High density longitudinal recording media
US7141318B1 · kind B1 · utility
2Cited by
8References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2003 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Jun 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/73919
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Magnetic recording media having improved magnetic properties such as an improved signal-to-noise ratio. The recording media includes a magnetic recording layer and an underlayer disposed beneath the magnetic recording layer. The underlayer is a Cr-based alloy such as CrMo that includes an additive selected from boron (B), silicon (Si) and boron nitride (BN). The additive preferentially segregates to the grain boundaries in the underlayer to reduce the grain size and grain size distribution in the underlayer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.