Method and apparatus to determine fly height of a recording head
US6688743B1 · kind B1 · utility
7Cited by
37References
19Claims
0Family size
Inventors
Key dates
| Filing date | Sep 29, 1998 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Sep 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/1058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention features a fly height measurement system for measuring fly height of a slider over a storage disc. The fly height measuring system includes a source of light, a slider, a detector module and a processor. The source of light produces light along a light path. The slider includes an objective lens positioned such that light from said source hits the objective lens and is directed toward a surface of a disc. Light propagating from the disc is directed to a detector. The processor estimates the fly height of the slider based on detector module output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.