1705 results about "Electrode Contact" patented technology

The invention relates to a micro-display device based on multilayer stacking and a preparation method thereof, the micro-display device comprises a driving backboard and a plurality of pixel layers, and the driving backboard is provided with a first type of electrode contacts; the multiple pixel layers are sequentially stacked in the Z direction, sub-pixels are arranged in each pixel layer, the bottom end of each sub-pixel is electrically connected to the corresponding first type of electrode contact, and the top end of each sub-pixel is electrically connected to the corresponding first conductive layer; in two adjacent pixel layers in the multiple pixel layers, the first conductive layer of one sub-pixel in the upper pixel layer is in direct contact with the first conductive layer of one sub-pixel in the lower adjacent pixel layer. The invention also discloses a preparation method of the micro display device. According to the invention, the processing technology and the cathode interconnection structure are simplified; and meanwhile, the current conduction capability is enhanced, the power consumption of the device is reduced, and the reliability and stability of the display device are improved.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof, the display device comprises a driving backboard and a mother pixel, the mother pixel comprises a plurality of sub-pixels, one of a first type of electrode contact and a second type of electrode contact on the driving backboard is a common-pole contact, and the other one is a non-common-pole contact; the electric connectors comprise common-pole conductive parts and non-common-pole conductive parts, the non-common-pole conductive parts are configured to be electrically connected to the first ends of the corresponding sub-pixels and electrically connected with the corresponding non-common-pole contacts, and the common-pole conductive parts are configured to be electrically connected to the second ends of the sub-pixels and electrically connected with the common-pole contacts to form a common-pole structure; each of the copolar conductive part and the non-copolar conductive part comprises an interconnection conductive part, the interconnection conductive parts are located in the corresponding pixel layers, at least one interconnection conductive part comprises a core body, the core body is a compound semiconductor, and the core body is located in the first inner fence. The invention further discloses a preparation method. The production efficiency and quality of the LED display device can be improved.

According to one embodiment, a method of manufacturing a display device includes forming a lower electrode, forming an insulating layer covering the lower electrode, forming a partition including a lower portion on the insulating layer and an upper portion protruding from a side surface of the lower portion, forming, after the forming of the partition, a pixel aperture in the insulating layer, forming an organic layer in contact with the lower electrode via the aperture, forming an upper electrode which covering the organic layer and patterning the organic layer and the upper electrode to form a display element.

The invention belongs to the technical field of medical instruments, and particularly relates to a spinal epidural ventral side double-wing-shaped stimulation electrode and motion function reconstruction system, the spinal epidural ventral side double-wing-shaped stimulation electrode and motion function reconstruction system comprises two wing panels, each wing panel comprises a flexible substrate, the flexible substrate is provided with two bifurcated preset-curvature double-wing structures; the electrode contact array is integrated on the flexible polar plate through a bonding pad; according to the double-wing-shaped flexible substrate, through a double-wing structure with a preset curvature, after being unfolded under the driving of a nickel-titanium alloy framework, the double-wing-shaped flexible substrate accurately covers a spinal cord ventral side and double-side anterior angle motor neuron pool, and the problem that a traditional single-piece / rod-shaped electrode can only cover a back side sensing area and cannot cover a back side sensing area is solved. The ventral motor neuron group cannot be directly activated; a stimulation target spot is transferred to a ventral functional core area from a dorsal non-target area for the first time, and the anatomical suitability bottleneck of motor function reconstruction is solved.

