Optical method and device for irradiating domains at predetermined positions
US5867455A · kind A · utility
64Cited by
22References
3Claims
0Family size
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Key dates
| Filing date | Aug 20, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | Aug 20, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10586
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium, optical recording method with use of it, and optical recording device for it comprise at least one magnetic layer on a substrate, the magnetic layer having a temperature Tco at which sizes of domains of the magnetic layer is sharply shrunk or expanded with temperature, thereby being capable of writing and reproducing high-density information formed of smaller domains than an optical spot diameter in a high signal quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.