44results about How to "Strong process compatibility" patented technology

The application discloses a gallium oxide vertical device and a preparation method thereof. The gallium oxide vertical device comprises an epitaxial structure, a cathode and an anode matched with the epitaxial structure, the epitaxial structure comprises a heavily doped n-type Ga2O3 substrate, a lightly doped n-type Ga2O3 drift region, an interlayer and a p-type nitride epitaxial layer which are sequentially stacked, the lightly doped n-type Ga2O3 drift region, the interlayer and the p-type nitride epitaxial layer form a p-i-n structure, the cathode forms an ohmic contact with the heavily doped n-type Ga2O3 substrate, and the anode forms an ohmic contact with the p-type nitride epitaxial layer, wherein the material of the interlayer is an Al-containing compound, and the surface layer region of the lightly doped n-type Ga2O3 drift region close to the interlayer also has Al elements, the Al elements are diffused into the lightly doped n-type Ga2O3 drift region in the bonding process under high pressure.

The application provides a fiber-optic Fabry-Perot sensor based on light beam convergence and a manufacturing method thereof, and relates to the technical field of semiconductors. The sensor comprises a diaphragm layer, an intermediate layer and a bottom layer which are arranged in layers; the diaphragm layer is provided with a first groove, the intermediate layer is attached to the diaphragm layer in a manner that a first layer surface thereof faces the first groove, so as to form a Fabry-Perot cavity based on the first groove; the bottom layer is provided with a second groove, the intermediate layer is attached to the bottom layer in a manner that a second layer surface thereof faces the second groove, so as to form a nano-containing cavity based on the second groove; the second layer surface of the intermediate layer is formed with a micro-nano anti-reflection structure comprising array-distributed anti-reflection units located in the nano-containing cavity; and the bottom layer is formed with a micro-nano collimation structure comprising array-distributed collimation units located in the nano-containing cavity and in a symmetrical positional relationship with the micro-nano anti-reflection structure. The application at least reduces the manufacturing complexity.

The application provides a semiconductor device and a manufacturing method thereof. The method comprises: forming a drift layer on a substrate; forming a first epitaxial layer on the drift layer, doping a partial region of the first epitaxial layer to form a shielding region, and the first epitaxial layer not doped is a first doped region; forming a second epitaxial layer on the first epitaxial layer, doping a partial region of the second epitaxial layer to form a first contact region, and the second epitaxial layer not doped is a second doped region; forming a third epitaxial layer on the second epitaxial layer, doping a first region of the third epitaxial layer to form a second contact region, doping a second region of the third epitaxial layer to form a source region, and the third epitaxial layer not doped is a body region; forming a trench gate structure, an interlayer dielectric layer and a source metal layer. The application makes the shielding region electrically connected with the source metal layer, so that the shielding region potential is clamped by the source, thereby effectively inhibiting the electric field peak at the trench corner in the blocking state.

The invention provides a high-valued utilization method and device for residual liquid in a rectifying tower in the production process of 1, 4-cyclohexanedimethanol, and relates to the technical field of by-product purification, and the method comprises the following steps: adding residual liquid in a CHDM rectifying tower, a catalyst and methanol into a methanol alcoholysis tank for alcoholysis reaction; introducing the alcoholysis solution into a scraper evaporator for distillation separation, and conveying a product into a gas-liquid separation tank to obtain an alcoholysis concentrated solution; and introducing the alcoholysis concentrated solution into an alcoholysis solution recovery tower for vacuum rectification, and condensing to obtain a crude product CHDM. According to the method, a methanol alcoholysis process is innovatively adopted, the CHDM rectifying tower kettle residual liquid is efficiently converted into high-value products such as CHDM, MHMCC and DMCD, and the products can be directly recycled to an existing CHDM rectifying system; through a designed methanol and tower kettle residual liquid recycling system, efficient utilization of raw materials and emission reduction of wastes are realized; a high-efficiency catalyst is adopted, so that conversion can be realized under mild conditions; and the catalyst can be used together with a device, and can be directly connected to the existing CHDM rectification device without modifying the original device.

