Magneto-optical recording medium
US6319623A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2000 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Feb 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical recording medium is disclosed with which magneto-optical recording is performed by a magnetic-field modulation method and which enables stable recording characteristics to be realized even if the intensity of the recording magnetic field is somewhat changed. When a magneto-optical recording medium incorporating a signal recording layer made of TbFeCoCr and arranged such that a magneto-optical recording operation is performed with respect to the signal recording layer by the magnetic-field modulation method is manufactured, the signal recording layer is formed such that the total quantity of Tb and Cr contained in the signal recording layer is 24.+-.1 at %. After the signal recording layer has been formed, exposure to stem by 30.times.10.sup.-6 Torr.multidot.sec to 10000.times.10.sup.-6 Torr.multidot.sec or exposure to oxygen by 10.times.10.sup.-6 Torr.multidot.sec to 50.times.10.sup.-6 Torr.multidot.sec is performed to oxidize the surface of the signal recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.