Title:
光記録媒体用中間体、成形金型、成形機、および光記録媒体の製造方法
Document Type and Number:
Japanese Patent JP3976655
Kind Code:
B2
Abstract:
There is provided an intermediate for an optical recording medium, which can be uniformly coated with resin by the spin coating method without using a resin coating-assisting member, and allows formation of a central mounting hole without burrs. The intermediate comprises a hollow cylindrical protruding portion protruding from one surface on which functional layers are formed and a circular recess formed in a central portion of the other surface and having a diameter equal to that of the central mounting hole, and a temporary central hole formed to extend through a central portion of the recess and having a diameter smaller than that of the recess. The protruding portion has an outer diameter smaller than the diameter of the mounting hole and an inner diameter not smaller than the diameter of the temporary central hole, and has a central axis thereof substantially aligned with a center of the temporary central hole.
Inventors:
Atsushi Koyama
Mamoru Usami
Kenji Yamaya
Tomon Mikio
Mamoru Usami
Kenji Yamaya
Tomon Mikio
Application Number:
JP2002282159A
Publication Date:
September 19, 2007
Filing Date:
September 27, 2002
Export Citation:
Assignee:
tdk Corporation
International Classes:
B29C45/37; G11B7/26; B29C45/26; B29C45/38; B29D17/00; B29C41/04; B29C41/20; B29C45/56; B29L17/00
Domestic Patent References:
| JP2002260278A | ||||
| JP2001273678A | ||||
| JP2001167472A | ||||
| JP10289489A | ||||
| JP10040584A | ||||
| JP5185477A | ||||
| JP5092492A |
Attorney, Agent or Firm:
Shinji Sakai