The invention relates to a funnel diode realized based on a nanopore modified dielectric polymer molecule monolayer, and relates to the technical field of semiconductor devices. The preparation method of the funnel diode comprises the following steps: forming a three-layer PVP dielectric film through bi-crosslinking treatment, and constructing a nanopore array on the surface of the three-layer PVP dielectric film by using a soft nanoimprint technology to form a polymer nano dielectric layer; sequentially depositing an organic semiconductor layer and a top electrode to complete a diode main body structure; and finally, integrating a molecular memory monolayer formed by gold nanoclusters or copper stearate. The device is compact in structure, the unidirectional convergence of current carriers is realized by utilizing a funnel effect generated by the nanopores, and the device has the characteristics of high-voltage rectification ratio and ultralow working voltage under the coordination of a single molecular layer, and has nonvolatile storage and synaptic plasticity.

This invention belongs to the field of advanced nuclear energy structural materials preparation and performance regulation technology, specifically relating to a strong magnetic field heat treatment method for improving the mechanical properties and radiation resistance of RAFM steel. The method includes the following steps: 1) obtaining raw RAFM steel; 2) quenching and tempering the raw RAFM steel sequentially; 3) placing the tempered RAFM steel in a vacuum heat treatment furnace and simultaneously applying a steady strong magnetic field for long-term high-temperature aging treatment; 4) after aging, cooling the RAFM steel to room temperature under magnetic field maintenance or slow demagnetization conditions to obtain reinforced RAFM steel. By introducing a steady strong magnetic field as an active control method into the high-temperature aging process, the microstructure of ferromagnetic materials is optimized through the physical effects of the magnetic field on atomic diffusion, phase transition behavior, and precipitation kinetics, thereby synergistically improving its mechanical properties and radiation resistance.

The application relates to the technical field of LED, in particular to a high-reliability reverse-polarity red LED chip and a manufacturing method thereof. x The reverse-polarity red LED chip is sequentially provided with a silicon substrate, a metal bonding layer, a silver mirror layer, a dielectric layer, an epitaxial layer, a GaAs contact layer, an N-type electrode, a roughening layer and a SiO2 / SiN x composite passivation layer, three-layer gradient in-situ fusion sealing layer; the three-layer gradient in-situ fusion sealing layer covers the cutting path sidewall of the reverse-polarity red LED chip; the three-layer gradient in-situ fusion sealing layer is sequentially provided with an AuSn-based anticorrosion layer, a TiO2 insulating layer and a SiO2 mechanical protection layer from inside to outside. Through adjustment of the chip structure and cooperation with a laser cutting process, the problems of silver ion migration, electrochemical corrosion, sulfidation corrosion and sidewall microcrack failure are effectively solved, and the long-term service reliability of the chip is greatly improved.

This application provides a display panel and a display device. The display panel includes: a substrate, and a photocell cell unit, a transparent insulating layer, and an OLED light-emitting unit sequentially stacked on the substrate; the first electrode layer of the photocell cell unit is a light-transmitting electrode layer; the OLED light-emitting unit includes a plurality of sub-pixel light-emitting units, which are designed to be semi-transparent; the photocell cell unit and at least one of the plurality of sub-pixel light-emitting units have at least a partial overlap area in the vertical projection direction, and the light-transmitting color of the photocell cell unit is the same as the light-emitting color of the sub-pixel light-emitting unit with the overlapping area; the photocell cell unit is used to convert ambient light and / or incident light from the sub-pixel light-emitting units into electrical energy. The display panel of this application has a self-charging function and does not require a polarizer or COE structure, thus improving display brightness and contrast.

