Method and apparatus for minimizing slider fly heights over patterned media
US6563673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Sep 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A patterned magnetic storage medium has a plurality of data sectors separated by respective servo sectors with each servo sector having a pattern of pits representing servo data. Grooves in each data sector separate adjacent tracks. Non-uniform structures patterns the grooves to a model of minimum or zero fly height perturbations of a slider adjacent the medium. The non-uniform structures preferably include lands pseudo-randomly spaced along each groove to form segmented grooves of pseudo-random length, with the lands being pseudo-randomly positioned across the data sector. In other embodiments, the servo sectors have lengths along each track to define a null frequency that matches a pitch frequency of modulation of a slider due to the pits of the servo sectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.