Optical recording medium and production method therefor

Details Optical recording medium and production method therefor Optical recording medium and production method therefor

2005-08-02

2005-08-02

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064500, C430S270130

Reexamination Certificate

active

06924019

ABSTRACT:
It is an object of the present invention to provide an optical recording medium wherein hardness of the surface on the incident-light side is high and warping of the optical recording medium is suppressed.The optical recording medium according to the present invention comprises a substrate11, a recording layer14provided upon the substrate11, a light transmission layer16made of ultraviolet curable resin provided upon the functional layer16, and a hard-coat layer17provided upon the light transmission layer16, wherein the thickness of the light transmission layer16is 50 μm or greater and its pencil hardness is HB or less. Thereby, warping of the optical recording medium arising due to cure shrinkage of the ultraviolet curable resin making up the light transmission layer16can be effectively suppressed. Moreover, the hard-coat layer17is provided upon this light transmission layer16, so the occurrence of scratches on the surface of the optical recording medium can be effectively prevented.

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