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:
May. 11, 2004
Filed:
Nov. 19, 2001
Applicant:
Inventors:
Yoshihiko Yano, Tokyo, JP;
Tomoyuki Oike, Tokyo, JP;
Yukihiko Shirakawa, Tokyo, JP;
Katsuto Nagano, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 3/300 ;
U.S. Cl.
CPC ...
H01L 3/300 ;
Abstract
An object of the invention is to provide an EL phosphor laminate thin film and EL device which can emit light at a high luminance. The object is achieved by stacking a phosphor thin film and a dielectric thin film one on the other wherein the phosphor thin film comprises at least one compound selected from an alkaline earth thioaluminate, an alkaline earth thiogallate and an alkaline earth thioindate as a main component, and a rare earth element as a luminescence center, and the dielectric thin film comprises an alkaline earth-containing oxide and/or a titanium-containing oxide.