228 results about "Electronic industry" patented technology

The invention discloses a multi-mode CNN / Transform image defect diagnosis tracking decision-making method, and belongs to the field of power electronic industry detection. According to the method, defect position multi-modal data of different batches, process stages and equipment are collected, after space-time alignment and image enhancement preprocessing and alignment are conducted, features are extracted through position coding, a CNN shallow network and ResNet-18, the features are fused into multi-modal feature vectors in combination with weights, a detection model is obtained through CNN / Transform model training, defect diagnosis and tracking decision making are achieved, and the defect diagnosis and tracking decision making efficiency is improved. The problems of precise detection, positioning, diagnosis tracking and decision-making of internal tiny component changes and structural defects of electronic products and local and overall multi-mode defects of single electric power are solved. The detection accuracy is improved by 20%, the diagnosis accuracy is more than 98.5%, the defect tracking error is less than 5%, the decision-making efficiency is improved by 40%, and the defect prediction capability is improved by 22%.

The invention discloses a preparation method of a nano lanthanum hexaboride reinforced titanium-based composite material, which comprises the following steps: performing low-energy ball milling and high-energy ball milling on a pure titanium metal powder and / or titanium alloy powder base material and a nano lanthanum hexaboride powder reinforced phase to obtain composite powder; sintering in a rapid hot-pressing sintering furnace, and cooling to obtain a LaB6 / Ti-based sintered blank; and carrying out heat-preservation hot rolling in a vacuum heat treatment furnace. The invention further discloses the nanometer lanthanum hexaboride reinforced titanium-based composite material and application. The nanometer lanthanum hexaboride reinforced titanium-based composite material has excellent strength and ductility, the tensile strength reaches 1035 MPa, the percentage elongation after fracture is 5%-25%, and the strength is improved by 60% or above compared with that of pure titanium; the preparation method is short in process, high in efficiency, low in production cost, high in universality and suitable for various titanium or titanium alloy base materials, and the composite material has good application prospects in the fields of radar, aviation, aerospace, automobiles, electronic industry and biomedicine.

The invention discloses a process for preparing ultra-pure hydrogen by recovering and purifying hydrogen. The process comprises the following steps: nitrogen replacement: carrying out three times of pressurization-decompression circulation on an adsorption tower and a pipeline; pretreatment of raw materials: hydrogen-containing tail gas is treated by a buffer tank, a compressor, a desulfurization tower and a horizontal adsorption tower and then enters a PSA (Pressure Swing Adsorption) system; pSA purification: a 6-2-3 / P process is adopted, two towers in six adsorption towers perform adsorption at the same time, and hydrogen larger than or equal to 99.99% is produced; regeneration of the adsorbent is completed through three-stage pressure equalizing and reducing, clockwise / anticlockwise pressure reducing, product hydrogen flushing and three-stage pressure equalizing and boosting; refining by a membrane separation unit: carrying out membrane separation on PSA hydrogen to produce ultrapure hydrogen of which the purity is greater than or equal to 99.999%, and returning trapped gas to a compressor; and condensate water recovery: carrying out steam stripping and deoxygenization on the process condensate liquid, and then taking the process condensate liquid as boiler feed water. The process integrates PSA and membrane separation technologies, realizes efficient and energy-saving ultrapure hydrogen preparation, and is suitable for the fields of green hydrogen energy storage, electronic industry, high-end chemical industry and the like.

The invention relates to a preparation method of silver-coated copper powder for the electronic industry, in particular to a preparation method of silver-coated copper powder for low-temperature slurry, which comprises the following steps: (1) alkali washing; (2) pickling; (3) organic modification; and (4) chemical silver plating is conducted, filtering, cleaning and drying are conducted after chemical silver plating is completed, and the silver-plated copper powder is obtained. Copper powder replacement is inhibited through surface organic modification, so that the copper powder does not participate in the reaction or does not participate in the reaction slightly, on one hand, copper powder raw material waste caused by the replacement reaction can be reduced, and on the other hand, batch instability caused by the morphology and specific surface area difference of the copper powder can be reduced. The silver-coated copper powder prepared by the method has excellent conductivity, high temperature resistance and silver-copper interlayer binding force, and can meet shearing acting forces such as high temperature and extrusion in the preparation and use process of low-temperature slurry.