The utility model discloses a tumor electric field treatment device and a treatment system, the tumor electric field treatment device is provided with a frame body and a pole piece module, the frame body forms a skeleton structure of the treatment device, the pole piece module is attached to the frame body, the pole piece module is provided with a plurality of electrode contacts, and each electrode contact can form an active contact or a passive contact. The active contact and the radio frequency generation module can form a loop; after the treatment device is implanted into a tumor excision part, all the electrode contacts form active contacts, and all the electrode contacts and the radio frequency generation module form a loop to distinguish normal tissues from pathological tissues; after the normal tissue and the lesion tissue are distinguished, the electrode contacts in the normal tissue area form passive contacts, and the electrode contacts in the lesion tissue area form active contacts, so that targeted treatment of the lesion tissue is realized, and side effects generated by electric field treatment are reduced.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof. The display device comprises a driving backboard and a mother pixel, the mother pixel comprises a plurality of sub-pixels, one of a first type of electrode contact and a second type of electrode contact on the driving backboard is a common-pole contact, and the other one of the first type of electrode contact and the second type of electrode contact on the driving backboard is a non-common-pole contact; the non-common-pole conductive pieces are configured to be electrically connected to the first ends of the corresponding sub-pixels and electrically connected with the corresponding non-common-pole contacts, and the common-pole conductive pieces are configured to be electrically connected to the second ends of the sub-pixels and electrically connected with the common-pole contacts to form a common-pole structure; each of the copolar conductive part and the non-copolar conductive part comprises at least one interconnection conductive part, a compound semiconductor region is arranged in the pixel layer where the interconnection conductive part is located, a backfill hole is formed in the compound semiconductor region, and the backfill hole is filled with the interconnection conductive part. The invention further discloses a preparation method. The stability and reliability of the LED display device can be improved, and the LED display device is more convenient to process.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof, the display device is provided with a driving back plate and a mother pixel, the mother pixel comprises a plurality of sub-pixels, the driving back plate comprises a first type of electrode contacts and a second type of electrode contacts, and electric connecting pieces comprise copolar conductive pieces and non-copolar conductive pieces. Each non-copolar conductive piece corresponds to a different sub-pixel; one of the first type of electrode contacts and the second type of electrode contacts is a common-pole contact, and the other one is a non-common-pole contact; the driving backboard comprises a plurality of non-common-pole contacts, the plurality of non-common-pole contacts are divided into at least two ring groups, and each ring group corresponds to different sub-pixels; the non-co-polar conductive members are configured to be electrically connected to the non-co-polar contacts in the ring groups of the respective corresponding sub-pixels, and the co-polar conductive members are configured to be electrically connected to the co-polar contacts to form a co-polar structure. The invention further discloses a preparation method. According to the invention, the problem of overhigh local current density in the display device is effectively improved, and the reliability and stability of the device are effectively improved.

The invention relates to a micro-display device which comprises a driving backboard and a plurality of pixel layers, and a mother pixel comprises a plurality of sub-pixels; the top end of each sub-pixel is electrically connected to the corresponding second type of electrode contact through a top conductive layer, and the bottom ends of the plurality of sub-pixels are interconnected through a bottom conductive layer and then electrically connected to the corresponding first type of electrode contact to form a bottom copolar structure; wherein the axes of all the sub-pixels in the mother pixel do not coincide; in the two sub-pixels of different pixel layers, the bottom conducting layers of the two sub-pixels are connected through a common-pole conducting piece, one side of one sub-pixel in the lower pixel layer is provided with at least one non-light-emitting unit to jointly form a unit body, and the common-pole conducting piece penetrates through one non-light-emitting unit in the unit body. The light efficiency and reliability of the micro display device can be improved.

The invention relates to an LED display device based on vertical stacking and a preparation method thereof. The display device comprises a driving backboard and a mother pixel, the mother pixel comprises a plurality of sub-pixels, the driving backboard is provided with a first type of electrode contacts and a second type of electrode contacts, electric connecting pieces comprise copolar conductive pieces and non-copolar conductive pieces, and the non-copolar conductive pieces correspond to different sub-pixels respectively; the first type of electrode contacts are non-common-pole contacts, and the second type of electrode contacts are common-pole contacts; the non-common-pole conductive parts are configured to be electrically connected to the first ends of the corresponding sub-pixels and electrically connected with the non-common-pole contacts corresponding to the sub-pixels, and the common-pole conductive parts are configured to be electrically connected to the second ends of the sub-pixels and electrically connected with the common-pole contacts to form a common-pole structure; an annular reflecting layer surrounds the periphery of at least one sub-pixel, and a first insulating layer is further arranged between the side wall of the sub-pixel and the peripheral annular reflecting layer. The invention further discloses a preparation method. The light-emitting effect of the LED display device is improved.

The invention relates to an LED display device and a preparation method, the LED display device comprises a substrate and a pixel layer, the pixel layer comprises pixel units, the periphery of each pixel unit is at least surrounded by an annular partition groove, each pixel unit is at least partially overlapped with the outermost annular partition groove of the adjacent pixel unit, and the outermost annular partition groove of each pixel unit is at least partially overlapped with the outermost annular partition groove of the adjacent pixel unit. A compound semiconductor is reserved in the non-overlapping area, or a compound semiconductor is reserved between each pixel unit and the outermost annular partition groove of the adjacent pixel unit, so that the pixel units and the adjacent pixel units are completely separated from each other; the top of each pixel unit is electrically connected with the corresponding second-type electrode contact, the bottom of each pixel unit is electrically connected with the corresponding first-type electrode contact, and the second-type electrode contacts are formed on the periphery of the outermost annular partition groove of the corresponding pixel unit. The invention further discloses a preparation method of the LED display device. The heat dissipation capacity of the LED device can be effectively improved, the LED device can emit light stably, and the photoelectric performance and the reliability of the LED display device are guaranteed.

