Optical disk having information pits with projections formed the

Details Optical disk having information pits with projections formed the Optical disk having information pits with projections formed the

1998-06-12

1999-12-28

Dinh, Tan

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

428 644, G11B 724

Patent

active

060090715

ABSTRACT:
An optical disk with an improved structure of an information pit, and a method of manufacturing the same. The optical disk has projections respectively projecting from bottom surfaces of a plurality of information pits. Also, in the optical disk, laser beams irradiated onto the information pits from an optical pickup to read information recorded on the optical disk are scattered by the projections. Thus, among the laser beams irradiated onto the information pits, the laser beams reflected toward the optical pickup are largely decreased, so that an amplitude and resolution of a reproduced signal are greatly increased, thereby significantly improving reproduction characteristics of the optical disk.

REFERENCES:
patent: 4674070 (1987-06-01), Tajima et al.
patent: 5353277 (1994-10-01), Yasuda et al.
patent: 5602824 (1997-02-01), Ooki et al.
patent: 5673250 (1997-09-01), Mieda et al.
patent: 5799007 (1998-08-01), Lee et al.
patent: 5904969 (1999-05-01), Kamezaki et al.

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