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PURPOSE : A wavelength conversion material has a uniform size of phosphor powder and to improve photoluminescence brightness and photoluminescence excitation performance.CONSTITUTION : A wavelength conversion material comprises A_(3-x)Si_6O_3N_8Cl_y : B^(2+)_z where 0[Reference numerals] (AA) Light emitting wavelength; (BB) About 40% enhancementCOPYRIGHT KIPO 2013