Magnetic disk having improved surface configuration and magnetic

Details Magnetic disk having improved surface configuration and magnetic Magnetic disk having improved surface configuration and magnetic

1996-03-27

1997-10-21

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record medium

Disk

428694SG, G11B 582, G11B 566, B05D 512

Patent

active

056802854

ABSTRACT:
There is disclosed a magnetic disk having a surface shape so designed as to satisfy flying and sliding characteristics in CSS and to avoid head adhesion even in a high-density recording. The surface shape of the contact surface of the magnetic disk for contact with a sliding surface of a magnetic head plays a very important role in the magnetic disk characteristics such as the head flying characteristics, the head adhesion and the CSS characteristics, and it has been found that a three-dimensional load ratio BR5 (0.5% to 10%) and a symmetric property Rsk (0.5 to 2) of a cross-section curve representing depressions and projections on the surface are essential as items of evaluation of this surface shape. For example, the surface shape of an aluminum alloy disk plated with Ni-P is processed in such a manner that the load ratio of the three-dimensional load ratio BR5 is 0.5% to 10% and that the symmetric property Rsk of the cross-sectional shape of this surface is 0.5 to 2. Then, a chromium intermediate film, a Co-Cr magnetic film, a carbon protective film and a film of lubricant are formed on the substrate. By doing so, the magnetic disk having the desired characteristics can be obtained.

REFERENCES:
patent: 4568599 (1986-02-01), Ono et al.
patent: 4578729 (1986-03-01), Suzuki et al.
patent: 4670319 (1987-06-01), Katoh et al.
patent: 4680217 (1987-07-01), Kanesaki et al.
patent: 4762742 (1988-08-01), Sonoda et al.
patent: 4833001 (1989-05-01), Kijima et al.
patent: 4925738 (1990-05-01), Tsuya et al.
patent: 5070425 (1991-12-01), Inumochi
patent: 5124184 (1992-06-01), Wong
patent: 5166006 (1992-11-01), Lal et al.
patent: 5202810 (1993-04-01), Nakamura et al.
patent: 5285343 (1994-02-01), Tanaka et al.
patent: 5353182 (1994-10-01), Nakamura et al.
patent: 5388020 (1995-02-01), Nakamura et al.
patent: 5549211 (1996-08-01), Nakamura et al.

Affiliated with

Also associated with

Rating

Magnetic disk having improved surface configuration and magnetic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic disk having improved surface configuration and magnetic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic disk having improved surface configuration and magnetic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1011687