55results about How to "Improve surface utilization" patented technology

The invention discloses a boron nitride catalyst for oxidative dehydrogenation of light alkanes or alkylbenzenes, a preparation method and application thereof, and belongs to the technical field of catalyst preparation and application. The catalyst preparation process is as follows: first prepare materials containing boron nitride, including boron nitride materials and composite materials containing boron nitride; ~1000°C, the activation time is more than 30 minutes, the boron nitride catalyst is obtained; under normal pressure, 350-800°C, the obtained boron nitride catalyst is used for the dehydrogenation reaction of C2-C5 alkanes or ethylbenzene, It can produce corresponding unsaturated hydrocarbons such as C2-C5 olefins and styrene with high selectivity. The catalyst prepared by the invention has the characteristics of high olefin selectivity, no carbon deposition, long service life, etc., does not generate excessively oxidized carbon dioxide, has a simple synthesis method, is metal-free, and has no pollution, and has the prospect of industrial application.

The invention discloses an MXene / conductive polymer composite aerogel. The MXene / conductive polymer composite aerogel is of an integrated three-dimensional grid structure which is formed by insertinglaminated MXene into a conductive polymer aerogel, wherein the conductive polymer comprises one or more of polyaniline, polypyrrole and polythiophene. The invention further discloses a preparation method of the MXene / conductive polymer composite aerogel. The method is characterized in that the MXene and the conductive polymer are mixed with organic solution and then are rapidly cooled and separated under heat inducing and solvent inducing effects under the inert gas protection; then the vacuum drying is carried out to obtain the MXene / conductive polymer composite aerogel.

The invention discloses a low-temperature high-activity methanation catalyst and a preparation method thereof. The catalyst comprises metallic nickel as an active component, AL2O3 as a carrier and MgO as a structure auxiliary agent, and an appropriate amount of lanthanum oxide and manganese oxide are added as active auxiliary agents. The catalyst comprises the following main components in percentage by mass: 18-45% of NiO, 40-70% of Al2O3, 5-30% of MgO, 0.4-5% of La2O3 and 0.1-5% of MnO2. The catalyst disclosed by the invention has the advantages of large specific area, uniform nickel dispersity, good heat stability, strong oxidation resistance, low active temperature, adaptability to low hydrogen-carbon ratio and the like. The catalyst is applicable to preparation of LNG (liquefied natural gas) through methanation of industrial gases including coke oven gas, coal synthesis gas, semi coke exhaust gas and the like rich in CO, CO2 and H2, is particularly applicable to a methanation reaction in a low-temperature section, and can effectively improve the quality of synthetic natural gas. Meanwhile, the invention also provides the preparation method of the catalyst, and the preparation method is simple in process flow and can realize industrial production easily.

The invention belongs to a micro electro mechanical (MEMS) processing field and relates to a monolithic embedded integrated silicon acceleration and pressure composite sensor. The objective of the invention is to provide the monolithic embedded integrated silicon acceleration and pressure composite sensor and a typical processing method for manufacturing the sensor. The composite sensor is of an integrated structure. An accelerometer includes a mass block-elastic diaphragm structure with a force sensitive resistor; a pressure gauge includes a pressure sensitive diaphragm with a force sensitive resistor and a sealed prefabricated cavity. The method includes the following steps of: a stress concentration structure processing step which is optional; a sensitive resistor processing step; a metal lead layer processing step; and accelerometer mass block-elastic diaphragm structure processing step. According to the monolithic embedded integrated silicon acceleration and pressure composite sensor of the invention, the accelerometer and the pressure gauge are designed in the same area, and therefore, the area of a chip can be saved, and high sensitivity can be realized when size is small. The sensor fabricated through adopting the method has functions of a pressure gauge and an accelerometer.

