Hard disk double lubrication layer
US9607646B2 · kind B2 · utility
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234References
17Claims
0Family size
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Key dates
| Filing date | Mar 4, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Mar 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/7257
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are illustrated for manufacturing hard disks with double lubrication layers that allow minimization of a HDD head DFH touchdown point while maintaining good tribology performance for HDD reliability. An exemplary hard disk includes a magnetic recording layer, a carbon overcoat, and a double lubrication layer: a bonded lubrication layer and a mobile lubrication layer. The bonded lubrication layer includes a high conformity and high density first lubricant. The mobile layer include a high lubricity lubricant that promotes HDI reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.