The invention belongs to the technical field of organic matter purification, and relates to a separation and purification process of NMP (N-Methyl Pyrrolidone). The invention aims to solve the problem that an existing NMP recovery process cannot effectively treat NMP waste liquid generated by different industrial types. The method comprises the following steps: introducing an NMP recovery liquid into a primary filtration unit to obtain pretreated NMP; the conductivity of the pretreated NMP is measured, a chemical neutralization unit, an adsorption unit or a reduced pressure distillation unit is adopted for treatment according to the difference of the conductivity, obtained different products are correspondingly treated and then jointly treated through an extractive distillation unit, and product-grade NMP is obtained. According to the separation and purification process provided by the invention, various impurities in various types of NMP recovery liquid from the electronic industry can be effectively removed, and the electronic-grade NMP solvent can be efficiently recycled.

The invention discloses an electronic industry clean workshop air circulation function self-adaptive adjusting system and method. The adjusting system comprises a three-dimensional grid monitoring module, a data processing module, a visualization module, a computer vision module, an intelligent decision module and an air circulation control module. The adjusting method comprises the steps of three-dimensional grid sensing arrangement and monitoring, data processing, data visualization, image feature extraction, abnormal area early warning, air circulation parameter decision making, self-adaptive adjusting execution and closed-loop feedback optimization. A continuous space distribution model is constructed through real-time monitoring data of a three-dimensional grid sensor and is converted into a dynamic visual three-dimensional heat map, correlation between environment characteristics and air circulation control quantity is further established, and air flow control parameters are output based on local pollution abnormal conditions. The adjusting accuracy of the system on complex working conditions can be remarkably improved, and self-adaptive adjustment and sustainable evolution of the air circulation function are achieved.

The invention relates to the technical field of safe toe cap preparation, in particular to a carbon fiber composite material for manufacturing a special toe cap and a preparation method of the carbon fiber composite material. The invention relates to a carbon fiber composite material for manufacturing a special toe cap. The carbon fiber composite material is formed by hot pressing a plurality of carbon fiber prepreg cloths; the carbon fiber prepreg is prepared from the following raw materials in parts by weight: 60 to 64 parts of carbon fibers, 25 to 28 parts of matrix resin, 3 to 4 parts of low-shrinkage resin, 0.15 to 0.25 part of an initiator, 0.2 to 0.5 part of a cross-linking agent, 4 to 6 parts of styrene, 0.4 to 0.6 part of magnesium oxide, 0.3 to 0.4 part of a defoaming agent, 1 to 1.5 parts of a release agent and 0.6 to 0.8 part of carbon nanotubes. The carbon fibers at least comprise carbon fiber woven roving. The safety toe cap prepared from the carbon fiber composite material disclosed by the invention has good compressive strength, impact strength and antistatic property, and can meet the electrostatic protection requirement of the safety toe cap for the electronic industry.

The invention discloses a high-specific-gravity and high-toughness tungsten-nickel-copper material and a preparation method thereof, and belongs to the technical field of non-ferrous metal materials. The material comprises the following components in percentage by mass: 6-15% of nickel; 2-5% of copper; 2-5% of manganese, and the balance tungsten and inevitable impurities. The preparation method of the material comprises the following steps: preparing materials (pure tungsten powder, pure nickel powder, pure copper powder and pure manganese powder), mixing the powder, pressing, sintering, and carrying out recrystallization annealing heat treatment. In the burdening step, two kinds of tungsten powder with different particle size grades are selected and added, and the gradient particle size ratio is adjusted. By adding the strengthening element manganese, combining the gradient particle size ratio and enhancing interface bonding, the high specific gravity and high strength of the material are kept, meanwhile, excellent toughness can be kept, and the material is suitable for aerospace gyroscope rotors and balance weight parts, electronic industry precise instrument parts, medical instrument ray shielding materials and national defense military industry kinetic energy armor-piercing weapon parts.

The invention provides a copper-nickel-tin alloy strip and a preparation method thereof, and relates to the technical field of copper alloys. The copper-nickel-tin alloy strip provided by the invention comprises the following components in percentage by mass: 8.5%-10% of Ni, 1.5%-3% of Sn, 0.5%-1.5% of Al, 0.3%-0.6% of Si, 0.19%-0.21% of Cr, 0.05%-0.30% of Mn and the balance of Cu. The tensile strength of the copper-nickel-tin alloy strip ranges from 580 MPa to 770 MPa, the percentage elongation after fracture A50 is larger than or equal to 8%, the hardness ranges from 170 HV to 240 HV, the electric conductivity is larger than or equal to 10% IACS, and the grain size is smaller than or equal to 0.015 mm. And the material can be stably applied to elastic sensitive elements of electronic industrial relays, potentiometers, switches, connectors, lead frames, control and instrument sensors and the like.

