160results about How to "Channel short" patented technology

A vertical FET structure with nanowire forming the FET channels is disclosed. The nanowires are formed over a conductive silicide layer. The nanowires are gated by a surrounding gate. Top and bottom insulator plugs function as gate spacers and reduce the gate-source and gate-drain capacitance.

The invention relates to a kind of method for manufacturing propylene by catalytic cracking alkene of no less than tetra carbon, which mainly solves the short catalyst regeneration period problem and the stability problems uninvolved in previous technique. The invention uses minor crystalline grain and molecular sieve with high silicon-aluminium ratio as the catalyst for catalytic cracking with alkene that no less than tetra carbon to manufacture propylene. According to the technique scheme that described above, the invention can solve the problems mentioned above excellently, and can be used in industrial production of manufacturing propylene by catalytic cracking with alkene.

We describe a RESURF semiconductor device having an n-drift region with a p-top layer and in which a MOS (Metal Oxide Semiconductor) channel of the device is formed within the p-top layer.

The present invention relates to an aromatization catalyst and production process of clean gasoline. Said invention adopts hydrofining and aromizing two-stage catalyst combined process to make the FCC gasoline with high sulfur content and high olefin content into clean gasoline. Said invented aromatization catalyst adopts small-grain molecular sieve catalyst, and makes the aromatization catalyst undergo the process of hydrothermal treatment and can make the strong acid quantity of said catalyst be reduced. Said invention can raise yield of gasoline, and can obtain high-quality clean gasoline product.

The invention discloses an air positive electrode constructed by conductive gel particles and a lithium air battery. The air positive electrode is characterized by being of a full-solid structure and comprising particles with arbitrary shapes, wherein the particles are prepared from conductive gel, gaps are formed among the particles, electrons and ions can be simultaneously conducted by conductive gel, and the size range of the particle sizes of the particles is 10-500 microns; the particles are stacked to form a laminated structure, and the thickness of the laminated structure is 50 microns to 5 millimeters. A battery cell of the lithium air battery is of a multi-layer winding type structure or a multi-layer laminating type structure and is formed by winding and laminating a plurality of repetitive units, and each repetitive unit comprises the air positive electrode. A rapid gas dispersion channel is formed in the air positive electrode and can be prepared to be relatively thick, so that the problem that oxygen is difficult to diffuse is effectively solved, and the air positive electrode can be truly input into actual application.

A process for manufacturing a semiconductor device of the trench variety with reduced feature sizes and improved characteristics which process includes forming a termination structure having a field oxide disposed in a recess below the surface of the semiconductor die in which the active elements of the device are formed, and forming source regions after the major thermal steps have been performed.

The present invention discloses a hydrogenation method for producing lubricating oil base oil through poor-quality heavy distillate oil. According to the method, poor-quality heavy distillate oil and hydrogen gas enter a first-stage reaction zone to carry out a hydrorefining reaction, the reaction effluent is separated, the obtained liquid enters a second-stage reaction zone to carry out a hydrorefining reaction, the second-stage reaction effluent enters a third-stage reaction zone to carry out a hydrocracking reaction, the hydrocracking effluent is separated, and at least part of the tail oil and new hydrogen are mixed and then are subjected to an isomerizing dewaxing and finishing reaction to obtain various lubricating oil base oils. With the method of the present invention, the nitrogen-containing impurities in the poor-quality raw material can be subjected to hydrotreating under the relatively mild condition so as to make the poor-quality raw material meet the hydrocracking feeding requirement, such that the lubricating oil base oil raw material source is broadened; and the hydrorefining temperature is substantially reduced so as to increase the operation period of the device and process the poor-quality raw material, or increase the processing capacity of the device in the same operation period.

The invention discloses a ton bag unloading mechanism. The ton bag unloading mechanism comprises a carrying device and an unloading device, wherein the carrying device is used for bearing ton bags and putting the ton bags above the unloading device; the unloading device comprises a vertically arranged unloading cylinder; the unloading cylinder comprises an outer cylinder and an inner cylinder arranged on the inner side of the outer cylinder in a clearance way; the upper end of the unloading cylinder is provided with a feeding hole of the unloading device; the lower end of the unloading cylinder is provided with a discharge hole of the unloading device; the feeding hole is right opposite to a bag opening of each ton bag. According to the ton bag unloading mechanism, the unloading cylinder is of a double-layer structure with the outer cylinder and the inner cylinder, inner bag openings are positioned in the inner cylinder, outer bag openings are positioned between the inner cylinder and the outer cylinder, and channels for materials in the ton bags with the outside are reduced, so that dust diffusion is reduced and the working environment is effectively improved; meanwhile, dust is settled and recycled, so that the material loss is reduced.

The invention discloses a catalyst for straight-run naphtha aromatization and a preparation method thereof. The catalyst for straight-run naphtha aromatization is prepared by modifying a nano ZSM-5 molecular sieve, preparing a carrier and preparing the catalyst. The catalyst is suitable for treating raw materials with high alkane content. And the catalyst has high catalytic activity and high arene selectivity. So the catalyst can be applied to more mild process conditions and can be applied to production of high-octane gasoline blending components and chemical raw materials like benzene, toluene, xylene, etc.

