Optical recording medium having two separate recording layers

Details Optical recording medium having two separate recording layers Optical recording medium having two separate recording layers

1996-04-05

1998-06-09

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 94, G11B 724

Patent

active

057646198

ABSTRACT:
In an optical information recording medium having at least two information layer, guide grooves for tracking or sample pits or information pits corresponding to information signals are formed on a surface of a first substrate. A first information layer formed by a thin film for reflecting a portion of a light beam made incident on the first substrate and permitting penetration of a portion of the light beam is formed on a surface of the first substrate. Guide grooves for tracking or information pits corresponding to information signals are formed on a surface of a second substrate. A second information layer having a reflectance higher than that of the first information layer is formed on a surface of the second substrate. Between the first information layer and the second information layer, there is formed a transparent separation layer for positioning the first information layer and the second information layer to be spaced a predetermined distance apart from each other.

REFERENCES:
patent: 3855426 (1974-12-01), Bouwhuis
patent: 4090031 (1978-05-01), Russell
patent: 4097895 (1978-06-01), Spong
patent: 4188433 (1980-02-01), Dijkstra et al.
patent: 4310919 (1982-01-01), Slaten
patent: 4450553 (1984-05-01), Holster et al.
patent: 4815060 (1989-03-01), Nomura
patent: 4917751 (1990-04-01), Ohta et al.
patent: 4990208 (1991-02-01), Kano
patent: 5013107 (1991-05-01), Biles
patent: 5023439 (1991-06-01), Noda et al.
patent: 5059473 (1991-10-01), Takahashi et al.
patent: 5093174 (1992-03-01), Suzuki et al.
patent: 5126996 (1992-06-01), Iida et al.
patent: 5200948 (1993-04-01), Goldberg et al.
patent: 5235591 (1993-08-01), Nakamura et al.
patent: 5251198 (1993-10-01), Strickler
patent: 5318653 (1994-06-01), Toide et al.
patent: 5373499 (1994-12-01), Imaino et al.
patent: 5381401 (1995-01-01), Best et al.
patent: 5449590 (1995-09-01), Imaino et al.
patent: 5485452 (1996-01-01), Maeda
patent: 5499231 (1996-03-01), Fennema et al.
patent: 5511057 (1996-04-01), Holtslag et al.
patent: 5513170 (1996-04-01), Best et al.
patent: 5540966 (1996-07-01), Hintz
patent: 5555537 (1996-09-01), Imaino et al.
patent: 5627816 (1997-05-01), Ito et al.

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