Dynamic test glide head calibration using laser adjustment
US8338742B2 · kind B2 · utility
2Cited by
30References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2007 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Oct 20, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6011
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for the calibration and use of test glide head gimbal assemblies are disclosed. Calibration is performed by pulse laser adjustment of the flexure mounted to the glide head, while the head is flying above a media test disk having asperities of known dimensions. The calibration process normalizes the fly heights of glide heads used to measure defects on both upper and lower surfaces of disk drive media, allowing upper and lower surfaces to be scanned simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.