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. 01, 2025
Filed:
Aug. 14, 2020
Applicant:
Denka Company Limited, Tokyo, JP;
Inventors:
Tomohiro Nomiyama, Tokyo, JP;
Manabu Kobayashi, Tokyo, JP;
Masaru Miyazaki, Tokyo, JP;
Tatsuya Okuzono, Tokyo, JP;
Assignee:
DENKA COMPANY LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 11/77 (2006.01); C01B 21/082 (2006.01); C09K 11/61 (2006.01); H01L 33/50 (2010.01); H01L 23/00 (2006.01);
U.S. Cl.
CPC ...
C09K 11/77348 (2021.01); C01B 21/0826 (2013.01); C09K 11/617 (2013.01); H01L 33/502 (2013.01); H01L 33/504 (2013.01); C01P 2002/54 (2013.01); C01P 2002/74 (2013.01); C01P 2004/61 (2013.01); H01L 24/48 (2013.01); H01L 2224/48175 (2013.01);
Abstract
A europium-doped β-sialon phosphor, in which, when the ratio of an aluminum element at a depth of 8 nm from the surface of the phosphor, which is obtained by X-ray photoelectron spectroscopy, is indicated by P[at %], and the ratio of an aluminum element at a depth of 80 nm from the surface of the phosphor is indicated by P[at %], P/P≤0.9 is satisfied. A light emitting device containing this β-sialon phosphor.