834 results about "Thin layer" patented technology

The invention discloses a neodymium-iron-boron magnet, which comprises main phase crystal grains, a thin layer crystal boundary phase and a triangular region crystal boundary phase, and is characterized in that the neodymium-iron-boron magnet comprises 28 to 33 weight percent of R, 0.84 to 0.94 weight percent of B, 0.05 to 1 weight percent of Co, 0.05 to 0.55 weight percent of Cu, 0.3 to 0.6 weight percent of Ga, 0 to 0.55 weight percent of M2, 0.1 to 0.6 weight percent of M3, 66 to 70 weight percent of Fe and the balance of Fe, wherein R is a rare earth element and at least comprises PrNd; the triangular region grain boundary phase comprises an R6T13M1 phase, the element M in the R6T13M1 phase is selected from any two or more elements of Al, Cu, Ga, Ti, Sn and / or Zr, and the element T comprises Fe and / or Co; the sum of the areas of the R6T13M1 phases in the microscopic structure cross section of the neodymium-iron-boron magnet accounts for 5.2%-8.4% of the area of the microscopic structure cross section. The rare earth permanent magnet with high residual magnetism, high coercive force and good squareness consistency is obtained under the condition that no heavy rare earth is added or a small amount of heavy rare earth is added.

Provided herein are methods of depositing molybdenum (Mo) films. The methods involve depositing a thin layer of a molybdenum (Mo)-containing film such a molybdenum oxide, a molybdenum nitride, or a molybdenum oxynitride. The Mo-containing film is then converted to an elemental Mo film. A bulk Mo film may then be deposited on the elemental Mo film. In some embodiments, the process is performed at relatively low temperatures.

The invention belongs to the field of medical instrument coloring agents, and provides a natural anthocyanin endoscope coloring agent. According to the invention, the innovative design of combining a ternary color-stabilizing compound formed by anthocyanin, a co-chromophore and hydroxypropyl beta cyclodextrin with a chitosan sodium alginate polysaccharide system and a composite buffer system is adopted, and the viscosity is controlled to be 200-320 millisecond, the particle size of spray droplets is 40-60 microns, and the thickness of a thin film is 10-30 microns through specific molar ratio compatibility and a genipin crosslinking technology. Through accurate regulation and control, the excellent performance that a double-network thin layer is formed under the calcium ion environment that the absorbance retention rate at 520 nanometers is not lower than 90% and the elution rate is not lower than 90% under the irradiation of hundred thousand lux white light is achieved, the technical problems that a traditional endoscope coloring agent is poor in safety, low in stability and insufficient in mucous membrane contrast ratio are solved, and the wide clinical application value is achieved.

The invention discloses a vacancy-based controllable doping p-type two-dimensional transistor and a preparation method thereof, and mainly solves the problem that accurate controllable doping is difficult to realize in the prior art. According to the scheme, the device comprises an insulating substrate, a two-dimensional material channel layer, a source electrode, a drain electrode, a gate dielectric layer and a gate electrode, wherein the source electrode and the drain electrode are located at the two ends of the two-dimensional material channel layer; the gate dielectric layer is located on the two-dimensional material channel layer and the source and drain electrodes; the method comprises the following steps: depositing a thick mask layer, thinning the mask layer part through photoetching and etching to form a patterned thin layer, bombarding a two-dimensional material and a two-dimensional material under a mask plate thin layer through treated mask layer ions to form a surface vacancy, removing a mask plate, exposing the two-dimensional material in an oxygen flow, and oxidizing to form surface charge transfer doping. According to the invention, under the condition that the two-dimensional material is not damaged and the performance is not influenced, partitioned controllable doping is realized, and the conductivity of the two-dimensional transistor is effectively improved.

The invention discloses a rapid qualitative and quantitative detection method for quantitative analysis of multiple components by single marker of rhodiola rosea, astragalus membranaceus and safflower capsules, and belongs to a detection and analysis technology. According to the method, three traditional Chinese medicines, namely rhodiola rosea, astragalus membranaceus and safflower carthamus, are identified on a thin-layer plate by adopting a thin-layer chromatography method and a same test solution, the pretreatment of a sample and a reference medicinal material only needs 3 hours, 265 mL of a solvent is adopted, spots are clear, and the method is rapid; according to the established single-detection double-evaluation method for salidroside and calycosin-7-glucoside, only an ultraviolet detector is needed, detection is carried out under the wavelength of 270 nm, chromatographic peaks do not interfere with one another, single-detection double-evaluation is achieved, the efficiency is high, and the cost is low. The invention breaks through a traditional identification mode that N traditional Chinese medicine varieties are identified, N test solutions and N thin-layer plates are prepared, N times of development are needed, and N medicinal materials are identified, and establishes a rapid thin-layer identification method for three traditional Chinese medicines on one thin-layer plate by adopting the same test solution and each reference medicinal material supernatant subjected to methanol ultrasonic treatment.

