公开(公告)号：US10927298B2

公开(公告)日：2021-02-23

申请号：US16854507

申请日：2020-04-21

Applicant: NICHIA CORPORATION

Inventor： Kazuya Nishimata ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: C09K11/77 ,  C09K11/08 ,  H01L33/50 ,  H01L33/32 ,  H01L33/48 ,  H01L33/56 ,  H01L33/62

Abstract: A method for producing a nitride fluorescent material having high emission luminance can be provided. The method includes heat-treating a raw material mixture containing silicon nitride, silicon, an aluminium compound, a calcium compound, and a europium compound.

公开(公告)号：US11891556B2

公开(公告)日：2024-02-06

申请号：US18304004

申请日：2023-04-20

Applicant: NICHIA CORPORATION

Inventor： Shigeyuki Suzuki ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: B22F3/10 ,  C09K11/77

CPC classification number: C09K11/77348 ,  B22F3/1017 ,  C09K11/7731 ,  C09K11/7739 ,  C09K11/77346 ,  C09K11/77347

Abstract: A nitride phosphor having a composition containing Eu, Si, Al, N, and a group 2 element including at least one selected from the group consisting of Mg, Ca, Sr, and Ba. In the composition, a ratio of a total molar content of the group 2 element and Eu to a molar content of Al is 0.8 or more and 1.1 or less, a molar ratio of Eu is 0.002 or more and 0.08 or less, a molar ratio of Si is 0.8 or more and 1.2 or less, and a total molar ratio of Si and Al is 1.8 or more and 2.2 or less. The nitride phosphor has a first peak in a range of 17° 2θ or more and 19° 2θ or less and a second peak in a range of 34° 2θ or more and 35.5° 2θ or less in a CuKα powder X-ray diffraction pattern.

公开(公告)号：US11312900B2

公开(公告)日：2022-04-26

申请号：US16783630

申请日：2020-02-06

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki Watanabe ,  Shigeyuki Suzuki ,  Shoji Hosokawa

IPC: C09K11/08 ,  C09K11/02 ,  C09K11/77

Abstract: A method for producing a nitride fluorescent material includes preparing fluorescent material core particles having a composition containing Sr, Ca, Eu, Al, Si, and N, in which, when a molar ratio of Al in the composition is 1, a molar ratio of Sr is in a range of 0.45 or more and 1.1 or less, a molar ratio of Ca is in a range of more than 0 and less than 0.55, a molar ratio of Eu is in a range of more than 0 and 0.033 or less, a total molar ratio of Sr, Ca, and Eu is 1.1 or less, a molar ratio of Si is in a range of 0.81 or more and 1.21 or less, and a molar ratio of N is in a range of 2.25 or more and 3.85 or less, subjecting them to a first heat treatment and a second heat treatment.

公开(公告)号：US11136503B2

公开(公告)日：2021-10-05

申请号：US16801626

申请日：2020-02-26

Applicant: NICHIA CORPORATION

Inventor： Takayuki Shinohara ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: C09K11/77 ,  C09K11/08

Abstract: Provided is a method for producing a nitride fluorescent material including: preparing a raw material mixture including a hydride containing at least one first alkaline earth metal element, at least one compound containing at least one second alkaline earth metal element and selected from an amide compound and an imide compound, a compound containing europium, a compound containing aluminum, and a compound containing silicon, wherein at least one of the compound containing europium, the compound containing aluminum, and the compound containing silicon is a nitride; and subjecting the raw material mixture to a heat treatment to obtain the nitride fluorescent material.

公开(公告)号：US10590342B2

公开(公告)日：2020-03-17

申请号：US15682987

申请日：2017-08-22

Applicant: NICHIA CORPORATION

Inventor： Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: C09K11/77 ,  C09K11/08 ,  H01L33/50

Abstract: Provided is a method of producing a nitride fluorescent material containing silicon nitride particles containing Eu, at least one alkaline earth metal selected from the group consisting of Mg, Ca, Sr, and Ba, Al, and fluorine in a composition of the silicon nitride particles. The method includes heat treating a raw material mixture containing an Eu source, a source of the alkaline earth metal, an Al source, an Si source, and an alkaline earth metal fluoride containing at least one selected from the group consisting of Mg, Ca, Sr, and Ba, wherein a molar content ratio of fluorine atom to Al is from 0.02 to 0.3.

公开(公告)号：US09944851B2

公开(公告)日：2018-04-17

申请号：US15247083

申请日：2016-08-25

Applicant: NICHIA CORPORATION

Inventor： Kazuya Nishimata ,  Hiroyuki Watanabe ,  Shoji Hosokawa

IPC: H01L33/50 ,  C09K11/77 ,  C09K11/08 ,  H01L33/32 ,  H01L33/48 ,  H01L33/56 ,  H01L33/62

CPC classification number: C09K11/7734 ,  C09K11/0833 ,  C09K11/0883 ,  H01L33/32 ,  H01L33/486 ,  H01L33/502 ,  H01L33/504 ,  H01L33/56 ,  H01L33/62 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2933/0041 ,  H01L2924/00014

Abstract: A method for producing a nitride fluorescent material having high emission luminance can be provided. The method includes heat-treating a raw material mixture containing silicon nitride, silicon, an aluminum compound, a calcium compound, and a europium compound.