Magnetic disk with textured area on part of disk

Details Magnetic disk with textured area on part of disk Magnetic disk with textured area on part of disk

1989-12-18

1991-02-26

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

Disk

G11B 582

Patent

active

049966227

ABSTRACT:
A magnetic disk in which a texture is formed in a first region spaced apart from an opening formed in a glass substrate by a predetermined distance, and a lubricant is coated on only the texture. The texture is not formed in a second region serving as a data surface, and an undercoating film, a magnetic recording film, and a protective film are sequentially coated on the surface of the glass substrate. In this magnetic disk, a floating amount of a magnetic head can be set to be small, and high-density data can be recorded. The data surface can be free from contamination by dust.

REFERENCES:
patent: 4152487 (1979-05-01), Yanagisawa
patent: 4738885 (1988-04-01), Matsumoto

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