Magnetic storage medium
US6562481B1 · kind B1 · utility
5Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Dec 3, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12854
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic storage medium has a non-magnetic substrate and a recording layer. The recording layer comprises a non-magnetic matrix and crystal grains consisting of a ferromagnetic material. Each of the crystal grains dispersed in the recording layer is a columnar shaped grain which penetrates a suface of the recording layer and has height of 30 nm or less, and a mean value of grain sizes of the crystal grains in an internal direction of the recording layer is 15 nm or less. (Ku·V)/(kB·T) is not less than 60. A mean value Hk of anisotropic magnetic fields of the plurality of crystal grains is 20 kOe or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.