The invention provides a composite negative pole material for a lithium-ion battery and a manufacturing method of the negative pole material, aiming at overcoming the defect in the prior art that cycle performance of the material deteriorates caused by the factor that tin oxide falls off easily after charge-discharge cycles since graphene-loaded nano-tin oxide is used as the negative pole material for the lithium-ion battery. According to the invention, tin oxide-graphene-mesoporous carbon ternary composite material is used as the negative pole material. The manufacturing method comprises the following steps of: (1), carrying out ultrasonic dispersion on graphite oxide into deionized water, and adjusting the pH to be 9-10 by ammonia water; (2) dissolving pentahydrate stannic chloride into water, and adjusting the pH to be 9-10 by the ammonia water; (3) mixing the two solutions and transferring the solutions to a hydrothermal reaction kettle for hydrothermal reaction; (4) carrying out suction filtration and washing on obtained precipitate, carrying out ultrasonic dispersion on the obtained precipitate into a solvent, adding a mesoporous carbon precursor and stirring for hydrothermal reaction; and (5) carrying out suction filtration, washing, vacuum drying, sintering and smashing on the obtained precipitate so as to obtain the tin oxide-graphene-mesoporous carbon ternary composite material.

The invention belongs to the field of novel water pollution treatment technologies, and relates to a novel photo-catalysis water treatment technology adopting an ultrasonic atomizing process to enhance water pollution treatment effect. The novel photo-catalysis water treatment technology is characterized in that photo-catalyst-containing waste water is crushed into liquid drops of which the diameters are micron-sized; under the irradiation of a light source, photo-catalyst is stimulated to generate a photo-production active matter to catalyze and oxidize pollutants in a liquid membrane, so as to generate carbon dioxide, water and other virus-free degraded by-products. Due to the auxiliary function of ultrasonic atomizing, the external diffusion resistance of the surfaces of particles can be reduced, the mass transfer efficiency can be enhanced, the surface utilization ratio of the photo-catalyst can be improved, and catalyst poisoning can be avoided; the liquid membrane on the surface of the photo-catalyst serves as a reaction medium, so as to reduce loss of light diffusion and absorption, improve light energy utilization ratio and the utilization ratio of the photo-catalyst, and solve the problems such as catalytic activity reduction caused by clustering and precipitation of the photo-catalyst.

The invention particularly relates to a composite baffling revolving bed mass transfer and reaction device. The device comprises a static disk, a fluid distributor, a fluid inlet pipe, a gas outlet pipe, an upper guide flow plate, a lower guide flow plate, a gas inlet pipe, a moving disk, a rotating shaft, a fluid outlet pipe and a shell body; the static disk and the moving disk are placed in the shell body, and several concentric ring shaped guide flow plates with different diameters are arranged on the static disk; evenly distributed circular small holes are arranged on the upper guide flow plate, and several concentric circular cone shaped lower guide flow plates are arranged on the moving disk; evenly distributed puncture holes are arranged on the lower guide flow plate; the upper guide flow plate and the lower guide flow plate are aligned in a staggering manner; the static disk is fixedly connected with a gas outlet pipe, the moving disk is fixedly connected with the rotating shaft; one end of the rotating shaft crosses through the shell body and seals with the shell body. Through changing the flow path of the gas fluid flow body, the uniform gas fluid distribution is improved by fully using the inside diameter direction of a rotor and an axial space, the gas and fluid contact time is effectively prolonged; through adding the gas disturbance degree, the gas phase mass transfer efficiency is improved.

The invention relates to a hair shaving knife head. The hair shaving knife head is characterized in that a first guide rail, a second guide rail and a fixed guide rail are arranged at the bottom of anouter knife net, so that a first knife groove, a second knife groove, a third knife groove and a fourth knife groove are formed in the bottom of the outer knife net, one end of a hair inlet groove ineach of the first knife groove and the fourth knife groove is open and communicates with the outside, inner knife heads are correspondingly placed in the first knife groove, the second knife groove,the third knife groove and the fourth knife groove and are correspondingly attached to the bottom end faces of the first knife groove, the second knife groove, the third knife groove and the fourth knife groove. The hair shaving knife head has the beneficial effects that the first guide rail, the second guide rail and the fixed guide rail are arranged at the bottom of the outer knife net, so thatthe four independent knife grooves are formed in the bottom of the outer knife net, by adopting the structure of the four knife grooves, the length of the knife head in each knife groove can be shortened, the flatness forming requirement of the single knife head is correspondingly lowered, the machining difficulty of the knife head is reduced, the production benefit of the knife head is improved,and the production cost of the knife head is reduced.