The invention discloses a separated interface photo-thermal catalytic hydrogen production reactor which comprises a liquid storage container, a conveying conduit and a reactor. The liquid storage container is used for accommodating a reaction solution; one end of the conveying conduit is arranged below the liquid level of the reaction solution; the reactor comprises a shell and a porous material arranged in the shell, a thin-layer space is formed by the porous material and the inner wall of the shell, and the thin-layer space is filled with a reaction solution conveyed by the conveying guide pipe to form a thin liquid film; capillary force provided by the porous material is used for sucking the reaction solution in the thin-layer space to the surface of the porous material to carry out photo-thermal catalytic hydrogen production reaction, and the reaction solution in the liquid storage container is supplemented into the thin-layer space through the conveying guide pipe. The reactor separates and decouples a light source and a water source, and is better in space adaptability. The reaction solution is separated from the bulk phase solution, the reaction interface temperature is higher, and the controllability is better. And the photo-thermal catalytic reaction area is not limited by the free liquid surface area of the solution and can be freely expanded.

The invention discloses a simple test method for saturated light-emitting light density of low-basis-weight thermo-sensitive paper, and relates to the technical field of thermo-sensitive material detection.The simple test method comprises the steps that an undeveloped surface image of to-be-tested low-basis-weight thermo-sensitive paper is obtained, and the undeveloped surface image and initial heating parameters are input into a pre-trained generative adversarial network model; generating a predicted color developing light density distribution image corresponding to the saturated color developing state and associated initial heating parameters; and carrying out weighted normalization processing on the optical density distribution data based on thin-layer structure characteristics, and outputting a global saturated optical density value and a color rendering uniformity evaluation result. According to the method, the generative adversarial network and the multispectral imaging technology are combined, so that the optical density distribution in the saturated color development state is directly predicted from the undeveloped surface image, and the test efficiency and the measurement precision are remarkably improved.

The invention provides a heterocyclic compound and an organic electroluminescent device thereof, and belongs to the technical field of organic electroluminescence. The heterocyclic compound provided by the invention has relatively weak metal adsorption capacity, can effectively inhibit metal from being deposited on the surface of a thin layer when being used as a nucleation inhibition layer material to be applied to the organic electroluminescent device, and can effectively improve the light emitting effect of the organic electroluminescent device when being used as a covering layer material, so that the light emitting efficiency of the organic electroluminescent device is improved. And the service life of the device is further prolonged. The heterocyclic compound and the organic electroluminescent device thereof have good application effect and industrialization prospect.

The invention provides a preparation method of modified fumed silica for improving glossiness of printing ink, which comprises the following steps: 1) modifying fumed silica by an amino silane coupling agent to obtain amino modified silica; 2) dissolving thioether diamine and dianhydride in a solvent to obtain a mixed solution, adding amino modified silicon dioxide and a dispersing agent, uniformly dispersing, stirring, carrying out temperature control reaction, and carrying out ultrasonic spray drying to obtain polyamide acid modified fumed silica powder; and 3) performing thermal imidization on the polyamide acid modified fumed silica powder in an inert atmosphere to obtain the modified fumed silica. A polyimide thin layer is arranged on the surface of the modified fumed silica, the refractive index of the modified fumed silica is between that of the resin and that of the fumed silica, light scattering at a phase interface is reduced, and the glossiness of the ink is improved; the thin layer can inhibit the agglomeration of the fumed silica and reduce shielding and scattering; through modification, the fumed silica can be uniformly dispersed in the resin ink, and the transparency and glossiness of the ink are improved.

