Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1996-03-28
1999-01-26
McPherson, John A.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430945, 3692752, 3692754, 369284, G11B 724
Patent
active
058637028
ABSTRACT:
An optical recording medium having each of a land and a groove and comprises at least a recording layer, dielectric layers and reflection layer. Recording and erasing of data can be carried out on both land and groove by a phase change between amorphous and crystalline states. The mirror portion may have reflectance characteristics selected from at least one of a reflectance of more than 15% and no more than 35%, when in a crystalline state, and 10% or less, when in an amorphous state. Alternatively, additionally, the depth of the groove may be such as form an optical path length equal to 1/7 to 1/5 of the wavelength of the reproducing light and the photo-absorbance of the recording layer in the amorphous phase and the photo-absorbance in the crystalline phase may satisfy the following formula,
REFERENCES:
patent: 5273861 (1993-12-01), Yamada et al.
patent: 5424106 (1995-06-01), Yamada et al.
patent: 5527661 (1996-06-01), Akahira et al.
Amioka Takao
Hirota Kusato
Nagino Kunihisa
Nobumasa Hitoshi
Ohbayashi Gentaro
McPherson John A.
Toray Industries Inc.
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