The invention discloses a preparation method for a high-specific-capacitance graphene / high-surface-activated carbon composite material, and aims to provide the preparation method for active carbon composite material with low cost, high specific capacitance and high specific surface area utilization ratio. The preparation method is realized by the technical scheme as follows: taking peeled graphite oxide slurry as a raw material, and drying the graphite oxide slurry at a temperature of minus 40 to minus 20 DEG C; then reducing the graphite oxide into graphene oxide at a temperature of 200-500 DEG C, and adding high-surface-activated carbon in the graphite oxide stage; meanwhile, adding a dispersing agent to be stirred and mixed, and performing ultrasonic dispersion to enable the graphite oxide and the high-surface-activated carbon to be uniformly mixed, coating the surface of the high-surface-activated carbon with the graphite oxide to realize in-situ compositing of the graphite oxide and active carbon; and after performing low-temperature freezing and drying, performing puffing and reducing in the air atmosphere at a lower temperature of lower than 500 DEG C to reduce the graphite oxide into graphene oxide to prepare the in-situ composited graphene oxide / high-surface-activated carbon composite material.

The invention relates to a multi-heteroatom codoped hollow porous carbon material, a preparation method and application thereof. The method includes: firstly taking a metal-organic framework as the structure template and nitrogen source, then adding two reactants containing nitrogen, phosphorus and sulfur heteroatoms for in situ polymerization reaction on the surface of the metal-organic frameworkcompound, and doping nitrogen, phosphorus and sulfur heteroatoms at the same time to obtain a compound with similar geometric profile to a pure metal-organic framework compound crystal, and conducting high-temperature calcination and hydrochloric acid aqueous solution reaction to remove metal oxide, thus obtaining the multi-heteroatom codoped hollow porous carbon material; and mixing the composite material, acetylene black and a polytetrafluoroethylene emulsion evenly, then coating graphite paper with the mixture, and performing drying to obtain a capacitance desalination electrode. The method provided by the invention has the characteristics of simple operation and easily controllable conditions, and the obtained electrode has high specific surface area, good electrical conductivity andwettability, and has potential application prospects in capacitance desalination aspect.

The invention discloses a lead-acid storage battery plate additive preparation method. The method includes: preparing graphite oxide according to an improved Hummers' method; adding SDS (sodium dodecyl sulfate) serving as a surfactant with the mass fraction being 2-10wt%, adding a certain quantity of deionized water, mixing, and ultrasonically stripping to obtain graphene oxide water solution; transferring the graphene oxide water solution into a reactor, and performing hydrothermal reaction to obtain cylindrical reduced graphene oxide hydrogel; drying according to a freeze drying method to obtain reduced graphene oxide which is a final product. By additives prepared according to the method, specific surface area and porosity of lead-acid storage battery plates can be increased, charge acceptability of batteries is improved, and cycle lives of the batteries under HRPSoC conditions can be prolonged.

The invention provides a touch panel, which comprises a display panel and a protective cover covering the former, wherein the protective cover comprises a baseplate, a sensing layer and at least one conducting wire; the baseplate comprises a touch surface back to the display panel, and an assembling surface back to the touch surface; the assembling surface comprises a sensing area and a wiring area surrounding the sensing area, and the wiring area adopts a curved surface; the sensing layer is formed in the sensing area and used for sensing the touch action exerted on the touch surface; the at least one conducting wire is arranged in the wiring area and is electrically connected with the sensing layer. Therefore, the protective cover is improved in surface utilization ratio, as the wiring area is directly arranged on the curved surface, rather than avoiding the curved surface. Besides, given the same size, the baseplate adopting the curved surface can increase the surface area, and as a result, the surface utilization ratio of the protective cover is further improved.

