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
1992-12-28
1993-12-28
Wright, Lee C.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430272, 430273, 430275, 430290, 430346, 430495, 430945, 3461351, G03C 172, G11B 724
Patent
active
052738612
ABSTRACT:
A rewritable optical information recording medium of phase-change type wherein the recording, erasing, reproduction and rewriting of information are effected by irradiation of a high density energy flux such as laser beams. With the aim of obtaining a high erasing ratio in overwriting using a single laser beam, a constitution of medium has been devised whereby the same temperature-rise profile can be obtained for both the recorded mark part and the unrecorded (erased) part of the recording film. For example, by selecting the film thickness of each layer such that the optical absorbance at the wavelength of irradiation light source is the same in both the recorded part and the unrecorded part, an erasing ratio of -30 dB or more has been attained.
REFERENCES:
patent: 4633273 (1986-12-01), Watanabe et al.
patent: 4670345 (1987-06-01), Morimoto et al.
patent: 4710899 (1987-12-01), Young et al.
patent: 4743526 (1988-05-01), Ando et al.
patent: 4847132 (1989-07-01), Takao et al.
patent: 4879205 (1989-11-01), Suzuki
CRC Handbook of Chemistry and Physics, 63rd Edition pp. E202, E203.
High Speed Overwritable Phase Change Optical Disk Material, Noboru Yamada et al, Japanese Journal of Applied Physics, vol. 26 (1987), Supplement 26-4, pp. 61-66.
Nagata Ken'ichi
Nishiuchi Ken'ichi
Yamada Noboru
Matsushita Electric - Industrial Co., Ltd.
Wright Lee C.
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