Patent ID: 6958082

Claim:
A method of producing a polishing film for polishing end surface of an optical fiber connector, said method comprising the steps of: applying a paint on a surface of a plastic film, said paint being obtained by dispersing in a resin binder solution including oligomers with siloxane bonds a mixture of a first group of silica particles with average diameter of 0.02 μm and a second group of silica particles with average diameter of 0.03 μm, wherein said mixture has a granularity distribution curve with two peaks at two different diameter values 0.02 μm and 0.03 μm; drying said paint to form a polishing layer on said surface of said plastic film whereby said polishing film is produced; and thereafter forming on said surface of said plastic film by a heat treatment a polishing layer with a network of cracks on a surface thereof.