Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1997-12-16
2000-06-06
Krynski, William
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428 641, 428 645, 428 646, 428 649, 428913, B32B 302
Patent
active
06071588&
ABSTRACT:
An optical recording medium has a high hardness layer, first dielectric layer, recording layer, second dielectric layer and reflective layer. The hardness of the high hardness layer is larger than the hardness of the first dielectric layer, and the thickness of the second dielectric layer is in the range of 3 to 50 nm. Such a rewritable phase change type optical recording medium may show reduced degradation in the write-start portion and write-end portion of frequently rewritten sectors, and have good jitter characteristics.
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Ohta et al, Phase Change Disk Media Having Rapid Cooling Structure, Proc. Int. Symp. on Optical Memory, p. 123, 1989.
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Arai Takeshi
Ashi Gentaro Ohbay
Nagino Kunihisa
Nobumasa Hitoshi
Watanabe Yuji
Krynski William
Toray Industries Inc.
Xu Hong J.
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