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32results about How to "Contact flat" patented technology
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Reciprocal form structure polymer solar cell and preparation method thereof
InactiveCN101577313AAvoid priceLow priceSolid-state devicesSemiconductor/solid-state device manufacturingElectronic transmissionEvaporation
The invention belongs to the technical field of polymer solar cells and particularly relates to a reciprocal form electrode polymer solar cell using TiO2 as an electronic transmission layer, CuPc as a cavity transmission layer and a preparation method thereof. The method includes the steps of: using sol-gel technology to grow a layer of uniform and compact nanocrystal titanium dioxide (TiO2) film on an ITO glass substrate, then spin-coating a layer of P3HT:PCBM solution dissolved by dichlorobenzene, after annealing, using thermal evaporation to grow a layer of CuPc with certain thickness and finally evaporating Au electrode. The polymer solar cell prepared by utilizing the method solves two problems of the traditional polymer solar cell, namely that the mixed solution of 3, 4-EDOT and polystyrolsulfon acid corrode the surface of ITO glass, and the excessive thinness of cathode buffer layer LiF causes the operating process to be difficult to be controlled accurately.
Owner:JILIN UNIV
Aqueous PVDF coated lithium ion battery diaphragm and preparation method thereof
ActiveCN108847468AImprove distribution uniformityHigh thickness controllabilityCell seperators/membranes/diaphragms/spacersSecondary cellsWater basedAdhesive
The invention discloses a preparation method of an aqueous PVDF coated lithium ion battery diaphragm. The preparation method comprises the following steps of adding a dispersing agent and a thickeningagent into water, uniformly stirring, and adding PVDF, and enabling PVDF to be blended into water to prepare a turbid liquid; enabling water-based UV resin, a water-based adhesive, a photoinitiator and a polymerization inhibitor to be added in to the residual water, performing dispersing uniformly, introducing the PVDF turbid liquid, and uniformly dispersing to prepare PVDF slurry; and enabling the PVDF slurry to be coated on one side or two sides of a lithium ion battery base membrane which is subjected to corona treatment, forming a point matrix type distribution coating layer, and performing curing to obtain a finished product. The method has the advantages that the water-based UV photo-curing technology is adopted, and the coating layer can be immediately dried, the energy consumptionis lower, and the problem that the diaphragm is deformed due to heat and tension is avoided. The drying time of the diaphragm coating layer can be shortened to 8-15 seconds, so that the continuous and stable large-scale production can be facilitated.
Owner:JIANGSU QINGTAO ENERGY TECH
Fixture used for moulding of proton exchange membrane fuel cell membrane electrode and preparation method for proton exchange membrane fuel cell membrane electrode
ActiveCN103170928AEasy to operateGuaranteed patencyCell electrodesWork holdersEngineeringProton exchange membrane fuel cell
The invention provides a fixture used for moulding of a proton exchange membrane fuel cell membrane electrode and a preparation method for the proton exchange membrane fuel cell membrane electrode. The preparation method comprises the following steps: membrane electrode components are placed between a first flat plate and second flat plate of the fixture in sequence; torque of a lead screw of the fixture is set as 0.5 Nm to 5Nm and a fastening lead screw abuts against the second flat plate through a screw hole in the first flat plate; and the fixture is heated at a temperature from 140 DEG C to 250 DEG C for 2 min to 30 min so that the proton exchange membrane fuel cell membrane electrode is obtained. According to the fixture used for moulding of the proton exchange membrane fuel cell membrane electrode and the preparation method for the proton exchange membrane fuel cell membrane electrode, the fixture is formed by the first flat plate and the second flat plate and the like and a mould pressing method for preparation of the membrane electrode is regulated, so that the discharging performance of the membrane electrode is good and electrochemical performance of a fuel cell can be improved. The preparation method for the proton exchange membrane fuel cell membrane electrode is simple and easy to operate, low in cost due to the fact that expensive mould pressing equipment is not needed and beneficial to popularization.
Owner:CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
LED chip glue dispensing machine
InactiveCN109465153ANot easy to solidifyPrevent solidificationLiquid surface applicatorsSpraying apparatusEngineeringMechanical engineering
The invention discloses an LED chip glue dispensing machine. The LED chip glue dispensing machine comprises a base, a control device arranged on the base, a glue gun rack capable of moving up and down, a glue gun arranged on the glue gun rack and a feeding device connected with the glue gun. The glue gun is internally provided with a stirring cavity. A stirring shaft is arranged in the stirring cavity. The top of the stirring cavity is provided with a feed port. According to the LED chip glue dispensing machine, the stirring cavity and the stirring shaft are arranged in the glue gun to conductstirring on glue in the glue gun, and then the glue is made to flow continuously. Accordingly, the phenomenon that the glue gun gets blocked due to glue solidification is avoided.
