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. 14, 2022
Filed:
Mar. 24, 2020
Applicant:
Denka Company Limited, Tokyo, JP;
Inventors:
Yusuke Takeda, Tokyo, JP;
Tomohiro Nomiyama, Tokyo, JP;
Marina Takamura, Tokyo, JP;
Tatsuya Okuzono, Tokyo, JP;
Masaru Miyazaki, Tokyo, JP;
Shintaro Watanabe, Tokyo, JP;
Assignee:
DENKA COMPANY LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/00 (2010.01); H01L 33/62 (2010.01); C09K 11/77 (2006.01); H01L 33/50 (2010.01);
U.S. Cl.
CPC ...
C09K 11/77348 (2021.01); H01L 33/502 (2013.01);
Abstract
A phosphor powder composed of α-sialon phosphor particles containing Eu. With regard to the phosphor powder, a volume-based median diameter (D) determined by a laser diffraction scattering method is equal to or more than 10 μm and equal to or less than 20 μm, and a diffuse reflectance with respect to light at a wavelength of 600 nm is equal to or more than 93% and equal to or less than 99%.