Apparatus and method for stabilizing slider flying height over a discrete track media disk surface in a hard disk drive
US8169727B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 27, 2009 |
| Grant date | May 1, 2012 |
| Priority date | — |
| Expiry date | Oct 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6011
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This application discloses a hard disk drive and a disk employing Discrete Tracks each including a land with a groove at a first depth with sectors of each track separated by servo pattern wedges with a variable second land and a variable second groove possessing widths and a second depth for the grooves differing from the first widths and depth of the groove of the sectors. The second depth optimizes the stability of the flying height of a slider over both sectors and servo pattern wedges, removing the possibility of added vibrational modes adversely affecting the slider's normal operations of reading, writing and flying above the disk surface. This also discloses the disks and their manufacture of disk surfaces with these sector zones and servo pattern wedges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.