Method of producing a magnetic recording medium
US6699332B1 · kind B1 · utility
6Cited by
5References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2000 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Aug 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F10/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of producing a magnetic recording medium comprising the steps of providing a substrate having a layer of a non-magnetic material that can be converted into a magnetic state by annealing, and then converting selected portions of the non-magnetic layer to a magnetic state by subjecting them to annealing by directing a focussed beam of radiation onto the substrate to form a patterned magnetic layer comprising an ordered array of magnetic regions separated by non-magnetic regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.