PURPOSE: To form an uniform work trace and to prevent an abnormal scratch from generating, by forming uniform abrasive grains by one layer on the base of a polishing tape.
CONSTITUTION: A fine abrasive grain layer is formed with a monolayer as shown in the figure, when a fine abrasive grain 1 is fixed with its deposition on the face of a metal foil 2 in the electrolyte in which fine abrasive grain l in several μm grain size is dispersed, with a metal foil 2 in scores μm thickness as the base, as the method of fixing the fine abrasive grain 1 on the base with one layer, with that which fixes the fine abrasive grain 1 with one layer on the base of a polishing tape and which makes the shape and grain size distribution of the fine abrasive grain 1 uniform. Therefore the tip cutting edge of individual abrasive grain 1 uniformly acts on the magnetic disk surface. A uniform work trace by the cutting edge of the individual abrasive grain 1 is formed on the magnetic disk surface, and a scratch free surface of high accuracy can thus be obtained.
SEKIYAMA SHINYA
NAKAGAWA YOSHIO
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