| abstract |
A rare-earth oxide-based phosphor capable of forming a phosphor film with improved resolution even when excited by an electron beam having a high current density, and a method for manufacturing the same. Kind Code: A1 A rare earth oxide phosphor having a spherical particle shape, a median particle diameter of 3 to 9 μm, and a quartile deviation (QD) of the particle size weight distribution of 0.25 or less. For this purpose, the fired material particles of the phosphor raw material are reheated and melted in a floating state, quenched to make the particles spherical, dispersed and classified. [Selection diagram] Fig. 1 |