Patent ID: 7476337

Claim:
A manufacturing method of a phosphor, with the product phase expressed by a composition formula MABOoNn:Z, where element M is at least one kind of element having bivalent valency, element A is at least one kind of element having tervalent valency, element B is at least one kind of element selected from the elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is at least one kind of element selected from rare earth elements or transitional metal elements, satisfying n=3−2/3o, o+n>8/3, said manufacturing method comprising: obtaining a mixture by weighing and mixing raw material powders of this phosphor under an inert atmosphere; maintaining and firing the mixture for 0.5 hours or more at 1000° C. or more to obtain a fired product; and pulverizing the obtained fired product to obtain a phosphor having a prescribed average particle size, wherein in the step of obtaining the fired product by firing the mixture, any one of nitrogen, ammonia, mixed gas of ammonia and nitrogen, or mixed gas of nitrogen and hydrogen is used as the atmosphere gas during firing, and firing is performed while 0.01 L/min or more of the atmosphere gas in the firing furnace is ventilated.