Method for producing a disk-shaped substrate and method for producing an optical disk

a aa a a A method for producing a disk-shaped substrate used for producing an optical disk includes: (a) forming a protective layer that is larger in area than the disk-shaped substrate on a surface of a transparent plate ; and (b) cutting a portion of the plate with the protective layer formed ther...

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Bibliographic Details
Main Authors Hayashi, Kazuhiro, Hisada, Kazuya, Ohno, Eiji
Format Patent
LanguageEnglish
Published 05.09.2006
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Summary:a aa a a A method for producing a disk-shaped substrate used for producing an optical disk includes: (a) forming a protective layer that is larger in area than the disk-shaped substrate on a surface of a transparent plate ; and (b) cutting a portion of the plate with the protective layer formed thereon other than an outer edge portion of the protective layer 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.