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:
Apr. 08, 2014
Filed:
Sep. 27, 2010
Naoki Taya, Tokyo, JP;
Takehito Nakayama, Tokyo, JP;
Hideharu Tajima, Osaka, JP;
Yasuhiro Harada, Osaka, JP;
Masaki Yamamoto, Osaka, JP;
Hirohisa Yamada, Osaka, JP;
Naoki Taya, Tokyo, JP;
Takehito Nakayama, Tokyo, JP;
Hideharu Tajima, Osaka, JP;
Yasuhiro Harada, Osaka, JP;
Masaki Yamamoto, Osaka, JP;
Hirohisa Yamada, Osaka, JP;
Lintec Corporation, Tokyo, JP;
Sharp Corporation, Osaka, JP;
Abstract
A pressure-sensitive adhesive sheetfor an optical data recording medium Dfrom which a signal with a mark length shorter than the resolution limit of an optical system of a reproducing device is capable of being reproduced by reproduction light emitted during reproducing, the pressure-sensitive adhesive sheethaving an adhesive transparent resin layerto be disposed on an data recording layerof the optical data recording medium D, the transparent resin layerhaving a (meth)acrylate copolymer containing no acidic group as a main component, the transparent resin layerhaving a storage elastic modulus at 23° C. of 1.5×10Pa or less and a gel fraction of 68 wt % or more. The transparent resin layerof this pressure-sensitive adhesive sheetfor an optical data recording medium can be used for producing an optical data recording medium which can reproduce from a mark with a length shorter than the resolution of an optical system of a reproducing device, and which is stable against changes in the external environment when responding to status of use.