Owner:HANGZHOU XIAOCHENG IND DESIGN CO LTD
Pressure cell fixing device for measuring tunnel surrounding rock pressure and construction method
ActiveCN108151920AReduce the effect of lateral forceImprove accuracyForce measurementRubber ringPressure cell
The invention discloses a pressure cell fixing device for measuring the tunnel surrounding rock pressure and a construction method. The device comprises an annular rubber ring which is arranged on anouter ring of a pressure cell and used for fixing the pressure cell; the bottom of the pressure cell is supported by a base support; the base support and the rubber ring are arranged in an anti-sideslip outer sleeve, and the angle of the pressure cell and the fitting degree of the pressure cell fitting into the surrounding rock surface are adjusted through adjusting bolts; the anti-sideslip outersleeve is connected with a lifting sleeve which sleeves a base fixing rod, and the bottom of the base fixing rod is fixed to a fixed base.
Owner:SHANDONG UNIV +1
Small coiled material automatic unrolling trolley and method for unrolling coiled material
The invention relates to the technical field of building construction, in particular to a small coiled material automatic unrolling trolley and a method for unrolling a coiled material. The small coiled material automatic unrolling trolley comprises a moving chassis. One end of the moving chassis is connected with a traction advancing mechanism, and the other end of the moving chassis is connected with a coiled material laying-pressing mechanism. The coiled material laying-pressing mechanism comprises a laying-pressing platform connected with the moving chassis. The lower end of the laying-pressing platform is in coupling connection with a laying through roller. A coiled-material-wound storing roller is erected on the laying-pressing platform through a storing support. One end of the coiled material is wound around the storing roller, and the other end of the coiled material covers the laying through roller and is pressed on the ground through the bottom end of the laying through roller. By means of the laying-pressing mechanism and a spray nozzle, the problem that the coiled material needs to be manually heated and then laid on the surface of a building, so that the working efficiency is low, and when the surface of the building is uneven, large gaps usually exist between the coiled material and the sinking parts or protruding parts of the building is solved.
Owner:东方雨虹民用建材有限责任公司
Rotatable bridge frame
PendingCN107237488AImprove safety and usabilityImprove construction efficiencyScaffold accessoriesBuilding support scaffoldsEngineering
Owner:福建建中建设科技有限责任公司
Manufacture of heat pipe for heat dissipating plate
InactiveCN1421924AImprove structural strengthImprove thermal efficiencySemiconductor/solid-state device detailsSolid-state devicesWorking fluidHeat conducting
The manufacture of heat pipe for heat dissipating plate includes machining the heat dissipating plate to form several heat conducting passages with enclosed end; enclosing the opened ends of the heatconducting passages while leaving at least one; filling working fluid and pumping vacuum via the left end and finally sealing.
Owner:HONG MANG
Laminating process and jig for curved glass screen and decorative film
PendingCN114312116AImprove yieldImprove product qualityLamination ancillary operationsDecorative surface effectsPolymer scienceHot melt
The invention provides a curved glass screen and decorative film laminating process which is characterized by comprising the following steps of S1, machine table laminating and S2, water bath heating. The curved glass screen and decorative film laminating process and jig have the advantages that the yield is high, the product quality can be effectively improved, and the production cost is reduced; compared with OCA (optical clear adhesive), the hot melt adhesive is flat in surface, good in uniformity, high in hardness, high in viscosity and not prone to deformation and rebound during pressing, the problems of wrinkles, bubbles, upwarping and the like can be effectively avoided, and therefore the hot melt adhesive has great economic value and practical value.
