Laser texturing magnetic recording medium with ultra-fine texture pattern
US6147322A · kind A · utility
7Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0028
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for laser texturing data storage media surfaces to provide ultra-low glide avalanche in disk drives employs a continuous wave laser that is randomly modulated. A random signal generator produces a random signal that controls an acousto-optical modulator. The acousto-optical modulator, in accordance with the random signal, modulates the laser beam output of a continuous wave laser. A controllable, repeatable pattern is provided on the data storage media surface by the laser texturing with limited randomness in the circumferential direction to avoid resonance effects on a slider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.