198 results about "Secondary electron emission coefficient" patented technology

A spacer (140) suitable for use in a flat panel display is formed with ceramic, transition metal, and oxygen. At least part of the oxygen is bonded to the transition metal or / and constituents of the ceramic to form a uniform electrically resistive material having a resistivity of 105-1010 ohm-cm and a secondary electron emission coefficient of less than 2 at 2 kilovolts.

The invention discloses a panel type collection device and method for measuring a secondary electron emission coefficient. A measuring device mainly comprises a rotary platform, a sample table, a heating device, a Faraday cylinder, a current amplifier and a collection electrode, wherein the inner wall of the Faraday cylinder is plated with a layer of carbon, the Faraday cylinder is connected with a bias voltage device and the current amplifier and is used for measuring a primary incidence current; the collection electrode is in a panel structure, the upper surface of the collection electrode is coated with a layer of fluorescent powder so as to conveniently adjust and focus electron beam faculae, and the lower surface of the collection electrode is plated with a layer of carbon so as to inhibit electron multiplication phenomenon in a collection process; the collection electrode is connected with a bias voltage device and the current amplifier and is used for measuring secondary electron stream emitted by the surface of a material. By utilizing a rotary device, multiple samples can be simultaneously measured, so that the measuring time is saved; by utilizing the heating device and a temperature control device, the temperature of a sample can be accurately controlled in a range of 30-300 DEG C, and the heating device and a temperature control device are used for researching the influence of the temperature on the secondary electron emission coefficient; by providing the novel electron collection device for measuring the secondary electron emission coefficient, the measurement of the secondary electron emission coefficients under different temperatures is realized.

The invention relates to the technical field of power transmission and distribution equipment, in particular to a device and method for inhibition of charge injection under a transient electric field.When a high-voltage electric appliance operates in a transient overvoltage waveform, a local high-voltage electric field enables charge injection into an insulating medium and enables continuous physical processes of charge injection and extraction and the like under the action of external stress, and consequently local electric field distortion is aggravated, and internal breakdown and surface flashover faults can be probably caused. The method for inhibition of charge injection under the transient electric field includes steps: selecting a magnesium oxide target material, and adopting a magnetron sputtering instrument to form a magnesium oxide film on the surface of a substrate; performing insulating coverage on a high-voltage equipment current-carrying module by the aid of the substrate. The electron work function of a metal insulating interface can be increased, the surface secondary electron emission coefficient is increased, and insulating surface flashover starting voltage under a high vacuum condition is raised.

Embodiments described herein relate to apparatus and methods for performing electron beam reactive plasma etching (EBRPE). In one embodiment, an apparatus for performing EBRPE processes includes an electrode formed from a material having a high secondary electron emission coefficient. In another embodiment, methods for etching a substrate include generating a plasma and bombarding an electrode with ions from the plasma to cause the electrode to emit electrons. The electrons are accelerated toward a substrate to induce etching of the substrate.

The solid material secondary electron emission coefficient testing device with intelligent measurement and control technology of the present invention includes a mechanical system, an electrical control system and an analysis and detection system; the mechanical system includes a vacuum chamber, a vacuum pump, an electron gun, an electron collection device and a heating device, and Provide a vacuum environment, generate and collect secondary electrons; the electrical control system includes a power supply, a programmable controller and a temperature control circuit, and the programmable controller controls the power supply voltage through a digital and analog conversion module; the analysis and detection system includes an industrial computer , digital-to-analog conversion module, two-way oscilloscope card and touch control screen, and KingView is installed on the industrial computer to store, analyze and process the detected electronic signals, and display the secondary electron emission coefficient of the measured solid material The relation curve between electron energy and electron gun exiting electron energy. The invention can better meet the needs of industrial antistatic design, engineering material selection and static electricity prediction for measuring the secondary electron emission coefficient of solid materials.

This invention discloses novel nanocomposite material structures which are strong, highly conductive, and fatigue-resistant. It also discloses novel fabrication techniques to obtain such structures. The new nanocomposite materials comprise a high-conductivity base metal, such as copper, incorporating high-conductivity dispersoid particles that simultaneously minimize field enhancements, maintain good thermal conductivity, and enhance mechanical strength. The use of metal nanoparticles with electrical conductivity comparable to that of the base automatically removes the regions of higher RF field and enhanced current density. Additionally, conductive nanoparticles will reduce the surface's sensitivity to arc or sputtering damage. If the surface is sputtered away to uncover the nanoparticles, their properties will not be dramatically different from the base surface. Most importantly, the secondary electron emission coefficients of all materials in the nanocomposite are small and close to unity, whereas the previously used insulating particles can produce significant and undesirable electron multiplication.

The invention discloses a double-layer electrode for a multi-level depressed collector and a preparation method thereof, and relates to vacuum device technology. The double-layer electrode comprises a metal layer and a graphite layer; opposite surfaces of the two layers are fixedly connected tightly; and the material of the graphite layer is pyrolytic graphite or high-density isotropic graphite. The electrode can ensure air-tight seal with ceramics and other metals by utilizing the outer-layer electrode; and the inner-layer pyrolytic graphite or high-density isotropic graphite has low secondary electron yield so as to facilitate improving the efficiency of the multi-level depressed collector. The preparation process adopts coating and sintering technology, and is simple and firm.

The invention relates to a method for inhibiting secondary electron emission of a microwave component surface by adopting a nanostructure plating layer. According to the method, a microwave component is subjected to necessary washing, and then is coated with a protection glue to protect the surface requiring no treatment; phosphoric acid is adopted to carry out an electrochemical etching treatment, such that a porous alumina film layer with a hole size of about 100 nm and a depth-to-width ratio more than 10 is formed on the surface of an aluminum alloy; repeated washing is performed to remove the protection glue; a layer of a silver layer with a thickness of about 50 nm is plated on the oxidation film through evaporation plating; and finally a vacuum heating treatment is performed. With the treatment of the method of the present invention, binding force of the plating layer and the substrate can be improved, and the characteristic of the significantly-reduced melting point of the nano-silver is adopted, such that the nano-silver is self-assembled on the surface of the oxidation layer to form a nano-trap structure while the continuity of the silver plating layer can be maintained well; and inhibition of secondary electron emission is achieved based on assurance of a certain electrical conductivity. The method of the present invention provides good cohesion for the existing microwave component treatment process, and the secondary electron emission coefficient of the microwave component surface is significantly inhibited.

Provided is a gas discharge display panel that exhibits a favorable display performance by maintaining a wall charge retaining power, controlling discharge delay within a range adequate for optimal image display, and reducing the discharge starting voltage at comparatively low cost. Also provided is a PDP that exhibits more reliability with enhanced display quality by further improving the secondary electron emission factor γ compared to conventional cases and lowering the discharge starting voltage to widen the driving margin. Further provided is a manufacturing method of a gas discharge display panel, by which the manufacturing cost lowers by reduction of the exhaustion time in the sealing exhaustion process, and by which the driving circuit cost is reduced. In a gas discharge display panel of the present invention, a protective layer (15) has a first protective film (151) and a second protective film (152), the second protective film (152) is formed on at least part of a surface of the first protective film (151), and the first protective film (151) has a larger impurity content than the second protective film (152).