Owner:深圳市亿米科鑫科技有限公司
ZnO nanorod array/polyvinylcarbazole/graphene hybrid fiber-like ultraviolet photodetector and method based on interface optimization
ActiveCN106847989BQuick responseHigh switching ratioFinal product manufactureSemiconductor devicesFiberCarbazole
The invention discloses a zinc oxide nanorod array / polyvinyl carbazole / graphene hybridized fiber-shaped ultraviolet light detector based on interface optimization and a preparation method thereof. The preparation method comprises the following steps of using a fine metal wire as a substrate, growing a zinc oxide nanorod array at the surface of the ine metal wire in the vertical direction, uniformly covering the surface of the zinc oxide nanorod array with a polyvinyl carbazole thin layer, and coating the outer surface of the polyvinyl carbazole thin layer with a single layer of graphene thin film, wherein a fine sliver wire leading-out electrode is blended in the graphene thin film. The preparation method has the advantages that the problem of poor interface contact in the traditional fiber-shaped detector is solved, the surface-contact surface electrode is used for replacing the line-contact surface electrode, and the property of the detector is improved.
Owner:NANJING UNIV OF SCI & TECH
Hollow carbon rod, preparation method and application thereof and die head used in preparation process
PendingCN110993888AUniform internal compaction densityHigh strengthNon-aqueous electrolyte cellsPrimary cell electrodesElectrolytic agentElectrical battery
The invention relates to a hollow carbon rod, a preparation method and application thereof and a die head used in the preparation process. The hollow carbon rod is a cylindrical hollow carbon rod; thecylindrical hollow carbon rod is obtained through one-step molding. The internal hollow structure can ensure that the battery has sufficient free electrolyte; the hollow carbon rod is always in a fully infiltrated state; the difference of discharge capacities of the battery in different discharge postures can be obviously reduced; the hollow carbon rod has relatively high strength; battery assembly process, automation can be realized by using simple equipment in the process of loading the hollow carbon rod into the steel shell; in addition, no micro powder falls off on the diaphragm in the loading process, the risk of micro short circuit of the battery is reduced, the hollow carbon rod formed in one step is flat in end face and can be in flat contact with the upper diaphragm and the lowerdiaphragm of the battery, the phenomenon of falling off or uneven diaphragms cannot occur in the high negative pressure state in the vacuum liquid injection process, and the current collector is convenient to install.
Owner:EVE ENERGY CO LTD
Improved network filter housing
The invention relates to the technical field of a network filter and especially relates to an improved network filter housing. The improved network filter housing comprises a base. The base is a rectangular box body, of which the top surface is opened. The side walls of the base are provided with a plurality of L-shaped pins. The pins comprise vertical sections and horizontal sections, wherein the upper ends of the vertical sections extend out of the top surface of the base, and the horizontal sections are arranged under the bottom surface of the base; and one end of each horizontal section is connected with the lower end of the corresponding vertical section, and the other end extends to the outer side of the base and is vertical to the side wall of the base. According to the improved network filter housing, through improving the shapes of the pins and the positions of the pins, the length of the pin extending out of the base is reduced, so that the pins are not easy to slant and deform; the portions, exposed in the air, of the pins are smaller, so that oxidation is prevented; and the face, wherein the pin is contacted with the circuit board is more smooth, so that tin consumption amount can be reduced during welding, and the product quality and production efficiency are improved.
Owner:DONGGUAN MOTIVE ELECTRONICS TECH
Radio frequency power transistor based on inversion process and forming method thereof
ActiveCN102867753AGuaranteed accuracyReduce areaSemiconductor/solid-state device manufacturingSemiconductor devicesDielectricGate dielectric
The invention discloses a radio frequency power transistor based on an inversion process and a forming method thereof. The method comprises the following steps of: providing a substrate; forming a transition layer; forming a source connecting wire, a drain connecting wire and a gate connecting wire; forming interlayer dielectric layers on the transition layer, and filling the interlayer dielectric layers between the connecting wires; forming metal contact layers on the interlayer dielectric layers, and connecting the metal contact layers with the connecting wires; etching the metal contact layers to form N sources, N drains and 2N-1 gates, which are parallel mutually, wherein the sources, the gates and the drains are adjacently arranged sequentially according to the order of source-gate-drain-gate, the N sources are connected with the source connecting wire, the N drains are connected with the drain connecting wire, and the 2N-1 gates are connected with the gate connecting wire; forming a gate dielectric layer; and forming a graphene thin film as a channel layer. According to the method disclosed by the invention, the inversion process is adopted, the implementation is easy, and the method is stable and reliable; and the device disclosed by the invention has an inversion structure, the source-drain contact is small, and the gate control ability is strong.
