MANUFACTURING METHOD OF OPTICAL DISK

摘要

PROBLEM TO BE SOLVED: To provide an optical information recording medium having a substrate with in-groove pits formed thereon and capable of reducing a reproduction error rate by surely detecting signals from the pits, and its manufacturing method.

SOLUTION: Media information is not recorded on a recording layer by a drive but recorded in grooves of the substrate as emboss pits beforehand in a disk substrate manufacturing step.

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