SILICA-BASED POROUS FILM, ARTICLE HAVING SILICA-BASED POROUS FILM, AND METHOD FOR PRODUCING THE SAME ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a silica-based porous film that has good antireflection performance and antifouling property and is produced in a simple production process, to provide an article having the silica-based porous film and to provide a method for producing the article.SOLUTION: The silica-based porous film has a plurality of holes in a matrix composed mainly of silica, has a refractive index in the range of 1.10-1.38. The holes include a hole having a diameter of not less than 20 nm. The number of holes having a diameter of not less than 20 nm opening to the outermost surface of the film is 13/10nmor less and the outermost surface has a water contact angle of 70° or more.