Perpendicular recording media with grain isolation initiation layer and exchange breaking layer for signal-to-noise ratio enhancement
US9190094B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2013 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Oct 5, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Aspects of the present invention relate to a perpendicular magnetic recording (PMR) media stack and methods for fabricating the same. The PMR media stack has a novel grain isolation initiation layer (GIIL) and/or a novel exchange-break layer (EBL) that can improve the signal-to-noise performance of the PMR media stack. The PMR media stack includes a substrate, a soft underlayer on the substrate, an interlayer positioned on the soft underlayer, and a grain isolation initiation layer (GIIL) positioned on the interlayer, a magnetic layer positioned on the GIIL, and an exchange break layer (EBL) positioned on the magnetic layer. The GIIL and/or EBL includes a CoCrRu-oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.