The invention relates to a regeneration method of a metal catalyst, and belongs to the technical field of regeneration of deactivated catalyst. The regeneration method comprises the following steps: evenly mixing a deactivated catalyst with a nitrogen-containing compound, which can be degraded into nitrogen-containing gas at a high temperature; then placing the obtained mixture into a tubular furnace, and burning the mixture at a high temperature under the protection of inert gas so as to obtain the regenerated metal catalyst. The used nitrogen-containing compound can be degraded into nitrogen-containing gas at a high temperature, the nitrogen-containing gas can interact with metal particles so as to disperse metal particles and reduce the particle size of metal particles, thus the surface utilization rate of metal is improved; the used nitrogen-containing compound is degraded into gas at a high temperature, no other impurity is introduced; furthermore, the operation is simple, the method can be easily applied to the industrial production; and the method can effectively regenerate deactivated catalyst to obtain regenerated catalyst with recovered activity.

The invention relates to a circularly polarized micro-strip antenna adopting a wave-shaped groove structure, which is used for reducing the size of the antenna, expanding application occasions, reducing the processing cost and meeting the demands of the antenna. The micro-strip antenna adopts a coaxial feed structure and comprises a dielectric substrate, a metal floor and a metal patch with a groove structure, wherein the metal patch is positioned on the upper surface of the dielectric substrate, the groove structure comprises eight wave-shaped grooves and four square connecting grooves, two wave-shaped grooves which are in mutual mirroring and in one group are selected from the eight wave-shaped grooves as the standard, the other six wave-shaped grooves can be obtained by rotating the group of wave-shaped grooves which are in the mutual mirroring around the central position of the metal patch 90 degrees, 180 degrees and 270 degrees, and the four square connecting grooves are used for connecting the two wave-shaped grooves which are adjacent but not in mirroring. The circularly polarized micro-strip antenna has the advantages of reduced size and lowered processing cost.

The invention discloses a redox flow battery electrode plate frame runner. The redox flow battery electrode plate frame runner comprises an electrode plate frame body, a lower-part electrolyte flowingsharing passage and a flowing limiting runner and also comprises at least one flowing dispersing runner and a flow sharing flowing runner, wherein the lower-part electrolyte flowing sharing passage is arranged at the electrode plate frame body in a penetrating way, the flowing limiting runner communicates with the lower-part electrolyte flowing sharing passage, the sharing flowing runner is connected with a plurality of flowing allocation runners, one end of each of the plurality of flowing allocation runners is connected with the flowing dispersing runner, and the other ends of the pluralityof flowing allocation runners communicate with an electrode cavity. In the redox flow battery electrode plate frame runner proposed by the invention, gradual dispersing flowing to the electrode cavity is employed, an electrolyte simultaneously enters the electrode cavity from the plurality of flowing allocation runners and acts with a porous electrode material, the redox flow speed is reduced, the uniformity of redox flow in the electrode material is improved, full contact of the electrolyte and the electrode material is improved, the surface utilization ratio of the electrode material is improved, the surface reaction polarization of the electrode is reduced, the internal current loss of the battery is reduced, the average power of a battery unit comprising the redox flow battery electrode plate frame runner can reach 300W or above, and the corresponding battery stack power can exceed 30kW.

The invention discloses a storage battery plate additive. The storage battery plate additive is prepared from, by weight, 20-40 parts of modified graphene, 18-27 parts of tetrabasic lead sulfate, 23-42 parts of vapor phase method nano-silica, 5-12 parts of 2,6-di-tert-4-butylated hydroxytoluene, 3-8 parts of 2-sulfydryl-benzimidazole and 10-20 parts of purified water. The storage battery plate additive can increase the specific area and the porosity of a lead-acid storage battery plate, enhance the strength of the plate, improve the conductivity of the plate, increase the surface utilization rate of active materials, effectively reduce the lead sulfate particle size, lower polarization, improve the lead sulfate-to-cathode lead conversion efficiency, and achieve the purposes of improving the charging receptivity and prolonging the service life of the storage battery.

