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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuhiro Hayashi, Kazuya Hisada, Eiji Ohno
Estimating the term…
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.
(Amended) A method for producing a disk-shaped substrate used for producing an optical disk, comprising the processes of:
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A method for producing an optical disk including a first substrate and a second substrate in which a signal area is to be formed on one principal plane, comprising the processes of:
An apparatus for producing an optical disk using a first substrate and a second substrate, comprising:
An apparatus for producing an optical disk including a first substrate and a second substrate in which a signal area is to be formed on one principal plane, comprising:
Dependencies are inferred from the claim text.