Multi-layer optical recording medium

Details Multi-layer optical recording medium Multi-layer optical recording medium

1995-03-14

1998-03-10

Hindi, Nabil

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 94, G11B 724, G11B 374

Patent

active

057269700

ABSTRACT:
A novel multi-layer optical disc according to the present invention can treat a large volume of information without deterioration in level of reproduction signals from the respective information storage layers thereof. The multi-layer optical disc comprises a substrate having a light-transmission property, a read-only-memory type information storage portion formed on the substrate, a semi-transmission layer disposed on the read-only-memory type information storage portion, a spacer layer disposed on the semi-transmission layer and having a light-transmission property, and a rewritable information storage layer disposed on said spacer layer.

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