Perpendicular magnetic recording media having novel magnetic under-layer structure
US9472228B2 · kind B2 · utility
0Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 2013 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Oct 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/7369
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic medium for perpendicular magnetic data recording having improved corrosion characteristics and reduced surface roughness. The magnetic medium includes an under-layer and a perpendicular magnetic recording layer formed over the under-layer. The under-layer can be formed of MgO and has an oxygen concentration that is greater at the perpendicular magnetic recording layer than it is away from the perpendicular magnetic recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.