Magneto-optical recording medium with initializing layer for initializing different regions in different directions
US5629909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1996 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Feb 8, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10506
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical recording medium consists of a plurality of magnetic layers, and at least one of the plurality of magnetic layers always maintains a magnetization orientation state in which magnetization is oriented in a given direction in a region, where the recording mark string is formed, on a central portion of a recording track, and magnetization is oriented in a direction anti-parallel to the given direction in regions at two sides of the region, where the recording mark string is formed, on side portions of the recording track. With this arrangement, even when recording laser power fluctuates or a tracking control error occurs during an optical modulation over-write operation, generation of an unerased portion of initially recorded information can be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.