Abstract:
An electrically conducting n-type ultrananocrystalline diamond (UNCD) having no less than 10 atoms/cm of nitrogen is disclosed. A method of making the n-doped UNCD. A method for predictably controlling the conductivity is also disclosed.
Abstract translation:公开了具有不小于10 19原子/ cm 3的氮的导电n型超微晶金刚石(UNCD)。 制造n掺杂UNCD的方法。 还公开了可预测地控制电导率的方法。
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.
Abstract:
A cathode structure comprising a getter material provided with a diamond film. The getter material may include zirconium, vanadium and iron. Cathode structures may have a substantially rounded configuration including a substantially straight portion. Other cathode structures may have a substantially flat portion, with the diamond film covering essentially the entire flat surface. Methods of manufacturing cathode structures may include conditioning the cathode structure by applying a voltage.
Abstract:
Diamond microtip field emitters (25) are fabricated for use in diode and triode vacuum microelectronic devices, sensors and displays. Ultra-sharp emitter tips are formed in a fabrication process in which diamond is deposited into mold cavities in a two step deposition sequence. During deposition of the diamond, the graphite content is carefully controlled to enhance emission performance. The tips or the emitters (25) may be treated by post fabrication processes, such as sharpening or doping with gold.
Abstract:
A matrix addressable flat panel display includes a flat cathode (31) operable for emitting electrons to an anode (15) when an electric field is produced across the surface of the flat cathode by two electrodes (34) placed on each side of the flat cathode. The flat cathode (31) may consist of a cermet or amorphic diamond or some other combination of a conducting material and an insulating material such as a low effective work function material. The electric field produced causes electrons to hop on the surface of the cathode (31) at the conducting-insulating interfaces. An electric field produced between the anode (15) and the cathode (31) causes these electrons to bombard a phosphor layer (16) on the anode (15).
Abstract:
Doped and undoped polycrystalline and noncrystalline diamond films produced by plasma enhanced chemical transport emit electrons into a vacuum in response to an applied electrical field. The field required to create emission is less than 20 V/ mu m for doped polycrystalline films, can be in the range of 5 to 8 volts/ mu m for undoped nanocrystalline films and may be 3 volts/ mu m or less for doped nanocrystalline films. These materials exhibit emission properties which are continuous across the whole surface of the film.
Abstract:
A field emitter structure, comprising: a base substrate (42); a field emitter element (48) on the base substrate; a multilayer differentially etched dielectric stack (58, 60) circumscribingly surrounding the field emitter element on the base substrate; and a gate electrode (66) overlying the multilayer differentially etched dielectric stack, and in circumscribing spaced relationship to the field emitter element. Also disclosed are electron source devices, comprising an electron emitter element including a material selected from the group consisting of leaky dielectric materials, and leaky insulator materials, as well as electron source devices, comprising an electron emitter element including an insulator material doped with a tunneling electron emission enhancingly effective amount of a dopant species, and thin film triode devices.
Abstract:
A cold-cathode electron source element of the present invention has a cold cathode (10) on a substrate (1), and the cold cathode (10) comprises a cold cathode base material (4) and particles (8) of conductive material dispersed in the cold cathode base material (4), the particles having a diameter which is sufficiently smaller than the thickness of the cold cathode (10) and a work function which is lower than that of the cold cathode base material (4). The cold-cathode electron element of the present invention can be driven at a low voltage and provide a high emission current in a stable fashion and superior processibility of cold cathodes, whereby it is possible to enlarge the area of an element.
Abstract:
A method of making sub-micron low work function field emission tips (32, 66) without using photolithography. The method includes physical vapor deposition of randomly located discrete nuclei to form a discontinuous etch mask (20, 50). In one embodiment an etch is applied to low work function material (14) covered by randomly located nuclei to form emission tips (32) in the low work function material (14). In another embodiment an etch is applied to base material (44) covered by randomly located nuclei to form tips (58) in the base material (44) which are then coated with low work function material (60) to form emission tips (66). Diamond is the preferred low work function material (14, 60).