Patent ID: 9512359
Filing Date: 2016-12-06
CPC Classification: C09K,H01L,Y10T

Claim Text:
1. A phosphor comprising a europium-activated sialon crystal having a basic composition represented by the following formula: wherein x is 0<x<1, α is 3, and β, γ, δ and ω satisfy 9<β≦15, 1≦γ≦5, 0.5≦δ≦3 and 10≦ω≦30, wherein the phosphor belongs to an orthorhombic system, has an emission peak wavelength of 500 nm or more and 540 nm or less, is composed of particles having a Wadell's sphericity of from 0.65 to 0.71, and emits green light by being excited by ultraviolet light, violet light or blue light, and wherein the phosphor has an average particle size of from 8 to 40 μm.