Servo patterning compatible with planarization of patterned magnetic disks
US8526132B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2010 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Feb 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments herein illustrate patterned servo data that allows the patterned disk to be planarized with a relatively simple planarization process. A magnetic disk, in this regard, includes a data region having a plurality of tracks. The magnetic disk also includes a plurality of servo bursts patterned in the magnetic disk at a plurality of locations in each track. The servo bursts are operable to direct a controller to center a write head over a track in the data region and write a track identification. The servo bursts include magnetic lands and nonmagnetic grooves. The magnetic lands of the servo burst are generally configured with a uniform polarity of magnetization and a first uniform width. The nonmagnetic grooves are configured with a second uniform width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.