(Oxy)nitride phosphor powder and method of producing same

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United States of America Patent

PATENT NO 9828545
SERIAL NO

14781132

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Abstract

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An (oxy)nitride phosphor powder has a fluorescence peak wavelength of 610 to 625 nm and also has higher external quantum efficiency than the conventional one. The (oxy)nitride phosphor powder includes an α-type SiAlON and aluminum nitride, represented by the compositional formula: Cax1Eux2Si12−(y+z)Al(y+z)OzN16−z wherein x1, x2, y, z fulfill the following formulae: 1.60≦x1+x2≦2.90, 0.18≦x2/x1≦0.70, 4.0≦y≦6.5, 0.0≦z≦1.0. The powder can additionally contain Li in an amount of 50 to 10000 ppm. The content of the aluminum nitride may be more than 0 mass % to less than 33 mass %.

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Patent OwnerAddress
UBE CORPORATION1978-96 OAZA KOGUSHI UBE-SHI YAMAGUCHI 755 -8633

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujinaga, Masataka Ube, JP 17 201
Iwashita, Kazuki Ube, JP 12 154
Jida, Shinsuke Ube, JP 17 118
Sakai, Takuma Ube, JP 40 181
Sumino, Mao Ube, JP 6 12

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