Overwriting system for magneto-optical recording

Details Overwriting system for magneto-optical recording Overwriting system for magneto-optical recording

G - Physics

11

B

352/32.1

G11B 11/12 (2006.01) G11B 11/03 (2006.01) G11B 11/105 (2006.01) G11B 13/04 (2006.01)

Patent

CA 1305252

Abstract of the Disclosure Modulating the intensity of directed energy for thermal writing of memory cells overwrites bits of either state in a storage layer of magnetic material irrespective of the preexisting condition of the cell without employing a magnetic field whose origin is external to the storage layer. Directed energy is synchronized with the medium by superimposing, preferably nonmagnetically, self-timing information on the medium itself and synchronously recovering the self-timing information to assist in directing energy to the medium. The medium itself has a magnetic layer plus recoverable timing information fixed in the medium along a predetermined path preferably embodied in a fixed periodic uniform variation in the nonmagnetic reflection properties along the track.

570046

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