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:
Jun. 13, 2017
Filed:
Oct. 06, 2014
Applicant:
National Institute for Materials Science, Tsukuba-shi, Ibaraki, JP;
Inventors:
Assignee:
NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/77 (2006.01); C09K 11/08 (2006.01); H01L 33/50 (2010.01); H01L 51/50 (2006.01);
U.S. Cl.
CPC ...
C09K 11/7734 (2013.01); C09K 11/0883 (2013.01); H01L 33/502 (2013.01); H01L 51/5036 (2013.01); H01L 2224/45144 (2013.01); H01L 2224/48091 (2013.01); H01L 2224/48247 (2013.01); H01L 2224/73265 (2013.01); H01L 2224/8592 (2013.01); H01L 2924/181 (2013.01);
Abstract
A fluorophor includes: α-type sialon crystal which is expressed by a general formula: (Li, Eu)(SiAl)(ON), wherein x1 is an amount of solid solution of Li in a sialon unit cell, and x2 is an amount of solid solution of Eu in the sialon unit cell, wherein the parameters x1, x2, m, and n satisfy: 1.6≦x1≦2.4 (1), 0.001≦x2≦0.4 (2), 1.8≦m≦2.4 (3), 0.8≦n≦1.2 (4), wherein the α-type sialon crystal emits fluorescence with a peak in a wavelength region of from 550 nm to 575 nm upon irradiation of an excitation source.