53results about How to "The production process is simple" patented technology

The application provides a split-gate flash memory and a manufacturing method thereof. The memory comprises a semiconductor substrate, has an active region and an isolation structure, and part of the surface of the isolation structure is lower than the surface of the active region to form a groove; a coupling medium layer covers the top and sidewall of the active region; a floating gate is located on the surface of the coupling medium layer and surrounds the top and sidewall of the active region and does not completely fill the groove; an inter-electrode medium layer is located on the surface of the floating gate; a control gate is located on the surface of the inter-electrode medium layer and fills the remaining part of the groove; a word line is located on the sidewall of the floating gate and the control gate; and a tunneling medium layer is located between the word line and the floating gate, the control gate and the substrate. The application enhances the control force by three-dimensionally surrounding the channel with the floating gate, reduces the risk of punch-through, increases the coupling rate by filling the groove with the control gate, reduces the operating voltage, and improves the reliability of the device.

The invention relates to the technical field of clinical detection of cerebrospinal fluid, and particularly discloses a smear device for detecting cerebrospinal fluid, which mainly comprises a sample tube and a piston assembly, the sample tube comprises a first tube body, a second tube body and a third tube body; the second pipe body is located above the first pipe body, a liquid outlet hole is formed in the bottom, and a liquid inlet hole is formed in the side wall; the bottom of the third pipe body is communicated with the liquid inlet hole through a flow channel; the piston assembly comprises a piston, a handle part and a center rod; the piston is fixedly connected with a tongue part, the center rod can be inserted into the liquid outlet hole, and the piston assembly is provided with an initial station and a flaking station. According to the smear device for detecting the cerebrospinal fluid, the manufacturing process of a cell smear is simplified, operation is convenient and fast, the smear manufacturing efficiency is remarkably improved, the smear manufacturing time is shortened, unnecessary physical damage to cells in the smear manufacturing process is avoided, then cell rupture and dissolution can be effectively reduced, and the smear quality is remarkably improved; meanwhile, the comprehensive cost of manufacturing the cell smear is obviously reduced.

The utility model discloses a kind of metal intelligent chip card packaging structures, including card base and chip module connected on card base, the card base at least includes upper structural layer, antenna layer and lower structural layer which are thin sheet and are sequentially laminated, the antenna layer is equipped with radio frequency antenna, the radio frequency antenna has at least two conductive contact parts, the card base is equipped with the mounting groove for accommodating chip module in the upper of conductive contact part, the mounting groove groove bottom is equipped with the conductive connection groove extending to conductive contact part downwards, the chip module bottom has the chip contact exposed after packaging, the conductive connection groove is equipped with the conductive material column in the lower part and conductive contact part conductive connection, upper part protrudes upwards and is connected with chip contact conductive connection, the utility model aims at overcoming the deficiency of prior art, provide a kind of metal intelligent chip card packaging structure with compact structure, strong stability.

The utility model provides a kind of functional film, belong to functional film technical field.The utility model's functional film includes base material layer and the closed cavity inlay in the base material layer.The utility model's functional film only includes a layer of base material layer, more light and thin, optical absorption is lower, heat transfer performance is better;And relative to laminated structure, there is no interface mismatch risk, low in cost, there is no laminated interface, avoid delamination caused by moisture penetration under high temperature and high humidity environment, higher environmental aging resistance, and need not laminating.The utility model's functional film in solar cell field, can improve the structural stability of heat dissipation and packaging, improve the power generation efficiency of solar module, long-term working life and environmental tolerance, in display field, its light and thin, flexible and non-heterogeneous characteristics make it have good application space in precision optical device.

A vacuum valve of an integrated die-casting die comprises the die-casting die, a vacuum valve body, an oil cylinder and an exhaust pipe, the vacuum valve body and the oil cylinder are installed in a vacuum valve installation cavity and an oil cylinder installation cavity which are formed in the die-casting die respectively, a valve element arranged in an inner cavity of the vacuum valve body is connected with the oil cylinder, and the inner cavity of the vacuum valve body extends out of the die-casting die through the exhaust pipe. An inner cavity of the vacuum valve comprises a guide section, an air exhaust section and a sealing section, a sealing sleeve is arranged in the guide section, a mounting hole is formed in one side of the air exhaust section, an air exhaust pipe is mounted in the mounting hole and communicated with the air exhaust section, the sealing section is a stepped hole, the diameter of a small-diameter section is the same as that of the air exhaust section, and a middle-diameter section is a straight surface section. The small-diameter section is communicated with the cavity and used for forming straight face sealing with the straight face of the valve element end, the large-diameter section is communicated with the cavity, a first inclined face is arranged between the small-diameter section and the medium-diameter section and used for forming inclined face sealing with the inclined face of the valve element end, and a guide inclined face is arranged between the medium-diameter section and the large-diameter section.

