Title:
光記録媒体、光記録媒体の製造方法及び製造装置
Document Type and Number:
Japanese Patent JP4248197
Kind Code:
B2
Abstract:
An optical recording medium including a light transmitting layer having a uniform thickness formed on a substrate, in which a burr or stripping hardly occurs at the inner periphery of the light transmitting layer, and a manufacturing method and a manufacturing device of the optical recording medium are provided. An optical recording medium 10 is manufactured by a manufacturing method including: molding a disc-like shaped substrate 12 including an information recording face 12A on one side; forming a light transmitting layer 14 thinner than the substrate 12 on the information recording face 12A; forming a circular cut 16 in the light transmitting layer 14; and punching out an area inside the cut 16 by a punching tool 18 to form a center hole 14A in the light transmitting layer 14 and a center hole 20 in the substrate 12.
Inventors:
Tomoki Yuda
Mamoru Usami
Kenji Yamaya
Mamoru Usami
Kenji Yamaya
Application Number:
JP2002196415A
Publication Date:
April 02, 2009
Filing Date:
July 04, 2002
Export Citation:
Assignee:
tdk Corporation
International Classes:
B26D3/08; B26D9/00; B26F1/38; B29D17/00; G11B7/24; G11B7/24047; G11B7/24056; G11B7/26; G11B23/00
Domestic Patent References:
| JP2001167472A | ||||
| JP10283683A |
Attorney, Agent or Firm:
Keisuke Matsuyama
Satoshi Takaya
Tsuyoshi Makino
Satoshi Takaya
Tsuyoshi Makino