In manufacturing method of the reforming fluorescent substance grain powder and the said reforming fluorescent substance grain powder and uses the said reforming fluorescent substance grain powder the EL

摘要

PROBLEM TO BE SOLVED: To provide an improved phosphor particulate powder in which water resistance is excellent and reduction of an initial emission luminance is suppressed, a method for surface treatment for obtaining the improved phosphor particulate powder and an EL element using the powder.;SOLUTION: In the improved phosphor particulate powder, a coating film composed of at least one kind selected from compounds containing silicon, aluminum, titanium or zirconium is uniformly coated on a surface of a phosphor particulate, and the initial emission luminance is 85% or more relative to that before the coating treatment.;COPYRIGHT: (C)2006,JPO&NCIPI