Polycrystalline dielectric coating for cobalt iron alloy thin films
US9837103B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | May 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3106
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one general embodiment, an apparatus includes a magnetic transducer having a CoFe layer and an at least partially polycrystalline alumina-containing coating on a media facing side of the CoFe layer. A graded layer comprising Co, Fe, Al and oxygen is positioned between the alumina-containing coating and the CoFe layer, wherein a ratio of Co to Al in the graded layer decreases from the CoFe layer toward the alumina-containing coating. In another general embodiment, an apparatus includes a magnetic transducer having a CoFe layer and an at least partially polycrystalline alumina-containing coating on a media facing side of the CoFe layer. CoFe-oxide crystallites are present at an interface region of the CoFe layer and the alumina-containing coating and the CoFe layer. Fabrication methods are also presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.