The invention discloses a wire harness assembly, an automobile wire harness and a new energy automobile, and belongs to the technical field of automobile wire harnesses. The wire harness assembly comprises a cable and a connecting terminal, a stranded conductor of the cable is formed by stranding copper-aluminum-steel composite metal wires, a base body of the connecting terminal is formed by adopting a copper-aluminum-steel composite metal plate with an inner side copper layer, a middle aluminum layer and an outer side steel layer, and the stranded conductor is fixedly connected with the connecting terminal through solid-phase welding. Through the copper-aluminum-steel composite structure, the high conductivity of copper, the light weight of aluminum and the high strength and high elasticity of steel are integrated, the weight and cost of the wire harness can be effectively reduced, the contact resistance is reduced, galvanic corrosion is fundamentally inhibited, the connection reliability is improved, and the copper-aluminum-steel composite wire harness can be widely applied to high-voltage and low-voltage wire harness systems of new energy automobiles. The lightweight level of the whole vehicle and the safety and stability of an electrical system are improved.

This invention belongs to the field of semiconductor manufacturing technology, and relates to a diamond-silicon carbide composite substrate, its preparation method, and its application. The preparation method includes the following steps: coating a silicon substrate with SiC quantum dot sol and annealing it with pulsed laser to obtain a nucleation dot array; sequentially depositing a gradient buffer layer, a 3C-SiC thin film, and a diamond layer; and polishing the surface of the 3C-SiC thin film. The gradient buffer layer is a SiGeC gradient buffer layer with a thickness of 5-10 nm; the 3C-SiC thin film has a thickness of 0.5-5 μm. This invention can achieve stable composite formation of an ultrathin SiC layer with uniform thickness and a smooth surface with diamond while ensuring interfacial bonding strength and structural integrity, which is beneficial for the development and application of high-performance diamond-silicon carbide composite substrates.

This invention relates to the field of micro / nano manufacturing technology, and in particular to a high-refractive-index fluidized nanoparticle, a hybrid photoresist, a patterned coating, and methods for preparing the respective. The high-refractive-index fluidized nanoparticle comprises a core, the core being modified with a first ligand and a second ligand; the first ligand is one or more selected from methacrylic acid, 4-pentenoic acid, methacryloxypropyltrimethoxysilane, and sodium methacrylate sulfonate; the second ligand is one or more selected from piperidine, N,N-diisopropylethylamine, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, tetramethylguanidine, triethylamine, and tetrahydropyrrole. This invention, through the design of ultra-small metal oxide nanoparticles and innovative organic ligands, successfully solves the technical contradiction of traditional photoresist materials in achieving high resolution, high refractive index, and low curing shrinkage.

The invention provides sintered ore with a coating structure and a preparation method and system.The preparation method comprises the steps that lump ore is subjected to high-temperature preheating treatment and then crushed and screened, and lump ore particles are obtained; uniformly mixing an iron-containing raw material, a CaO-containing flux, a fuel and water to obtain an outer-layer mixed material; after the lump ore particles are put into a disc pelletizer, atomized water is sprayed to the surfaces of the lump ore particles; caO is sprayed to the surfaces of lump ore particles; the outer-layer mixed material is added into a disc pelletizer, atomized water is continuously sprayed for pelletizing, screening is conducted after pelletizing is finished, and a green pellet mixed material is obtained; conveying the green pellet mixture to a sintering machine, igniting the green pellet mixture, and sintering the green pellet mixture under the condition of injecting hydrogen-rich gas to obtain high-temperature sintered ore; and hydrogen is adopted as a cooling agent to cool the high-temperature sintered ore, and pre-reduction of the high-temperature sintered ore is achieved in the cooling process. The sintered ore has high strength and air permeability, the utilization ratio of lump ore is increased, lump ore fragmentation is avoided, and therefore the metallurgical performance of the lump ore is improved.

