Abstract:
A stable cold field electron emitter is produced by forming a coating on an emitter base material. The coating protects the emitter from the adsorption of residual gases and from the impact of ions, so that the cold field emitter exhibits short term and long term stability at relatively high pressures and reasonable angular electron emission.
Abstract:
PROBLEM TO BE SOLVED: To provide an aqueous composition for electron emission source formation, and an electron emission source using the same. SOLUTION: The aqueous composition for electron emission source formation contains a carbon system compound, a silicic compound and water. By this, a desired pattern is formed vividly by the aqueous composition for electron emission source formation. Since the electron emission source manufactured of the composition hardly has residual carbon, emission performance and a life are improved. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
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 -1 and the graphite G band at 1,590 cm -1 lies in the range of 0.3 to 5 when analyzed by Raman peaks, one having a BET specific surface area of 1,000 m 2 /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
Abstract:
PROBLEM TO BE SOLVED: To provide an activation method which increases the number of emission sites relative to a conventional activation method, in a manufacturing method of an electron emission element formed of fibrous carbon such as a carbon nanotube. SOLUTION: A cathode board 1 and an anode board 2 are arranged by facing each other in a depressurized atmosphere with an activation gas introduced therein, and a reverse bias voltage is applied to the cathode conductor 12 and an anode conductor 22. That is to say, a positive voltage is applied to the cathode conductor 12, and a negative voltage is applied to the anode conductor 22. A surface of a carbon layer 13 formed by applying and drying paste containing fibrous carbon and carbon impurities is roughened (destroyed), and carbon fibers 141 and 142 are exposed. Then, the length of the long carbon fiber 141 of the cathode board 1 in Fig. 1(c) is adjusted to a value equivalent to that of the carbon fiber 142 by removing a tip thereof by an equalization method. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electron source which is a thin film type electron source having a lower electrode and an upper electrode and an electron acceleration layer comprising an insulator or a semiconductor between them starting a diode current at lower threshold voltage than in the prior art and capable of securing a diode current required for electron emission even at low voltage, and to realize an image display device having a long service life and low power. SOLUTION: It is realized by using noble metal of a platinum group (8 group) or an Ib group containing alkali metal oxide, alkaline earth metal compound and a transition-metal compound of 3 to 7 group from an interface with the electron acceleration layer to the surface or their laminated film, mixed film or alloy film as the upper electrode. COPYRIGHT: (C)2007,JPO&INPIT