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. 27, 2018
Filed:
Feb. 28, 2017
Applicant:
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Inventors:
Yumi Fukuda, Setagaya, JP;
Keiko Albessard, Yokohama, JP;
Yasushi Hattori, Kawasaki, JP;
Seiichi Suenaga, Yokohama, JP;
Assignee:
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/50 (2010.01); C09K 11/61 (2006.01);
U.S. Cl.
CPC ...
H01L 33/507 (2013.01); C09K 11/616 (2013.01); H01L 2933/0041 (2013.01);
Abstract
The embodiment of the present disclosure provides a phosphor improved in the emission intensity maintenance ratio without impairing the emission intensity. The phosphor is a silicofluoride phosphor and shows an IR absorption spectrum satisfying the conditions of 0≤I/I≤0.01 and 6.7≤(I/I)/C. In those conditional formulas, I, Iand Iare intensities of the maximum peaks in the ranges of 1200 to 1240 cm, 3570 to 3610 cmand 635 to 655 cm, respectively, and Cis a weight percent of Mn contained the phosphor.