101results about How to "Good process compatibility" patented technology

The invention discloses a reversible metal 4D printing method based on hydrogel reversible deformation and a metal part, and belongs to the field of metal additive manufacturing. The method comprises the following steps: firstly, constructing a three-dimensional model comprising a hydrogel driving layer and a metal blank layer; respectively preparing hydrogel light-cured ink and metal or precursor slurry thereof; printing the two layers of materials sequentially or alternately by adopting a photocuring printer to obtain a composite green body; the hydrogel layer is dehydrated and shrunk through drying, the component is driven to generate preset shape deformation, the hydrogel layer absorbs water and expands through soaking, and reversible recovery of the shape of the component is achieved; and degreasing, selective reduction and sintering heat treatment are conducted on the component, and the compact final metal component is obtained. According to the invention, the independent hydrogel layer is used as a deformation driver, the dependence on the intrinsic phase change characteristic of a metal material is avoided, the material universality is extremely high, the method can be widely applied to 4D printing of various materials including refractory metal and high-reflection metal, and reversible control of shape change is realized.

The invention discloses an anion exchange membrane electrode and a preparation method and application thereof, and belongs to the technical field of new energy material and catalytic electrode preparation, the method comprises the following steps: S1, preparing an anode catalyst slurry comprising a hydrophobic covalent organic framework material, an anode catalyst, an anion exchange ionomer and a solvent; s2, preparing a cathode catalyst slurry of which the components comprise a cathode catalyst, an anion exchange ionomer and a solvent; and S3, respectively spraying or coating the anode catalyst slurry and the cathode catalyst slurry on two side surfaces of an anion exchange membrane or a gas diffusion layer, and carrying out heat treatment to obtain the anion exchange membrane electrode. The method provided by the invention can solve the problems of large gas-liquid-ion three-phase mass transfer resistance, easy shielding of active catalytic sites by ionomers and unbalanced water management in the membrane electrode assembly in the existing AEMWE device.

This invention relates to the field of semiconductor optoelectronic device technology, specifically to a method and application for reducing the contact resistance of high-Al-content n-AlGaN materials in device manufacturing processes. The method involves surface atom adsorption and annealing of the n-AlGaN layer under a protective gas atmosphere; the atoms are Si and N atoms. This method significantly increases the carrier concentration on the material surface, thereby contributing to excellent ohmic contact performance and reducing the material's contact resistivity. It solves the problem of difficult ohmic contact preparation for high-Al-content n-AlGaN materials, especially the difficulty in forming ohmic contacts after etching. The method is simple and reproducible, effectively avoiding the complexity and instability of existing processes such as acid / alkali corrosion or high-temperature annealing. It ensures large-scale mass production and has no adverse effects on subsequent device fabrication, exhibiting good process compatibility.

This invention discloses a netlist-level automated ESD inspection method compatible with multiple processes, belonging to the field of electronic design automation technology. The method includes acquiring the netlist file of the circuit under test, loading an ESD constraint configuration file independent of the netlist file, defining the logical types of the physical networks in the netlist file according to the ESD constraint rule set, classifying them into network types including at least power networks, ground networks, input / output networks, and internal signal networks, performing at least one ESD protection structure check on the circuit under test based on the network types and device pin connections, summarizing the results of each check, and outputting an ESD inspection report. This invention decouples ESD inspection rules from process parameters, enabling replaceable configuration files and improving process portability; it also possesses multi-power domain identification and automatic derivation capabilities for multi-level protection networks, enhancing adaptability to complex designs and inspection accuracy.

The invention relates to the technical field of papermaking, and provides a composite fiber material and a preparation method thereof.The composite fiber material comprises a reinforcing layer and a functional layer which are arranged in a stacked mode; the reinforcing layer comprises matrix-fibril type composite fibers, and the matrix-fibril type composite fibers comprise synthetic fibrils and matrix fibers covering at least part of the surfaces of the synthetic fibrils; the functional layer comprises a skin-core type composite fiber, and the skin-core type composite fiber comprises a core layer and a functional skin layer wrapping at least part of the surface of the core layer. According to the invention, the interface bonding and load transmission efficiency of synthetic fibrils and a cellulose network is improved on the enhancement layer, and a high-strength bearing skeleton is constructed; the functional layer limits functional components on the surfaces of the fibers to form a stable functional skin layer, so that the functional components are prevented from forming a weak boundary layer among the fibers and weakening fiber bonding; the two layers cooperate to realize that the paper-based material keeps high strength and reduces the interlayer stripping risk while obtaining the target surface function.