The invention discloses an electrochemical pressure sensor based on polyelectrolyte gel and a preparation method thereof, and belongs to the technical field of pressure-sensitive elements and pressure sensors. The electrochemical pressure sensor comprises a polyelectrolyte gel pressure sensitive layer, a positive electrode and a negative electrode, wherein the surface of the polyelectrolyte gel pressure sensitive layer is provided with a bowl-shaped groove array structure; the positive electrode is positioned on the upper surface of the pressure sensitive layer; the negative electrode is positioned on the lower surface of the pressure sensitive layer; the polyelectrolyte gel pressure sensitive layer comprises PVA, LiCl and PSS. The surface bowl-shaped groove array structure prepared by using the nucleation effect has excellent pressure-sensitive performance: on one hand, the sensitivity of contact between polyelectrolyte gel and an electrode to pressure is improved, so that the sensor realizes excellent pressure response characteristic; and on the other hand, the surface microstructure gel electrolyte preparation method with less damage to the mold and wider applicability is realized. The electrochemical pressure sensor provided by the invention has the characteristics of high response rate and high output power, and has important value for development of high-performance self-energized pressure sensors.

A back contact solar cell, a preparation method and a battery assembly, which belong to the technical field of crystalline silicon solar cells. The back contact solar cell comprises: a semiconductor substrate, the back surface of which includes first polarity regions and second polarity regions alternately arranged in a first direction; a first functional layer, which is disposed in the first polarity regions; a second functional layer, which is disposed in the second polarity regions; a laser protection layer, which is disposed on the side of the second functional layer away from the semiconductor substrate and exposes electrode contact regions of the second functional layer, wherein the material of the laser protection layer includes laser absorption material; first electrode structures, which are disposed on the side of the first functional layer away from the semiconductor substrate; and second electrode structures, which are disposed on the side of the second functional layer away from the semiconductor substrate and located in the electrode contact regions.

The invention relates to an electrical impedance detection method and device, an electronic device and a storage medium, which are applied to the field of electrical impedance imaging, and the electrical impedance detection method comprises the following steps: obtaining an electrode signal of a target electrode in a measurement area; a plurality of preset electrodes are attached to the measurement area; the target electrode comprises any one of a plurality of preset electrodes; the electrode signal carries excitation electrode data and measurement electrode data generated by the target electrode; determining a fluctuation value of the target electrode according to the excitation electrode data and the measurement electrode data; when the fluctuation value is within a preset fluctuation threshold range, based on a preset electrode measurement method, electrode contact impedance of the measurement area is obtained; and generating an electrode adjustment result based on the electrode contact impedance and sending the electrode adjustment result to the client. According to the method and the device, the problem that the efficiency of electrical impedance measurement is relatively low due to the fact that whether the electrode falls off or is in poor contact cannot be quickly judged during bioelectrical impedance imaging is solved.

The present invention discloses a multifunctional and convenient reaction chamber for an electrically triggered Joule heating device and an operating method thereof, wherein the reaction chamber comprises a sealing cover and a base that are buckled together, wherein a first conductive fixing clamp and a second conductive fixing clamp are provided in parallel on the inner bottom plate of the base, wherein a sample fixing clamp is clamped and fixed between the first conductive fixing clamp and the second conductive fixing clamp, wherein electrodes are respectively mounted on both ends of a clamping plate on one side of the sample fixing clamp, and the electrodes at both ends are respectively in contact with and cooperate with the corresponding side clamps of the first conductive fixing clamp and the second conductive fixing clamp, wherein the sample is arranged between the clamping plates that are opposite to each other and the two ends of the sample are respectively in contact with and cooperate with the electrodes, and a cooling system is respectively provided on both sides of the sample fixing clamp. The present invention also discloses an operating method for a multifunctional and convenient reaction chamber for an electrically triggered Joule heating device. The present invention can achieve a higher precursor loading amount and a faster cooling speed, and can also meet the requirements of preparing a sample vacuum environment and a variety of reaction atmospheres.

