OPTICAL INFORMATION RECORDING MEDIUM

PROBLEM TO BE SOLVED: To provide an optical information recording medium having a protrusion part protecting a transparent protective layer and reducing a load to a motor at the time of rotation and capable of obtaining larger disk holding force. SOLUTION: In the optical data recording medium having...

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Bibliographische Detailangaben
Hauptverfasser:	MORI MASANARI, HAYASHI KAZUHIDE, ONO EIJI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PERFORMING OPERATIONS PHYSICS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an optical information recording medium having a protrusion part protecting a transparent protective layer and reducing a load to a motor at the time of rotation and capable of obtaining larger disk holding force. SOLUTION: In the optical data recording medium having a signal substrate, a signal recording layer and the transparent protective layer provided on the signal recording layer and having 10 to 200 μm thickness and further having a center hole, recording or reproduction of data is performed by irradiating the signal recording layer with light through the transparent protective layer, a holding region is formed in a region between a signal region corresponding to a region where the signal recording layer is formed and the center hole, the protrusion part protruding from the surface of the transparent protective layer is provided on a light incident surface side in a region interposed between the center hole and the holding region and the protrusion part is formed by using a material different from the material of the transparent protective layer. COPYRIGHT: (C)2007,JPO&INPIT