The invention discloses a porous self-supporting PEDOT: PSS conductive film and a preparation method thereof. The preparation method comprises the following steps: mixing nanoparticles with PEDOT: PSSto prepare a self-supporting PEDOT: PSS / nanoparticle film, and finally removing the nanoparticles to obtain the porous self-supporting PEDOT: PSS conductive film. The conductive film is prepared by the method. The method is simple and feasible, the prepared porous PEDOT: PSS thin film shows relatively high conductivity and good self-supporting performance, the size and distribution of the pore diameter of the thin film can be controlled through the particle size, shape and additive amount of the nanoparticles, and the method has a wide application prospect in the field of flexible supercapacitor electrode materials.

The invention relates to the technical field of antenna designs and particularly relates to a medium waveguide crack array antenna with series feed of a metal hollow waveguide. According to the medium waveguide crack array antenna, the metal hollow waveguide is used as a crack array antenna of a feed device; compared with a traditional medium waveguide feed manner, a feed manner adopted by the invention has small loss; meanwhile, the metal hollow waveguide feed device does not adopt a traditional plane feed manner, and the feed device is independently arranged and is fixed with upper and lower layers of an antenna medium layer, so that a feed line does not occupy a surface area of the medium layer, and furthermore, the surface of the medium layer can be used for arranging antenna radiation cracks and the surface utilization rate of the medium layer is greatly improved.

The invention provides a preparation method of a nanofiber / electrogenesis bacterium film for microbial fuel cells, and belongs to the technical field of microbial fuel cells. According to the method,nanofibers are first prepared by utilizing an electrostatic spinning technology, and then, a nanofiber / electrogenesis bacteria film is prepared from the prepared nanofibers and electrogenesis bacteriain a co-suction filtration manner to serve as an anode material. The effective contact area of the electrogenesis bacteria and the electrode material is increased, the number of electrogenesis bacteria adhered onto the inner surface and the utilization rate of the inner surface are greatly improved, the transport efficiency of electrons on the interface of the electrogenesis bacteria and an electrode is obviously improved, and the output power density of cells is improved. The nanofiber / electrogenesis bacterium film has the advantages of excellent performance, simple process, easiness in large-scale production, low cost and the like, and has important application value in the field of microbial fuel cells.

The invention discloses a flexible substrate with a double-sided I-shaped composite structure. The flexible substrate comprises a substrate, grooves, connecting column bodies and island bodies, wherein the connecting column bodies are arranged on an upper surface and a lower surface of the substrate at equal intervals in a matrix form; the connecting column bodies on the lower surface of the substrate and the connecting column bodies on the upper surface of the substrate are in mirror symmetry; adjacent connecting column bodies are isolated by the grooves; the island bodies are arranged on the connecting column bodies; the transverse sizes of the island bodies are greater than or slightly greater than the transverse sizes of the connecting column bodies; adjacent island bodies are isolated by the grooves; electronic devices adhere to the island bodies; and crosslinking conductors connecting the electronic devices are hidden in the grooves. Through adoption of the flexible substrate, a strain complete isolation effect is achieved under a large deformation behavior, so that the service lives of the electronic devices are prolonged greatly. Moreover, the electronic device can be stuck to both sides at the same time, so that the surface utilization ratio of the flexible substrate is increased, thereby realizing a double-sided flexible electronic device having specific demands.

The invention discloses an ultrasonic-assisted titanium silicalite molecular sieve modification method, and relates to the technical field of molecular sieve modification, and the modification methodcomprises the following steps: S1, mixing a silicalite molecular sieve raw powder mother liquor, a template agent and mesoporous silica in proportion, and then carrying out primary heating for alcoholremoval; then adding tetra-n-butyl titanate, the template, mesoporous silica and tetra-n-butyl titanate in a molar ratio of (33-42): (5.5-14.8): 1; and S2, after heating and alcohol removal, carryingout secondary heating and alcohol removal on the mixed solution to prepare a titanium-silicon gelling reaction solution, heating and crystallizing the titanium-silicon gelling reaction solution at the temperature of 170-195 DEG C for 55-65 hours, carrying out solid-liquid separation on the obtained solid-liquid mixture to obtain a raw powder mother solution and a solid, and washing, drying and roasting the solid, carrying out superfine grinding treatment after roasting, and filtering with a 80-mesh sieve to obtain titanium silicalite molecular sieve raw powder. The method is beneficial to combination of the metal salt and the titanium silicalite molecular sieve, and the catalytic oxidation activity is further improved.

