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    NITRIDE PHOSPHOR, METHOD FOR MANUFACTURING THE SAME, AND LIGHT EMITTING DEVICE
    2.
    发明申请
    NITRIDE PHOSPHOR, METHOD FOR MANUFACTURING THE SAME, AND LIGHT EMITTING DEVICE 有权

    公开(公告)号：US20220396731A1

    公开(公告)日：2022-12-15

    申请号：US17806442

    申请日：2022-06-10

    Applicant: NICHIA CORPORATION

    Inventor： Shigeyuki SUZUKI ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

    IPC: C09K11/77

    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.

    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL AND NITRIDE FLUORESCENT MATERIAL
    3.
    发明公开
    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL AND NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20240209256A1

    公开(公告)日：2024-06-27

    申请号：US18394693

    申请日：2023-12-22

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu WAKUI ,  Kohei KUNIMOTO ,  Hiroyuki WATANABE ,  Eishi KANAI

    IPC: C09K11/08 ,  C09K11/77

    CPC classification number: C09K11/0883 ,  C09K11/77347

    Abstract: A method of producing a nitride fluorescent material includes preparing a calcined product including a fluorescent material core, and a first film containing fluoride on a surface of the fluorescent material core, bringing the calcined product into contact with a solution containing a metal alkoxide containing an element M2 being at least one element selected from the group consisting of Si, Al, Ti, Zr, Sn, and Zn at a temperature equal to or lower than an ambient temperature and hydrolyzing and condensation-polymerizing the metal alkoxide to form a second film containing an oxide containing the element M2, and performing a heat-treatment at a temperature higher than 250° C. and equal to or lower than 500° C. The nitride fluorescent material includes the fluorescent material core having a composition containing an element Ma being at least one element selected from the group consisting of Sr, Ca, Ba, and Mg, an element Mb being at least one element selected from the group consisting of Li, Na, and K, an element Mc being at least one element selected from the group consisting of Eu, Ce, Tb, and Mn, Al, N, and optionally Si.

    NITRIDE PHOSPHOR AND MANUFACTURING METHOD THEREFOR
    4.
    发明公开
    NITRIDE PHOSPHOR AND MANUFACTURING METHOD THEREFOR 审中-公开

    公开(公告)号：US20230295497A1

    公开(公告)日：2023-09-21

    申请号：US18040647

    申请日：2021-08-05

    Applicant: NICHIA CORPORATION

    Inventor： Hiroshi OGASA ,  Shigeki YOSHIDA ,  Hiroyuki WATANABE

    IPC: C09K11/77 ,  C01B21/06

    CPC classification number: C09K11/77747 ,  C01B21/0602 ,  C01P2002/60 ,  C01P2002/50 ,  C01P2006/12 ,  C01P2004/61 ,  C01P2006/60 ,  C01P2004/03

    Abstract: Provided is a method for producing a nitride phosphor. The method includes obtaining a first heat-treated product having a crystallite diameter of not less than 150 nm by subjecting a compound containing at least one rare-earth element selected from the group consisting of Y, La, Ce, Lu, and Gd to heat treatment at a temperature within a range of 800° C. to 1800° C.; and obtaining a second heat-treated product by subjecting a mixture containing the first heat-treated product and a raw material contained as required to heat treatment at a temperature within a range of 1200° C. to 1800° C. The raw material contains an M source containing at least one rare-earth element M selected from the group consisting of Y, Lu, and Gd; an La source; an Si source; and a Ce source. The mixture is prepared with the raw materials such that a fed composition is represented by a Formula of LawMxSi6Ny:Cez. In this Formula, w, x, y, and z satisfy 0.5≤w≤4.5, 0

    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL
    5.
    发明申请
    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20200270519A1

    公开(公告)日：2020-08-27

    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.

