Magnetic recording medium
US6197440A · kind A · utility
9Cited by
1References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12653
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprises a stack of four magnetic layers. The first magnetic layer 11 is a layer for reproducing information recorded on the medium. The third magnetic layer 13 is a storage layer for storing information recorded on the medium in the form of domain walls. The second magnetic layer 12 has a lower Curie temperature Ts than the first and third magnetic layers and is interposed between the first and third magnetic layers. The fourth magnetic layer 14 is interposed between the first 11 and second 12 magnetic layers, and has a larger domain wall energy density than that of the first magnetic layer 11.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.