Method for optically recording information and information recor

Details Method for optically recording information and information recor Method for optically recording information and information recor

1990-03-23

1991-12-24

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428 76, 428412, 428457, 428913, 430495, 430945, 346 76L, 3461351, 369272, B32B 302

Patent

active

050751476

ABSTRACT:
A method of optically recording information on an information recording medium comprising a disc-shaped substrate having a pregroove comprising a groove having a depth of 800 to 2,000 angstroms and a half width of 0.2 to 0.7 .mu.m thereon, a recording layer comprising a dye for optically recording information by means of a laser beam which is provided on the substrate, and a reflecting layer of a metal which is provided on the recording layer is disclosed. The recording method is carried out by irradiating a bottom part of the pregroove having the recording layer thereon with a laser beam from the substrate side under rotation of the recording medium. Further, an information recorded medium which is recorded with information by the above method is also disclosed.

REFERENCES:
patent: 4940618 (1990-07-01), Hamada et al.
patent: 4943515 (1990-07-01), Okazaki et al.
patent: 4944967 (1990-07-01), Yabe et al.
patent: 4977064 (1990-12-01), Sukawa et al.

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