The invention provides an energy storage cabin manufacturing method, and relates to the technical field of new energy storage equipment manufacturing. The welding holes are punched in the positions, corresponding to the reinforcing ribs and the bottom frame side bottom beams, of the end door inner sealing plate and the bottom frame outer bottom plate respectively, in the actual welding machining process, only the inner sealing plate and the bottom frame bottom plate need to be positioned and assembled according to the drawing requirement, the welding holes are subjected to spot welding, and then connection and fixation with internal workpieces can be achieved; and meanwhile, the design requirements for sealing performance, structural strength and attractive appearance of the energy storage cabin are met, the manufacturing process of such parts of the energy storage cabin is simplified, the method is convenient, the production efficiency is improved, redundant internal workpieces do not need to be welded, the machining cost is reduced, and resource waste is reduced.

This invention discloses a battery module with a thermally conductive pad, its preparation method, and a method for removing excess adhesive. It belongs to the industrial field of battery module products with buffer pads and thermally conductive structural adhesive. The module includes a battery module, a liquid cooling plate, and a thermally conductive pad. The thermally conductive pad is mounted on the liquid cooling plate, and the battery module is mounted on the thermally conductive pad. The thermally conductive pad connects the bottom surface of the battery module to the liquid cooling plate as a single unit. Liquid cooling pipes connect the liquid cooling plates at the bottoms of adjacent battery modules. The thermally conductive pad contains a porous foam pad and a thermally conductive structural adhesive, with the adhesive filling the pores of the porous foam pad. This invention solves the problems of high cost of existing thermally conductive pads and the tendency for excess adhesive and uneven application using ordinary adhesive application methods. This thermally conductive pad optimizes and improves the thermal management of the bottom surface of the battery module compared to existing thermally conductive pads, while also offering advantages such as low cost, good thermal conductivity, reduced excess adhesive, and uniform adhesive application.

This disclosure relates to a method, apparatus, electronic device, and computer program product for generating two-dimensional animation, belonging to the field of animation production technology. The method includes: determining target art material, the target art material including a target object; obtaining a motion path set for the target object, wherein the motion path is used to represent the motion trajectory of the target object in the two-dimensional animation to be generated; determining multiple control points set for the target object and binding the control points to the motion path; and controlling the control points to move along the motion path based on motion parameters set for the target object, to generate a two-dimensional motion animation of the target object along the motion path. This disclosure provides an efficient, accurate, and easy-to-operate animation generation scheme through automated control point binding and motion control, greatly simplifying the animation production process and applicable to complex deformation scenes.

This utility model relates to the field of airbag technology, and more particularly to a side airbag assembly, mounting structure, and vehicle. It includes a gas generator, an airbag, a buckle, and a cable tie. The gas generator is located inside the airbag, with a wiring harness connection end at one end. The wiring harness connection end penetrates the side wall of the airbag and extends to the outside of the airbag. One end of the buckle is a hook end, and the other end is an installation end. The hook end is located outside the airbag, and the installation end penetrates the side wall of the airbag and extends into the interior of the airbag, and is securely connected to the gas generator by the cable tie. This utility model achieves quick engagement of the side airbag with the mounting holes of the car seat back through the buckle structure, eliminating the need for nuts or other fasteners, thus improving assembly convenience and efficiency. Simultaneously, the buckle is directly securely connected to the gas generator via the cable tie, eliminating the traditional welding stud process, simplifying the manufacturing process of the airbag assembly, and reducing manufacturing difficulty.

This invention belongs to the field of multi-beam antenna arrays and discloses a filtered multi-beam array and method based on a four-channel filter jumper. By integrating a microstrip-to-substrate integrated waveguide structure, a filter Butler matrix containing a four-channel filter jumper, and an antenna array on a first metal layer, a filtered multi-beam array based on a multi-layer planar structure is constructed. The four-channel filter jumper utilizes multiple resonant cavities and coupling structures, and by precisely controlling the coupling phase between the resonant cavities, a preset phase shift is directly introduced while achieving the filtering response, thus integrating filtering and phase-shifting functions into a single device. This design avoids the complex structure of filter couplers and the additional losses of filter phase shifters in traditional integrated schemes, significantly simplifying the device architecture, reducing transmission loss, improving system integration and beamforming accuracy, and effectively meeting the urgent needs of 5G and future 6G communication systems for high performance, low loss, and high integration.

