Burnishing tape and method of manufacturing the same, and method of burnishing magnetic disk

Abstract

Disclosed is a burnishing tape, a method of producing the same and a method of burnishing a magnetic disk with which a surface of the magnetic disk may be smoothed while contamination of a magnetic disk caused by crushed abrasive grains is prevented. A burnishing tape (1) manufactured by the method of manufacturing of the burnishing tape according to an embodiment of the invention is used to burnish the magnetic disk. The method includes: kneading and dispersing abrasive grains (5) and a binder (6) to prepare slurry; applying the slurry on the support (2) to form a coating layer; curing the coating layer to form an abrasive grain layer (3); and forming a liquid lubricant layer (4) on a surface of the abrasive grain layer (3).

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims priority of Japanese Patent Application No. 2008-172598 filed Jul. 1, 2008, the content of which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a burnishing tape used for polishing a surface of a magnetic disk used in, for example, a hard disk device, a method of manufacturing the same, and a method of burnishing the magnetic disk.[0004]2. Background Art[0005]Recently, data is recorded on a magnetic disk in a hard disk device with increasingly higher density. A recording head is spaced from a magnetic recording surface when moved with respect thereto. The surface of the magnetic disk should be fairly smooth in order to reduce the distance between the recording head and the magnetic recording surface. Accordingly, in the manufacturing process of the magnetic disk, after a magnetic layer and a protective layer are for...

AI Technical Summary

Benefits of technology

[0009]Burnishing of a magnetic disk is typically a process of polishing a surface of a magnetic disk using a burnishing tape. In particular, an abrasive grain surface of the burnishing tape is pressed against a surface of the magnetic disk at the side of a magnetic layer while the magnetic disk is being rotated. In this manner, the magnetic disk surface is polished to remove bumps and thus the magnetic disk surface may be smoothed.

Problems solved by technology

Now, contamination of the magnetic disk surface during the burnishing process has become a problem.

More particularly, it has been found that, when the magnetic disk surface is polished to remove the bumps formed thereon during the burnishing process, the abrasive grains adhering to the burnishing tape are separated or the surfaces of the abrasive grains are crushed (i.e., split) slightly and the separated grains or the abrasive grain powder produced by the crushing may adhere to the magnetic disk surface, thereby contaminating the magnetic disk surface.

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