The invention discloses a piezoelectric MEMS loudspeaker based on a folding ring between movable and fixed parts and application thereof, and belongs to the technical field of loudspeakers, the piezoelectric MEMS loudspeaker comprises a piezoelectric actuating assembly, a fixed assembly and a folding ring; the piezoelectric actuating assembly comprises a piezoelectric actuating composite layer, the piezoelectric actuating composite layer at least comprises a piezoelectric material layer, and the piezoelectric actuating composite layer generates mechanical displacement by applying voltage to drive the piezoelectric actuating assembly to vibrate so as to generate sound pressure; the fixing component can be a single structural component or a component with a plurality of structural components; the fixing assembly can be used for fixedly supporting the fixed supporting part of the piezoelectric actuating assembly, so that the non-fixed supporting part of the piezoelectric actuating assembly can freely move or vibrate; according to the invention, through the innovative design based on the folding ring between the moving part and the fixed part, the low-frequency vibration displacement of the vibrating diaphragm is remarkably improved, the problem that the low-frequency sound pressure of a traditional piezoelectric MEMS loudspeaker is insufficient is effectively solved, and the vibrating diaphragm can push air with a larger volume in a low-frequency band, so that a fuller low-frequency sound effect is obtained.

The application belongs to the technical field of lithium batteries, and discloses a gel electrolyte taking a functionalized two-dimensional MXene material as a dispersant as well as a preparation method and application of the gel electrolyte. The gel electrolyte comprises a functionalized MXene material and a basic electrolyte; the functionalized MXene material is obtained by the following method: 1) treating a MAX phase material with a solution containing HCl and LiF, intercalating, peeling off, and then reacting with a diazonium salt solution to obtain a sulfonic acid functionalized MXene material. The application further discloses a preparation method of the gel electrolyte. The application reconstructs a lithium ion solvation structure, reduces a desolvation energy barrier, homogenizes a bulk phase electric field and ion flow, cooperatively induces formation of a stable SEI interface rich in inorganic species, significantly inhibits lithium dendrite growth, and improves interface kinetic stability. The method is simple and low in cost. The electrolyte is used in a lithium metal battery and exhibits excellent cycle performance.

The invention provides a composite material, a preparation method thereof and conductive slurry, and belongs to the technical field of conductive materials. The preparation method comprises the steps that a base material is pretreated, an activated base material is obtained, and the base material comprises copper powder or nickel powder; and an atomic layer deposition technology is adopted, a coating layer is deposited on the surface of the activated base material, the composite material is obtained, and the coating layer comprises a silver layer. The composite material prepared by the invention has the characteristics of uniform and compact coating, controllable thickness, strong interface bonding force, strong oxidation resistance, stable performance and the like, and the performance of the conductive slurry can be remarkably improved.

The invention discloses corrosion aluminum powder and a preparation method and application thereof, and the preparation method comprises the following steps: S1, carrying out plasma passivation treatment on aluminum powder to obtain surface modified aluminum powder with an amorphous aluminum oxide layer; and S2, carrying out surface micro-corrosion on the surface modified aluminum powder, and then drying and grading to obtain the corroded aluminum powder. The method comprises the following steps: forming an amorphous aluminum oxide layer on the surface of aluminum powder; and then micro-corrosion is carried out on the amorphous aluminum oxide layer, a rich pore structure is formed on the amorphous aluminum oxide layer, and after corrosion is completed, the amorphous aluminum oxide layer can be automatically formed on the corrosion surface again. The surface of the obtained corrosion aluminum powder is completely wrapped by the amorphous aluminum oxide layer, so that the leakage current can be greatly reduced, and the electrochemical stability of the anode foil is greatly improved; the porous carbon has certain roughness and rich pore structures, and the specific surface area and the specific volume are greatly increased; the micro-corrosion has no negative influence on the mechanical strength of the aluminum powder, and ensures that no micro-crack appears on the surface of the anode foil.

