Patent ID: 7795797

Claim:
A phosphor made of phosphor particles coated with inorganic substance lamination, the lamination comprising: an inner coating layer that is relatively thin and transparent, formed by a first film forming method and coated on said phosphor particle; and an outer coating layer that is relatively thick and transparent, made of one or more of SiO 2 , Al 2 O 3 and SiON, having a thickness of about 200 nm to about 500 nm, formed by a second film forming method different from said first film forming method and coated over an outer surface of said phosphor particle having said inner coating layer thereon, wherein said second film forming method is fluidized bed CVD, wherein said first film forming method is a nonaqueous method coating nanometer sized particles and sintering, wherein said inner coating layer includes at least one of TiO 2 , Al 2 O 3 , SiO 2 and SiON, and wherein said phosphor particles include at least one of Sr 1-x Ca x S:Eu and Sr 1-x Ga 2 S 4 :Eu.