The invention discloses a two-region InSb-based quantum dot Mirco-LED capable of efficiently emitting near-infrared and a preparation method thereof.The preparation method comprises the steps that firstly, a pixelated pattern is formed on a transparent conductive substrate through photoetching and wet etching, and then functional layers such as a hole injection layer, a hole transmission auxiliary layer, an InSb quantum dot light-emitting layer and an electron transmission layer are prepared in sequence; and finally, manufacturing the device through vacuum evaporation of an electrode and ultraviolet curing packaging. According to the invention, an environment-friendly and nontoxic InSb quantum dot material is adopted, efficient emission of a wave band of 1000-1700nm is realized through a pixelated structural design and a multi-layer spin-coating process, and meanwhile, the device has excellent miniaturization integration level and long-term stability; the technical problem that a traditional near-infrared light-emitting device is difficult to consider the aspects of wavelength range, environmental friendliness and integration level is effectively solved.

This disclosure relates to the field of microelectromechanical systems (MEMS) technology, specifically to a method for fabricating a MEMS micromirror structure and the MEMS micromirror structure itself. The method includes: providing a substrate and forming a protective layer covering a target surface of the substrate; providing a silicon wafer, the back side of which includes a first sacrificial layer for defining a micromirror anchor layer; forming a first patterned photoresist layer covering the first sacrificial layer for defining a back comb layer; forming a back comb layer within the silicon wafer based on the first patterned photoresist layer; etching the silicon wafer based on the first sacrificial layer and the back comb layer to obtain a protrusion located directly below the first sacrificial layer; removing the first sacrificial layer and bonding the top surface of the protrusion to the substrate; forming a mirror electrode on the front side of the thinned silicon wafer and then forming a first patterned mask layer covering the mirror electrode; and etching the silicon wafer at least twice based on the first patterned mask layer to form the MEMS micromirror structure. This method can at least reduce the complexity and cost of the fabrication process and improve product yield and integration.

This invention belongs to the field of high-temperature alloy smelting technology and discloses a self-consumable melting method for preparing HT700P-HT700T ingots with axial compositional gradient. The method includes: reverse-engineering the axial dimensions and tenon-and-mortise interface geometry parameters of the transition section of a combined self-consumable electrode based on the target axial compositional gradient distribution of the ingot; preparing a first alloy electrode and a second alloy electrode with the aforementioned interface and connecting them to form a combined self-consumable electrode; remelting the electrode in a vacuum self-consumable arc furnace; adaptively adjusting the power supply regime and controlling the melting rate based on the mapping relationship between the electrode consumption position and the process parameter set when melting to the transition section; and obtaining an HT700P-HT700T alloy ingot with axial compositional gradient after furnace cooling. This invention achieves precise control over the compositional gradient distribution morphology and transition zone length of the ingot, resulting in a stable melting process, smooth compositional transition, and good metallurgical quality.

The invention discloses a porous copper foil taking an aluminum foil as a cathode carrier and a preparation method and application thereof, and the preparation method comprises the following steps: preparing an electrolyte: taking deionized water as a solvent of the electrolyte, and containing copper sulfate, sulfuric acid, chloride ions, SPS (Sulfonyl Phosphate Sulfonate), PEG (Polyethylene Glycol) and collagen; electrode assembly: putting a titanium plate as an anode and an aluminum foil as a cathode into the electrolytic cell, wherein the titanium plate and the aluminum foil are relatively arranged in parallel; and electrolytic deposition is conducted, specifically, direct current is introduced into the electrolytic cell for electrochemical deposition, the electrolysis temperature is controlled to be 30-60 DEG C, the current density is 10-50 A / dm, a stirring device is adopted to stir electrolyte in the electrochemical deposition process, the stirring speed is 50-300 r / min, and the porous copper foil is directly deposited on the surface of the aluminum foil cathode. The preparation method has the beneficial effects that accurate control of the thickness, the pore diameter and the porosity of the porous copper foil is realized through coordinated regulation and control of electrolyte components and process parameters.