The invention discloses a slice laser based on a topological structure dodging layer. The slice laser comprises a pumping system, a pumping light injection module and a composite dodging waveguide structure, pumping light generated by the pumping system enters the composite dodging waveguide structure through the pumping light injection module; the front end face of the composite dodging waveguide structure is plated with a pumping light wavelength high-reflective film and a laser wavelength antireflection film, and the rear end face of the composite dodging waveguide structure is plated with a pumping source wavelength and laser wavelength high-reflective film; the composite dodging waveguide structure comprises a slice gain medium, a topological structure dodging layer and a middle refractive index layer which are sequentially arranged from the front end face to the rear end face. The topological structure dodging layer is composed of a low-refractive-index material layer and a high-refractive-index material topological graph arranged on the low-refractive-index material layer; and the pump light injection module is fixed above the high refractive index material of the middle refractive index layer or the topological structure dodging layer. Pumping uniformity is improved fundamentally, high-order mode suppression and efficient fundamental mode extraction are facilitated, and output power and light beam quality are improved at the same time.

The utility model relates to the technical field of carbon brush production, in particular to a carbon brush oiling tool which is provided with a horizontal moving unit, a vertical moving unit is arranged on the horizontal moving unit, an oiling unit is arranged on the vertical moving unit, the oiling unit comprises an oil pipe, an oil injection valve and an oiling brush, and an oiling position adjusting unit is arranged on the vertical moving unit. Through linkage control of the horizontal moving unit and the vertical moving unit, it is ensured that the oiling brush can be accurately positioned to the starting point of the carbon brush milling arc face, and continuous and uniform covering of an oil film is achieved through the constant-speed pulling-up action from bottom to top. The oil injection valve and the lifting speed are synchronously adjusted, the oil quantity and thickness can be accurately controlled, and the problem that an oil film is too thick or too thin in traditional manual operation is solved; the oiling position adjusting unit is integrated on the vertical moving unit, so that transverse deviation is supported, carbon brushes of different sizes and radians are adapted, missing coating or uneven coating caused by workpiece tolerance is avoided, and the process compatibility is remarkably improved.

The application provides a coiled tube heat exchanger using spherical clamping strips to fix tube bundles, and belongs to the technical field of heat exchange equipment, and comprises a central cylinder and a plurality of clamping strips with spherical protrusions arranged on the outer wall of the central cylinder. The upper surface of the clamping strip is provided with a spherical protrusion structure, and adjacent spherical protrusions constitute a heat exchange tube positioning element. The spacing between the spherical structures is optimized to match the arrangement of the tube bundles, and the outer surface of the central cylinder is wound with heat exchange tubes. The clamping strip with the spherical protrusion adopts a reverse stamping process in the manufacturing process, so that the processing surface is located on the non-contact side of the heat exchange tube, effectively avoiding direct friction damage of the processing defects to the tube wall. The spherical streamline structure reduces the turbulence intensity when the shell side fluid flows around, effectively reduces the shell side pressure drop while ensuring the positioning accuracy of the heat exchange tube, and improves the heat transfer efficiency of the heat exchanger. The clamping strip with the spherical protrusion omits the independent welding area required by the traditional tube clamp, thereby reducing the material consumption of the clamping strip.

The application provides a deep trench field effect transistor and a preparation method thereof, which comprises the following steps: forming a P-type layer and an N-type layer in an N-type substrate; forming a gate trench and a terminal trench; forming an N-type source region by ion implantation; forming a gate oxide layer in the trench; forming a first polysilicon layer, a thick oxide layer and a second polysilicon layer in the trench; depositing a dielectric layer; forming a drain contact region, a source contact region, a gate contact region and a terminal contact region; forming a source electrode, a gate electrode and a drain electrode, wherein the source electrode is connected with the N-type source region and the terminal contact region simultaneously. The source electrode, the gate electrode and the drain electrode can be attached to a heat dissipation substrate simultaneously, the heat dissipation path is greatly optimized, and the source path inductance is reduced; the source contact region of the application is arranged in the terminal region, and the source contact region is realized by directly etching the dielectric layer and the substrate below the dielectric layer, the process controllability is high, the steps are simple, and the etching process of the source contact region has high stability.

