Abstract:
A cold cathode device is provided comprising a wide-bandgap (>5 eV) material exhibiting negative electron affinities, low trap densities, and high carrier mobilities, a junction between a first region (50) of the wide-bandgap material having n-type conductivity and a second region (20) of the wide-bandgap material having p-type conductivity, and a conductive contact (30) to forward bias the junction causing electrons to be emitted near the junction into an exterior region.
Abstract:
Intended is to provide an electron radiation cathode of a high brightness, low energy dispersion and a long lifetime. Also intended is to provide a diamond electron radiation cathode, which can be sufficiently stably gripped, which is sharpened at its leading end and which is improved in a field intensity. The diamond electron radiation cathode (110) is characterized in that it is divided into at least three regions, that is, a leading end region (203) for irradiating a column-shaped leading end with electrons, a trailing end region (201) confronting in the longitudinal direction and adapted to be gripped, and a radially thinned intermediate region (202), in that the trailing end region has a sectional area of 0.2 mm 2 , in that the leading region has a sharpened leading end, and in that the radially thinned intermediate region has a sectional area of 0.1 mm 2 at most.
Abstract:
A diamond field emission tip and methods of forming such diamond field emission tips, for use with cathodes that will act as a source of and emit beams of charged particles.
Abstract:
An electron emission film having a pattern of diamond in X-ray diffraction and formed of a plurality of diamond fine grains having a grain diameter of 5nm to 10nm is formed on a substrate. The electron emission film can restrict the field intensity to a low level when it causes an emission current to flow, and has a uniform electron emission characteristic.
Abstract:
An electron emission film having a pattern of diamond in X-ray diffraction and formed of a plurality of diamond fine grains having a grain diameter of 5nm to 10nm is formed on a substrate. The electron emission film can restrict the field intensity to a low level when it causes an emission current to flow, and has a uniform electron emission characteristic.
Abstract:
An electrode having a surface of an electrically conducting ultrananocrystalline diamond having not less than 10 atoms/cm nitrogen with an electrical conductivity at ambient temperature of not less than about 0.1 ( OMEGA cm) is disclosed as is a method of remediating toxic materials with the electrode. An electron emission device incorporating an electrically conducting ultrananocrystalline diamond having not less that 10 atoms/cm nitrogen with an electrical conductivity at ambient temperature of not less than about 0.1 ( OMEGA cm) is disclosed.
Abstract translation:具有不小于10 19原子/ cm 3氮的导电超微晶金刚石的表面的电极,在环境温度下的电导率不小于约0.1(OMEGA·cm)-1, 公开了用电极补救有毒物质的方法。 包含具有不小于10 19个原子/ cm 3氮的导电超微晶金刚石的电子发射装置,其环境温度不小于约0.1(OMEGA·cm)-1的电导率为 披露。
Abstract:
Novel uses of diamondoid-containing materials in the field of microelectronics are disclosed. Embodiments include, but are not limited to, thermally conductive films in integrated circuit packaging, low-k dielectric layers in integrated circuit multilevel interconnects, thermally conductive adhesive films, thermally conductive films in thermoelectric cooling devices, passivation films for integrated circuit devices (ICs), and field emission cathodes. The diamondoids employed in the present invention may be selected from lower diamondoids, as well as the newly provided higher diamondoids, including substituted and unsubstituted diamondoids. The higher diamondoids include tetramantane, pentamantane, hexamantane, heptamantane, octamantane, nonamantane, decamantane, and undecamantane. The diamondoid-containing material may be fabricated as a diamondoid-containing polymer, a diamondoid-containing sintered ceramic, a diamondoid ceramic composite, a CVD diamondoid film, a self-assembled diamondoid film, and a diamondoid-fullerene composite.
Abstract:
The present invention is directed to a nanotube coated with diamond or diamond-like carbon, a field emitter cathode comprising same, and a field emitter comprising the cathode. It is also directed to a method of preventing the evaporation of carbon from a field emitter comprising a cathode comprised of nanotubes by coating the nanotube with diamond or diamond-like carbon. In another aspect, the present invention is directed to a method of preventing the evaporation of carbon from an electron field emitter comprising a cathode comprised of nanotubes, which method comprises coating the nanotubes with diamond or diamond-like carbon.
Abstract:
A compact electron gun includes a field emission cathode (12), a Pierce-like electrode (18), a gate layer (14), a focus lens layer (16), a focus lens (20), and a convergence cup (22).
Abstract:
The present invention relates to a field emitter of electrons comprising a substrate with a deposited layer on it. According to the invention the substrate is made of nanomaterial, i.e. a porous carbon material having skeleton structure, with an open porosity of 35-70 % and the deposited layer is a carbon film obtained from a mixture of hydrocarbon or hydrocarbons and hydrogen using a very high frequency plasma enhanced chemical vapor deposition (VHF PECVD) technique.