The invention provides a multi-layer porous polyimide film and a preparation method of the porous polyimide film. The film comprises a large-hole layer and a small-hole layer or is formed in the way that one small-hole layer is sandwiched between two large-hole layers, wherein the large-hole layer is 0.15-6 microns in hole diameter and 5-100 microns in thickness, and the small-hole layer is 0.01-0.15 microns in hole diameter and 1-5 microns in thickness. The preparation method of the film comprises the following steps of: synthesizing two or three kinds of composite polyamide resin solution, by using dianhydride, diamine and two or three kinds of pore-forming materials with different granularities; carrying out composite salivating to form a two/three-layer film, carrying out two-way stretch and imidization, pickling the film for removing the pore-forming materials, thus obtaining the multi-layer porous polyimide film. The molar ratio of dianhydride to diamine is 1:1, and the mass of the pore-forming materials is 0.25-2 times that of dianhydride and diamine. Various media can conveniently pass through the large-hole layer of the film and the strength of the film is ensured; the small-hole layer can be thinned to 1 micron and the transmittance is good. According to the method, the porosity and hole diameter of all layers in the film can be easily controlled, and the method is suitable for preparing porous film products.

A method for fabrication a memory having a memory area and a periphery area is provided. The method includes forming a gate insulating layer over a substrate in the periphery area. Thereafter, a first conductive layer is formed in the memory area, followed by forming a buried diffusion region in the substrate adjacent to the sides of the first conductive layer. An inter-gate dielectric layer is then formed over the first conductive layer followed by forming a second conductive layer over the inter-gate dielectric layer. A transistor gate is subsequently formed over the gate insulating layer in the periphery area.

The invention discloses a titanium carbide/carbon core-shell nanowire array load nitrogen-doped lithium titanate composite material, a preparation method and application thereof. The method comprisesthe following steps: using an atomic layer deposition technology to grow aluminum oxide on a titanium mesh; using a chemical vapor deposition technology to grow a titanium carbide/carbon core-shell nanowire core-shell array (TiC/C) on the titanium mesh; then putting the titanium carbide/carbon core-shell nanowire array composite material in a solution to carry out a hydrothermal reaction, and thencarrying out washing, drying and calcinations to obtain LTO@TiC/C; and finally using an ammonia gas nitrating technology to nitrate the LTO@TiC/C composite array to obtain N-LTO@TiC/C. The constructed composite material, as a negative electrode material for lithium ion batteries, has excellent high rate capability and super long cycle life.

The invention discloses a rubber tree wind-preventing wind-resisting planting method and relates to the technical field of planting. The rubber tree wind-preventing wind-resisting planting method comprises the steps that (A), rubber trees are planted, wherein the good-quality rubber tree varieties which are resistant to wind and high in yield are selected to be planted at the plant line spacing of 3 m*7 m; (B), interplanting tree varieties are selected and planted, wherein good-quality wind-resisting tree varieties such as michelia macclurei, mytilaria laosensis, tea-oil trees and mahoganies are inteplanted between the lines of the rubber trees, the row spacing is 3 m, the interplanting trees are crossed to be shaped like a Chinese character 'pin', and the interplanting trees and the rubber trees are planted in a triangular shape; (C), woodland work management measures are adopted, wherein the management of the rubber trees are executed by reference to rubber tree cultivation technical regulations, the local environmental climate and rubber garden production and management relevant regulations; wind-preventing wind-resisting tree interplanting meets the general requirements of pruning and shaping, rouging and after-replacement, additional fertilizer application and the like. According to the rubber tree wind-preventing wind-resisting planting method, the whole wind-resisting ability of the rubber garden can be effectively improved, more effective tapping rubber trees are reserved, the ecological benefits of the rubber garden are improved, and the whole production benefits of the rubber are improved.

This invention relates to a vertical N channel MOS high-power field-effect transistor structure applying etching channel method on N silicon epitaxial chip to make grating oxygen layer of the fieldistor and W grating electrode in the channel of the silicon epitaxial film, W grating and silicon chip are vertical on the surface, when the fieldistor in working condition, the current flows from the drain of the silicon chip bottom through an inversion channel zone to get to the source vertical to silicon chip surface.

The invention discloses a high-nitrogen-content and high-helium-content natural gas liquefaction and crude helium and nitrogen extraction system and belongs to the technical field of extraction systems. The high-nitrogen-content and high-helium-content natural gas liquefaction and crude helium and nitrogen extraction system comprises a crude helium condenser. The crude helium condenser respectively communicates with a second liquid nitrogen throttle valve, a liquid nitrogen subcooler, a crude helium separator and a demethanizer condensation separator. The crude helium separator respectively communicates with a liquid nitrogen subcooler and a first liquid nitrogen throttle valve, the other end of the first liquid nitrogen throttle valve communicates with a flash steam separator, the flash steam separator communicates with the liquid nitrogen subcooler, and the liquid nitrogen subcooler communicates with a liquid nitrogen evaporation pressure control valve. The other end of the liquid nitrogen evaporation pressure control valve communicates with a demethanizer condenser. Natural gas is little diffused, the helium extraction efficiency is high, meanwhile, nitrogen in the natural gas is extracted to produce liquid nitrogen and nitrogen products, and the economic benefits are good.

