Patent ID: 11891556
Assignee: NICHIA CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 3:
4. A method for manufacturing a nitride phosphor having a composition containing Eu, Si, Al, N and a group 2 element comprising at least one selected from the group consisting of Mg, Ca, Sr, and Ba,
the composition having a ratio of a total molar content of the group 2 element and Eu to a molar content of Al of 0.8 or more and 1.1 or less, a molar ratio of Eu of 0.002 or more and 0.08 or less, a molar ratio of Si of 0.8 or more and 1.2 or less, and a total molar ratio of Si and Al of 1.8 or more and 2.2 or less, the method comprising:
performing a heat treatment of a raw material mixture containing a group 2 element source, an Eu source, a Si source, an Al source, and a metal fluoride in a closed container made of tungsten at a temperature of 1800° C. or higher and 2100° C. or lower to obtain a heat-treated product.