The application relates to the technical field of semiconductor bridge electrostatic discharge protection and current protection, and discloses an electrostatic discharge and current protection circuit of a semiconductor bridge, which comprises an ESD protection circuit, a current protection circuit and an NMOS connected in parallel, the ESD protection circuit comprises a bidirectional transient suppression diode and a capacitor connected in parallel, the bidirectional transient suppression diode clamps a transient high voltage by breakdown conduction, the voltage is limited in a safe range, the capacitor reduces a voltage rising rate and suppresses overshoot by shunting and absorbing a transient current, the NMOS provides a low-resistance discharge path, and the voltage and current impact applied to the semiconductor bridge are reduced; the current protection circuit comprises a bidirectional rectifier circuit and a detection circuit; and the NMOS is connected between the detection circuits. The application can realize ESD protection and current protection of the semiconductor bridge, prevents current from damaging the structure, and guarantees the safety of the semiconductor bridge working in an electromagnetic and ESD environment.

The utility model relates to the technical field of linear cutting, in particular to a bidirectional clamping and fixing device for linear cutting. The top of the mounting plate is fixed to a rack, the clamping parts are arranged on the two sides of the mounting plate in a mirror image mode with the central axis of the mounting plate as the reference, each clamping part comprises an upper supporting rod, a middle supporting rod and a lower supporting rod, and the two ends of the upper supporting rod, the two ends of the middle supporting rod and the two ends of the lower supporting rod are movably installed on corner-shaped supporting arms through shafts. The upper ends of the supporting arms are movably installed on the upper supporting rods, the corner points of the supporting arms are movably installed on the middle supporting rods, the lower ends of the supporting arms are movably installed on the lower supporting rods, and pressing plates used for clamping are arranged on the inner sides of the lower supporting rods. An installation plate is adopted as a base body, the top of the installation plate is fixed to a rack, clamping parts are symmetrically arranged on the two sides of the central axis of the bottom of the installation plate, each clamping part is composed of an upper supporting rod, a middle supporting rod and a lower supporting rod, and the two ends of the upper supporting rod, the middle supporting rod and the lower supporting rod are movably connected with corner-shaped supporting arms through shafts to form a four-connecting-rod linkage mechanism, and bidirectional symmetrical clamping is achieved.

The application discloses a MEMS gas sensor based on a weakly coupled AlN thin film resonator and belongs to the technical field of microelectronic mechanical systems. The gas sensor comprises a glass base, the front surface of the glass base is provided with a plurality of groups of capacitor plates, an AlN thin film resonator array is suspended on the glass base through the capacitor plates, the AlN thin film resonator array is composed of at least four resonator units, and the resonator units are connected through coupling beams. The MEMS gas sensor is configured to realize synchronous quantitative measurement of a plurality of gas concentrations by detecting the change of the vibration amplitude ratio of each resonator unit. The application has the advantages of multi-parameter synchronous detection, strong anti-interference capability, high sensitivity and good stability and is suitable for gas sensing measurement in a complex environment.

The invention relates to the technical field of cosmetic preparations, and discloses a composition containing succinyl glycan and application of the composition to regulation and control of the repetition distance of a liquid crystal lamellar phase, the composition comprises a liquid crystal component and an effective amount of succinyl glycan, wherein the stratified phase repetition distance of liquid crystals in the composition can be effectively adjusted by adding the succinyl glycan, and the thermal stability of the composition is improved; small-angle X-ray scattering (SAXS) proves that the addition of the succinyl glycan enables the repetition distance of the lamellar phase of the liquid crystal to generate a measurable change of 6.2% to 19.4%; the invention provides a novel method for accurately regulating and controlling the liquid crystal structure of the cosmetic from the nanoscale, and the obtained composition has better stability, moisture retention and skin feeling in use.

