NOVELTY - An ultrafine particle supported carbon material is obtained by supporting an ultrafine particle on a carbon material or carbon composite material in dispersed state. The carbon material is activated carbon, carbon black, carbon fiber, carbon nanotube, graphite, graphite nano fiber, fullerene, fullerene nano whisker, fullerene nano fiber, and graphitized fullerene nano whisker and fullerene nano fiber.    USE - For electronic emitter material of flat-surface type television, electron microscope, plasma generator and X-ray generator, double-layer capacitor electrode material, nano wiring material and solid fuel battery electrode catalyst material.    ADVANTAGE - The ultrafine particle supported carbon material having high electronic conductivity, field-electron emission characteristics, electric charging-and-discharging characteristics and catalytic ability, is simply manufactured.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) manufacture of carbon material supported with ruthenium dioxide or diacid processed osmium of ultrafine particle. A gaseous ruthenium tetroxide or gaseous osmium tetroxide having normal temperature volatile property is homogeneously sprayed on carbon material or carbon composite material to obtain ultrafine particle supported carbon material; and    (2) processing apparatus of field electron-emission type display panel substrate for carrying out direct disperse-support processing of ruthenium dioxide or diacid processed osmium of ultrafine particle on the carbon material, on a panel substrate. The gaseous ruthenium tetroxide or gaseous osmium tetroxide is sprayed on carbon material, on panel substrate, or liquid obtained by dissolving ruthenium tetroxide or osmium tetroxide in organic solvent is dripped or sprayed on carbon material to obtain ultrafine particle supported carbon material.    DESCRIPTION OF DRAWING(S) - The figure shows the processing apparatus of field-electron emission type display. (Drawing includes non-English language text).