Integrated electrostatic slider fly height control
US6876509B2 · kind B2 · utility
25Cited by
10References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2002 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Mar 12, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B9/1445
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc drive that includes a slider with a field emission sensor that senses fly height. The sensor has an electrode tip disposed on the slider. The electrode tip faces a media surface across a gap. The sensor conducts a tunneling current through the gap and provides an output representing the length of the gap. An actuator adjusts the fly height spacing. A feedback circuit provides an actuator electrical input as a feedback function of the sensor output to control the fly height spacing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.