The invention belongs to the technical field of preparation of copper foils for the electronic industry, and particularly relates to a method for improving the surface corrosion resistance of a copper foil by adopting a 2-mercaptobenzothiazole-cerium composite corrosion inhibitor. The preparation method comprises the following steps: preparing 2-mercaptobenzothiazole; preparing a cerium nitrate solution; preparation of the 2-mercaptobenzothiazole-cerium compound type corrosion inhibitor is carried out; preparing an electro-deposition copper foil; and carrying out corrosion inhibition treatment on the copper foil. According to the method for improving the corrosion resistance of the surface of the copper foil by adopting the 2-mercaptobenzothiazole-cerium composite corrosion inhibitor, the corrosion resistance of the copper foil can be remarkably improved through MBT-Ce corrosion resistance treatment and passivation treatment, so that the service life of the copper foil in a severe environment is prolonged; meanwhile, the surface quality of the copper foil is improved, so that the copper foil is smoother, and subsequent processing and application are facilitated; in addition, the anti-stripping strength value can be improved, so that the adhesive is more durable in the use process; and finally, production efficiency is improved, production cost is reduced, and large-scale production is facilitated.

The invention provides an inorganic fluoride waste environment-friendly treatment system capable of reducing harm, which is suitable for the technical field of inorganic fluoride environment-friendly treatment and comprises a support frame, a plurality of environment-friendly treatment pipes are assembled on the support frame in a sliding manner, and the environment-friendly treatment pipes are driven by a driving assembly to perform closed-loop circulating rotation; a sewage discharge water pipe group is mounted on one side of the support frame and is used for being detachably butted with an environment-friendly treatment pipe; a water outlet pipe group is mounted on the other side of the support frame and is used for receiving fluid treated by the environment-friendly treatment pipe; chemical waste liquid containing inorganic fluoride waste is guaranteed to be in full contact with the modified zeolite, comprehensive and full contact of the modified zeolite is improved, inorganic fluoride is adsorbed and removed, and harm is reduced; and on the basis of ensuring that the sewage discharge water pipe group normally discharges chemical waste liquid containing inorganic fluoride waste without shutdown, the inorganic fluoride is efficiently, comprehensively and sufficiently contacted, adsorbed and removed, and normal production activities in the electronic industry are carried out.

The invention discloses a defluorination agent suitable for defluorination of electronic industrial wastewater as well as a preparation method and a defluorination method of the defluorination agent. The defluorination agent comprises 9-10 wt% of aluminum salt, 0.1-0.2 wt% of ferric salt, 0.6-1.1 wt% of an alkaline regulator and the balance of water, the aluminum salt is selected from one or more of polyaluminum chloride and aluminum sulfate, and the ferric salt is selected from one or more of ferric trichloride, ferric sulfate and polyferric sulfate. The fluorine removal agent provided by the invention can realize that the fluorine concentration of discharged water is lower than 1mg / L through one-stage / two-stage fluorine removal under a low-fluorine, medium-fluorine or high-fluorine water inlet condition, the optimal pH condition of reaction is reduced, the acid-base and agent use cost is saved, and meanwhile, the fluorine removal agent is simple in preparation method and can be applied to large-scale popularization and production.

A bag filter and a bag-type folding filter element thereof are characterized in that a cylinder cover capable of being opened and closed is arranged on a cylinder shell, the bag-type folding filter element and a pressure plate group are detachably arranged in the cylinder shell, the bag-type folding filter element comprises a core pipe, a folding filter material, an outer pipe, an inner pipe and a positioning plate, the folding filter material is arranged on the outer edge of the core pipe in a surrounding manner, and the positioning plate is arranged on the outer edge of the core pipe. An inner pipe at the bottom end of the positioning disc extends into the core pipe and the top cover, the positioning disc is provided with a pipe hole communicated with the inner pipe, a sealing gasket is arranged on the outer edge of the positioning disc, and a hand lifting part avoiding the center of the pipe hole is arranged on the inner edge of the pipe hole, so that the pressing disc group can really extrude the positioning disc and the sealing gasket for airtight positioning; and the bag type folding filter element can filter pollutants with the size of 0.001 mu m or more, so that the bag type folding filter element meets the use requirements of precision electronic industry equipment.