The embodiment of the invention discloses an electrical stimulation parameter determination method, device and equipment, a medium and a medical system. The method comprises the following steps: acquiring a brain three-dimensional model corresponding to a target user of which the brain is implanted with at least one stimulation electrode; determining at least one electrode contact combination corresponding to the target nucleus simulation model according to the first spatial position information of the target nucleus simulation model and the second spatial position information of the electrode simulation model; determining at least one group of candidate electrical stimulation parameters of the electrode contact combination according to the electrode contact combination and a target nucleus simulation model; determining the total power consumption of the stimulator of the candidate electrical stimulation parameters according to a preset total power consumption quantitative model of the stimulator and the candidate electrical stimulation parameters; and determining at least one group of target recommended electrical stimulation parameters from the plurality of groups of candidate electrical stimulation parameters according to the total power consumption of the plurality of stimulators. According to the technical scheme, the effect of accurately screening the recommended electrical stimulation parameters with low energy consumption and efficient stimulation effect according to the electrical stimulation power consumption is achieved.

The invention discloses an electric spark nondestructive testing evaluation method for the integrity of a waterproof layer of a cable trench, and belongs to the technical field of nondestructive testing, and the method comprises the following steps: applying a multi-frequency electric signal through a preset moving electrode; the initial contact pressure of the moving electrode and the surface of the waterproof layer is obtained in real time, the pressure of the contact position of the moving electrode is adjusted, an electric spark signal generated at the defect position of the cable trench waterproof layer by a multi-frequency electric signal applied by the moving electrode is captured, and characteristic parameters of the electric spark signal are extracted to generate current electric spark characteristic data; utilizing the current electric spark characteristic data to distinguish defect types so as to generate a defect evaluation result; and outputting defect distribution information and triggering an acousto-optic alarm according to a defect evaluation result. According to the method, a detection mode of combining multi-frequency electric signal excitation and electric spark signal feature extraction and analysis is adopted, waterproof layer defect types can be distinguished, the severity of the waterproof layer defects can be evaluated, and the detection accuracy is improved.

A display device includes a substrate including a display area in which pixels are located, and a non-display area, first and second electrodes in the display area and spaced from each other, light emitting elements between the first and second electrodes, connection electrodes electrically connected to the light emitting elements, a fan-out line electrically connected to the pixels in the non-display area, a first pad electrode on the fan-out line, a pad connection electrode on the fan-out line and the first pad electrode, and electrically connecting the fan-out line and the first pad electrode, and a second pad electrode at a same layer as at least one of the connection electrodes, and contacting the first pad electrode.

A probe holder holds contact probes each coming in contact with an electrode of a contact target on one end side of the contact probe in a longitudinal direction, and includes: a plurality of holder holes formed in the probe holder and configured to hold the contact probes; an opening portion formed in each of the holder holes on the one end side of the contact probes, the opening portion including a side wall extending in an axial direction of the holder hole from an opening end of the holder hole; and a bottom surface portion provided at an end of the side wall in the axial direction, the end being an end opposite to the opening end.

The invention relates to a flow battery electrolyte and application thereof, and belongs to the technical field of flow batteries. The flow battery electrolyte provided by the invention comprises a water-soluble metal coordination compound, a central atom of the water-soluble metal coordination compound comprises transition metal, and a ligand contains a hydrophilic group. The water-soluble metal coordination compound is used as the catalyst in the electrolyte of the flow battery, and the catalyst can be dissolved and uniformly dispersed in the electrolyte of the flow battery. In the charging and discharging process, the catalyst can flow along with electrolyte and fully contact with an active substance and an electrode, the valence state change of central metal ions and a large electron conjugated system provide abundant electrochemical reaction active sites, the activation energy of electrochemical reaction is reduced, the reaction rate is improved, the current density of the flow battery is favorably improved, and the service life of the flow battery is prolonged. And the power density and the energy efficiency of the flow battery system are improved.

