Dynamic information storage or retrieval – Specific detail of information handling portion of system – Electrical modification or sensing of storage medium
Reexamination Certificate
2003-06-09
2009-08-18
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Electrical modification or sensing of storage medium
C365S151000
Reexamination Certificate
active
07577078
ABSTRACT:
A magnetic recording medium and an apparatus and a method for reading data using spin-dependent scattering of electrons are provided. The apparatus includes a probe, a magnetic recording medium, a control unit, and a measurement unit. The probe emits hot electrons through a Schottky junction or tunnel barrier. The magnetic recording medium includes a substrate, a first magnetic layer placed over the substrate, a non-magnetic layer placed over the first magnetic layer, and a second magnetic layer placed over the non-magnetic layer and having a magnetization direction parallel or anti-parallel with a magnetization direction of the first magnetic layer. The control unit applies voltage to the probe so that the probe can emit hot electrons. The measurement unit reads data recorded on the magnetic recording medium by detecting output current at the substrate that varies according to the parallel or anti-parallel alignment of magnetizations of the first and second magnetic layers.
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Dinh Tan X
Harness & Dickey & Pierce P.L.C.
Samsung Electronics Co,. Ltd.
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