PRODUCTION OF MAGNETIC DISK MEDIUM

PURPOSE:To realize a high-accuracy working method by which the scratching of a magnetic disk medium surface is obviated by using a lapping tape and executing burnishing then finishing by polishing while the medium is kept rotated at a high speed prior to polishing. CONSTITUTION:A spindle attached with the magnetic disk medium is rotated at a high speed of >=2 times the speed at the time of the polishing in the stage (a) before the polishing in a finishing stage after the baking of the coated film of the medium. A polishing fluid is then supplied in a stage (b) and while the surface of the medium is kept wet with the liquid, a roller is pressed to the medium surface from above the lapping tape to remove projections and foreign matter during cleaning in a stage (c). The rotating speed of the medium is lowered to the number of revolutions at the time of the polishing in a stage (l) upon ending of the burnishing in the stage (d). After the polishing is executed for the prescribed period of time, the supply of the polishing fluid is stopped and the rotation of the medium is continued to shake off and remove the polishing liquid sticking to the medium in the final stage (g).