Method of making a magnetic recording medium with laser-formed differential zone lubrication
US6221442A · kind A · utility
1Cited by
0References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | May 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Stiction failure of a magnetic recording medium is reduced by forming a lubricant topcoat having a first thickness over the landing zone greater than a second thickness over the data zone, with a sharp transition step having an angle of at least about 70.degree. with respect to a line perpendicular to the surface. Embodiments include depositing a lubricant topcoat at a substantially uniform thickness and reducing the thickness of the lubricant topcoat over the data zone by about 20% to about 80% employing a laser light beam to volatilize the lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.