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. 12, 2005
Filed:
Jul. 11, 2002
Applicants:
Toshiaki Hirano, Tokyo, JP;
Ken Itoh, Tokyo, JP;
Inventors:
Toshiaki Hirano, Tokyo, JP;
Ken Itoh, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J017/49 ;
U.S. Cl.
CPC ...
Abstract
A protection film for protecting a dielectric layer of an AC type PDP is formed such that impurity metal ion densities of the protection film of the PDP, which is aged, become 400 ppm or less, respectively, and the protection film contains three or more hydrogen atoms assuming that the total number of atoms of the protection film is 100.