ABRASIVE FILM AND METHOD OF PRODUCING THE SAME

摘要

A polishing film capable of smoothly finishing the surface of a precision instrument without leaving any localized unpolished spots is provided. A polishing film includes a plastic film 1 and a polishing layer 5 formed on its surface, having a mixture of a first group of silica particles 2 with a first average diameter and a second group of silica particles 3 with a second average diameter fixed in a resin binder 4, the first average diameter and the second average diameter being different from each other and both within a range of 0.001-10µm. A network of cracks 6 is formed on the surface of the polishing layer 5. The network of cracks 6 serves to take in waste materials generated during a polishing process. The mixture of the two groups of silica particles has a granularity distribution curve with two peaks at two different diameter values corresponding to the first and second average diameters.