Optical recording medium and recording method for the same

Dynamic information storage or retrieval – Binary pulse train information signal – Having specific code or form generation or regeneration...

Reexamination Certificate

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C369S047210, C369S275300

Reexamination Certificate

active

07061850

ABSTRACT:
A main information area31capable of recording an information signal and a subsidiary information area32for recording subsidiary information that is different from the information signal are divided in one principal plane direction of a substrate, and an information layer for recording the information signal in the main information area31is provided also in the subsidiary information area32, and medium identification information for distinguishing the medium optically is recorded in the information layer of the subsidiary information area32without changing the shape of the information layer. As a result, the medium identification information can be recorded in an optical recording medium1stably. In particular, the initialization of a phase change type optical recording medium and the recording of the medium identification information can be performed at the same time, so that the production process can be simplified, and the production costs can be reduced.

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