Optical recording medium
AssigneeMinnesota Mining and Manufacturing Company
InventorsWilliam B. Robbins, Richard F. Willson, Robert P. Freese
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Abstract
An optical recording medium containing a light-absorbing film of refractory material less than 60 nm thick and selected from carbides of Al, Hf, Nb, Ta, Ti, V, W, and Zr and alloys herebetween, whereupon localized heating of the light-absorbing film enables information storage in the form of localized features in the heated areas which can subsequently be optically detected and can be used as a master information record for replication purposes.
Claims19
An optical recording medium comprising a substrate and a light-absorbing layer having a thickness in the range of 1-60 nm in which information is recordable in the form of discrete features creatable by a focused, modulated laser beam, wherein the improvement comprises:
- said light-absorbing layer comprising a refractory material formed of carbides of aluminum, hafnium, niobium, tantalum, titanium, vanadium, tungsten and zirconium and alloys therebetween.
Dependencies are inferred from the claim text.