Magnetic recording device, especially for a hard disk and its manufacturing process
US8036070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2008 |
| Grant date | Oct 11, 2011 |
| Priority date | — |
| Expiry date | Oct 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording device comprising at least one unstructured recording support exhibiting at least one elementary magnetic layer, the recording support having a magnetization perpendicular to the plane of the support characterized in that it comprises magnetic elements having a magnetization perpendicular to the plane of the support and a greater inversion field than the inversion field of the recording support, and which are separated from the recording support by a decoupling layer made of a nonmagnetic material so that the magnetic elements produce a dipolar field in the recording support. The magnetic elements are spaced apart from one another by nonmagnetic regions, each magnetic element defining during a write operation a memory point in the recording support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.