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:
Mar. 09, 2021
Filed:
Sep. 30, 2016
Denka Company Limited, Chuo-ku, Tokyo, JP;
Denka Company Limited, Tokyo, JP;
Abstract
The purpose of the present invention is to provide a fluoride phosphor (represented by the general formula ASiF:Mn) having high luminescence intensity and reliability, a high-luminance light-emitting device using this phosphor, and a production method for this phosphor. The production method for a fluoride phosphor represented by the general formula ASiF:Mn (where element A is an alkali metal element including at least potassium), wherein the fluoride phosphor production method comprises: a step of preparing an aqueous solution wherein element A and fluorine are dissolved in a solvent; and a step of adding, to the aqueous solution, solid silicon dioxide and a manganese compound that supplies manganese having a valence other than +7; wherein an added amount of the manganese compound is within a range such that an Mn content in the fluoride phosphor becomes at least 0.1 mass % and at most 1.5 mass %; and the fluoride phosphor precipitates as the silicon dioxide concurrently dissolves into the aqueous solution.