Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Reexamination Certificate
2007-02-20
2007-02-20
Dinh, Tan (Department: 2627)
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
C369S013470, C428S690000
Reexamination Certificate
active
10497273
ABSTRACT:
It is an object of the present invention to provide a magneto-optical recording medium including a recording film having at least a reproduction layer, an intermediate layer, and a recording layer, on an optical disk substrate, wherein the recording film is a magnetic film that is magnetically coupled and that has magnetic anisotropy in a direction vertical to its film surface, the recording magnetic domains formed in the recording layer are transferred to the reproduction layer, and recording information is reproduced by domain wall movement in the reproduction layer, and the recording layer has columnar structures that are oriented substantially vertically. Thus, it is possible to provide a magneto-optical recording medium with which signals below the diffraction limit of the light spot for recording and reproducing information can be reproduced at high speed, with which the recording density and the transfer speed can be significantly increased, and with which stable recording magnetic domains can be formed even if recorded at high density.
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Birukawa Masahiro
Murakami Motoyoshi
Sakaguchi Takeshi
Dinh Tan
Hamre Schumann Mueller & Larson P.C.
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