Magnetic recording medium with grain size control layer
US6132863A · kind A · utility
7Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Sep 24, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Simultaneous crystallographic orientation and grain size refinement of the magnetic layer are achieved by depositing a grain size control layer on a underlayer. Embodiments include depositing a CrV grain size control layer on a Cr underlayer at thickness ratio of underlayer to grain size control layer of about 0.5 to about 2. Magnetic layers having a grain size of about 100 .ANG. to about 250 .ANG., e.g. at 180 .ANG. to about 220 .ANG., are achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.