Intermediate for optical recording medium, mold, molding...

Details Intermediate for optical recording medium, mold, molding... Intermediate for optical recording medium, mold, molding...

2006-11-21

2006-11-21

Hess, Bruce H. (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

C264S001330, C369S272100, C720S718000

Reexamination Certificate

active

07138165

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.

REFERENCES:
patent: 5541910 (1996-07-01), Tanaka et al.
patent: 2004/0149096 (2004-08-01), Ide et al.
patent: 2004/0191352 (2004-09-01), Koyama et al.
patent: 2004/0212122 (2004-10-01), Koyama et al.
patent: 2005/0053751 (2005-03-01), Komaki
patent: 2005/0201264 (2005-09-01), Ushida et al.
patent: 10-40584 (1998-02-01), None
patent: 10249264 (1998-09-01), None
English Language Abstract of JP 10-40584.
English Language Abstract of JP 10-249264.

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