Phase change recording medium and method for recording therein a

Details Phase change recording medium and method for recording therein a Phase change recording medium and method for recording therein a

1998-11-30

2000-10-10

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 642, 428 644, 428 645, 428 646, 428913, 43027013, 4304951, 430945, 369283, 369288, B32B 300

Patent

active

061299685

ABSTRACT:
Disclosed is a phase change recording medium comprising a crystal section and an amorphous section, characterized in that the difference in reflectivity between the crystal section and the amorphous section is, for example, 15% or more when light with a wavelength of .lambda..sub.1 is applied and the difference in absorptivity between the crystal section and the amorphous section is, for example, 5% or less when light with a wavelength of .lambda..sub.2 is applied. Recording using light with a wavelength of .lambda..sub.2 brings about few opportunities of occurrence of cross-erasure because of a small difference in absorptivity between the crystal section and the amorphous section. Reproduction using light with a wavelength of .lambda..sub.1 after the recording using light with a wavelength of .lambda..sub.2 results in the production of satisfactorily regenerative signals because of a large difference in reflectivity between the crystal section and the amorphous section.

REFERENCES:
patent: 5862122 (1999-01-01), Okada
patent: 5974025 (1999-10-01), Yamada
patent: 6040030 (2000-03-01), Utsunomiya
patent: 6040066 (2000-03-01), Zhou

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