The invention discloses a water quality monitoring device and a monitoring method thereof, belongs to the technical field of water quality monitoring, and solves the problems that trace hydrogen sulfide generated by sulfate reducing bacteria in a deposited layer at the bottom of a water tank which is not cleaned for a long time in a low-oxygen environment reacts with a platinum membrane electrode of a residual chlorine sensor to generate a platinum sulfide covering layer; and the electrode reading is continuously virtually high and drifts slowly. Comprising an optical transmitting module, an optical receiving module, a spectrum separation module, a signal conditioning module, a lock-in amplification module, a spectrum feature extraction module and a hydrogen sulfide recognition engine. Residual chlorine is monitored in a non-contact mode, deep ultraviolet pulse light is emitted to penetrate through a water body, a reflection spectrum is received, second derivative spectral characteristics are extracted through multichannel signal processing, and multivariable regression compensation is executed to calculate a real residual chlorine value after hydrogen sulfide interference characteristics are recognized. Meanwhile, the drift trend is quantified based on the double-time-constant integral, graded early warning is triggered, industrial standard signals are finally output, and the problem of electrode contact pollution is avoided in the whole process.

A semiconductor device includes a substrate, a buffer layer over the substrate, an n-type electrode overlapping the buffer layer, and an electron injection layer in contact with the n-type electrode over the buffer layer. The electron injection layer includes an n-type dopant and a first nitride semiconductor containing gallium. The first nitride semiconductor further contains at least one element of aluminum and indium.

The embodiment of the invention provides a testing device and an interface resistivity detection method, and relates to the field of semiconductors. The testing device is used for detecting a to-be-tested sample. The testing device comprises a sample table, and an image detection device, a first detection device and a second detection device which are arranged on the sample table, the testing device further comprises a current source, a voltage detection device and a processor. The current source and the voltage detection device are connected with the first detection device and the second detection device. Wherein the image detection device is used for acquiring an image of a to-be-detected sample placed on the sample table; the processor is used for controlling the first detection device to be in contact with a first electrode in the to-be-detected sample and controlling the second detection device to be in contact with a second electrode in the to-be-detected sample according to the image, displayed by the image detection device, of the to-be-detected sample; the current source is used for providing constant current for the to-be-tested sample; the voltage detection device is used for detecting a voltage value between the first electrode and the second electrode of the to-be-detected sample.

The invention relates to a micro display device and a preparation method. The micro-display device comprises a driving backboard, a first pixel layer and a second pixel layer, the mother pixel comprises a plurality of sub-pixels, the bottom end of each sub-pixel is electrically connected to the corresponding first-type electrode contact through a bottom conductive layer, and the top ends of the plurality of sub-pixels are interconnected through a top conductive layer to form a top copolar structure; a hole channel is formed in one sub-pixel in the first pixel layer, a peripheral light-emitting area is formed on the periphery of the hole channel, and a non-copolar conductive piece penetrates through the hole channel. At least part of light emitted by the peripheral light-emitting area is emitted out through the periphery of the upper sub-pixel electrically connected with the non-copolar conductive piece in the hole channel. A color conversion layer is also arranged above the first pixel layer; and the color conversion layer is positioned on a light emitting path of the corresponding sub-pixel in the first pixel layer. The invention further discloses a preparation method. The light efficiency and the reliability of the micro display device can be effectively improved.

A display device comprises electrode patterns spaced apart from each other in a first direction; a via layer disposed on the electrode patterns; first electrodes, each of the first electrodes partially overlapping an electrode pattern of the electrode patterns on the via layer in a plan view and extending in a second direction intersecting the first direction; second electrodes, each of the second electrodes comprising a portion extending in the second direction, the first electrodes and the second electrodes being spaced apart from each other and alternately disposed with each other; and light emitting elements disposed on a first electrode of the first electrodes and a second electrode of the second electrodes. The first electrodes are in contact with the electrode patterns through first electrode contact holes penetrating the via layer, and the first electrode contact holes are spaced apart from each other in the first direction.

The invention provides a method for testing the contact resistance of a solar cell film, which comprises the following steps of: preparing a plurality of multi-layer stacked test samples with different thicknesses, and alternately depositing an amorphous silicon film and a transparent conductive oxide film on a glass substrate of each sample to form a horizontal laminated structure; respectively arranging silver electrodes on the left side and the right side of each sample for performing voltage-current volt-ampere test, and recording the total resistance of each sample in a specified voltage range and the change condition of the total resistance along with the thickness of the film layer; electrode contact resistance is measured and deducted; reversely deducing the resistance value when the thickness of the film layer is 0 through an extrapolation method to obtain the contact resistance between the film layers; and calculating the contact resistance of a single interface according to the number of contact interfaces of the amorphous silicon film and the transparent conductive oxide film in the sample. The method is suitable for a test system under different manufacture procedures and thickness changes, and quantitative extraction of the contact resistance between the amorphous silicon and the TCO is achieved.