The utility model provides a kind of wafer temperature uniform control and automatic transfer integrated device in hot plate air extraction process, including disc-shaped cavity main body and automatic wafer transfer assembly, cavity main body top is plane structure, hot plate upper surface is perpendicular to the central axis of cavity main body, the sealing disc is coaxially arranged with cavity main body;It further includes air inlet and air outlet, air inlet is circularly opened in the sidewall top of the cavity main body;Air outlet is opened in the top surface center of the cavity main body.The utility model determines suitable cavity wall surface material by optimizing cavity structure, reasonably selecting air inlet and air outlet position, solves the problem of wafer temperature uneven in prior art, and realizes wafer automatic taking through intelligent automatic wafer transfer assembly structure under the form of not changing cavity structure, improves the quality and efficiency of semiconductor wafer manufacturing.

This invention relates to the field of fiber structural component preparation technology, specifically to a method and equipment for integrated extrusion molding of high-performance nanofiber structural components. The integrated extrusion molding method for high-performance nanofiber structural components of this invention includes the following steps: (1) adding a nanofiber solution to a forced mixing and conveying device, causing the nanofiber solution to be sheared and transformed into a homogenized dispersion in the forced mixing and conveying device, and then injecting the homogenized dispersion into a molding die through an extrusion die under the extrusion pressure provided by the forced mixing and conveying device; (2) immersing the entire molding die in a reconstruction solution, allowing the homogenized dispersion injected into the molding die to exchange solvents with the reconstruction solution, causing the homogenized dispersion to undergo a sol-gel conversion, forming a nanofiber composite gel with a predetermined shape; (3) washing and drying the nanofiber composite gel with the predetermined shape to obtain a nanofiber structural component. This method has fewer steps and less environmental impact.

This utility model discloses a lightweight, energy-saving molded cable tray, relating to the field of cable tray technology. It includes a cable tray body comprising a base plate and two side plates. Multiple first reinforcing components are evenly spaced on the base plate, each first reinforcing component including a first rectangular protrusion. This utility model features a rationally designed structure. By setting rectangular protrusions with weight-reducing grooves on the base plate and side plates, and using a stamping process to form the first and second weight-reducing grooves, the weight of the cable tray is significantly reduced, meeting lightweight requirements. The first and second support rods fixed within the weight-reducing grooves act like an internal "invisible skeleton," providing strong support for the cable tray. Combined with the molded reinforcing grooves, the structural strength is enhanced both laterally and longitudinally, enabling the cable tray to maintain reliable load-bearing capacity and deformation resistance while remaining lightweight. This solves the contradiction between lightweight and high strength inherent in traditional cable trays.

This invention belongs to the field of third-generation semiconductor material processing technology. It discloses a method and system for laser-based lift-off of curved silicon carbide. This invention establishes a target curved surface model and generates a corresponding three-dimensional processing path. During laser scanning, the beam wavefront is modulated in real time, and the lateral position and depth of the focus point within the material are simultaneously controlled. Optical aberrations caused by the material's high refractive index are compensated for. The entire process requires no mechanical movement of the focusing axis, forming a continuous and precise three-dimensional modification layer within the ingot. Finally, external force is applied along this modification layer to achieve low-damage, high-efficiency curved surface lift-off. This invention overcomes the limitation of traditional laser lift-off, which can only obtain planar wafers. It can directly construct any preset three-dimensional curved surface separation path within a silicon carbide ingot with a flat surface, thereby lifting out silicon carbide wafers with specific curvatures such as convex, concave, or free-form surfaces in a single operation.

The present application provides an antenna device with touch function, in particular a chip antenna, comprising a dielectric substrate, a first conductive layer, a second conductive layer and a touch conductive layer. The first conductive layer is disposed inside the dielectric substrate, and the second conductive layer is disposed inside or at the bottom of the dielectric substrate. The first conductive layer and the second conductive layer partially overlap and form an overlapping area. The first conductive layer is connected to a signal feed end, and the second conductive layer is connected to a ground end. The touch conductive layer is disposed inside or at the top of the dielectric substrate and connected to a touch signal transmission end. Through the arrangement of the touch conductive layer, the function of the antenna device can be increased, so that the antenna device can be used to sense touch signals.

