Thin film magnetic media for minimal lubricant transfer to head during flying
US6548140B1 · kind B1 · utility
9Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1996 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Aug 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light abrasive texture is applied over the data zone of a thin film magnetic disc, while a surface texture of a second roughness is applied over the landing zone. A lubricant is applied over both the landing zone and the data zone. The lubricant is a high molecular weight PFPE lubricant which has been fractionated by supercritical fluid fractionation in carbon dioxide to exclude the fractions of low molecular weight and to exclude the fractions of very high molecular weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.