The invention discloses a passivation material, the structural formula of the passivation material is shown in the specification, X is independently selected from F, Cl, Br or I, and Y is independently selected from-PO3H2,-SO4H,-COOH,-OH or-SH. The passivation material and uncoordinated Pb < + > on the surface of the perovskite can form a powerful double-site coordination effect, the interface defect state density is remarkably reduced, and non-radiative recombination is inhibited. Meanwhile, the interface energy band structure is effectively regulated and controlled, the Fermi level is moved upwards, the surface n-type characteristic is enhanced, and therefore energy level alignment is optimized, the electron extraction potential barrier is reduced, and the charge transmission efficiency is improved.

This invention discloses an industrial production method for cement clinker that co-processes heavy metal-containing waste, comprising: raw meal preparation: raw meal is prepared according to the following proportions by weight: 84-87 wt% calcareous raw materials, 6.0-7.2 wt% clayey raw materials, 4.8-5.8 wt% corrective raw materials, and 2.0-4.5 wt% heavy metal-containing waste; addition of composite synergist: a heavy metal adsorption-mineralization composite synergist is added to the raw meal; pre-decomposition: the homogenized raw meal is preheated by a multi-stage cyclone preheater and then enters a decomposition furnace for carbonate decomposition; clinker calcination: the decomposed raw meal enters a rotary kiln and is calcined at 1350-1450℃ to form clinker; and rapid cooling of clinker: the calcined clinker is rapidly cooled to room temperature by a grate cooler to obtain finished cement clinker. This invention can achieve a total solidification rate of heavy metals in clinker of 93%, and increase the retention of Pb, Cd and Zn by 13.9 times, 59.1% and 11.5% respectively, and increase the 28-day compressive strength to 61.8 MPa.

The present application relates to the technical field of metal precision forming, and particularly relates to a copper micro-channel liquid cooling radiator and a liquid forming manufacturing method thereof, which comprises the following steps: S1, a soluble ceramic core with a micro-channel negative structure is prepared by using a template method, and the surface of the core is pretreated to reduce the wetting angle; S2, the pretreated core and an outer mold sprayed with a release agent are assembled to form a casting cavity; S3, copper liquid subjected to flowability improvement treatment is smelted and cast in a vacuum or a protective atmosphere; S4, directional solidification of the casting is guided by using multi-section induction heating combined with online temperature control; and S5, the core is removed by chemical dissolution. Through the synergy of bidirectional wetting control, a template method soluble core and directional solidification technology, the present application realizes high-quality and low-cost batch manufacturing of a complex three-dimensional micro-channel copper radiator, and the prepared radiator has a complete micro-channel structure and high internal density, and is suitable for high-power heat dissipation scenes in the fields of high-performance computing, power electronics, new energy and the like.

The embodiment of the invention relates to the technical field of communication, and discloses an antenna unit and communication equipment. The antenna unit comprises a substrate, a grounding layer, a radiator and a coupling unit. The grounding layer is arranged on the first surface of the substrate, the radiator is arranged on the second surface of the substrate, the radiator is provided with a feed structure, and the first surface and the second surface are oppositely arranged. The coupling unit is arranged on the second surface of the substrate, the coupling unit and the radiator are arranged at an interval, and the coupling unit is coupled with the grounding layer through the dielectric layer of the substrate. The grounding layer, the radiator and the coupling unit are integrated on the substrate to form an integrated structure. Through the mode, the grounding layer, the radiator and the coupling unit are integrated on the substrate to form an integrated structure by adopting a printed circuit board process, so that the production cost can be reduced, the process compatibility can be improved, the working frequency band can be expanded, the miniaturization design can be realized, and the integrated requirements of large-scale commercial deployment and various application scenes can be met.

