Magnetic data storage tape with etched servo pattern, method of manufacturing same, and method of servo positioning on same
US6433951B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1999 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Feb 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Magnetic data storage tapes with etched servo patterns are disclosed along with methods of manufacturing the tapes. The servo tracks formed by etching may be read magnetically by magnetically overwriting a pattern etched into a magnetic coating on the tape, followed by detecting the electromagnetic modulation caused by the servo pattern etched into the magnetic coating. The etched servo pattern may also be read optically in addition to magnetically, with the optical writing occurring simultaneously, sequentially or both simultaneously and sequentially. Whether the servo tracks are read magnetically or magnetically and optically, the electromagnetic and/or electromagnetic/optical modulation caused by the etched pattern can be used to accurately position a read/write head on the tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.