METHOD OF MANUFACTURING INFORMATION RECORDING MEDIUM SUBSTRATE

PROBLEM TO BE SOLVED: To efficiently provide an information recording medium substrate having high reliability and excellent productivity and free from breakage of an information recording medium from a part in the vicinity of a center hole by performing simultaneous and integral formation so that a...

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Bibliographische Detailangaben
Hauptverfasser: NAKANO ATSUSHI, ARAKAWA NORIYUKI, KAWAKUBO SHIN
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To efficiently provide an information recording medium substrate having high reliability and excellent productivity and free from breakage of an information recording medium from a part in the vicinity of a center hole by performing simultaneous and integral formation so that a metal thin plate is inserted in the center hole and a fine rugged signal is formed on a main surface when a glass substrate is heat/pressure molded. SOLUTION: The fine rugged signal is formed directly on at least one main surface of the glass substrate and the metal thin plate is simultaneously fixed to the center hole by heating and pressurizing the glass substrate. COPYRIGHT: (C)2009,JPO&INPIT