The present invention relates to an ionic liquid grafted epoxy resin for electronic industry and an application thereof, the coulombic action energy of the ionic liquid grafted epoxy resin is greater than or equal to 100 KJ / mol, the resin composition comprises the ionic liquid grafted epoxy resin and a filler, the interfacial tension between the ionic liquid grafted epoxy resin and the filler is controlled to be less than or equal to 30mN / m. In the resin composition, the ionic liquid is grafted with the epoxy resin, molecular-level combination of the resin and a filler interface is achieved by controlling interfacial tension, the interface thermal resistance can be remarkably reduced, and an efficient and stable heat conduction path is established. Furthermore, when products such as circuit substrates are prepared, the products can have excellent mechanical property, heat resistance, CAF resistance and heat-conducting property at the same time through the synergistic effect.

The present invention discloses a novel circulation mechanism, which includes a bottom plate. A circulation conveying mechanism is arranged on the bottom plate and is used for reciprocatingly circulating and transporting tooling fixtures; a tooling hook component is arranged on the circulation conveying mechanism, and the tooling hook component can drive the tooling fixtures on the circulation conveying mechanism to move; a tooling switching mechanism is symmetrically arranged at both ends of the circulation conveying mechanism and is used for circularly switching the tooling fixtures on the circulation conveying mechanism; and a tooling return flow mechanism is arranged on the bottom plate and is used for providing a power source for the movement of the return flow tooling fixtures on the circulation conveying mechanism. The present invention has the characteristics of simple and reasonable structure, safe and reliable operation, high equipment compactness, low production cost, high production efficiency, etc. The production efficiency is increased to more than 2000 PCS / hour. In addition, the present invention can also be widely applied to the part assembly production in the hardware and electronics industries for popularization and use, and has a broad market prospect.

The invention discloses polyimide which contains rich-CF3 and ester groups, the-CF3 provides low polarity and large free volume, the ester groups provide regularity, and due to the fact that the polyimide has low polarity, large free volume and high regularity, the polyimide can have the advantages of low dielectric constant and low dielectric loss at the same time. And moreover, the absorptivity of the polyimide is improved, the original heat resistance and flexibility of the polyimide are ensured, and the polyimide has excellent comprehensive performance. Meanwhile, the invention also discloses a preparation method of the polyimide and application of the polyimide in the field of electronic industry.

An indium titanium zinc oxide sputtering target includes a sintered body of In, Ti, Zn, and O. The sintered body includes an In2O3 crystal phase and an In2TiO5 crystal phase. The atomic content of In is 63 at.% or more, the atomic content of Ti is 10 at.% or more and 30 at.% or less, and the atomic content of Zn is 2 at.% or more, based on the total atomic content of In, Ti, and Zn being 100 at.%. A film sputtered from the sputtering target and a method of manufacturing the sputtering target are also provided. The sputtering target and the film sputtered therefrom have a high optical refractive index, which meets the requirements of the optical and electronic industries.

The present invention belongs to the technical field of core electronic industries and relates to a luminescent body competition ratio type double antibody sandwich immunosensor for the same co-reactant. It includes a sensing electrode, a second antibody bioconjugate, and a luminescent body; a first antibody and a first catalytic component are attached to the surface of the sensing electrode, and the second antibody bioconjugate is formed by covalently connecting a second catalytic component and a second antibody; both the first antibody and the second antibody can specifically bind to the antigen to be detected, so that the second antibody bioconjugate can be connected to the sensing electrode through the specific binding of the first antibody and the second antibody to the antigen to be detected; both the first catalytic component and the second catalytic component are composites of gold nanoparticles and reduced graphene oxide, the average particle size of the gold nanoparticles in the first catalytic component is 12-14 nm, and the average particle size of the gold nanoparticles in the second catalytic component is 3.3-3.5 nm; the luminescent body is Ru(bpy)3 2+ .

This invention relates to a natural fiber reinforced composite material sheet and its manufacturing method, applicable to the automotive, drone, architectural decoration, and consumer electronics industries. The sheet uses natural fiber fabrics such as flax, hemp, jute, sisal, or bamboo fiber as the reinforcing layer, which is cured with a resin matrix. The reinforcing layer can consist of 1 to 10 layers of natural fiber fabric, and plain weave, twill weave, satin weave, or multi-axial weave can be used as needed to obtain good tensile, bending, and interlayer bonding properties. This invention improves fiber impregnation uniformity and reduces moisture absorption through resin system modification, fiber surface treatment, and vacuum-assisted curing, overcoming the shortcomings of natural fiber composite materials in terms of interfacial bonding, dimensional stability, and process consistency. The resulting sheet is lightweight, has high damping, good electromagnetic wave transmission, and is environmentally friendly and low-carbon, and can be used in battery protection panels, drone arm tubes, sound insulation panels, and automotive interior cladding.