The invention relates to a preparation method of a bio-based 1, 5-pentamethylene diisocyanate product with yellowing resistance and high stability. A synergistic composite stable system composed of an efficient main antioxidant, an auxiliary antioxidant and a plurality of ultraviolet absorbents / light stabilizers in a scientific proportion is constructed. Wherein the main antioxidant is mainly used for capturing free radicals and blocking an oxidation chain reaction; the auxiliary antioxidant decomposes hydroperoxide to inhibit the hydroperoxide from further initiating the degradation of the material; the ultraviolet stabilizer effectively delays the color change process caused by illumination by absorbing or quenching excited state energy. The preparation method disclosed by the invention has the advantages of high process compatibility, easiness in acquisition of auxiliaries, simple compounding and post-treatment steps and convenience in large-scale popularization; the environmental protection property is outstanding, the yellowing resistance and the storage stability of the product are greatly improved, the normal-temperature closed storage period is prolonged to 6 months or above, the NCO content retention rate is greater than or equal to 96%, and the storage and transportation cost is reduced; the influence of thermal oxidation and photodegradation is resisted, and a complex application environment is adapted.

The invention discloses a device beneficial to improving the light extraction efficiency of a laminated perovskite light-emitting device. In the device, a perovskite thin film of at least one light-emitting unit is composed of discrete-structure perovskite crystal grains with a light scattering effect. Light emitted by a light-emitting unit of the device has a scattering effect after passing through the discrete perovskite thin film, so that wide-angle emission of light is increased, absorption of photons by perovskite crystal grains in each layer is enhanced, the photon circulation effect is further improved, and the light-emitting efficiency of the LED device is improved. Through the discrete perovskite thin film structure design, the probability that photons are absorbed by perovskite crystal grains and then emitted can be increased through light scattering, and therefore the performance of the laminated LED is improved.

The invention discloses a preparation method of an aluminum foil blank for a high-strength 8021 battery soft package, and belongs to the technical field of aluminum alloy processing. According to the method, an 8021 alloy cast ingot serves as a raw material, hot rolling, segmented cold rolling, medium and low temperature intermediate annealing, finish rolling and other procedures are carried out, and the high-strength aluminum foil blank is prepared by optimizing rolling reduction distribution and roll surface roughness. The tensile strength of the obtained blank is larger than or equal to 170 MPa, the plasticity and the surface quality are excellent, the process energy consumption is lower, equipment does not need to be newly added, and the method is suitable for industrial production of the aluminum foil blank for the high-end soft package lithium battery aluminum-plastic film.

The invention relates to the technical field of papermaking pulping, and discloses a circulating waste paper fiber high-yield low-carbon pulping system and technology.The circulating waste paper fiber high-yield low-carbon pulping system comprises a pulping system, a coarse screening system, a grading system, a deslagging system and a heat dispersion system, and the deslagging system comprises a long fiber deslagging unit and a short fiber deslagging unit; a slurry distributor is arranged between the grading system and the long fiber deslagging unit and the short fiber deslagging unit, tailing outlets of the long fiber deslagging unit and the short fiber deslagging unit are connected with a fluffer, and the discharging end of the fluffer is communicated with the feeding end of the heat dispersion system; through the synergistic effect of up-flow screening, grading deslagging and tailing recycling, the utilization efficiency of waste paper fibers is greatly improved, resource waste is effectively reduced, and meanwhile energy consumption and pollutant emission in the pulping process are remarkably reduced; the pulp purification effect is fully guaranteed, impurities such as stickers are effectively removed, and the cleanliness of accepted pulp is improved.

The application provides a negative electrolyte for an alkaline zinc-manganese flow battery, which is composed of a strong base, a zinc-containing active substance, a nitrogen-containing organic compound additive and deionized water. ‑2 The alkaline zinc-manganese flow battery adopting the electrolyte has a 60mA·cm ‑2 The Coulombic efficiency reaches 98.3%, the energy efficiency reaches 80%, the cycle life is improved from 48h to 155h, and the alkaline zinc-manganese flow battery has the advantages of low cost, simple process and wide application prospect.

