公开(公告)号：US20180134955A1

公开(公告)日：2018-05-17

申请号：US15849000

申请日：2017-12-20

Applicant: NICHIA CORPORATION

Inventor： Masato YOSHIDA ,  Koji KAJIKAWA

IPC: C09K11/61 ,  H01L33/56 ,  H01L33/50 ,  C09K11/02 ,  C09K11/77

CPC classification number: C09K11/617 ,  C09K11/025 ,  C09K11/7709 ,  H01L33/504

Abstract: A method for producing a fluorescent material can be provided. The method includes preparing fluorescent material particles that contain a fluoride having a composition including Mn, at least one selected from the group consisting of alkali metal elements and NH4+, and at least one selected from the group consisting of Group 4 elements and Group 14 elements; causing at least one cation selected from rare-earth elements and a phosphate ion to come into contact with each other in a liquid medium containing the fluorescent material particles to obtain rare-earth phosphate-adhered fluorescent material particles including the fluorescent material particles to which the rare-earth phosphate is adhered; and separating the rare-earth phosphate-adhered fluorescent material particles from the liquid medium.

公开(公告)号：US20170283695A1

公开(公告)日：2017-10-05

申请号：US15467155

申请日：2017-03-23

Applicant: NICHIA CORPORATION

Inventor： Masato YOSHIDA ,  Koji KAJIKAWA

IPC: C09K11/61 ,  H01L33/56 ,  H01L33/50 ,  C09K11/77 ,  C09K11/02

CPC classification number: C09K11/617 ,  C09K11/025 ,  C09K11/7709 ,  H01L33/504

Abstract: A method for producing a fluorescent material can be provided. The method includes preparing fluorescent material particles that contain a fluoride having a composition including Mn, at least one selected from the group consisting of alkali metal elements and NH4+, and at least one selected from the group consisting of Group 4 elements and Group 14 elements; causing at least one cation selected from rare-earth elements and a phosphate ion to come into contact with each other in a liquid medium containing the fluorescent material particles to obtain rare-earth phosphate-adhered fluorescent material particles including the fluorescent material particles to which the rare-earth phosphate is adhered; and separating the rare-earth phosphate-adhered fluorescent material particles from the liquid medium.

公开(公告)号：US20230383183A1

公开(公告)日：2023-11-30

申请号：US18324113

申请日：2023-05-25

Applicant: NICHIA CORPORATION

Inventor： Ryuta MIYAI ,  Kohei KUNIMOTO ,  Masato YOSHIDA ,  Kazuya NISHIMATA

IPC: C09K11/77 ,  C01B25/10 ,  H01L33/50

CPC classification number: C09K11/7739 ,  C01B25/10 ,  H01L33/502 ,  C01P2006/60 ,  C01P2002/72 ,  C01P2002/50

Abstract: The halophosphate phosphor includes a halophosphate including an alkaline earth metal including at least calcium; europium; and a halogen including at least chlorine. An elution amount of chlorine ions after the halophosphate phosphor is brought into contact with 10 times by mass of pure water at 85° C. for five hours is 7 ppm or less.

公开(公告)号：US20230018663A1

公开(公告)日：2023-01-19

申请号：US17809709

申请日：2022-06-29

Applicant: NICHIA CORPORATION

Inventor： Masato YOSHIDA

IPC: C09K11/64 ,  C01B33/10 ,  C09K11/77

Abstract: Provided is a method for producing a fluoride phosphor. The method includes: providing a first solution containing an element M1 containing at least one selected from the group consisting of group 13 elements, manganese, and fluorine, a second solution containing an element M2 containing at least one selected from the group consisting of group 4 elements and group 14 elements, and a third solution containing at least one selected from the group consisting of alkali metal elements; and adding the second solution and the third solution to the first solution at substantially the same time.