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. 25, 2023
Filed:
Mar. 11, 2019
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Tatsuya Terui, Tokyo, JP;
Masato Sato, Tokyo, JP;
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/77 (2006.01); H01L 33/50 (2010.01);
U.S. Cl.
CPC ...
C09K 11/7721 (2013.01); H01L 33/502 (2013.01);
Abstract
A phosphor and a light source device having the phosphor having a high internal quantum yield by enabling a large Ce amount, capable of shifting the fluorescence wavelength of yellow fluorescence to the long wavelength side, having satisfactory heat quenching resistance, and excellent in blue light transmittance. The phosphor includes a Ce:YAG single crystal having a Ce amount of 0.7 parts by mole or more when the total amount of Y and Ce is 100 parts by mole.