Optical recording material, and optical recording medium

Details Optical recording material, and optical recording medium Optical recording material, and optical recording medium

1997-12-02

1999-04-06

Evans, Elizabeth

Stock material or miscellaneous articles

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428 642, 428 644, 428 645, 428688, 428697, 428913, 43027012, 4304951, 430945, 369283, 369288, B32B 300

Patent

active

058915427

ABSTRACT:
One object of the invention is to achieve a phase change type optical recording medium having high degree of modulation and recording sensitivity, and another object of the invention is to achieve a phase change type optical recording medium having already stable write/read characteristics at the time of the first overwriting. The optical recording medium comprises a recording layer made up of an optical recording material containing given amounts of In, Ag, Te and Sb. In one Raman spectrum embodiment of the optical recording there are a scattering peak I-1 having a Raman shift in a range of 113 to 117 cm.sup.-1 and a scattering peak I-2 having a Raman shift in a range of 123 to 127 cm.sup.-1, said scattering peak I-2 being larger in half-width than said scattering peak I-1. In another Raman spectrum embodiment, there are a scattering peak II-1 having a Raman shift in a range of 105 to 125 cm.sup.-1 and a scattering peak II-2 having a Raman shift in a range of 140 to 160 cm.sup.-1, said scattering peak II-1 being higher in intensity than said scattering peak II-2.

REFERENCES:
patent: 4947372 (1990-08-01), Koshino et al.
patent: 5058061 (1991-10-01), Koshino et al.
patent: 5385806 (1995-01-01), Ohno et al.

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