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:
Sep. 17, 2019
Filed:
Mar. 15, 2017
Nichia Corporation, Anan-shi, Tokushima, JP;
NICHIA CORPORATION, Anan-shi, JP;
Abstract
A method of producing a fluorescent material that is capable of providing a light emitting device having excellent durability, a fluorescent material, and a light emitting device are provided. The method of producing the fluorescent material includes: preparing a calcined product having a chlorosilicate composition containing at least one element selected from the group consisting of Ca, Sr, and Ba, at least one element selected from the group consisting of Mg and Zn, at least one element selected from the group consisting of Eu, Ce, Tb, and Mn, Si, O, and Cl; and bringing the calcined product in contact with a fluorine-containing substance and heat-treating the calcined product in an inert gas atmosphere at a temperature in a range of 200° C. or more and 450° C. or less.