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Title:
MAGNETIC DISK
Document Type and Number:
Japanese Patent JPH07272257
Kind Code:
A
Abstract:

PURPOSE: To stabilize CSS durability by treating the surface of a protective layer by irradiation with actinic rays before a lubricant layer is formed.

CONSTITUTION: An underlayer 2 is formed on a nonmagnetic base 1 consisting of a nonmagnetic substrate 1a and a nonmagnetic metallic layer 1b formed on the substrate 1a, and a magnetic layer 3, a protective layer 4 and a lubricant layer 5 are successively formed on the underlayer 2. The substrate 1a is, e.g. made of Al, glass or carbon and the layer 1b is, e.g. made of Ni-P, Cr or Ti and has 5-20μm thickness. The surface of the base 1 is preferably textured with an abrasive tape or the like so as to regulate the surface roughness Ra to 30-80 and Rp to 100-300. The increase of the thickness of a fixed layer in the lubricant layer 5 with the lapse of time is inhibited and CSS durability is stabilized.


Inventors:
ITO HIDEKAZU
KUBO HIROKI
Application Number:
JP6473894A
Publication Date:
October 20, 1995
Filing Date:
April 01, 1994
Export Citation:
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Assignee:
KAO CORP
International Classes:
G11B5/72; C10M177/00; G11B5/725; C10N40/18; (IPC1-7): G11B5/72
Attorney, Agent or Firm:
Osamu Hatori



 
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