Optically readable information disc provided with a reflective optical structure
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United States of America Patent
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Apr 2, 1985
Grant Date -
N/A
app pub date -
May 17, 1982
filing date -
Feb 4, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optically readable information disc having a reflective optical structure which comprises a reflective layer which is composed of a nitride, carbide or boride of a transition metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium, niobium, molybdenum, lanthanum, tantalum and tungsten.
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