Differential head integrated touchdown sensors for hard disk drives
US7800858B1 · kind B1 · utility
207Cited by
14References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2009 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | May 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/455
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for providing a disk drive is described. The disk drive includes media such as one or more disks, a slider, and a head residing on the slider. The head has an air-bearing surface (ABS), a portion of which contacts the media during touchdown. The head further includes a plurality of touchdown sensors. A first touchdown sensor is proximate to the ABS, while a second touchdown sensor is distal from the ABS. The touchdown sensors are capable of detecting a temperature change of 0.1 degree Celsius or, in some embodiments, smaller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.