The utility model discloses a bidirectional transmission LED support, which relates to the technical field of LED supports and comprises a circuit layer and a covering layer which are positioned and laminated. Metal bonding pads are distributed on the two faces of the circuit layer, metalized through holes are formed in the circuit layer, and the metal bonding pads on the two faces can be connected through the metalized through holes, so that use of copper foil of a PCB in electronic assembly is reduced, the material cost is reduced, the manufacturing process of the support is simplified, the machining difficulty is reduced, and the production efficiency is improved. Therefore, the overall manufacturing cost is effectively controlled, the function of data transmission at any end in the transmission direction of the display screen is achieved, breakpoint continuous transmission is supported, and the flexibility and reliability of data transmission are improved.

The invention relates to the technical field of expanded ammonium nitrate explosives, in particular to a preparation method of a high-free-flowing liquid-mixed expanded ammonium nitrate explosive, which comprises the following steps: adding porous granular ammonium nitrate accounting for 15-25% of the weight of a liquid-mixed ammonium nitrate base material into the liquid-mixed ammonium nitrate base material prepared after expanded crystallization; the preparation method of the porous granular ammonium nitrate comprises the following steps: preparing rice husk charcoal from rice husks in an inert atmosphere, dispersing the rice husk charcoal in ethanol, adding tetraethoxysilane, adjusting the pH value, and filtering, washing and drying after the reaction is completed to obtain a charcoal-silicon composite carrier; adding a nonionic surfactant and a silane coupling agent to pre-treat the ammonium nitrate feed liquid; adding a carbon-silicon composite carrier into the pretreated ammonium nitrate feed liquid, preserving heat, and uniformly stirring to obtain premixed liquid; and finally, carrying out spray drying to obtain the porous granular ammonium nitrate. The prepared expanded ammonium nitrate explosive has good free-running property and moisture absorption resistance, and is safe and reliable in explosion performance.

A three-dimensional memory device includes a substrate and a memory stack structure disposed on the substrate. The memory stack structure includes a plurality of groups of conductive-dielectric layer pairs. The memory stack structure has a first region and a second region. The conductive-dielectric layer pairs in an upper half of the first region are stacked in a staircase shape with a lower half having first sidewalls that are cut flush with each other. The conductive-dielectric layer pairs in an upper half of the second region have second sidewalls that are cut flush with each other with a lower half stacked in a staircase shape. In this way, the three-dimensional memory device can form the memory stack structure through a simplified fabrication process and avoid problems such as collapse or structural defects for memory stack structures having a high aspect ratio.

This invention discloses a power amplifier and electronic device employing a thin-gate device. The power amplifier uses a fully thin-gate low-threshold voltage transistor architecture, amplifying signals through multiple parallel cascode amplification units. The gate of the input stage transistor is coupled to the input signal via a DC-blocking capacitor, and the drain of the cascode transistor is connected to the power supply via an inductor. By introducing a segmented complementary gain control strategy—selectively turning off the input stage transistor while keeping the cascode transistor on in the high-power output range, and selectively turning off the cascode transistor while keeping the input stage transistor on in the low-power output range—this invention overcomes the performance limitations of traditional hybrid gate oxide schemes, significantly reducing parasitic capacitance and dynamic power consumption, and improving conversion efficiency. It simultaneously resolves the contradiction between the withstand voltage safety and deep turn-off of thin-gate devices, ensuring reliability across the entire power range; and simplifies the manufacturing process and optimizes current efficiency.

This invention relates to a bamboo-like silica / polyimide core-shell nanofiber aerogel and its preparation method. The aerogel uses bamboo-like silica as the core and polyimide as the shell. Core-shell nanofibers are obtained through coaxial electrospinning, followed by gelation, freeze-drying, and thermal imidization to form a three-dimensional porous network structure with interwoven support and cross-linking. The bamboo-like silica acts as a supporting and reinforcing skeleton within the fibers, improving the aerogel's compression resilience and structural stability, while also enhancing its flame-retardant and thermal insulation properties. The preparation method includes the preparation of a polyamic acid precursor solution, acidic hydrolysis of the silica precursor solution, coaxial electrospinning to form core-shell fibers, pre-imidization, and subsequent thermal imidization steps. The resulting aerogel exhibits low density, high porosity, low thermal conductivity, and excellent thermal stability, making it suitable for applications in thermal insulation, flame retardant protection, and lightweight structural materials.