Owner:TSINGHUA UNIV
Agricultural equipment for precise fertilizing
ActiveCN109496525ASpray evenlyImprove the mixing effectPlantingRotary stirring mixersAgricultural engineeringPesticide
The invention discloses a piece of agricultural equipment for precise fertilizing, the agricultural equipment comprises a vehicle body, a bracket arranged on the vehicle body, a spraying device arranged on the bracket, a fertilizer apparatus arranged on the bracket, and a valve device matched with the spraying device and the fertilizer apparatus; the vehicle body comprises wheels capable of movingback and forth, a drive piece used for driving the wheels to move back and forth, and a wheel shaft detachably connected with the wheels; the vehicle body comprises a pesticide barrel, a stirring device arranged in the pesticide barrel, and a grinding device matched with the stirring device; the stirring device comprises a stirring paddle capable of moving back and forth, a gear ring used for driving the stirring paddle to move back and forth, and a stirring transmission structure used in transmission connection with the gear ring and the wheel shaft; due to the arrangement of the stirring device and the grinding device, a liquid pesticide is stirred, the even mixing of the pesticide is guaranteed, a solid fertilizer is also grinded, the fertilizer is guaranteed not to cake because of themoisture, the fertilizer is more favorable for absorption by a crop, and the better growth of the crop is guaranteed.
Owner:HANGZHOU LVCHENG TECH CO LTD
Flexible circuit board as well as hot-pressed device and method for manufacturing same
ActiveCN101636036BContact flatHigh precisionPrinted circuit secondary treatmentElectrical connection printed elementsElectricityInsulation layer
The invention relates to a flexible circuit board as well as a hot-pressed device and a method for manufacturing the same. The flexible circuit board comprises a main part and a contact part, wherein the contact part is arranged at one end of the main part; the main part comprises a first insulation layer, a plurality of conductive lines and a protecting layer; the conductive lines are arranged between the first insulation layer and the protecting layer; the contact part comprises a second insulation layer connected with the first insulation layer of the main part; the second insulation layercomprises a contact surface and a bottom surface opposite to the contact surface; the surface of the contact surface is provided with a plurality of conductive terminals for being electrically connected with an external line; the conductive terminals are electrically connected with the conductive lines of the main part, and a reinforced layer is covered on the bottom surface. The invention has simple structure, simple and convenient assembly and multiple functions. The flexible circuit board is difficultly influenced by the thermal expansion factor and can improve the press precision when being pressed with an external electronic element.
Owner:芜湖天马汽车电子有限公司
Sealant tape
ActiveCN110072916AImprove sealingIncrease contactAdhesive processesNon-macromolecular adhesive additivesPolymer sciencePolysulfide
Various embodiments disclosed related to sealant tape. The sealant tape can include a cured product of a sealant composition including a curable liquid that includes a polysulfide, a polythioether, acopolymer thereof, or a combination thereof. The sealant composition also includes a curing agent for curing the curable liquid. Various embodiments provide cured products of the sealant composition,sealant tapes including the cured product, and sealant tapes including any suitable material with an adhesive pattern thereon.
Owner:3M INNOVATIVE PROPERTIES CO
Silicon wafer alloy process
InactiveCN109755143AAvoid offsetContact flatSemiconductor/solid-state device manufacturingAlloyGraphite
The invention provides a silicon wafer alloy process. The silicon wafer alloy process comprises primary alloying and secondary alloying which are sequentially performed, wherein the primary alloying sequentially comprises the steps of lamination, first-time die loading, pressurization, first-time sintering and first-time de-molding, and the secondary ally sequentially comprises the steps of second-time die loading, pressurization, secondary sintering and secondary de-molding. The silicon wafer alloy process has the beneficial effects that alloying for two times is employed, a silicon wafer anda lead-tin welding material are prevented from deviating during alloying by placing a graphite sleeve ring in a die sleeve, a die cover is placed at the uppermost layer so as to facilitate pressurization by an oil press machine, the contact of the lead-tine welding material and the silicon wafer in alloying is enabled to be smooth, and favorable wettability with the silicon wafer after melting ofthe welding material is ensured.
