Magnetic recording device, especially for a hard disk and...

Details Magnetic recording device, especially for a hard disk and... Magnetic recording device, especially for a hard disk and...

2008-11-10

2011-10-11

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

C428S828100, C360S131000

Reexamination Certificate

active

08036070

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.

REFERENCES:
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patent: 7678476 (2010-03-01), Weller et al.
patent: 2007/0172705 (2007-07-01), Weller et al.
patent: 2 859 306 (2005-03-01), None
International Search Report from French Patent Application No. 0707916, filed Nov. 12, 2007.
Kondo et al.: “Magnetic properties of magnetic dot arrays with a soft magnetic underlayer”; Journal of the Magnetics Society of Japan; vol. 30, No. 2; 2006; pp. 112-115; XP002471711.

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