The application provides an anode carbon block for an aluminum electrolytic cell, which comprises an anode carbon block body, a steel claw assembly and an anode guide rod; the anode carbon block body is square as a whole and is provided with a protrusion at the upper portion; the steel claw assembly comprises a plurality of steel claws which are arranged in parallel and are connected perpendicularly to the anode guide rod; a carbon bowl corresponding to the number of the steel claws is formed in the protrusion; the lower end of each steel claw is provided with a plug-in part and is plugged into each carbon bowl respectively; a circular limiting step protruding upward is arranged at the middle position of the inner bottom wall of the carbon bowl; a clamping groove is formed in the middle position of the lower end surface of the plug-in part of the steel claw; the lower end of the plug-in part of the steel claw has a step surface; a first carbon ring which is in contact with the step surface is sleeved on the outside of the lower end of the plug-in part; and the outer ring surface of the first carbon ring and the inner side wall of the carbon bowl are bonded by carbon cement. The anode carbon block of the application can keep a good plug-in posture and a good conductive contact state of the steel claw during operation by the combined cooperation of plug-in limiting, cementing buffering and multi-point constraint, and is more stable and reliable in use.

The application discloses a ceramic powder forming machine and method for preparing a ceramic powder with a columnar skeleton structure, and mainly improves the shear strength of a layered ceramic material and solves the problems of multiple processes and low efficiency existing in a method for constructing a layered ceramic structure. In the layered ceramic, a columnar skeleton is constructed, the skeleton can not only prevent the layered structure from cracking, but also share the force and impact received by the layered material, and the shear strength of the layered ceramic material is improved. Meanwhile, a device required for preparing the structure is designed, the device is mainly composed of a workbench and a mold, the skeleton powder is pushed into by cooperation of upper and lower pressing heads, collapse of the matrix powder can be avoided, the integrity of the structure is ensured, the device can be replaced with accessories according to a design scheme, different design structures can be adapted, the preparation process is simple, and the preparation efficiency can be improved.

The utility model relates to a fire and meteor monitoring camera assembly, which comprises a fire and meteor monitoring camera, a shell, an air suction fan, a temperature sensor and a controller, the shell comprises a light-transmitting cover and a shell body, and the light-transmitting cover covers the top of the shell body. The shell body comprises a bottom wall, a side wall and a partition plate; the bottom of the side wall is connected with the periphery of the bottom wall, and a waterproof structure is arranged between the top of the side wall and the light-transmitting cover. The periphery of the partition plate is connected with the inner surface of the side wall, and the partition plate is provided with a camera assembling hole and a plurality of ventilation holes; and the fire star monitoring camera passes through the camera assembly hole and is fixed on the partition plate. An air inlet hole and an air outlet hole are formed in the bottom wall, and a fan positioning seat extending upwards is further arranged on the bottom wall beside the air inlet hole. The air suction fan is located below the partition plate and fixed to the fan positioning base. The signal output end of the temperature sensor is connected with the input end of the controller, and the control output end of the controller is connected with the control end of the air suction fan. According to the utility model, good heat radiation is ensured, and the waterproof performance is reliable.

The present application relates to the technical field of certificate card manufacturing, and specifically provides a certificate card manufacturing system, comprising a pre-positioning device, a storage device, a feeding device, a pressing device and a punching device, wherein the pressing device comprises a hot pressing unit arranged on a hot pressing station, a cold pressing unit arranged on a cold pressing station, and a feeding device for feeding a material plate between the feeding device, the hot pressing unit, the cold pressing unit and the punching device; a plurality of raw material layers are stacked and positioned by the pre-positioning device to form a raw material plate; the raw material plate is preliminarily positioned by the storage device; the raw material plate is pressed together by the pressing device to form a pressed plate; and then the pressed plate is punched by the punching device to form a finished card with independent information. The manufacturing procedure and process are relatively simple, automatic and intelligent operation can be realized, and the manufacturing efficiency of the finished card is improved.

This utility model discloses a power module heat dissipation module and an automotive power supply, relating to the field of automotive power supplies. The power module heat dissipation module includes a mounting assembly and multiple heat-generating devices. The mounting assembly includes a first circuit board and a second circuit board arranged opposite each other and spaced apart. The side of the first circuit board facing the second circuit board is a first mounting surface, and the side of the second circuit board facing away from the first mounting surface is a second mounting surface. The first end face of each heat-generating device is connected to either the first or second mounting surface, and the second end face of each heat-generating device is flush with the same plane. This utility model aims to simplify the water channel structure and reduce the risk of leakage.

