Magnetic media and magnetic recording devices using fluorine compounds
US8628869B2 · kind B2 · utility
0Cited by
5References
20Claims
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Key dates
| Filing date | Jan 30, 2012 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Aug 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/7257
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
According to one embodiment, a lubricant includes a perfluoropolyether having a chemical structure of:wherein Rf is at least one of: —CF2O(CF2CF2O)m(CF2O)nCF2— and —CF2CF2O(CF2CF2CF2O)kCF2CF2—, with m representing 0 or a positive integer, n representing 0 or a positive integer, and k representing 0 or a positive integer, and wherein R1 to R4 are selected from a group consisting of —H orwith at least one of R1 to R4 being
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.