    ß-SIALON FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    6.
    发明申请
    ß-SIALON FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 有权

    公开(公告)号：US20250101302A1

    公开(公告)日：2025-03-27

    申请号：US18894198

    申请日：2024-09-24

    Applicant: NICHIA CORPORATION

    Inventor： Yuya TAKAHASHI ,  Takashi KAIDE ,  Hiroyuki WATANABE

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

    Abstract: A β-SiAlON fluorescent material includes fluorescent material particles having a composition represented by the following formula (I), and a coating layer formed on the surface of the fluorescent material particles and having a refractive index smaller than that of the fluorescent material particles, wherein when the β-SiAlON fluorescent material is measured by inductively coupled plasma-atomic emission spectroscopy, an amount of the coating layer is 0.4% by mass or more relative to a total amount of the fluorescent material particles and the coating layer being 100% by mass: Si6-zAlzOzN8-z:Euy  (I), wherein y and z satisfy 0

    WAVELENGTH CONVERTER AND LIGHT EMITTING DEVICE
    7.
    发明申请
    WAVELENGTH CONVERTER AND LIGHT EMITTING DEVICE 有权

    公开(公告)号：US20220098483A1

    公开(公告)日：2022-03-31

    申请号：US17449340

    申请日：2021-09-29

    Applicant: NICHIA CORPORATION

    Inventor： Shigeki YOSHIDA ,  Hiroyuki WATANABE ,  Eri MATSUKA

    IPC: C09K11/77 ,  H01L33/50

    Abstract: The wavelength converter includes a support, and a wavelength conversion layer disposed on the support. The wavelength conversion layer contains a fluorescent layer containing a fluorescent material with a composition represented by formula (1) below, and having a thickness of from 5 μm to 155 μm. A ratio of a sum of cross-sectional areas of particles of the fluorescent material in a cross-section of the wavelength conversion layer orthogonal to a disposed surface of the wavelength conversion layer that is disposed on the support and including a full width of the wavelength conversion layer to a cross-sectional area of the cross-section of the wavelength conversion layer is from 5% to 40%. In the formula (1), M1 is at least one selected from the rare earth elements other than La and Ce; a total amount of yttrium (Y), gadolinium (Gd), and lutetium (Lu) by mole with respect to a total amount of M1 by mole is 90% or more; and p, q, r, and s satisfy 2.7≤p+q+r≤3.3, 0≤r≤1.2, 10≤s≤12, and 0

    LIGHT EMITTING DEVICE
    10.
    发明申请
    LIGHT EMITTING DEVICE 有权
    发光装置

    公开(公告)号：US20170005239A1

    公开(公告)日：2017-01-05

    申请号：US15196964

    申请日：2016-06-29

    Applicant: NICHIA CORPORATION

    Inventor： Kenji ASAI ,  Hiroyuki WATANABE ,  Shoji HOSOKAWA

    IPC: H01L33/50

    CPC classification number: H01L33/504 ,  C09K11/00 ,  C09K11/7734 ,  C09K11/7774 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2924/181 ,  H05B33/14 ,  H01L2924/00014 ,  H01L2924/00012

    Abstract: A light emitting device includes a light emitting element of a peak emission wavelength in a range of 430 nm to 470 nm and a fluorescent member. The fluorescent member includes a first phosphor including a silicate having a composition that contains at least one element selected from the group consisting of Ca, Sr, and Ba, at least one element selected from the group consisting of Cl, F, and Br, and Mg and Eu, a second phosphor including an aluminate that has a composition containing Lu and Ce, and a third phosphor having emission spectrum with a half bandwidth of 86 nm or less and including a silicon nitride that has a composition containing at least one of Sr or Ca, and containing Al and Eu.

    Abstract translation: 发光器件包括在430nm至470nm的范围内的峰值发射波长的发光元件和荧光部件。 荧光体包括含有具有选自Ca，Sr和Ba中的至少一种元素的组成的硅酸盐的第一荧光体，选自Cl，F和Br中的至少一种元素，以及 Mg和Eu，包含具有含有Lu和Ce的组成的铝酸盐的第二荧光体和具有86nm或更小的半带宽的发射光谱的第三荧光体，并且包括具有包含Sr的至少一种的组成的氮化硅 或Ca，并含有Al和Eu。

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