Method for making zone-bonded lubricant layer for magnetic hard discs
US6878418B2 · kind B2 · utility
1Cited by
25References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2003 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Jun 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/8408
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A system and method for improving the durability and reliability of recording media used in hard drives is disclosed. A protective overcoat made by depositing a diamond like carbon (DLC) layer over a magnetic layer and then depleting a portion of the DLC protective layer of hydrogen before it is coated with a Perfluoropolyethers (PFPE) using an in-situ vapor lubrication technique. The portion of the DLC layer which is depleted can be data zone of the media so that the lubricant-bonding ratio is higher for the landing zone than it is for the data zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.