Magnetic recording medium and recording/reproducing method therefor as well as information processing apparatus by means thereof
US5619480A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1994 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Aug 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/825
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a magnetic recording medium of a disk shape having a magnetic layer containing a magnetic material formed on a non-magnetic support and having, between the non-magnetic support and the magnetic layer, a layer containing a dye, of which the optical property changes by irradiation of energy rays, wherein in the above-mentioned layer containing a dye, continuous servo-signals based on the change of the optical property of the dye by irradiation of energy rays, are recorded on concentric tracks, and a recording/reproducing method therefor as well as an information processing apparatus. The magnetic recording medium of the present invention can be produced at a low production cost, has a large magnetically-recordable area and permits accurate tracking by a single detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.