Optical recording medium and stamper for manufacturing the same

Details Optical recording medium and stamper for manufacturing the same Optical recording medium and stamper for manufacturing the same

2005-08-23

2005-08-23

Neyzari, Ali (Department: 2655)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S044260, C428S064400

Reexamination Certificate

active

06934244

ABSTRACT:
Disclosed is an optical recording disk which records information using lands and grooves and has a shallow & deep groove structure in which groove is different in depth from the other groove adjacent thereto. In the optical recording disk, a playback signal is stabilized by setting the level ratio of an AC component of a sum signal to a DC component of the sum signal in a plurality of spots to be equal to or smaller than a predetermined value.

REFERENCES:
patent: 5940364 (1999-08-01), Ogata et al.
patent: 6165579 (2000-12-01), Nakamura
patent: 6215758 (2001-04-01), Horimai et al.
patent: 6778474 (2004-08-01), Nishi

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