding a material that has water-repelling property and hydrophilicity on the surface. The method according to the present invention is for producing a composite projection-recess structure having, on the surface thereof, a composite type projection-recess structure, the method being characterized by comprising: a preparation step for preparing an etching substrate having a body and a bilaminar metallic laminate film formed on the surface of the body; and an etching step for performing a two-stage etching treatment on the metallic laminate film formed on the body, wherein, in the bilaminar metallic laminate film, the etching rate (E1) for a metallic film (M1) disposed on an upper side with respect to the body and the etching rate (E1) for a metallic film (M2) disposed on the body side satisfy the relation E1