Owner:TIANJIN HUANXIN TECH DEV
Grinding and transporting device for printer casings
InactiveCN109909830AFree from pollutionNo harm to healthGrinding work supportsPlane surface grinding machinesEngineeringConveyor belt
The invention discloses a grinding and transporting device for printer casings. The grinding and transporting device includes a conveyor belt, a mounting plate, a pressing plate, a fixing plate, a dust storage box, a limiting box, a telescopic column, fastening screws, a grinding plate, a dust suction pipe, a damping spring, a connecting plate, a hydraulic column and an electric motor. The grinding and transporting device has the beneficial effects that by arranging the limiting plate and the mounting plate on both ends of the conveyor belt respectively, the grinding plate and the dust suctionpipe on the mounting plate and the limiting plate can not only polish the printer casings on the conveyor belt, but also absorb and store the impurities generated by the grinding to protect the environment from pollution; the hydraulic column on one side of the fixing plate can adjust the position of the pressing plate according to the sizes of different printer casings so that the sides of the casings can be polished more smoothly; the damping spring between the pressing plate and the connecting plate makes the pressing plate make elastic contact with the casings to protect the casings fromdamage; and the device has the advantages of simple structure, convenient use, high work efficiency, environmental friendliness and sanitation.
Owner:李凤英
Novel cable
PendingCN110931157AEasy to slideFeel goodNon-insulated conductorsFlexible cablesIsolation layerStructural engineering
The invention discloses a novel cable. The cable comprises a first wiring area and a second wiring area which are arranged in a layered mode from inside to outside, a first core wire set is arranged in the first wiring area, a second core wire set is arranged in the second wiring area, and a first isolation layer used for reducing friction force is arranged between the first wiring area and the second wiring area. Through the layered structure, when the cable is used, the wire sequence is neat, the cable is not easy to deform, the contact between the core wire groups is extremely smooth and soft, and the service life is prolonged.
Owner:CHANGSHU HONGLIN WIRE & CABLE CO LTD
Equipment for hydrogen production
InactiveCN110982556AEasy to installAvoid churnHydrogenGasification processes detailsThermodynamicsCombustion
Equipment for hydrogen production is disclosed, including a steam boiler, a reaction furnace matched with the steam boiler, a purification furnace matched with the reaction furnace, and an air feedingdevice matched with the reaction furnace. The air feeding device includes an air feeding pipe, a branch pipe communicated with one end of the air feeding pipe, and an air feeding member communicatedwith the other end of the air feeding pipe. An auxiliary heating device is arranged in the steam boiler. Through the branch pipe, air is uniformly fed into the reaction furnace, so that fuel in the reaction furnace can be combusted more sufficiently, resource waste caused by insufficient combustion is avoided, sufficient combustion of the fuel provides better and faster heating, and the hydrogen preparation efficiency is increased; and through the auxiliary heating device, the heating speed is further increased.
Owner:南京幸庄科技创新产业园管理有限公司
Switch tube fixing device and switch tube assembly
PendingCN112423530AEven by forceIncrease cooling areaSupport structure mountingCooling/ventilation/heating modificationsPhysicsEngineering
The invention discloses a switch tube fixing device and a switch tube assembly. The switch tube fixing device comprises a body part which is connected with a PCB and a radiator, wherein at least one fixing groove is formed in the body part and used for installing and fixing a switch tube. The switch tube fixing device and the switch tube assembly effectively solve the problems that a direct screwfixing mode for the switch tube in the prior art is small in heat dissipation area, the risk that the switch tube is damaged exists and general assembly cannot be achieved.
Owner:GREE ELECTRIC APPLIANCES INC OF ZHUHAI
A small coil automatic spreading vehicle and a coil spreading method
Owner:东方雨虹民用建材有限责任公司
A pressure cell fixing device and construction method for measuring tunnel surrounding rock pressure
ActiveCN108151920BReduce the effect of lateral forceImprove accuracyForce measurementRubber ringClassical mechanics
The invention discloses a pressure cell fixing device for measuring the tunnel surrounding rock pressure and a construction method. The device comprises an annular rubber ring which is arranged on anouter ring of a pressure cell and used for fixing the pressure cell; the bottom of the pressure cell is supported by a base support; the base support and the rubber ring are arranged in an anti-sideslip outer sleeve, and the angle of the pressure cell and the fitting degree of the pressure cell fitting into the surrounding rock surface are adjusted through adjusting bolts; the anti-sideslip outersleeve is connected with a lifting sleeve which sleeves a base fixing rod, and the bottom of the base fixing rod is fixed to a fixed base.
