Optical disk having a high-density recording layer and a low den

Details Optical disk having a high-density recording layer and a low den Optical disk having a high-density recording layer and a low den

1996-05-30

1997-12-09

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369283, 428694ML, G11B 724

Patent

active

056967543

ABSTRACT:
The present invention relates to an optical disk having a high density information recording layer for recording information at high density and an information recording layer which stores information at a density lower than the high density information recording layer. The optical disk also has a light incidence surface which is formed on the opposite side from the second information recording layer, where, the thickness of the disk from the light incidence surface to the second information recording layer is made the same as the thickness of the disk.

REFERENCES:
patent: 4441179 (1984-04-01), Slaten
patent: 4450553 (1984-05-01), Holster et al.
patent: 4503531 (1985-03-01), Kato
patent: 4984231 (1991-01-01), Yasuoka et al.
patent: 5381401 (1995-01-01), Best et al.
patent: 5485452 (1996-01-01), Maeda
patent: 5540966 (1996-07-01), Hintz

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