The application relates to the technical field of composite film materials, and particularly discloses a bifunctional composite carrier as well as a preparation method and application thereof. 1‑a X a The ceramic material is selected from at least one of Al2O3, ZrO2, YSZ, TiO2, SiC or MoSi2. The bifunctional composite carrier provided by the application has structural support strength and high-efficiency heating performance, effectively making up the blank in the prior art that no ideal support body material is used in the field of Joule heat and has excellent electric conductivity to realize rapid and uniform heating, a suitable pore structure to ensure low-resistance mass transfer, and excellent mechanical strength and stability at high temperatures.

This invention relates to the field of functional textile technology, and discloses a method for preparing a light-triggered, sustained-release traditional Chinese medicine antibacterial and mosquito-repellent outdoor textile for outdoor environments, as well as the resulting product. The preparation method involves: providing a light-triggered, sustained-release traditional Chinese medicine antibacterial and mosquito-repellent polyamide masterbatch, which consists of a polyamide matrix, uniformly dispersed traditional Chinese medicine composite microcapsules, and hindered amine light stabilizers. The core of the microcapsules contains Artemisia argyi oil, citronellal, and eugenol. The masterbatch is blended with the polyamide matrix, spun, and woven to obtain a grey fabric. The grey fabric is then subjected to ultraviolet light activation treatment to form an initial antibacterial and mosquito-repellent active layer. Finally, the outdoor textile is obtained through finishing. This invention utilizes the photosensitivity of hindered amine light stabilizers to achieve on-demand release triggered by ultraviolet light. The resulting textile exhibits antibacterial and mosquito-repellent effects, retaining ≥80% of its function after 20 washes. It is suitable for outdoor products such as tents, outdoor clothing, and sleeping bags, and has outstanding advantages such as long-lasting effectiveness, environmental safety, and ease of use.

The present application relates to ramie degumming process technical field, specifically is a kind of acid-base synergic biological enzyme assisted ramie green degumming method, the method uses NaOH-H2SO4 Synergic treatment system, by acid dipping-alkali dipping two-step method synergistic effect, acid dipping stage is treated with 1%-5% H2SO4 Solution adding surfactant etc., alkali boiling stage is treated with 2%-6% NaOH solution adding sodium silicate etc., combined with biological enzyme auxiliary treatment, realize efficient degumming, the present application acid-base synergic biological enzyme assisted ramie green degumming method, gum removal rate is >90%, reduce 20%-30% alkali dosage, fiber breaking strength is increased by 20%-25%, wettability is significantly improved, residual glue rate is as low as 2% or less, and reduce production cost and wastewater treatment cost, adapt to existing production line, can satisfy high-end textile demand.

The application discloses a high-performance titanium alloy material for promoting spheroidization and a preparation method thereof, and belongs to the field of high-strength and high-toughness titanium-based alloy materials, and comprises the following steps: high-purity raw materials are smelted into titanium-based alloy button ingots containing different tin element contents by using a vacuum induction smelting furnace; after homogenization treatment of the titanium-based alloy button ingots, a high-performance titanium alloy material is obtained by adopting a sectional hot rolling process; and the high-performance titanium alloy material is subjected to mechanical property testing, and the longitudinal mechanical test results are as follows: yield strength is 880-1080 MPa, tensile strength is 1020-1220 MPa, and elongation is 12.5-23%; and the transverse tensile test results are as follows: yield strength is 920-1100 MPa, tensile strength is 1050-1290 MPa, and elongation is 11-20%. The Ti80 zirconium element is replaced by doping of the tin element, and the rolling process is controlled to promote spheroidization of the structure, so that the strength and ductility of the titanium-based alloy are improved.

