Abstract
Polishing characteristics of glass type of magnetic disk substrate, in the previous researches, is investigated. To clear the polishing mechanism, in the present research, the polishing forces for the various kinds of conditions are examined. On the basis of the results, the influence of polishing pressure, polishing speed and content of abrasives on polishing force is investigated. Polishing force increases with the increase of polishing pressure and content of abrasives, while it decreases with the increase of polishing speed.