The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2005
Filed:
Aug. 27, 2002
Kazuki Suzawa, Tokyo, JP;
Mamoru Usami, Tokyo, JP;
Kazuki Suzawa, Tokyo, JP;
Mamoru Usami, Tokyo, JP;
TDK Corporation, Tokyo, JP;
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 substrate, a recording layerprovided upon the substrate, a light transmission layermade of ultraviolet curable resin provided upon the functional layer, and a hard-coat layerprovided upon the light transmission layer, wherein the thickness of the light transmission layeris 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 layercan be effectively suppressed. Moreover, the hard-coat layeris provided upon this light transmission layer, so the occurrence of scratches on the surface of the optical recording medium can be effectively prevented.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile