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. 20, 2017
Filed:
Sep. 07, 2007
Masahiro Gotoh, Tokyo, JP;
Kenji Sakane, Okayama, JP;
Masahiro Gotoh, Tokyo, JP;
Kenji Sakane, Okayama, JP;
NICHIA CORPORATION, Anan-Shi, JP;
CITIZEN ELECTRONICS CO., LTD., Fujiyoshida-Shi, JP;
Abstract
To reduce impurity contents of carbon and oxygen not contributing to light emission, then suppress deterioration of emission intensity of a phosphor, and improve emission efficiency of this phosphor. Therefore, there is provided a firing method of nitride or oxynitride phosphors, wherein a cruciblemade of nitride is used as a firing container, and firing is performed, with this crucible covered with a lid (container), to manufacture the phosphor. The phosphor is expressed by a general composition formula MABON:Z in which element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is an activating agent, satisfying o≧0.