The application discloses a method for detecting self-interstitial atom type dislocations in heavily arsenic-doped substrates. The method is based on the fact that self-interstitial silicon atoms in heavily arsenic-doped substrates have a thermal activation threshold effect during high-temperature epitaxy. When the effective thermal treatment time of epitaxy reaches a critical aggregation time τ c , the dispersed point defect state self-interstitial atoms can be excited and aggregated into an extended dislocation state that can be detected. The method comprises the following steps: pretreating the heavily arsenic-doped substrate; performing epitaxial growth under process conditions that satisfy the thermal activation threshold, so that the latent self-interstitial atom defects are made dominant; identifying characteristic signals by using SP1 surface scattering scanning; and optionally performing microscope observation, chemical corrosion verification and substrate trace detection. The application realizes effective detection of latent self-interstitial atom type dislocations in heavily arsenic-doped substrates, provides a quantifiable process window, and has the advantages of high detection sensitivity, good reliability and easy industrial integration.

The application discloses a copper-clad plate based on montmorillonite glass fiber and a preparation method thereof, and belongs to the technical field of copper-clad plates. The copper-clad plate is mainly prepared by replacing traditional glass fiber cloth with montmorillonite glass fiber cloth with a surface graphene film, so that the copper-clad plate has high conductivity, high thermal conductivity and mechanical strength, and is suitable for high-frequency communication, high-power electronics and other fields. The preparation process is simple, compatible with the existing production line, and has significant technical advantages and industrial application prospects.

This invention discloses a high-safety, high-energy-density chalcogenide all-solid-state battery and its preparation method, belonging to the field of all-solid-state battery technology. The battery includes a positive electrode, a chalcogenide solid electrolyte layer, and... SnF2‑In The phase change alloy thermal response layer and negative electrode have a thermal response layer thickness of <5μm, coated only on the outer periphery of the battery and the interface between adjacent batteries. Its operating initiation temperature is 50-100℃ higher than the high-temperature, high-pressure sintering temperature of 570℃. This invention achieves a 99.2% volumetric energy density retention rate by precisely defining the coating area, thickness, and temperature matching relationship of the thermal response layer. The early expansion rate of the thermal response layer after sintering is controlled at 4.8%, the probability of preventing thermal runaway chain propagation between adjacent batteries reaches 95.0%, and the thermal conductivity is reduced by 83% compared to structures without a barrier layer. While ensuring composite safety functions, it does not compromise the core commercial advantages of all-solid-state batteries, and has broad industrialization prospects.

This invention belongs to the field of optoelectronic technology, specifically relating to a method for fabricating a controllable crystallization micron-scale perovskite light-emitting device based on solution pretreatment. The method includes the following steps: Step 1: Obtaining a patterned microporous substrate; Step 2: Pre-wetting and seed layer construction; Step 3: Deposition of the main perovskite layer; Step 4: Slow-release controllable crystallization; The spin-coated wet film is placed in a vapor atmosphere of a good solvent for treatment, followed by thermal annealing to form a perovskite thin film within the patterned micropores; Step 5: Fabrication of a controllable crystallization micron-scale perovskite light-emitting device based on solution pretreatment. This invention, using pre-wetting, seed guidance, slow-release crystallization, and vapor annealing on a patterned microporous substrate, achieves precise control over the entire process of film nucleation and growth kinetics within the confined space of the micropores, thereby achieving high-quality, uniform fabrication of perovskite thin films within micron-scale micropores, and ultimately obtaining a high-performance, highly uniform microarray perovskite light-emitting device.

The application relates to the technical field of textile printing and dyeing, and discloses a waterless printing and dyeing process intelligent control method and system.The method comprises the following steps: collecting dye dispersion and fabric fiber density data in a waterless medium, and generating an initial concentration distribution map; inputting a convolutional neural network to identify concentration instability regions and local deviation values; if the deviation exceeds a preset threshold, iteratively optimizing dye injection parameters to obtain an optimized concentration distribution map; segmenting the regions and extracting dye penetration path vectors of high fiber density regions; determining regional adsorption adjustment coefficients through a support vector machine; updating the parameters to obtain a dynamic concentration regulation sequence; iteratively optimizing the final uniform coloring distribution through coloring simulation; and extracting quality indicators to optimize process parameters and determine a production compatibility scheme.The application solves the problem of uneven dye dispersion through multi-dimensional data fusion and intelligent algorithm regulation, and improves coloring uniformity, process stability and production compatibility.

