Phase change optical recording medium

Details Phase change optical recording medium Phase change optical recording medium

1992-01-28

1993-08-10

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 4284111, 428688, 428913, 346 76L, 3461351, 430945, 369288, B32B 300

Patent

active

052347370

ABSTRACT:
A phase change optical recording medium in which a recording layer is formed on a substrate whose optical characteristic changes with crystal and amorphous phase change. With a phase change optical recording medium according to the invention, the difference in refractivity between crystal and amorphous parts is large, and therefore the error in the reproduction of data is lessened and the average reflectivity is large so that the servo operation is made stable. Further, the thickness of the recording layer can be reduced according to the invention, and the amount of energy required for recording data can be reduced as much, so as to increase the number of times of recording operations, and improve the recording sensitivity.

REFERENCES:
patent: 5063097 (1991-11-01), Hirota et al.

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