Patent ID: 8508119

Claim:
A phosphor comprising: an oxynitride α-SiAlON phosphor represented by a general formula of Ca p Eu q Si 12−(m+n) Al (m+n) (O, N) 16 , wherein m=(2×p+3×q), n=(2×p+3×q)/2, m and n are any numbers greater than 0 and satisfy an inequality of m+n<12, wherein a main phase of the α-SiAlON phosphor has an α-SiAlON structure; wherein 0.75≦p≦1.0 and 0.02<q<0.09, and wherein the α-SiAlON phosphor is obtained by mixing starting materials including Silicon Nitride powder, Calcium Carbonate powder, Aluminum Nitride powder, and Europium Oxide powder at a mixing ratio designed to give a design composition of Ca p Eu q Si 12−(m+n) Al (m+n) O n N 16−n ; and sintering the starting materials.