This invention discloses a low-dielectric glass material, glass-ceramic, and a method for preparing TGV through-holes for integrated circuit packaging. The glass material is composed of SiO2, B2O3, Al2O3, RO, R2O, and rare earth oxides Gd2O3 / La2O3, satisfying a SiO2 / B2O3 molar ratio of 2.0~3.5 and an Al2O3 / (Gd2O3+La2O3) molar ratio of 1:1~4:1. Through the "mixed base-like effect" and lattice distortion effect generated by the Gd2O3 / La2O3 dual doping, a dielectric constant ≤4.6, dielectric loss ≤0.001, and CTE 32~50 × 10⁻⁶ are achieved. ‑7 / °C. Further heat treatment yields a glass-ceramic containing single-crystal β-CaSiO3 phase, with a flexural strength ≥250 MPa. Based on this, laser-induced modification combined with wet etching is used to form TGV vias with an aspect ratio ≥50:1, followed by pulsed copper plating for filling, and low-temperature sealing with Kovar alloy at 975°C. Slow cooling and compressive stress design suppress bubbles and cracks. This invention solves the problems of signal loss, thermal stress failure, and insufficient mechanical strength in high-frequency packaging, and is suitable for RF connectors, MEMS, and 3D system-level packaging.

This invention belongs to the field of microbial polysaccharide fermentation and processing technology, specifically relating to a liquid sizing agent, its preparation method, and its application. This invention optimizes the fermentation process of *Sphingomonas sphingosine monophosphate* CGMCC No. 9531 to prepare a high-yield, high-viscosity fibrous sizing agent. Then, using vegetable oil and / or mineral oil as the dispersion medium, and in conjunction with a composite emulsifier, a high-concentration liquid sizing agent is prepared. This invention solves the problems of existing sizing agents being only solid powders with poor solubility and difficulty in maintaining high-concentration sizing agents stably in liquid systems. The high-concentration liquid sizing agent of this invention allows for pumping and precise control, meets product performance requirements, can be stably stored for more than 12 months, dissolves quickly, and remains uniformly stable after 72 hours of standing. The fermentation yield is increased by 25% compared to existing processes.

This utility model discloses an upper pressure roller assembly for a paper pressing mechanism based on a roller in carton forming, belonging to the technical field of carton forming equipment components. This utility model includes an upper pressure roller mechanism, which is composed of multiple structures. The upper pressure roller assembly is designed as an integrated composite structure. Relying on the sliding connection between the upper movable wall plate and the first slider, the entire assembly can be quickly adjusted laterally to adapt to different specifications of cardboard, enabling multi-variety production switching without stopping the machine for component replacement. The hinged design of the swing arm bearing pin and connecting rod, combined with the low-friction rotation characteristics of the first bearing, forms a dynamic transmission link. This structural innovation not only achieves synchronous operation of cardboard conveying and pre-crimming, but also improves the equipment's adaptability to complex working conditions through modular design. Especially when handling wide or irregularly shaped cardboard, it can significantly reduce manual adjustment time and improve the flexible production capacity of the production line.

This invention discloses a high-voltage LDMOS device, wherein a first field plate dielectric layer is provided on a first-doped substrate / first-doped epitaxial layer, and only in the second-doped LDMOS device region, the first field plate dielectric layer being a partial LOCOS structure; a first and second-doped drift region is provided below the first field plate dielectric layer in the first-doped substrate / first-doped epitaxial layer; a second and second-doped drift region is provided below the first and second-doped drift regions in the first-doped substrate / first-doped epitaxial layer; a second field plate dielectric layer is provided on the side of the first field plate dielectric layer near the channel, the second field plate dielectric layer being constructed by filling the dielectric layer using a shallow trench isolation process; the device drain is connected to the first and second-doped drift regions and the second and second-doped drift region and the second-doped heavily doped region through a second-doped well implantation. This invention reduces specific on-resistance while ensuring high breakdown voltage, improving process compatibility and device performance.