Transmissive optical and magneto-optical data storage media and

Details Transmissive optical and magneto-optical data storage media and Transmissive optical and magneto-optical data storage media and

1998-02-14

1999-10-19

Evans, Elizabeth

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428 642, 428 644, 428 645, 428 646, 428 647, 428457, 428698, 428913, 43027013, 4304951, 430945, 3692751, 3692754, 369283, 369288, B32B 300

Patent

active

059686260

ABSTRACT:
An optical data storage medium transmissive to a laser beam and formed of a light transmissive substrate that provides mechanical support, and a light transmissive data substrate formed on the substrate. The data substrate is patterned to form block regions that block the laser beam from passing through, and pass regions that allow the laser beam to pass through, such that the blockage or passage of light through the optical storage medium reflects the type of data bits to be stored on the optical medium. In another embodiment a magneto-optical data storage medium which is also transmissive (or partly transmissive) to a laser beam includes a data magneto-optical data substrate formed on a substrate. The data substrate is recordable by patterning a magnetic domain with magnetic fields of opposite directions, such that each magnetic direction reflects the type of data bits to be stored on the optical medium. In yet another embodiment the data substrate includes a combination of block and pass regions as well as one or more writeable and/or recordable films.

REFERENCES:
patent: 5500266 (1996-03-01), Durnin
patent: 5574715 (1996-11-01), Namba et al.
patent: 5645909 (1997-07-01), Kobayashi et al.

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