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. 18, 2019
Filed:
Nov. 09, 2016
Nichia Corporation, Anan-shi, Tokushima, JP;
Sadakazu Wakui, Tokushima, JP;
Shoji Hosokawa, Tokushima, JP;
NICHIA CORPORATION, Anan-shi, JP;
Abstract
A method of producing a nitride fluorescent material having a high light emission intensity and including a calcined product having a composition represented by formula MMMMNis provided. Mis at least one element selected from Sr, Ca, Ba, and Mg; Mis at least one element selected from Li, Na, and K; Mis at least one element selected from Eu, Mn, Tb, and Ce; Mis at least one element selected from Al, B, Ga, and In; v, w, x, y, and z satisfy 0.8≤v≤1.1, 0.8≤w≤1.1, 0.001<x≤0.1, 2.0≤y≤4.0, and 3.0≤z≤5.0, respectively. The nitride fluorescent material includes elemental oxygen in a range of 2% or more and 4% or less by mass. The method includes mixing the calcined product with a polar solvent having a relative dielectric constant in a range of 10 or more and 70 or less at 20° C.