Patent ID: 7964113

Claim:
A process for production of a nitride phosphor which has a general formula L X M Y N ((2/3)x+(4/3)Y) :R (wherein L is at least one or more elements selected from the Group II Elements consisting of Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg, M is at least one or more elements selected from the Group IV Elements consisting of C, Si, Ge, Sn, Ti, Zr and Hf, and R is an activator, 0.5≦X≦3, 1.5≦Y≦8) and absorbs at least a portion of light having a first luminescence spectrum and emits light having a second luminescence spectrum which is different from the above-mentioned first luminescence spectrum, the process having a step of firing in ammonia atmosphere.