Contact start/stop disk drive with minimized head-disk wear in textured landing zone
US5729399A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1995 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Dec 13, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A contact start/stop (CSS) magnetic recording disk drive has a highly textured head easier landing zone on the disk and uses a start/stop precedure that minimize both the time the carrier is in contact with the landing zone and the disk rotational speed during contact. The disk landing zone is textured with a pattern of laser-induced bumps that define a surface higher than the surface of the disk data region. At disk drive start-up and power-down, the head carrier exits and enters the landing zone at a predetermined disk rotational speed selected such that the air-bearing surface of the head carrier is still in contact with the surface of the landing zone but is flying in the data region. This limits the amount of time the carrier spends in contact with the textured surface and minimizes the disk speed when it is in contact. The reduced time and speed of carrier-disk contact in the landing zone improves the landing zone durability for any given texture level, which allows a larger level of texturing (and therefore lower stiction) to be used while maintaining adequate landing zone durability (number of CSS cycles without failure). Disk drive actuator control circuitry for start-up a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.