Owner:SHANDONG UNIV +1
A kind of three-layer nanoporous film and its preparation method and application
ActiveCN109943825BQuality improvementContact flatMicrobiological testing/measurementNanotechnologyBi layerThin layer
The invention discloses a three-layer nanopore thin film and a preparation method and application thereof. The preparation method comprises the following steps that a base plate is provided, two-layerSi3N4 / SiO2 nano thin films deposit on the surfaces of the two sides of the base body, a layer of Si3N4 thin film deposits on the top SiO2 thin film layer, the thin film on one side of the base boy isetched to form a base body releasing window, the base plate is etched so that the three-layer nano thin film can be obtained, reactive ion etching is adopted to etch the Si3N4 thin film on the releasing window of the base body to achieve thinning, a suspended three-layer nano thin film structure is obtained, and helium ion beams are used for carrying out etching so that a three-layer nano throughhole can be obtained. According to the preparation method for the three-layer nanopore thin film, an Si3N4 / SiO2 layer is formed through deposition, the Si3N4 top layer is formed through atom deposition or molecule vapor deposition, the thicknesses of all layers are uniform and controllable, contact faces between the layers are flat, the quality of the thin layer is stable, the preparation methodis easy in operation, it does not need to thin the deposition layer, the production efficiency is improved, and the production cost is saved.
Owner:GUANGDONG UNIV OF TECH
An electromagnetically driven adaptive carbon ribbon printing mechanism
ActiveCN105109216BIncrease contactContact flatPower drive mechanismsEngineeringElectromagnetic drive
The invention relates to a solenoid drive self-adaption thermal transfer ribbon printing mechanism which comprises a rack, a printer component, a thermal transfer ribbon and a base plate, wherein the printer component is arranged at one side of the rack, the base plate is arranged at the other side of the rack, and the thermal transfer ribbon is located between the printer component and the base plate; when a printing command is inputted to the printer component, and an electromagnetic drive mechanism drives a printing head to move to the direction of a print medium and close up to an elastic gasket, the printing head swings automatically under the support of a pin shaft, so that the thermal transfer ribbon and a printed object are completely flat to each other in the width direction of a printing breadth of the printing head, and the pressure is uniform, a printed stamp is even in depth and clear. Through the concrete design, the mechanism provided by the invention has the advantages of simple structure, convenient adjustment, reliable operation and the like.
Owner:WENZHOU FEIYUE FINANCIAL EQUIP CO LTD
A kind of aqueous PVDF-coated lithium-ion battery diaphragm and preparation method thereof
ActiveCN108847468BImprove distribution uniformityHigh thickness controllabilityCell seperators/membranes/diaphragms/spacersSecondary cellsPhysical chemistryLithium-ion battery
The invention discloses a preparation method of a water-based PVDF-coated lithium-ion battery diaphragm. The preparation steps are: adding a dispersant and a thickener to water, stirring evenly, adding PVDF, and merging the PVDF into water to prepare a suspension Add water-based UV resin, water-based binder, photoinitiator, polymerization inhibitor to the remaining water, disperse evenly, then import PVDF suspension, disperse evenly to prepare PVDF slurry; PVDF slurry is coated on corona One or both sides of the treated lithium-ion battery base film form a dot-matrix distributed coating, and cure the finished product. The advantages are: using water-based UV light curing technology, the coating can be dried immediately, with lower energy consumption, and there is no need to worry about the deformation of the diaphragm due to heat and tension. The drying time of the diaphragm coating can be reduced to 8‑15s, which is conducive to continuous and stable mass production.
Owner:JIANGSU QINGTAO ENERGY TECH
Three-layer nanopore thin film and preparation method and application thereof
ActiveCN109943825AProne to cracksCan control the forming surfaceMicrobiological testing/measurementNanotechnologyHelium ionsThin layer
The invention discloses a three-layer nanopore thin film and a preparation method and application thereof. The preparation method comprises the following steps that a base plate is provided, two-layerSi3N4 / SiO2 nano thin films deposit on the surfaces of the two sides of the base body, a layer of Si3N4 thin film deposits on the top SiO2 thin film layer, the thin film on one side of the base boy isetched to form a base body releasing window, the base plate is etched so that the three-layer nano thin film can be obtained, reactive ion etching is adopted to etch the Si3N4 thin film on the releasing window of the base body to achieve thinning, a suspended three-layer nano thin film structure is obtained, and helium ion beams are used for carrying out etching so that a three-layer nano throughhole can be obtained. According to the preparation method for the three-layer nanopore thin film, an Si3N4 / SiO2 layer is formed through deposition, the Si3N4 top layer is formed through atom deposition or molecule vapor deposition, the thicknesses of all layers are uniform and controllable, contact faces between the layers are flat, the quality of the thin layer is stable, the preparation methodis easy in operation, it does not need to thin the deposition layer, the production efficiency is improved, and the production cost is saved.
