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:
Mar. 11, 2008
Filed:
Jan. 25, 2005
Mikio Hanafusa, Ibaraki, JP;
Mikio Hanafusa, Ibaraki, JP;
Nippon Mining & Metals Co., Ltd, Minato-Ku, Tokyo, JP;
Abstract
A copper foil with a blackened surface or layer wherein one or both surfaces of a copper foil is subject to black treatment, and having a color difference ΔL*≦−70 and chroma C*≦15 of a black-treated surface when measured by a color difference meter represented by black; ΔL*=−100, white; ΔL*=0. The copper foil with a blackened surface or layer is especially useful for a plasma display panel (PDP) and has superior shielding characteristics of effectively shielding electromagnetic waves, near infrared rays, stray light, outside light and the like, has sufficient contrast, has a deep blackened color, is able to limit the reflected light of incoming light from the outside and reflected light of outgoing light from a plasma display panel, and has superior etching characteristics.