Laser-texturing data zone on a magnetic disk surface by using degenerative two wave mixing
US6297910A · kind A · utility
9Cited by
5References
1Claims
0Family size
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Key dates
| Filing date | Jul 10, 2000 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Jul 10, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/144
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A laser-optical wave mixing technique is provided for forming a high density textured data zone in an efficient and accurate manner. A single coherent laser beam of wavelength .lambda. is split into two beams with roughly the same intensity. These two beams are then overlapped with a cross angle of 2.theta. and focused at the disk surface, resulting in an intensity grating thereon. The intensity grating creates a wave-form pattern consisting of a series of high-energy laser beam lines that will heat the target surface and make surface topographical changes accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.