Magneto-optical disk and process for manufacturing the same

Details Magneto-optical disk and process for manufacturing the same Magneto-optical disk and process for manufacturing the same

1990-12-21

1993-01-12

Shepperd, John W.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692755, 369283, 264 13, 264 14, 264 25, G11B 724, G11B 370

Patent

active

051795469

ABSTRACT:
A magneto-optical disk which has a circular disk form and comprises a substrate provided with information pits and a guide groove, a recording medium layer provided on the substrate, and a protective layer formed of at least one thin film on the medium layer, in which the surface of the protective layer is minutely roughened to have a concave rough pattern and not to substantially protrude beyond a reference level composed of the outermost surface portions of the protective layer. When the magneto-optical disk is subjected to recording by a CSS system using an air floating magnetic head conforming to high-frequency recording in a magnetic field modulation type recording, which is one of methods of overwrite recording on magneto-optical disks, the minute concave rough pattern formed on the surface of the disk substrate prevents such troubles as adhesion of the magnetic head to the surface of the disk and collision between the disk substrate being rotated and the head.

REFERENCES:
patent: 4668550 (1987-05-01), Tajima et al.
patent: 4707431 (1987-11-01), Umehara
patent: 4729938 (1988-03-01), Tajima et al.
patent: 4734810 (1988-03-01), Nakayama et al.
patent: 4889757 (1989-12-01), Horigome et al.
patent: 4939603 (1990-07-01), Inumochi
patent: 4947384 (1990-08-01), Suzuki et al.
patent: 4985881 (1991-01-01), Saito et al.
"Magneto-Optical Recording Characteristic of TbFeCo Media by Magnetic Field Modulation Method", Japanese Journal of Applied Physics, vol. 26, No. 2, Feb. 1987, pp. 231-235, Fujio Tanaka.

Affiliated with

Also associated with

Rating

Magneto-optical disk and process for manufacturing the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magneto-optical disk and process for manufacturing the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical disk and process for manufacturing the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1224657