摘要:
A diamond film formation method includes forming, in a composite of a metal material and a semiconductor material, diamond nuclei on a surface of the metal material at a temperature below 650° C. in a first mixed gas containing at least carbon and hydrogen, and growing the diamond nuclei formed in the composite at a temperature below 750° C. in a second mixed gas containing at least carbon and hydrogen to form a diamond film.
摘要:
A discharge lamp encompassing a sealed-off tube filled with a discharge gas and a discharge electrode provided in the sealed-off tube. The discharge electrode embraces a supporting base and an electron-emitting layer formed of a wide bandgap semiconductor and provided on the supporting base, implemented by a plurality of protrusions, at least part of surfaces of the protrusions are unseen from a perpendicular direction to thereof above a top surface of the electron-emitting layer, dangling bonds of the wide bandgap semiconductor at the surfaces are terminated with hydrogen atoms.
摘要:
A thermal-electron source includes a substrate; and a thermionic cathode having conductivity, and being provided on the substrate, and including a plurality of microscopic pores on a surface of the thermionic cathode.
摘要:
A discharge electrode emitting electrons into a discharge gas, encompasses an emitter and current supply terminals configured to supply electric current to the emitter. The emitter embraces a wide bandgap semiconductor having at 300 K a bandgap of 2.2 eV or wider. Acceptor impurity atoms and donor impurity atoms being doped in the wide bandgap semiconductor, the activation energy of the donor impurity atoms being larger than the activation energy of the acceptor impurity atoms.
摘要:
A semiconductor light-emitting device includes: a first semiconductor layer; a light-emitting layer being disposed on the first semiconductor layer; a second semiconductor layer being disposed on the light-emitting layer, and metal electrodes connected to the first semiconductor layer and the second semiconductor layer. The light-emitting layer is lower in refractive index than the first semiconductor layer. The second semiconductor layer is lower in refractive index than the light-emitting layer. The metal electrodes supply a current to the light-emitting layer.
摘要:
A discharge light emitting device includes a container formed from insulating diamond and accommodating a discharge space therein, a material for discharge sealed in the discharge vessel, and an electrode pair formed from a conductive diamond and provided to apply voltage to the material for discharge.
摘要:
A discharge lamp, in which diamond high in secondary electron emission efficiency and low in sputtering ratio is used as a cold cathode, includes an outer envelope filled with a discharge gas, a fluorescent film provided on an inner surface of the outer envelope, and a pair of electrodes which cause discharge to occur within the outer envelope. A diamond member is provided on a surface of each electrode, and oxygen is contained in the discharge gas at a ratio not less than 0.002% and not more than 12.5%.
摘要:
A cold cathode discharge device with high efficiency of light emission and long life is prepared by a cold cathode having both high secondary electron emission and anti-spattering property. Using carbon system cold cathodes constituted of a mixed phase of diamond and graphite, a cold cathode discharge device with high efficiency of light emission and long life is realized. It is desirable that an element having a wavelength of light emission equal to or shorter than 200 nanometers should be mixed in the discharge gas.
摘要:
A field emission device comprises an anode plate, an emitter plate having a plurality of filed emission portions that face the anode plate, and a gate plate having openings corresponding to the filed emission portions. The field emission device also comprises a current limiting element composed of a J FET or a MOSFET that is integrally formed with the gate plate and that is inserted between the gate plate and a gate voltage supply terminal. The loss caused by the emitter current is small as the current limiting element is inserted into a gate input portion. If the field emission device including a number of blocks each having the above structure is constituted, a power switching device having sufficient redundancy against a short circuit between the gate and the emitter can be implemented.
摘要:
Disclosed herein are a cold-cathode power switching device and a method of manufacturing the same. The device has a high voltage resistance and can be manufactured with high yield though its element area is large to control large currents. In the method, arrays of miniature emitters are prepared, and the emitter arrays are adhered to a conductive substrate having trenches. The conductive substrate is cut along the trenches, forming a plurality of substrates. The gaps between these substrates are filled with insulating resin. As a result, a multi-module power switching device for controlling large currents is manufactured with high yield. Further, cold-cathode modules, each having a gate pad, are arranged on a cathode electrode made of a conducive substrate, insulating strips are formed on the cathode electrode, gate lines are formed on the insulating strips, and the gate pads are connected to the gate lines. The electrons emitted from the modules can be controlled at a time. Each module may have a cathode pad connected to a cathode line. Depressions are made in those part of an anode electrode which oppose the gate pads and cathode pads, providing a sufficient insulation distance between each emitter and the anode electrode. Hence, a cold-cathode power switching device of field emission type can be provided which has a high voltage resistance.