Read-only optical disk containing a reflective layer comprising an Al alloy containing Ta

Read-only optical disk containing a reflective layer comprising an Al alloy containing Ta

Disclosed herein is a read-only optical disk comprising an annulus transparent substrate of a synthetic resin having information pits thereon, a reflective layer comprising an Al alloy containing Ta and a protective layer provided thereover. The read-only optical disk according to the present invent...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KOBAYASHI, YOSHIMITSU, HASHIMOTO, TAKASHI, KAWANO, TOSHIFUMI, KISAKA, YOSHIYUKI, WAKABAYASHI, MITSUGU
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Beschreibung
Zusammenfassung:Disclosed herein is a read-only optical disk comprising an annulus transparent substrate of a synthetic resin having information pits thereon, a reflective layer comprising an Al alloy containing Ta and a protective layer provided thereover. The read-only optical disk according to the present invention is excellent in the corrosion resistance and has a high reliability.