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:
Feb. 03, 2015
Filed:
Mar. 02, 2011
Hiroaki Kishioka, Ibaraki, JP;
Hiroaki Fumoto, Ibaraki, JP;
Masayuki Okamoto, Ibaraki, JP;
Masahito Niwa, Ibaraki, JP;
Hiroaki Kishioka, Ibaraki, JP;
Hiroaki Fumoto, Ibaraki, JP;
Masayuki Okamoto, Ibaraki, JP;
Masahito Niwa, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, JP;
Abstract
Provided is an optical pressure-sensitive adhesive sheet which excels in whitening resistance and high-temperature bonding reliability and exhibits superior bump absorptivity. The optical pressure-sensitive adhesive sheet according to the present invention includes an acrylic pressure-sensitive adhesive layer and has a moisture content of 0.65 percent by weight or more after storage in an environment of 60° C. and 95 percent relative humidity for 120 hours, in which the acrylic pressure-sensitive adhesive layer contains an acrylic polymer and has a storage shear modulus at 23° C. of from 0.8×10to 5.0×10Pa, and the acrylic polymer is formed from, as an essential monomer component, a monomer that will form a homopolymer having a glass transition temperature of −10° C. or higher.