The invention provides a preparation method for improving the compaction density of regenerated lithium iron phosphate and a product application. Aiming at the problem that the compaction density of the retired lithium iron phosphate material is low due to particle mechanical property degradation, particle size distribution imbalance and conductive structure damage, a cooperative regulation and control mechanism of body strengthening, interface plasticizing and conductive reconstruction is constructed, and a low-cycle atomic layer deposition and fused salt treatment combined process is adopted, so that the compaction density of the retired lithium iron phosphate material is improved. And the structure integrity, the interface compactness and the conductive network of the regenerated lithium iron phosphate particles are subjected to system reconstruction, so that the stacking efficiency and the compaction performance of the material are remarkably improved. The method is simple in technological process, low in energy consumption, capable of being directly integrated to an existing regeneration production line, suitable for lithium iron phosphate materials with different degradation degrees, environmentally friendly and high in resource utilization rate due to the adoption of a closed molten salt circulation system. The treated regenerated lithium iron phosphate material can meet the application requirements of high-compaction-density and high-energy-density batteries, and has a good industrialization prospect.

The application provides a laser shock peening method based on the coupling of magneto-caloric effect and pre-stress, comprising the following steps: S1: performing magneto-caloric pretreatment on a metal material, wherein the magneto-caloric pretreatment is performed under a temperature condition lower than the recrystallization temperature of the metal material, and an alternating magnetic field with a strength greater than 1T is applied; S2: applying pre-stress to the metal material after the magneto-caloric pretreatment; S3: performing laser shock peening on the metal material while the magneto-caloric field and / or the pre-stress are maintained; and S4: performing heat preservation and gradient cooling treatment on the metal material after laser shock. Through the synergistic effect of the magneto-caloric coupling effect and the pre-stress regulation, the core problem of the difficulty of laser shock peening of hard materials is effectively solved.

This application discloses an AlGaInP red micro-LED chip with a high Al composition polarization-induced barrier layer and its fabrication method. The core innovation lies in the use of an Al composition in the barrier layer of the quantum well structure. x2 Ga 1‑x2 ) y2 InP gradually changes to Al 0.5 In 0.5 The high Al composition structure of P elevates the valence band level to 250-320 meV, significantly enhancing carrier confinement capability. Simultaneously, the barrier layer employs low-concentration p-type doping, inducing the formation of a three-dimensional hole gas through the polarization effect of the gradual Al composition change, allowing the hole concentration to break through the doping limit and avoiding the luminescence quenching problem caused by high doping. This solves the core problems of insufficient carrier confinement, low hole injection efficiency, and poor high-temperature stability in existing red Micro-LED chips. The device's external quantum efficiency, high-temperature retention rate, and long-term reliability are all significantly improved. The fabrication process is compatible with existing production lines and is applicable to multiple fields.

The utility model discloses a kind of semiconductor chips, it includes device structure, insulating layer, metal connection layer, first passivation layer and alumina passivation layer;The insulating layer is located on device structure, the metal connection layer is located on insulating layer and is electrically connected with device structure;The bottom sidewall of the metal connection layer is retracted and forms recessed area between the surface of the insulating layer;The first passivation layer is located on metal connection layer and insulating layer;The alumina passivation layer and first passivation layer form laminated structure, cover the metal connection layer and extend to cover peripheral insulating layer surface, can fill recessed area and peripheral passivation layer fine seam, so that water vapor cannot directly through passivation layer crack intrusion metal, improve product reliability.

The application discloses a composite current collector and a vertical graphite directional deposition method and application of a copper foil surface of the composite current collector. The method comprises the following steps: preparing a (111) single crystal copper foil, evaporating an island-shaped nano copper transition layer, and adopting a two-stage PECVD process to form a planar buffer layer at low power and then to excite vertical growth at high power, and combining pulse gas supply and spectrum monitoring to realize accurate thickness control. The prepared composite current collector has a structure of "single crystal copper foil / planar graphene buffer layer / vertical graphene", the interface resistance is less than 60 Ω, and the contact angle is greater than 125°, and the composite current collector is suitable for fields of lithium ion battery current collectors, heat-conducting interface materials and field emission devices.