The invention discloses a cloud control method, system and device for feeding equipment and a medium. Through full-process control of data uploading, cloud storage and data execution, rapid issuing and adaptation of the parameter instruction of the feeding equipment are realized, compared with a traditional scheme, the scheme does not need to re-debug the mechanical structure of the equipment for different materials, rapid switching can be carried out through a universal data compression format packet transmitted by the cloud to adapt to different types of materials, and the efficiency is improved. The method has the advantages of high equipment flexibility, high model changing efficiency and strong visual identification robustness, and is suitable for small-batch and multi-variety production requirements in the electronic industry.

The invention discloses a thermosetting insulating thin-coating encapsulating material for the electronic industry, and belongs to the technical field of insulating encapsulating materials, a modified curing agent in the raw materials of the encapsulating material is prepared from furan derivatives containing siloxy and maleic anhydride through Diels-Alder reaction; the accelerator is an isocyanate modified imidazole compound, the modified curing agent and the accelerator can be stably stored at normal temperature, acid anhydride and imidazole groups can be protected at normal temperature, the modified curing agent and the accelerator do not need to be prepared at present, the applicability is good, and the cost is low. Imidazole, isocyanate and anhydride compounds capable of participating in curing are formed through reverse reaction and decomposition in the high-temperature curing process and act together with tris (hydroxymethyl) aminomethane, multiple curing reactions are carried out synchronously, the curing process is promoted synergistically, and the curing speed is increased.

The invention belongs to the technical field of preparation of precise nickel-based conductor materials for the electronic industry, and discloses a low-carbon, environment-friendly and efficient process for removing burrs of precise nickel-based conductor materials for the electronic industry, and the process specifically comprises the following steps: washing and grinding coarse-particle white corundum water, washing and grinding fine-particle white corundum water, cleaning white corundum powder on the surface of a conductor material, and drying. The low-carbon environment-friendly high-efficiency cleaning precision nickel-based conductor material for the electronic industry is good in surface quality, high in product percent of pass, low in cost, free of environmental pollution and wide in application prospect.

The utility model discloses a carrier separating structure for the electronic industry, which comprises a base, the top of the base is provided with a placing table, the upper surface of the placing table is provided with a placing groove for accommodating a mobile phone screen assembly, and a terminal on a flexible circuit board in the mobile phone screen assembly to be detected is placed in a clamping groove, so that the mobile phone screen assembly to be detected can be separated from the mobile phone screen assembly. The mobile phone screen assembly is placed in the placing groove, and the mobile station is controlled to move to drive the terminal of the flexible circuit board placed in the clamping groove to move and be inserted into the wiring terminal, so that the terminal of the flexible circuit board does not need to be manually connected with the wiring terminal on the detection assembly by a worker, the working intensity of the worker is reduced, and the working efficiency is improved. And by controlling the position of the push rod relative to the placement table to be fixed and rotating the placement table, a ball at the bottom end of a connecting column can rotate in a rolling groove in the top of a fixing column, the placement table can be driven to rotate in multiple directions, and the mobile phone screen assembly can be conveniently observed in multiple directions.

1. Name of the product in this design: Ultraviolet sterilizer. 2. Application of this design: It is used for sterilization of water supply systems in municipal, electronic industry, ultrapure water, food, beverage, chemical and pharmaceutical industries. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a precision part concentric circle parameter measurement method based on machine vision in the technical field of machine vision, which comprises the following steps of: performing multi-stage image preprocessing on an acquired image, enhancing circle contour features in a precision part, eliminating background interference, performing target circle detection and verification on the preprocessed image, and performing precision part concentric circle parameter measurement. According to the invention, the method can be applied to the application fields of industrial manufacturing quality inspection, automatic production lines, 3C electronic industry and the like, and can be applied to the fields of industrial manufacturing quality inspection, automatic production lines, 3C electronic industry and the like. Concentric circle parameters of the precision parts are measured, non-contact measurement of roundness and coaxiality of the concentric circles of the precision parts is achieved, and the precision can reach + / -0.005 mm.