The invention relates to a vacuum switching tube for a protective circuit breaker of a generator outlet, solving the problem that the conventional vacuum switching tube has low surface utilization rate and small capacity and can not satisfy great current breaking requirement. The vacuum switching tube for a protective circuit breaker of a generator outlet comprises a guiding sleeve, ceramic insulated shells, a composite shielded sleeve, a movable end pipe core, a static end pipe core and a protective cap, wherein the ceramic insulated shell is respectively connected with the movable end pipe core and the static end pipe core by kovars; the composite shielded sleeve is connected with the ceramic insulated shells at both ends; and the contact combinations of the movable end pipe core and the static end pipe core are corresponding to each other. The vacuum switching tube for a protective circuit breaker of a generator outlet is characterized in that either contact combination is in arc-distributed electrode structure and respectively comprises a cup seat, a supporting disk, a magnetism-concentrating column, a contact body and an oxygen-free copper tray; the composite shielded sleeve comprises an arc absorption inner layer and a magnetic shielded outer layer; and the surface of a static conductive rod is provided with radiation grooves. The invention has the advantages of reasonable structure, strong current breaking and closing capabilities, small loop resistance, uniform electrode surface combustion, high surface utilization rate and strong radiation capability.

The invention discloses a carbon nanotube string carbon hollow polyhedral nanosphere material as well as a preparation method and application thereof in preparation of a sodium ion battery negative electrode. According to the carbon nanotube string carbon hollow polyhedral nanosphere material, carbon nanotubes penetrate through and are connected with a plurality of carbon hollow polyhedral nanospheres to form sugarcoated haw string-shaped structures. The preparation method comprises the following steps of: firstly, growing ZIF-8 particles on the surfaces of the carbon nanotubes to form the sugarcoated haw string-shaped structures, then treating the ZIF-8 carbon nanotubes with tannic acid to obtain a precursor, and finally performing carbonization treatment to obtain a final product. The sodium storage capacity and the structural stability of the carbon hollow nanosphere can be improved, so that the carbon nanotube string carbon hollow polyhedral nanosphere material has relatively high reversible capacity and stable cycle performance. The carbon nanotube string carbon hollow polyhedral nanosphere material has important application value as a sodium ion battery negative electrode material.

The embodiment of the invention provides a suspension carrier module, a sewage treatment tower and a sewage treatment method. The suspension carrier module comprises a module frame, a carrier grid frame and a suspension carrier. According to an embodiment of the utility model, the hollow three-dimensional module frame is formed by a plurality of upright posts and connecting rods; a plurality of grid rods are arranged at the top of the module frame so as to suspend the suspension carrier in the hollow internal space of the module frame to bear a biological membrane; and unlike an accumulation mode of filter materials in the prior art, a suspension mode is adopted for biological carriers in the invention, so the surface utilization rate of the biological carriers can be effectively improved,space gaps between the biological carriers are controllable, the situation that a biological trickling filter is blocked due to accumulation of filter materials is avoided, the biomass per unit volume in the biological treatment device is improved, and sewage treatment efficiency is improved. Moreover, modular design is adopted for the suspension carrier, so factory standardized production can berealized, on-site assembling is convenient and fast, the occupied area of sewage treatment facilities is reduced, and the construction time of the sewage treatment facilities can be effectively shortened.

The invention relates to a NaY molecular sieve preparation method and the NaY molecular sieve prepared by the preparation method. The method comprises: a) making an aluminum source contact a sodium hydroxide solution to obtain a sodium-aluminum solution; b) making a silicon source contact a sodium hydroxide solution to obtain a sodium-silicon solution; c) making the sodium-aluminum solution contact the sodium-silicon solution to obtain a mixture I; and d) making the mixture I contact an acidic aluminum source solution to obtain a gel; and e) crystallizing the gel to obtain the NaY molecular sieve. The method of the invention can be used in industrial production of NaY molecular sieves.

