Recording medium, a method for producing the same, a control method using the recording medium, and a recording/reproducing apparatus using the recording medium
US5815485A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1996 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Aug 27, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk-shaped recording medium includes a plurality of first tracks and a plurality of second tracks for recording data, the first track and the second track being alternately arranged in the radial direction on the surface of the recording medium in one of a pattern of concentric circles and a spiral pattern; a plurality of first servo areas and a plurality of second servo areas discretely located at a plurality of respective specified rotation angular positions of the surface along the circumferential direction of the recording medium; and a plurality of first servo marks and a plurality of second servo marks used for tracking control. The first servo marks are provided in the first servo areas along each of the first tracks, and the servo marks are provided in the second servo areas along each of the second tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.