The invention discloses high-strength stainless steel for a wheel hub cover and a machining process of the high-strength stainless steel, and relates to the technical field of stainless steel machining. The specific processing technology comprises the following steps: weighing a stainless steel raw material, smelting under nitrogen pressurization, carrying out protective pouring to obtain a cast ingot, carrying out hot forging and hot rolling to obtain a hot-rolled plate, carrying out solution treatment and water quenching, sequentially carrying out multi-pass cold rolling and single-pass liquid nitrogen heat preservation cold rolling, annealing and aging treatment to obtain a stainless steel base material, and sequentially carrying out grinding, polishing, oil removal and acid activation to obtain the stainless steel plate. And then placing in an electroplating solution for electro-deposition of an alloy plating layer, cleaning after electro-deposition is finished, then carrying out laser cladding, finally carrying out heat treatment, and cutting a thin layer to obtain the high-strength stainless steel. Wherein cladding powder adopted for laser cladding comprises cobalt powder, chromium powder, nickel powder, aluminum powder, molybdenum powder, titanium powder, zirconium powder, nano carbon-nitrogen metal and tungsten carbide.

The invention belongs to the technical field of metal surface treatment, and discloses a high-uniformity metal surface silver plating process and a corrosion-resistant treatment method thereof.The high-uniformity metal surface silver plating process comprises the following steps that firstly, pretreatment is conducted; step 2, activating treatment; step 3, pre-plating a bottom layer; step 4, electrosilvering; step 5, post-processing; according to the method, pre-plating of the bottom layer and electroplating of silver are combined, a layer of thin nickel or copper is pre-plated firstly, and then electroplating of silver is performed, so that the binding force and uniformity of the silver plating layer are effectively improved, and in the electroplating process, the mode of stirring and circulating the electroplating liquid is adopted, so that silver ions in the electroplating liquid are uniformly distributed, and the uniformity of the plating layer is improved; and a thin aluminum oxide protective film is deposited on the surface of the silver plating layer by adopting a chemical vapor deposition technology, so that the corrosion resistance of the silver plating layer is further improved.

The invention discloses an electromagnetic signal superconducting observation system based on micro-shielding and thermal management and a design method, and the system comprises a high-temperature sensor unit which comprises a pressure-resistant constant-temperature container, a specially-made non-magnetic glass Dewar flask disposed in the pressure-resistant constant-temperature container, and a built-in three-axis high-temperature superconducting sensor. The pressure-resistant constant-temperature container comprises a base body made of carbon fiber reinforced plastics, and a low-frequency frequency-selecting shielding layer, an insulating thin layer, an absorbing layer and a high-frequency shielding layer are sequentially arranged outside the base body. According to the invention, the interference of high-frequency noise in a complex environment and the thermal noise of the three-axis high-temperature superconducting sensor can be significantly reduced. According to the system provided by the invention, the low-noise electromagnetic signal detection of the high-temperature superconducting sensor can be realized in a complex environment, the application range of electromagnetic method technology resource exploration can be widened, and the detection precision can be improved.

The invention provides a heterocyclic derivative and an organic electroluminescent device thereof, and belongs to the technical field of organic electroluminescence. The heterocyclic derivative provided by the invention has relatively weak metal adsorption capacity, when the heterocyclic derivative is used as a nucleation inhibition layer material to be applied to the organic electroluminescent device, deposition of metal on the surface of a thin layer can be effectively inhibited, and meanwhile, the heterocyclic derivative is used as a covering layer material to improve the optical coupling efficiency of the organic electroluminescent device, so that the organic electroluminescent device can be applied to the field of organic electroluminescent devices. And the luminous efficiency of the device is effectively improved. The heterocyclic derivative and the organic electroluminescent device thereof have good application effect and industrialization prospect.

Provided herein are methods of depositing molybdenum (Mo) films. The methods involve depositing a thin layer of a molybdenum (Mo)-containing film such a molybdenum oxide, a molybdenum nitride, or a molybdenum oxynitride. The Mo-containing film is then converted to an elemental Mo film. A bulk Mo film may then be deposited on the elemental Mo film. In some embodiments, the process is performed at relatively low temperatures.

A security element with increased protection against forgery includes at least one first region with structures that reflect an image motif in different spatial regions, such that a moving image is produced for an observer when a light source is moved correspondingly and / or when the viewing angle is changed. When the light source is moved and / or the viewing angle is changed, a movement of the image motif occurs at the same time. Furthermore, an optical effect layer is provided which defines a second region. The optical effect layer is formed as a thin-layer element, wherein the structures are covered by the optical effect layer over their entire surface or partially.

