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Patent Searching and Data


Title:
光記録媒体の製造方法および光記録媒体製造装置
Document Type and Number:
Japanese Patent JP4270830
Kind Code:
B2
Abstract:
When manufacturing an optical recording medium by forming a resin layer (3) on a surface (2a) of a substrate (2x) and then forming a center hole (1a) that passes through the substrate (2x) and the resin layer (3), a method of manufacturing an optical recording medium according to the present invention forms the center hole (1a) by forming, in the resin layer (3), a circular cut with a larger diameter than the center hole (1a) so as to surround a formation position of the center hole (1a) and then pressing in a punching blade (15) for forming the center hole from a rear surface (2b) side of the substrate (2x). By doing so, detachment of the resin layer (3) and the production of burrs at or near the center hole (1a) can be avoided while reducing the manufacturing cost.

Inventors:
Mamoru Usami
Junichi Ide
Haruhiko Yamaguchi
Tomoki Yuda
Application Number:
JP2002276491A
Publication Date:
June 03, 2009
Filing Date:
September 24, 2002
Export Citation:
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Assignee:
tdk Corporation
International Classes:
G11B7/26; B26D7/18; B26F1/14; G11B7/24; B26F1/44
Domestic Patent References:
JP2004039149A
JP2001167472A
JP10283683A
Attorney, Agent or Firm:
Shinji Sakai