An efficient down-hole hammer comprises a back joint, a check valve, an air distribution rod, a piston, a cylinder, a clamping ring, a drill head and a front joint. The check valve is a one-way valve and comprises a valve seat, a spring and a steel washer. The slotted piston is provide with a hole, a positioning sleeve is arranged at the back end of a valve end cover, and the air distribution rod, a positive vibration-proof rubber ring and a negative vibration-proof rubber ring are clamped in the positioning sleeve together. The efficient down-hole hammer is not provided with an inner cylinder structure, the air distribution mode is greatly innovated, a vibration-proof fine tuning device arranged between the back joint and the air distribution rod can effectively absorb counterforce of piston motion, the air distribution rod can be subjected to automatic fine tuning so as to keep the assembling verticality, the adaptive drill head is not provided with a tail pipe, and therefore high pressure air leakage is reduced, work efficiency is improved and production cost is reduced. In addition, the piston has a reliable service life.

The invention discloses a method for preparing a porous carbon material from allyl wastes and application. The preparation method comprises the following steps: S1, heating and carbonizing the allyl wastes in an inert atmosphere, wherein the carbonizing temperature is 400-800 DEG C, and the carbonizing time is 80-150 min; S2, carrying out acid pickling on the product prepared in step S1, and washing the product until the product is neutral; S3, dipping the product prepared in step S2 in a chemical activating agent; and S4, heating and activating the product prepared in step S3, wherein the heating temperature is 700-900 DEG C, and the time is 60-140 min; and carrying out acid pickling, washing and drying to obtain an allyl waste porous carbon electrode material. The method is high in professional applicability, a design process is simple, and industrialization is easy to realize. While the porous carbon material is prepared, the allyl wastes are utilized at high quality, and an obtained porous carbon super-capacitor is excellent in performance.

The invention discloses a method for synthesizing bisphenol-F with the catalysis of phosphotungstic acid modified short channel HPW-Zr/SBA-15 catalyst. According to the method, the bisphenol-F is catalytically synthesized by taking the phosphotungstic acid modified short channel HPW-Zr/SBA-15 as a catalyst and taking phenol and formaldehyde as raw materials. The adopted catalyst is synthesized through a one step method by taking polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) as a template, taking tetraethylortho silicate as a silicon source, taking phosphotungstic acid as a catalyst active component, and taking zirconium oxychloride as a modifying agent, and is simple in preparation process, short in channel, favourable to improve the mass transfer and reaction efficiency, high in reaction activity, short in reaction time, high in catalytic efficiency, easy to separate, reusable, green and environment-friendly; any organic solvent is not required to be added in the reaction process.

Disclosed are a method for preparing an MFI catalyst carrying transition elements and MFI catalyst application. Cationic gemini surfactant- dibromide-1-(dimethyl hexyl ammonium)-6-(dimethyl octodecyl ammonium) hexane is used as structure directing agent of the MFI catalyst, sodium silicate is used as a silicon source and is subjected to low-temperature hot crystallization under self-generated pressure in a rotationally dynamic manner, and after directional polycondensation, rearrangement, nucleation and growth of inorganic atom Si-Al-Na-O on a two-dimensional plane, and single-structure-cell nano-layer MFI catalytic materials which are in mesoporous and microporous structure with the thickness ranging from 2 nanometers to 5 nanometers only are synthetized. Activity center point number of the MFI catalyst is increased evidently by utilizing two-dimensional single-structure-cell nano MFI carrying transition elements of Fe and Mo, the thickness of the catalyst crystal is reduced effectively, diffusion path is shortened, and molecular diffusion is speeded up. In addition, according to the result of a test of utilizing the selective catalytic reduction (SCR) process to remove tail gas of automobiles, NOx removal rate reaches 99.5%.

The present invention discloses a process method for producing lubricating oil base oil through a poor-quality raw material. According to the process method of the present invention, a poor-quality raw material firstly enters a first-stage reaction zone to carry out a hydrorefining reaction, a co-current flow process and a counter flow process are concurrently adopted in the first stage, the generated oil obtained in the first stage enters a second-stage reaction zone to carry out a deep hydrogenation reaction, and the second-stage reaction effluent is subjected to hydrocracking; and the cracking tail oils are subjected to cutting pre-fractionation to obtain the suitable tail oil distillate, and the suitable tail oil distillate is subjected to an isomerizing dewaxing and finishing reaction to obtain the lubricating oil base oil distillate. With the method of the present invention, the nitrogen-containing impurities in the poor-quality raw material can be subjected to hydrotreating under the relatively mild condition so as to make the poor-quality raw material meet the hydrocracking feeding requirement, such that the lubricating oil base oil raw material source is broadened; and the operation period of the device can be increased and the poor-quality raw material can be processed, or the processing capacity of the device can be increased in the same operation period.