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：US20250093010A1

公开(公告)日：2025-03-20

申请号：US18887227

申请日：2024-09-17

Applicant: NICHIA CORPORATION

Inventor： Keiji OKIDA ,  Takaaki TADA ,  Kohei KUNIMOTO

IPC: F21V3/06 ,  F21V5/00 ,  F21V5/04 ,  F21Y103/10

Abstract: A light transmissive member, a light source device, a method of producing a light transmissive member, and a method of producing a light source device, which can suppress occurrence of damage, are provided. The light transmissive member includes a light transmissive base member having a first surface and a second surface positioned on a side opposite to the first surface, a light transmissive first film covering the first surface, a light transmissive second film covering the second surface, and a light transmissive third film provided over the second film. The first film contains hydrous alumina. The second film contains aluminum oxide having a crystallinity lower than that of α-alumina. Hardness of the third film is higher than hardness of the second film.

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.