Perpendicular magnetic recording medium
US6395413B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Sep 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/656
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording medium having an excellent thermal stability of the recorded signal and S/N and a low medium noise, and capable of easily forming a perpendicular magnetic recording layer is provided. The perpendicular magnetic recording medium has, at least, a perpendicular magnetic recording layer having a hexagonal closest packing (hcp) structure of which c-axis is perpendicular to a surface of the perpendicular magnetic recording layer, on a non-magnetic base, wherein the perpendicular magnetic recording layer has a saturation magnetization Ms of not more than 400 emu/cc, and a lattice constant c of the hexagonal closest packing structure is not more than 4.07 å.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.