The invention provides an earphone earplug, which comprises an earplug body, the earplug body is an antibacterial silica gel earplug, the antibacterial silica gel earplug is made of antibacterial silica gel, the antibacterial silica gel comprises an antibacterial agent finished product, the antibacterial silica gel comprises 0.04 wt%-6wt% of the antibacterial agent finished product, the antibacterial agent finished product comprises a nano antibacterial agent and a porous antibacterial agent carrier, and the antibacterial silica gel comprises 0.03 wt%-1.8 wt% of the nano antibacterial agent in percentage by weight; the antibacterial agent finished product contains the porous antibacterial agent carrier which has an ultrahigh specific surface area, so that the dispersion of effective components of the antibacterial agent is facilitated, the surface contact property of the antibacterial agent is greatly improved, the utilization rate of the inner surface of the antibacterial agent is improved, and the adding proportion of the antibacterial agent is greatly reduced; the addition amount of the antibacterial agent is low, the problem that the original performance of the silica gel can be influenced by the addition amount of the antibacterial agent with a high proportion is solved, and bad hidden dangers such as the mechanical performance and the wearing skin-friendly comfort of the antibacterial earplug are avoided.

The invention discloses a semiconductor device and a related manufacturing method. The semiconductor device comprises a substrate, and an isolation region and an epitaxial layer which are arranged onthe substrate in parallel. The epitaxial layer comprises a metal oxide semiconductor device; and the upper layer of the isolation region is a second drift region, the isolation region is divided intotwo layers, the thickness of each layer is smaller than that of the epitaxial layer, so that the thickness of the epitaxial layer can be increased, meanwhile, low annealing heat budget can be maintained, transverse diffusion of impurities is reduced, the surface utilization rate of the semiconductor device is increased, and cost is reduced. According to the manufacturing method of the semiconductor device, manufacturing of the epitaxial layer is divided into multiple layers, and meanwhile, the manufacturing of the isolation region is divided into a plurality of layers matched with the epitaxial layers in number, so that the depth of connection between the isolation regions and between the isolation regions and the adjacent layer is reduced, furthermore, annealing time or / and annealing temperature required for connection are reduced, transverse diffusion of impurities in the isolation regions is reduced, the width of the isolation regions is reduced, the area utilization rate of the semiconductor device is increased, and cost is reduced.

The invention discloses a phase change heat sink manufacturing process, and relates to the technical field of heat sink bonding, comprising the following steps of S1, disposing a mounting slot on themounting surface of a heat sink body; S2, embedding and fixing a PCB in the mounting slot, wherein a closed cavity is formed between the PCB and the bottom of the mounting slot; S3, exhausting the airin the closed cavity by a communication tube preformed on the heat sink body; S4, pouring a phase change medium into the closed cavity by the communication pipe; and S5, sealing the communication tube to form a uniform temperature phase change heat dissipation structure. The uniform temperature phase change heat dissipation structure is filled with the phase change medium so as to reduce the thermal resistance between the PCB and the heat sink body. Thus, the heat on the PCB is uniformly transferred to the surface of the heat sink body, and the transverse temperature difference among variouspoints on the surface of the heat sink body and the longitudinal temperature difference of the heat sink body are reduced, thereby achieving a purpose of improving the surface utilization rate of theheat sink body and a purpose of improving a heat dissipation effect.

The invention discloses a semiconductor structure and a forming method thereof, and the method comprises the steps: a substrate which comprises a first region, and the first region comprises a first longitudinal region and a second longitudinal region which are adjacent in the longitudinal direction; a channel body which is located on the substrate, the channel body extends in the longitudinal direction, wherein the channel body comprises a first channel part and a second channel part in the longitudinal direction, the transverse width of the first channel part is larger than that of the second channel part, the transverse direction is perpendicular to the longitudinal direction, in the first region, the first channel part is located in the first longitudinal region, and the second channel part is located in the second longitudinal region; a first gate structure across the first channel feature; and a second gate structure across the second channel feature. According to the embodiment of the invention, by increasing the transverse width of the first channel component, the carrier mobility in the pull-down transistor is improved, the surface utilization rate of the semiconductor structure is improved, and the integration level of the semiconductor structure is correspondingly improved.