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. 21, 2007
Filed:
May. 22, 2003
Yuuzou Akada, Ibaraki, JP;
Toshiyuki Umehara, Ibaraki, JP;
Nobuyoshi Yagi, Ibaraki, JP;
Tadaaki Harada, Ibaraki, JP;
Yoshimasa Sakata, Ibaraki, JP;
Hidetoshi Yoshitake, Ibaraki, JP;
Yuuzou Akada, Ibaraki, JP;
Toshiyuki Umehara, Ibaraki, JP;
Nobuyoshi Yagi, Ibaraki, JP;
Tadaaki Harada, Ibaraki, JP;
Yoshimasa Sakata, Ibaraki, JP;
Hidetoshi Yoshitake, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, Osaka, JP;
Abstract
A resin sheet that is unlikely to be affected by heat and allows prevention of the occurrence of a crack is provided. A glass fiber cloth-like material is dipped into an epoxy resin solution and subjected to curing, thereby obtaining an epoxy resin-based sheet including the glass fiber cloth-like material. The resin sheet has a haze value of 10% or lower, and preferably, has a light transmittance of 88% or higher, an in-plane retardation of not more than 2 nm, a retardation in a thickness direction of 40 nm, and a surface roughness of not more than 2 μm.