The invention relates to the field of material processing, in particular to a continuous winding graphene metal composite wire roll-extrusion forming method and equipment, and the equipment comprises a base material conveying module, a base material pretreatment and winding integrated module, a covering material conveying and pretreatment integrated module, a heat treatment module, a roll-extrusion forming module and a material pulling module. The six modules are connected and combined together through the discharging ports and the feeding hopper, after metal wires are pretreated, the metal wires are extruded and rotated while being driven to advance, the metal wires are wound with the covering material, multi-dimensional and multi-size covering can be carried out on the metal wires, and the covering efficiency is improved. Pretreatment and roll extrusion forming of a base material and a covering material can be continuously carried out in one procedure, the consumption of graphene is reduced, the coated graphene is separated into a thin layer or even a single layer under the action of shear force in the rotary extrusion friction process, the conductivity and mechanical performance of the composite wire are greatly enhanced, and the service life of the composite wire is prolonged. And finally, the graphene metal composite wires and bars with excellent performance and uniform and fine crystal grains are prepared, the coating success rate is increased, meanwhile, the production efficiency is improved, and the method is high in flexibility and easy to repair and maintain.

The invention belongs to the technical field of optical beam splitting elements, and particularly relates to a beam splitter prism depolarization film, a preparation method thereof, a beam splitter prism and a preparation method thereof. The beam splitter prism depolarization film provided by the invention comprises a first SiO2 film layer, a first Ta2O5 film layer, a first Al2O3 film layer, a metal silver layer, a second Al2O3 film layer, a second Ta2O5 film layer and a second SiO2 film layer which are sequentially laminated, wherein the first SiO2 film layer is in contact with the surface of a substrate. According to the beam splitter prism depolarization film provided by the invention, the number of film layers is obviously reduced, the total film thickness is obviously reduced, the film layer thickness is greatly optimized, the film material consumption cost and the equipment energy consumption are reduced, and the processing efficiency is greatly improved; meanwhile, the risks of film layer breakage and electroplated layer falling are reduced; the film layer contains less thin layers, the equipment monitoring is more accurate, the actual effect is closer to the design, the achievable specification is more strict, and the practical value is excellent.

The present invention discloses an electromagnetic shielding material, a film and a preparation method thereof, wherein the electromagnetic shielding material comprises an A-MXene material, wherein there are bonding points or bonding segments of M-A-M between MXene sheets of the A-MXene material, wherein the A is selected from at least one of elements of group VIIB, VIII, IB, IIB, IIIA, IVA, VA or VIA, and the M represents a transition metal element in the MXene sheet; the preparation method of the electromagnetic shielding material comprises: reacting an initial MXene material with a single substance or compound of A at a predetermined temperature for a predetermined time; the initial MXene material is a MXene material containing a Cl, a Br or an I functional group. The present invention aims at the technical problem that the MXene material containing a Cl functional group has high resistance when applied to the field of electromagnetic shielding, and increases interlayer bonding points or bonding segments of A atoms between MXene sheets to obtain a novel electromagnetic shielding material having both excellent stability and low sheet resistance characteristics.

A display apparatus includes: a substrate including a display area and a peripheral area around the display area, the substrate having a bent portion; a plurality of display elements in the display area; and a thin film encapsulation layer over the plurality of display elements and including a first encapsulation layer, a second encapsulation layer over the first encapsulation layer, and an organic encapsulation layer between the first encapsulation layer and the second encapsulation layer, wherein the second encapsulation layer includes a plurality of inorganic thin layers and a plurality of organic thin layers alternately arranged, and a thickness of the second encapsulation layer is equal to or less than a thickness of the first encapsulation layer.

The utility model discloses an observation channel structure used for a simulation biological display cabin, which comprises a cylinder body, a fence and a simulation prop, the observation channel structure used for the simulation biological display cabin limits the viewing angle of a viewer, avoids the distortion phenomenon caused by large-angle viewing, and is characterized in that the inner side wall of the cylinder body is coated with a light reflecting thin layer, so that the light reflecting thin layer is more transparent. The display screen is made of metal materials or is made of reflective metal materials, pupils of human eyes contract to a certain degree, so that when the human eyes observe a screen image, a stronger sense of space is generated, simulation props and fences are arranged, an experiencer is difficult to judge that displayed content is formed by the screen during close-range watching, the simulation trueness is enhanced, and the experience experience is improved. And the user experience is improved.

