Optical recording medium having two superimposed recording level

Details Optical recording medium having two superimposed recording level Optical recording medium having two superimposed recording level

1998-06-18

2000-06-20

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 13, G11B 724

Patent

active

060785586

ABSTRACT:
An optical recording medium including a first recording level including a first active film having amorphous areas and crystalline areas, the first recording level being configured to produce a phase difference between an optical beam reflected by the amorphous areas and an optical beam reflected by the crystalline areas; and a second recording level superimposed on the first recording level and including a second active layer with first areas and second areas, the second recording level being configured to produce an intensity difference between an optical beam reflected by the first areas and an optical beam reflected by the second areas.

REFERENCES:
patent: 5153873 (1992-10-01), Spruit et al.
patent: 5255262 (1993-10-01), Best et al.
patent: 5479382 (1995-12-01), Nishida et al.
patent: 5577021 (1996-11-01), Nakatani et al.
patent: 5581539 (1996-12-01), Horie et al.
patent: 5862123 (1999-01-01), Horie et al.
Patent Abstract of Japan, vol. 097, No. 003, Mar. 31, 1997, JP 08 315 415, Nov. 29, 1996.

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