This invention belongs to the field of optoelectronic device technology, specifically relating to a row-and-column visible-near-infrared image sensor based on a graphene / silicon array and its fabrication process. The detector comprises silicon on an insulating layer, graphene, silicon dioxide, and electrodes. This detector achieves detection in the visible to near-infrared band by constructing a graphene / silicon Schottky junction. Through array structure design, row and column readouts are achieved via circuitry between the electrodes and graphene. This invention helps to overcome the technical bottlenecks of two-dimensional materials in wide-band, high-sensitivity image sensing.

The present application relates to the technical field of functional thin film material preparation; in particular, it relates to a friction power generation flexible cilium film and a preparation method thereof. The preparation method comprises the following steps: adhering a high-temperature adhesive tape to one side of a hole plate to prepare a cilium template; mixing metal particles with an organic solution to prepare a homogeneous mixed solution; coating the homogeneous mixed solution on the side of the cilium template without the high-temperature adhesive tape, performing vacuum perfusion and heating solidification, and then taking off the flexible cilium film; laying the taken-off flexible cilium film flat, spraying a polytetrafluoroethylene solution on the cilium array surface of the flexible cilium film, and drying to obtain the flexible cilium film. The friction power generation flexible cilium film provided by the present application is a bendable flexible polymer film, the cilium film has the characteristics of high flexibility, high elasticity and low cost, and can coordinate and take into account the friction power generation performance and durability of the material, and has a good application prospect in the field of friction power generation.

This invention provides a negative electrode sheet, its preparation method, and a battery. The negative electrode sheet comprises a carbon cloth substrate, a silicon-based composite layer, and a carbon coating layer. A porous structure is formed on the surface of the carbon cloth substrate. The silicon-based composite layer includes silicon particles and titanium silicide. The silicon particles are grown in situ within the porous structure to form a silicon array. Titanium silicide is dispersed on the side of the silicon array facing away from the carbon cloth substrate to form a titanium silicide layer. The carbon coating layer covers the side of the silicon-based composite layer facing away from the carbon cloth substrate. This invention, through a four-tiered structural design of "porous substrate - in-situ silicon array - titanium silicide interface layer - carbon coating," successfully solves industry challenges related to interface bonding, conductivity, process complexity, and cycle stability in binderless silicon-based negative electrodes, providing key technical support for the practical application of high-energy-density lithium-ion batteries.

The utility model belongs to the technical field of tooth flushing equipment, and particularly relates to a water outlet pipe of a water toothpick and tooth flushing equipment, the water outlet pipe of the water toothpick comprises a water pipe main body and a micro bubble generating structure, the water pipe main body is internally provided with a bubble generating section water path and a flow stabilizing section water path in sequence; the micro-bubble generating structure comprises a porous foaming core part and an expanded foaming core part; the porous foaming core piece is arranged at the water inlet end of the bubble generation section water path; the expansion foaming core piece is arranged at the water outlet end of the bubble generation section water path; the steady flow section water path is arranged on the water outlet side of the expansion foaming core piece; according to the utility model, the flow velocity is increased through the porous foaming core piece, the gas-liquid mixing efficiency is enhanced so as to generate bubbles, and the bubbles are promoted to be broken and uniformly distributed through the expansion foaming core piece; therefore, the water outlet pipe of the water toothpick and the tooth washing equipment are compact in structure and more simplified in design, and are suitable for daily easy use of families and portable requirements of travel work.

This invention provides a two-dimensional MOF / MXene heterojunction, its preparation method, and its applications, relating to the fields of nanomaterial preparation and sensing technology. The method involves transferring large-size two-dimensional MXene nanosheets to a substrate and fixing them on a rotating platform. Under rotation and illumination, a metal salt solution and an organic ligand solution are sequentially added to the MXene surface through a layer-by-layer assembly process. Centrifugal force is used to spread the solution and remove excess liquid. After cyclic reaction, a MOF layer is grown in situ on the MXene surface, forming a MOF / MXene heterojunction. This invention also provides the two-dimensional MOF / MXene heterojunction obtained by the above preparation method. Furthermore, this invention provides the application of the two-dimensional MOF / MXene heterojunction prepared by the above method in the field of sensing and detection. The sensor constructed based on this invention exhibits high sensitivity, low detection limit, and good stability, making it suitable for high-precision sensing and detection.