The invention provides a method for preparing a beta-Ga2O3 heteroepitaxial thin film with high crystal quality on a sapphire substrate, which comprises the following steps of: selecting a sapphire single crystal wafer as a substrate, cleaning the sapphire single crystal wafer, and putting the cleaned sapphire single crystal wafer into metal organic chemical vapor deposition equipment; with trimethyl gallium or triethyl gallium as a gallium source and oxygen as an oxygen source, growing a beta-Ga2O3 thin layer with the thickness of less than 10 nm; hydrogen is introduced, and the defect bond of the beta-Ga2O3 thin film is etched; the temperature of the substrate is increased to 1000 DEG C or above, oxygen is introduced, annealing is carried out, the defects are further bridged, and oxygen vacancies are reduced; and reducing the temperature of the substrate to the growth temperature, repeating the steps 2-4, and gradually accumulating the thickness to reach an expected value. According to the method, layer-by-layer growth and in-situ defect repair are combined, and the ultra-wide forbidden band beta-Ga2O3 heteroepitaxial crystal film with extremely low defect density and ultra-high quality is successfully prepared.

Provided herein are methods of depositing molybdenum (Mo) films. The methods involve depositing a thin layer of a molybdenum (Mo)-containing film such a molybdenum oxide, a molybdenum nitride, or a molybdenum oxynitride. The Mo-containing film is then converted to an elemental Mo film. A bulk Mo film may then be deposited on the elemental Mo film. In some embodiments, the process is performed at relatively low temperatures.

The invention relates to a method for manufacturing a face-down bonding interconnection three-dimensional electrode of an infrared focal plane array detector, which comprises the following steps of: (1) spin-coating photoresist on an infrared detector chip, exposing by using a mask plate, and developing to form a three-dimensional glue hole; (2) plating a composite metal film on the surface of the chip; (3) spin-coating a protective photoresist, performing ultraviolet light weak flooding exposure on the chip, developing to remove a thin layer of photoresist on the surface of the protective photoresist, and exposing the top composite metal film; (4) etching to remove the top composite metal film; and (5) removing photoresist by using an organic solvent to obtain the three-dimensional electrode. The method is good in process compatibility, the manufactured three-dimensional electrode is good in consistency, and the method is suitable for large-area production.

To provide improved laser-assisted methods and devices for parting or removing relatively thin layers of crystalline material from a substrate, such as a boule or a wafer.SOLUTION: A crystalline material processing method includes forming subsurface laser damage at a first average depth position to form cracks in a substrate interior propagating outward from at least one subsurface laser damage pattern, followed by imaging the substrate top surface, analyzing the image to identify a condition indicative of presence of uncracked regions within the substrate, and taking one or more actions responsive to the analysis. One potential action includes changing an instruction set for producing subsequent laser damage formation (at second or subsequent average depth positions), without necessarily forming additional damage at the first depth position. Another potential action includes forming additional subsurface laser damage at the first depth position.SELECTED DRAWING: Figure 49A

The invention discloses a preparation method of an iron-based cocatalyst modified bismuth vanadate photo-anode, which belongs to a photo-anode preparation technology and comprises the following steps: firstly, introducing oxygen vacancies to the surface of BiVO4 through chemical reduction by using a mild reducing agent sodium sulfite (Na2SO3) under a low-temperature condition by a simple chemical reduction method; the introduction of oxygen vacancies improves the charge transfer efficiency and the carrier separation efficiency. And then loading the NiFeOX nano thin layer on the surface of BiVO4, and optimizing the loading capacity of the cocatalyst by adjusting the reaction time. BiVO4 is cooperatively modified through oxygen vacancies and a cocatalyst NiFeOX. And a feasible strategy is provided for simply designing and preparing a high-performance and high-durability BiVO4-based photo-anode material.

According to the high-resolution seismic wave imaging method and device, on the premise that the modeling precision is improved, migration travel time errors are reduced, a one-way wave pre-stack depth Q migration technology is adopted for the first time based on a grid chromatography Q body establishment technology of structural constraints, the seismic resolution of shale oil thin layers is effectively improved, and the seismic resolution of the shale oil thin layers is improved. On the basis of high-precision grid velocity tomography, common imaging point gather frequency characteristics are picked up, Q tomography inversion is performed by using a peak value frequency shift method, fine establishment of a Q body is realized, a guide seat is mounted on a seismic wave imager, a guide rod can be mounted in the guide seat, two ends of the guide rod can be respectively connected with a bracket and a linkage rod, the linkage rod is connected to a foot stool, and the seismic wave imager is mounted on the foot stool. When the foot stool is pushed by the conical head to be opened, the guide rod can be pushed upwards, the guide rod can drive the support to move upwards, the support can push the solar panel, opening is achieved, the seismic wave imager can be rapidly placed when used, and rapid use is achieved.

