Invention Grant
- Patent Title: Fluoride fluorescent material and light emitting device
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Application No.: US15910735Application Date: 2018-03-02
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Publication No.: US10400166B2Publication Date: 2019-09-03
- Inventor: Tomokazu Yoshida , Shoji Hosokawa , Sadakazu Wakui , Toshiyuki Okazaki
- Applicant: NICHIA CORPORATION
- Applicant Address: JP Anan-shi
- Assignee: NICHIA CORPORATION
- Current Assignee: NICHIA CORPORATION
- Current Assignee Address: JP Anan-shi
- Agency: Hunton Andrews Kurth LLP
- Priority: JP2014-202266 20140930; JP2015-101820 20150519
- Main IPC: C09K11/61
- IPC: C09K11/61 ; H01L33/50

Abstract:
A method for producing a fluoride fluorescent material including: preparing a first solution containing manganese, a second solution containing at least one cation selected from the group consisting of K+, Li+, Na+, Rb+, Cs+, and NH4+, and a third solution containing at least one element selected from the group consisting of the elements from Groups 4 and 14 of the periodic table, and adding the first and third solutions dropwise, each at a rate of 0.3% or less of the total volume of the solution per minute to the second solution to obtain particles having a composition represented by formula (I): A2[M1−aMn4+aF6] (I) wherein A denotes at least one cation selected from the group consisting of K+, Li+, Na+, Rb+, Cs+, and NH4+; M denotes at least one element selected from the group consisting of the elements from Groups 4 and 14 of the periodic table; and a satisfies 0.04
Public/Granted literature
- US20180187075A1 FLUORIDE FLUORESCENT MATERIAL, METHOD FOR PRODUCING THE SAME, AND LIGHT EMITTING DEVICE Public/Granted day:2018-07-05
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