Method of manufacturing disk substrate, and method and device for manufacturing optical disk
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United States of America Patent
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app pub date -
Sep 3, 2004
filing date -
Apr 25, 2000
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Abandoned
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Abstract
A method for producing a disk-shaped substrate 10 used for producing an optical disk includes: (a) forming a protective layer 12a that is larger in area than the disk-shaped substrate 10 on a surface of a transparent plate 11a; and (b) cutting a portion of the plate 11a with the protective layer 12a formed thereon other than an outer edge portion of the protective layer 12a to form a disk shape. According to this producing method, a thin substrate can be prevented from being damaged by forming a protective layer. Furthermore, according to this producing method, a protective layer with a uniform thickness can be formed.
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