Abstract:
The inventive method for extracting electrons in a vacuum consists in the following: creation of a cathode which comprises at least one junction (9) between a metal (7) which is used as an electron reservoir and an n-type semiconductor (8), possessing a surface potential barrier which has a height which is measured in tenths of electron volts and having a thickness ranging from 1-20 nm; the electrons are injected via the metal-semiconductor junction (9) in order to create a charge which has enough space to reduce the semiconductor surface potential barrier to a value which is lower than or equal to 1 eV in relation to the Fermi level of the metal (7); the height of the n-type semiconductor surface potential barrier (Vp) is controlled with the aid of the polarization source creating an electric field in a vacuum in order to regulate emission of the electron flow to the anode.
Abstract:
Semiconductor device with a semiconductor cathode having an emissive part (pn junction) separated from a contact part which has locations at which a controlled breakdown occurs on a contact metallization at too high voltages, so that, during manufacture and operation, the emissive part in an electron tube is protected from damage.
Abstract:
A planar doped barrier region of semiconductor material is coupled to a vacuum or gaseous region to provide electron emission from the planar doped barrier region into the vacuum or gaseous region. When a voltage is applied across the planar doped barrier region electrons flow from one end of the region to another. This flow results in the emission of electrons if the work function of the emission surface is less than the handgap of the semiconductor material. The device of the present invention can be used as a vacuum microelectronic emitter, a vacuum microelectronic transistor, light source, klystron, or travelling wave tube.
Abstract:
An emitter (10) includes an electron supply layer (16), an oxide layer (15) on the electron supply layer defining an emission area and a quantum dot zeolite emission layer (14) in the emission area and in contact with the electron supply layer. The quantum dot zeolite emission layer includes a plurality of cages and holds semiconductor materials within the cages.
Abstract:
In an electron-emitting component with a cold cathode comprising a substrate and a cover layer with a diamond-containing material consisting of nano-crystalline diamond having a Raman spectrum with three lines, i.e. at K = 1334 +/- 4 cm with a half-width value of 12 +/- 6 cm , at K = 1140 +/- 20 cm and at K = 1470 +/- 20 cm , the cold cathode exhibits a low extraction field strength, a stable emission at pressures below 10 mbar, a steep current-voltage characteristic and stable emission currents in excess of 1 microampere/mm . The electron emission of the component demonstrates a long-time stability, and a constant intensity of the electron beam across its cross section.
Abstract:
A semiconductor cathode (11) in a semiconductor structure, in which the sturdiness of the cathode is increased by covering the emitting surface (4) with a layer of a semiconductor material (7) having a larger bandgap than the semiconductor material of the semiconductor cathode. Various measures for increasing the electron-emission efficiency are indicated.
Abstract:
In a flat panel display or other type of electron device, a thin-film electron emitter (51) and/or emitter array (50) is formed in a semiconductor film (10) of, for example, hydrogenated amorphous and/or microcrystalline Si, SiCx, SiNy, SiOxNy or the like. An injector electrode (14) forms a potential barrier ( PHI B) with the semiconductor film (10) at a back major surface (12) of the film (10). A front electrode (15) serves for biasing an emission area (11a) of the front major surface (11) at a sufficiently positive potential (V15) with respect to the injector electrode (14) as to inject electrons (e) over the barrier ( PHI B) in the operation of the emitter (51) while controlling the magnitude of an electron accumulation layer (Ne) in the semiconductor film (10) at the emission area (11a). Under this bias condition the semiconductor film (10) supports a depletion layer from the injector electrode (14) to the electron accumulation layer (Ne), so establishing a field in which the electrons are heated and directed towards the emission area (11a). The electron emission area is a plane surface area (11a) free of the front electrode (15), to which it may be connected directly or by a gateable connection (G, 29). Some of the electrons from the injector electrode (14) are emitted at the emission area (11a), while others heat electrons in the accumulation layer (Ne) to stimulate their emission. The front electrode (15) extracts excess electrons not emitted from the emission area (11a). The emitter (51) is well suited for fabrication with thin-film silicon-based technology.
Abstract translation:在平板显示器或其他类型的电子器件中,在例如氢化非晶和/或微晶硅的半导体膜(10)中形成薄膜电子发射体(51)和/或发射极阵列(50) ,SiC x,SiN y,SiO x N y等。 喷射器电极(14)在膜(10)的后表面(12)处形成具有半导体膜(10)的势垒(PHI B)。 前电极(15)用于将前主表面(11)的发射区域(11a)相对于注射器电极(14)以足够的正电位(V15)偏置,以将电子(e)注入屏障 (51)的操作,同时控制在发射区域(11a)处的半导体膜(10)中的电子累积层(Ne)的大小。 在该偏压条件下,半导体膜(10)支撑从喷射器电极(14)到电子蓄积层(Ne)的耗尽层,从而建立电子被加热并被引向发射区域(11a)的场。 电子发射区域是没有前电极(15)的平面表面区域(11a),它可以直接连接到该平面表面区域(G,29)。 来自喷射器电极(14)的一些电子在发射区域(11a)处发射,而另一些电子在蓄积层(Ne)中加热,以刺激它们的发射。 前电极(15)提取不从发射区域(11a)发射的多余电子。 发射极(51)非常适合用薄膜硅基技术制造。
Abstract:
Image source, for converting image data in the form of serial charges into a high-resolution imagewise light pattern, combines semiconductor charge-coupled devices for receiving the charges, associated small-scale field emission arrays for converting the charges to imagewise pattern of electron emissions, an electron multiplier for intensifying the electron emissions, and a luminescent phosphor layer susceptible to light output according to the impact of the intensified electron emission. The light output may be directed onto a photosensitive image recording medium to provide means for image recording. Second and third embodiments of the contemplated image source provide light output that forms an image to be viewed directly.