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Title:
OPTICAL RECORDING MEDIUM AND METHOD AND DEVICE FOR MANUFACTURING OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2004039149
Kind Code:
A
Abstract:

To provide an optical recording medium formed on a substrate so that a light transmitting layer has a uniform thickness and burrs and peeling are almost not generated on the inner peripheral part of the light transmitting layer and a method and a device for manufacturing the optical recording medium.

The optical recording medium 10 is manufactured by the manufacturing method including a molding process for molding a circular substrate 12 whose one face is an information recording surface 12A, a light transmitting layer forming process for forming a light transmitting layer 14 thinner than the substrate 12 on the information recording surface 12A, a notching process for forming a circular notch 16 on the light transmitting layer 14, and a punching process for respectively forming center holes 14A, 20 on the light transmitting layer 14 and the substrate 12 by punching the inner area of the notch 16 by a punching tool 18.


Inventors:
USHITA TOMOKI
USAMI MAMORU
YAMAYA KENJI
Application Number:
JP2002000196415
Publication Date:
February 05, 2004
Filing Date:
July 04, 2002
Export Citation:
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Assignee:
TDK CORP
International Classes:
B26D3/08; B26D9/00; B26F1/38; B29D17/00; G11B7/26; G11B23/00; (IPC1-7): G11B7/24; G11B7/26
Attorney, Agent or Firm:
松山 圭佑
高矢 諭
牧野 剛博