The invention provides a gel electrolyte with a controllable polymerization degree, a preparation method of the gel electrolyte, a semi-solid lithium ion secondary battery and a preparation method of the semi-solid lithium ion secondary battery, and relates to the technical field of lithium ion batteries. Raw materials for preparing the gel electrolyte comprise a cyclic ether monomer, an initiator and a polymerization inhibitor; the cyclic ether monomer is subjected to ring opening polymerization to obtain an ether polymer; the polymerization inhibitor is an inorganic lithium salt, and the polymerization degree of the gel electrolyte is determined by the dosage of the polymerization inhibitor and the dosage of the initiator. The gel electrolyte provided by the invention has the fluidity advantage of a liquid electrolyte and the flexibility advantage of a solid polymer electrolyte, and is beneficial to maintaining a stable contact interface between the electrolyte and an electrode, reducing interface impedance and improving ion transmission.

According to one embodiment, provided is a carbon dioxide absorption-release device including a pair of electrodes, an aqueous electrolyte, a first electrolyte flow path, and a second electrolyte flow path. Each of the pair of electrodes include a porous composite, where the porous composite contains an electro-conductive component and a porous material on the electro-conductive component, and the porous material includes a reactive moiety for electrochemical proton transfer. In the first electrolyte flow path, one of the pair of electrodes contacts the aqueous electrolyte. In the second electrolyte flow path, the other of the pair of electrodes contacts the aqueous electrolyte.

The invention relates to an anti-radiation five-junction solar cell and a preparation method thereof, and belongs to the technical field of semiconductor devices. The radiation-proof five-junction solar cell comprises a substrate, and a first buffer layer, a first component order change buffer layer, a fourth sub-cell, a second component order change buffer layer, a fourth tunnel junction, a fifth sub-cell and an electrode contact layer which are sequentially stacked on a first surface of the substrate, a second buffer layer, a third tunnel junction, a third sub-cell, a second tunnel junction, a second sub-cell, a first tunnel junction, a first sub-cell and a cap layer are sequentially stacked on the second surface of the substrate; and the base region thicknesses of the second sub-cell, the third sub-cell and the fourth sub-cell are smaller than the respective emitter region thicknesses. The anti-radiation five-junction solar cell comprises a plurality of sub-cells with quantum well structures, so that the anti-radiation performance of the solar cell can be effectively improved, and the last-stage use efficiency of the solar cell is further remarkably improved.

The invention relates to an LED display device and a preparation method, the LED display device comprises a substrate and a pixel layer, the pixel layer comprises pixel units, the periphery of each pixel unit is at least surrounded by an annular partition groove, each pixel unit is at least partially overlapped with the outermost annular partition groove of the adjacent pixel unit, and the outermost annular partition groove of each pixel unit is at least partially overlapped with the outermost annular partition groove of the adjacent pixel unit. The compound semiconductor is reserved in the non-overlapping region; or, a compound semiconductor is reserved between each pixel unit and the outermost annular partition groove of the adjacent pixel unit, so that the pixel units and the adjacent pixel unit are completely separated from each other; the top of each pixel unit is electrically connected with the second type of electrode contacts, the bottom of each pixel unit is electrically connected with the first type of electrode contacts, the projection area of each pixel unit on the substrate is defined as a first projection area, and the second type of electrode contacts are formed in the first projection area of the corresponding pixel unit. The invention further discloses a preparation method of the LED display device. The photoelectric performance and the reliability of the LED display device can be improved.

The invention relates to a graphene hydrogel neural microelectrode and a preparation method thereof.The neural microelectrode comprises a long-strip-shaped electrode body, the electrode body comprises an insulating substrate layer, a conductive layer and an insulating covering layer, and the conductive layer is wrapped and sealed by the insulating substrate layer and the insulating covering layer; a contact window is arranged at one end, close to the electrode body, of the insulating covering layer, a conductive expansion layer made of graphene hydrogel is arranged below the contact window and the insulating covering layer on the periphery of the contact window, the conductive expansion layer is electrically connected with the conductive layer, and the conductive expansion layer can expand after being heated or absorbing water to form an electrode contact protruding outwards from the contact window. Amino multi-walled carbon nanotubes, amino graphene quantum dots and gold nanoparticles are loaded in the graphene hydrogel. The electrode contact has the advantages that after the electrode contact is heated or absorbs water, the conductive expansion layer expands to form the electrode contact protruding out of the contact window, and the electrode contact is good in tissue affinity, capable of making better contact with nervous tissue and more excellent in performance.