Owner:GUANGDONG UNIV OF TECH
Fixture for forming proton exchange membrane fuel cell membrane electrode and preparation method of proton exchange membrane fuel cell membrane electrode
ActiveCN103170928BEasy to operateGuaranteed patencyCell electrodesWork holdersEngineeringProton exchange membrane fuel cell
The invention provides a fixture used for moulding of a proton exchange membrane fuel cell membrane electrode and a preparation method for the proton exchange membrane fuel cell membrane electrode. The preparation method comprises the following steps: membrane electrode components are placed between a first flat plate and second flat plate of the fixture in sequence; torque of a lead screw of the fixture is set as 0.5 Nm to 5Nm and a fastening lead screw abuts against the second flat plate through a screw hole in the first flat plate; and the fixture is heated at a temperature from 140 DEG C to 250 DEG C for 2 min to 30 min so that the proton exchange membrane fuel cell membrane electrode is obtained. According to the fixture used for moulding of the proton exchange membrane fuel cell membrane electrode and the preparation method for the proton exchange membrane fuel cell membrane electrode, the fixture is formed by the first flat plate and the second flat plate and the like and a mould pressing method for preparation of the membrane electrode is regulated, so that the discharging performance of the membrane electrode is good and electrochemical performance of a fuel cell can be improved. The preparation method for the proton exchange membrane fuel cell membrane electrode is simple and easy to operate, low in cost due to the fact that expensive mould pressing equipment is not needed and beneficial to popularization.
Owner:CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
RF power tube based on inversion process and its forming method
ActiveCN102867753BGuaranteed accuracyReduce areaSemiconductor/solid-state device manufacturingSemiconductor devicesGate dielectricContact layer
The invention discloses a radio frequency power transistor based on an inversion process and a forming method thereof. The method comprises the following steps of: providing a substrate; forming a transition layer; forming a source connecting wire, a drain connecting wire and a gate connecting wire; forming interlayer dielectric layers on the transition layer, and filling the interlayer dielectric layers between the connecting wires; forming metal contact layers on the interlayer dielectric layers, and connecting the metal contact layers with the connecting wires; etching the metal contact layers to form N sources, N drains and 2N-1 gates, which are parallel mutually, wherein the sources, the gates and the drains are adjacently arranged sequentially according to the order of source-gate-drain-gate, the N sources are connected with the source connecting wire, the N drains are connected with the drain connecting wire, and the 2N-1 gates are connected with the gate connecting wire; forming a gate dielectric layer; and forming a graphene thin film as a channel layer. According to the method disclosed by the invention, the inversion process is adopted, the implementation is easy, and the method is stable and reliable; and the device disclosed by the invention has an inversion structure, the source-drain contact is small, and the gate control ability is strong.
Owner:TSINGHUA UNIV
Traditional Chinese medicine air drying device
InactiveCN109900093AImprove drying efficiencyFully contactedDrying gas arrangementsDrying chambers/containersEngineeringFan blade
The invention discloses a traditional Chinese medicine air drying device, and relates to the field of medicinal material production. The traditional Chinese medicine air drying device comprises a base, a motor box is fixedly mounted at the top of the base, a servo motor is fixedly mounted in the motor box, and a rotating disc is movably mounted at the top of the motor box. An output shaft of the servo motor penetrates through the motor box to be fixedly connected with the bottom of the rotating disc, and the top of the rotating disc is welded to the bottom end of a rotating column. A sliding groove is formed in the top of the rotating column. The traditional Chinese medicine air drying device is provided with the motor, a placing frame is rotated by starting the motor and being matched with the rotating column and a sliding rod, through the rotation of the placing frame, Chinese medicine on the placing frame can still be fully in contact with the air in the case of small wind force andis dried by the air; and meanwhile, a fan seat and fan blades on the rotating column are matched to form air flow to pass through the placement frame, so that the Chinese medicine on the placement frame is air-dried, and the efficiency of air drying the Chinese medicine is increased.
Owner:扬州艾普环保工程有限公司
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