OPTICAL RECORDING MEDIUM PRODUCING METHOD, AND OPTICAL RECORDING MEDIUM PRODUCING DEVICE

Title:

OPTICAL RECORDING MEDIUM PRODUCING METHOD, AND OPTICAL RECORDING MEDIUM PRODUCING DEVICE

Document Type and Number:

WIPO Patent Application WO/2004/029952

Kind Code:

A1

Abstract:

In this optical recording medium producing method, in producing an optical recording medium by forming a resin layer (3) on the face (2a) of a base material (2x) and then forming a center hole (1a) establishing communication between the base material (2x) and the resin layer (3), a circular cut larger in diameter than the center hole (1a) is formed in the resin layer (3) to surround the region where the center hole (1a) is formed and then the center hole (1a) is formed by pushing a center hole forming-purpose punching blade (15) into the base material (2x) from the back (2b) of the base material (2x). Thereby, the peeling of the resin layer (3) and the formation of burrs in the vicinity of the center hole (1a) can be avoided while achieving production cost reduction.

Inventors:

USAMI MAMORU (JP)
IDE JUNICHI (JP)
YAMAGUCHI HARUHIKO (JP)
USHIDA TOMOKI (JP)

Application Number:

PCT/JP2003/011941

Publication Date:

April 08, 2004

Filing Date:

September 18, 2003

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TDK CORP (JP)
USAMI MAMORU (JP)
IDE JUNICHI (JP)
YAMAGUCHI HARUHIKO (JP)
USHIDA TOMOKI (JP)

International Classes:

B26D7/18; B26F1/14; G11B7/26; G11B7/24; B26F1/44; (IPC1-7): G11B7/26

Foreign References:

JPH10289489A	1998-10-27
JPH1040584A	1998-02-13
JPS63203308A	1988-08-23
JPS61175946A	1986-08-07
JPS5845637A	1983-03-16
JPH05337899A	1993-12-21

Attorney, Agent or Firm:

Sakai, Shinji (Higashiterao Matsushiro-mach, Nagano-shi Nagano, JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: IMPROVED HYBRID DISCS

Next Patent: A FLUID DYNAMIC BEARING CONFIGURED WITH A ROTATING ORBITAL RING BETWEEN ROTOR AND STATOR