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. 04, 2015
Filed:
Mar. 06, 2012
Kenji Sakane, Tokyo, JP;
Akira Nagatomi, Tokyo, JP;
Kenji Sakane, Tokyo, JP;
Akira Nagatomi, Tokyo, JP;
Dowa Electronics Materials Co., Ltd., Tokyo, JP;
Nichia Corporation, Anan-shi, JP;
Abstract
To provide a phosphor having a broad emission spectrum with a peak in the range from yellow color to red color (wavelength from 570 nm to 620 nm), having a flat excitation band with large area on the long wavelength side from near ultraviolet/ultraviolet to green color (wavelength from 250 nm to 550 nm), and excellent in emission intensity and luminance, and a method of manufacturing the same, and also a light source such as white LED using the phosphor. As raw materials, CaN(2N), AlN(3N), SiN(3N), and EuO(3N) are prepared, and out of each raw material, 0.950/3 mol of CaN, 2 mol of AlN, 4/3 mol of SiN, and 0.050/2 mol of EuOare weighed, and the raw materials thus weighed are mixed by using a mortar. The raw materials thus mixed are put in a BN crucible, and retained/fired for 3 hours at 1700° C. in a nitrogen atmosphere, and thereafter cooled from 1700° C. to 200° C., to thereby obtain the phosphor expressed by a composition formulaCaAlSiON:Eu.