CARBIDE-DERIVED CARBON, ELECTRON-EMITTING SOURCE FOR COLD CATHODE, AND ELECTRON-EMITTING ELEMENT

PROBLEM TO BE SOLVED: To provide a carbide-derived carbon, an electron-emitting source for a cold cathode, and an electron-emitting element. SOLUTION: The carbide-derived carbon is a carbide-derived carbon produced by thermochemically reacting a carbide compound with a gas containing a halogen family element to extract the elements except carbon from the carbide compound. This carbon is one wherein the intensity ratio between the D band randomly derived at 1,350 cm-1and the graphite G band at 1,590 cm-1lies in the range of 0.3 to 5 when analyzed by Raman peaks, one having a BET specific surface area of 1,000 m2/g or larger, one which, when analyzed by X-ray diffraction, shows a weak peak or a broad single peak ascribable to the graphite (002) face at 2θ=25° appears, or one wherein the electron diffraction pattern is a halo pattern of amorphous carbon when analyzed by electron microscopy. Thus, it is possible to provide an electron-emitting source having excellent uniformity and a long lifetime and to produce an electron-emitting source at a low cost. COPYRIGHT: (C)2008,JPO&INPIT