The invention discloses a high-stability light-absorption low-reflection film which comprises a substrate layer, an Al2O3 layer, Ti layers, SiO2 layers and a hydrophobic layer, wherein the Ti layers and the SiO2 layers are alternated with each other; wherein the sum of the total optical thicknesses of the Ti layers and the SiO2 layers which are alternated with each other is greater than 4.4726; the invention further discloses a preparation method of the high-stability light-absorption low-reflection film. According to the invention, the Ti layer with a higher refractive index is creatively selected to replace a traditional black film made of a high-refractive-index material, and the high-refractive-index material and the low-refractive-index material are mutually alternated, so that the effective refractive index of the film layer is close to the refractive index of the substrate layer; the problem that the spectral reflectivity is unstable due to the fact that a thin layer is too sensitive in the plating process of a traditional light-absorbing low-reflection film is solved, and the stability, compactness and other performance of the film layer are effectively improved.

The invention relates to the field of catalytic materials, and provides a metal oxide composite material for preparing ethane through photocatalytic methane conversion and a preparation method of the metal oxide composite material. The material is a ternary composite functional material with a multi-stage structure and multi-scale characteristics, and comprises a micron-scale porous alumina carrier skeleton which is prepared by a freeze drying method and has directional through columnar pore channels, CeO2 nanorods which grow in the pore channels in situ, and an anatase type TiO2 shell layer which coats the surfaces of the CeO2 nanorods. The composite material forms a CeO2-TiO2 core-shell structure and a TiO2 thin layer on the inner wall of a pore channel, and has excellent photocatalytic activity and thermal shock resistance. The activity attenuation rate does not exceed 10% after irradiation of a light source with the wavelength of 365 nm and 20 times of thermal cycles at the temperature of 25-800 DEG C. The preparation method comprises the steps of freeze-drying forming and heat treatment of an aluminum oxide framework, in-situ hydrothermal synthesis of CeO2 nanorods and hydrolytic deposition and calcination of a TiO2 shell layer, the process is simple and convenient, the repeatability is high, and the method is suitable for efficient and stable photocatalysis application.

The utility model belongs to the technical field of resistivity test, and discloses a resistivity test probe head. The resistivity test probe head comprises a probe assembly and four conductive probes, the probe assembly comprises a probe and an elastic assembly, the probe is provided with an accommodating cavity and four penetrating holes, and the penetrating holes are communicated with the accommodating cavity; the elastic assembly is arranged in the containing cavity, and one end of the elastic assembly is connected to the inner wall of the containing cavity. The four conductive probes correspondingly pass through the four through holes and are connected with the other end of the elastic assembly. The bottom end passing surface of the conductive probe is in contact with the outer surface of the thin layer to be tested, so that the contact area of the conductive probe and the thin layer to be tested is increased, the pressure intensity is reduced, and test data errors caused by the fact that the probe pierces into a bottom layer material are avoided. The elastic assembly can enable the bottom end of the conductive probe to abut against the interior of the surface layer of the thin layer to be tested, the bottom end of the conductive probe is a horizontal plane or a curved surface, the abutting area of the conductive probe and the thin layer to be tested can be increased, stable contact of testing is guaranteed, and repeatability of testing data becomes good.

The invention relates to a transmission electron microscope sample preparation method of a transition metal chalcogenide layered material, which comprises the following steps: grinding a transition metal chalcogenide block, and selecting a slice in the transition metal chalcogenide block; placing the sheet on an adhesive tape, repeatedly folding and bonding for many times, tearing the adhesive tape for stripping, attaching the adhesive tape obtained after stripping to a transfer substrate, gently applying force to enable the surface of the adhesive tape to be tightly attached to the transfer substrate, and then tearing off the adhesive tape from the transfer substrate to obtain a substrate attached with a stripping thin layer; immersing the substrate in an infiltration solvent, carrying out ultrasonic treatment, and separating a transfer substrate and a stripping thin layer of the substrate; and taking out the transfer substrate in the infiltration solvent, immersing the electron microscope grid on the infiltration solvent liquid film on the surface of the transfer substrate, moving the electron microscope grid to enable the stripping thin layer to be carried on the electron microscope grid, drying, and waiting for observation of the transmission electron microscope. Compared with the prior art, the method is easy and convenient to operate, low in cost and free of additional instruments, and the large-area few-layer thin-area sample can be obtained.