Optical disc manufacturing method and device, optical disc,...

Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...

Reexamination Certificate

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Details

C369S059230, C369S053200, C369S053220, C369S116000

Reexamination Certificate

active

08050163

ABSTRACT:
According to the present invention, there is provided a method of recording a unique ID to a read-only optical disc based on the 17PP modulation. The read-only optical disc (1) has set thereon a specific physical cluster to which a unique ID is to be recorded. With user data to be recorded to the specific physical cluster being made all zero (0), a pit/land pattern is formed, and a molding machine using a molding die is used to form many optical discs in the common manner. Thereafter, an ID unique to each optical disc is generated, and a land in a predetermined position in the specific physical cluster is transited to a pit by irradiating high-power laser light to the land correspondingly to the bit information, so that the pit/land pattern will comply the 17PP modulation rule even after the transition of the land to the pit.

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