Methods and systems for self-servowriting including maintaining a reference level within a usable dynamic range
US6031680A · kind A · utility
17Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems for self-servowriting a data storage medium are disclosed, including servoing to propagation bursts of a propagation pattern located in tracks other than an immediately preceding track. Reference levels used to position a recording head are accordingly kept in a usable dynamic range necessary to keep servo track spacing constant across the medium. The methods and systems are disclosed in connection with a rotary actuator having spaced read and write heads. Similar methods are disclosed for writing trigger or timing bursts of the propagation pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.