Magneto-optic recording structure and method
US5237548A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Mar 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10586
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optic recording structure is disclosed in which the magnetic recording layer is sandwiched between an opaque substrate and a magneto-optic layer structure. The magneto-optic recording structure comprises a substrate, a magnetic recording layer coated on the substrate and a magneto-optic layer structure coated on the magnetic recording layer. The arrangement of layers permits both the magnetic and magneto-optic layers to be addressed from the same side. The magnetic recording layer and the magneto-optic layer structure can be coated on both sides of the substrate, to make double-sided disks. The recording structure also allows the use of opaque substrates. An information recording and playback device based on the magneto-optic recording structure comprises a magnetic recording head disposed adjacent the magneto-optic layer adjacent the magneto-optic layer structure for recording and reading the magneto-optic active layer. A method for recording data on the magneto-optic layer. A method for recording data on the magneto-optic recording structure comprises the steps of recording data in the magnetic recording layer through the magneto-optic layer structure to produce a fring…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.