Magnetic recording medium with high density thin dual carbon overcoats
US6303214A · kind A · utility
12Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2000 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Jan 4, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium is formed with dual carbon-containing protective layers having a combined thickness of less than about 100 .ANG. with high corrosion resistance and superior magnetic performance. Embodiments of the present invention include sputter depositing a first protective layer of hydrogenated carbon at a density of at least 1.9 while applying a DC bias of about 250V to about 400V to the substrate, and sputter depositing a second protective layer comprising nitrogen-doped hydrogenated carbon on the first protective layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.