Information recording medium

Details Information recording medium Information recording medium

2007-08-21

2007-08-21

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275400

Reexamination Certificate

active

10701077

ABSTRACT:
A groove track and a land track are alternately and spirally formed on an information recording medium. On the land track neighboring the groove track, pre-information indicating position information of a track on a disc is formed as a prepit. On the information recording medium, an embossed area is formed so that information about a copyright and for preventing an illegal copy cannot be rewritten. In the embossed area, an embossed configuration including a pit and a space of predetermined depths is formed. The prepit in the embossed area is formed so that the prepit has an optimized configuration according to a pit length and a space length in the embossed area which the prepit neighbors. Consequently, interference between the embossed configuration and the prepit can be prevented even in a case that the prepit is formed in addition to the embossed configuration in the embossed area.

REFERENCES:
patent: 6477136 (2002-11-01), Sakurai et al.
patent: 6683844 (2004-01-01), Kuroda
patent: 6687214 (2004-02-01), Kato et al.
patent: 6741548 (2004-05-01), Muramatsu et al.
patent: 6807144 (2004-10-01), Kim et al.
patent: 6847604 (2005-01-01), Ueki
patent: 6930969 (2005-08-01), Yamaguchi et al.
patent: 6952393 (2005-10-01), Muramatsu et al.

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