Optical recording medium having recording pits of different shap

Details Optical recording medium having recording pits of different shap Optical recording medium having recording pits of different shap

1998-01-26

1999-08-31

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

3692751, G11B 724

Patent

active

059462884

ABSTRACT:
A light-reproduction medium, data stored therein being reproduced by detecting light transmitted therethrough and/or light reflected therefrom, includes a substrate formed on a surface thereof with at least two recording pits having a different level from the surface of the substrate. Each of the recording pits has a cross-section selected from at least two different shapes, the cross-section being defined as viewed in a direction perpendicular to a direction in which the light-reproduction medium is moved relative to an optical head. A magnetic film is formed on the surface of the substrate.

REFERENCES:
patent: 5204852 (1993-04-01), Nakagawa et al.
patent: 5357499 (1994-10-01), Nomoto
patent: 5359591 (1994-10-01), Nomoto
patent: 5453969 (1995-09-01), Psaltis et al.
patent: 5471455 (1995-11-01), Jabr
patent: 5528576 (1996-06-01), Nishikawa
patent: 5559787 (1996-09-01), Nomoto
patent: 5572508 (1996-11-01), Satoh et al.
patent: 5577016 (1996-11-01), Inagaki et al.

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