The invention discloses a composite metal soldering lug and a preparation method and application thereof, and belongs to the technical field of electronic industry welding. The preparation method of the composite metal soldering lug comprises the following steps: S1, preparing high-activity metal slurry, wherein the high-activity metal slurry comprises an active metal precursor, metal powder and an organic carrier; wherein the high-activity metal slurry comprises the following materials in percentage by mass: 1-50% of an active metal precursor, 1-50% of metal powder and 1-20% of an organic carrier; s2, uniformly coating the high-activity metal slurry on the surface of the metal base material; and S3, the metal base material coated with the high-activity metal slurry is subjected to post-treatment, and the composite metal soldering lug with the pre-sintered soldering layer on the surface is obtained. According to the method, the presintered welding layer of the composite metal soldering lug is formed through the high-activity metal slurry, the preparation efficiency is improved, good sintering activity can be kept, and then chips and devices packaged by the composite metal soldering lug are endowed with excellent performance and service reliability.

The application discloses an air purification system for electronic industrial plants, and relates to the technical field of air purification.The system collects pollution characteristic data in real time through a sensor group, obtains an air particle data group and a purification efficiency data group through data processing, constructs a nanometer pollution disturbance index nan based on the air particle data group to evaluate air cleanliness, and when nanometer pollution is detected, constructs a photocatalytic reaction efficiency index npc based on the purification efficiency data group, fuses the nanometer pollution disturbance index nan to form a purification collapse risk index Rall to evaluate photocatalytic cleaning capacity, dynamically adjusts the operation strategy of an ultraviolet light source and a fan according to the evaluation result, and realizes hierarchical alarm and operation information interaction through a man-machine interface and an audible and visual alarm, and archives to form a closed-loop database.The system can realize real-time monitoring, dynamic purification and risk early warning of air quality of electronic industrial plants, improve air purification efficiency and stability, reduce energy consumption and has traceability.

The invention belongs to the technical field of high polymer materials, and discloses a method for preparing an intrinsic black material from epoxy resin modified polyimide prepared from a bio-based material. Bio-based furfural and eugenol are used as monomers to synthesize a diphenol monomer, and then the diphenol monomer is epoxidized to prepare an epoxy monomer. And finally, adding the black epoxy resin into a commercial PAA acid solution prepared from ODA and BPDA for polycondensation to obtain an epoxy modified polyamide acid solution, and preparing the black epoxy resin / polyimide composite material by a thermal method. The epoxy monomer with high absorbance is introduced, the black composite material can be prepared only by adding a small amount, and the method is simple and efficient. The prepared black epoxy resin / polyimide composite material is excellent in shading performance and heat resistance and has wide application value in the fields of electronic industry, aerospace, instrument communication and the like.

This invention relates to a self-oscillating closed-loop voltage regulator circuit, comprising a self-oscillating circuit, a primary power supply undervoltage indicator circuit, a secondary power supply undervoltage indicator circuit, a key valid indicator circuit, a power amplifier circuit, and a boost control circuit. The self-oscillating circuit outputs a fixed-frequency reference square wave signal. Undervoltage, overvoltage, and key valid indicator signals are passed through an AND gate to output a variable-frequency square wave signal. This variable-frequency square wave signal is then passed through a complementary pull-up circuit to increase the driving capability. The complementary output variable-frequency square wave controls the boost circuit. When the battery is low or the secondary power supply is undervoltage, the output frequency of the self-oscillating circuit controls the switching of the boost circuit to achieve rapid voltage boost. When the battery and secondary power supply voltages are normal, the boost control circuit is shut down. This effectively ensures stable operation under normal control conditions and is particularly suitable for the automotive electronics industry.

The invention provides high-purity low-free-phenol electronic-grade phenolic resin and a preparation method thereof, and belongs to the technical field of high polymer material preparation. The raw materials comprise phenol, formaldehyde, oxalic acid, epoxy resin, a reinforcing agent and distilled water, and the raw materials are mixed according to a specific weight ratio. The preparation method comprises the steps of raw material mixing and normal-pressure reflux reaction, standing water separation and washing detection, vacuum dehydration, additive mixing and cooling molding, and by controlling process parameters such as temperature, time and vacuum degree of each step, the prepared electronic-grade phenolic resin has the solid content of 66%-69%, the free phenol content of less than or equal to 1% and the conductivity of less than 50 microseconds / cm. According to the invention, the problems of low purity, high free phenol monomer content and high impurity content of the existing electronic grade phenolic resin are solved, the prepared electronic grade phenolic resin has excellent high temperature resistance and insulation performance and low free phenol content, the pollution to the environment can be effectively reduced, and the requirement of the electronic industry on the high-purity phenolic resin is met.