Primary emphasis was placed on electrophoretic deposition of the low-voltage phosphor to the indium-tin oxide coated glass for the application of field emission display. The suspension was prepared with ZnS:Cu, Al green phosphor, isopropyl alcohol, Mg(NO3)(2) nitride, and glycerin. The phosphor deposited by various parameters, such as deposition time and applied voltage, was examined in detail. In addition, a comparison was made by analyzing luminance properties of the phosphor mixed with and without the conducting In2O3 powder of less than 1 mu m size. The measurement was performed as a function of In2O3 concentration from 3 to 15 wt %. The enhanced impact of the indium powder mixing on the phosphor was clearly demonstrated by the aging performance curve at 1000 V excitation voltages with a current density of 1 mA/cm(2). The optimum mixing concentration of the In2O3 powder was 10% in this investigation.