Laser textured magnetic disk
US6797130B2 · kind B2 · utility
2Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2003 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Jun 27, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/851
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic disk is provided which comprises a nonmetallic glass or glass ceramic substrate having one or more under layers, a magnetic layer applied over the under layers, and a hard carbon layer applied over the magnetic layer. A plurality of bumps are formed on the magnetic disk by applying a beam from a near infrared wavelength laser to the surface of the carbon layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.