Magnetic recording medium having linear or curved tracking servo patterns formed obliquely relative to direction of tracks, and magnetic recording apparatus using the same
US6324032A · kind A · utility
27Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | May 7, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium having magnetic patterns into which servo information are written and a magnetic recording layer into which data are written comprises a nonmagnetic substrate, a magnetic recording layer formed on the substrate, and a hard magnetic layer contacting the magnetic recording layer within servo signal recording regions on the substrate and constituting servo patterns of film thicknesses of which are varied in the track length direction. Thereby, more precise reading of the servo signals by the magnetic head is assured and a surface of the magnetic recording medium can be flattend.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.