61169 results about "Electrically conductive" patented technology

This invention discloses a fluorene-based organic small molecule hole transport material and its applications. The general structural formula of the fluorene-based organic small molecule hole transport material is as follows: where n = 1-4, and R represents the hole transport capacity. This fluorene-based organic small molecule hole transport material is used as an undoped hole transport material in perovskite solar cell devices. By introducing dicarboxylic acid groups onto the fluorene-based organic small molecule hole transport material, when used in an inverted perovskite solar cell device, it can form chemical bonds with the hydroxyl groups of the glass conductive substrate, forming a directionally aligned self-assembled layer on the surface of the glass conductive substrate. This effectively improves the charge transport capability at the interface and increases the photoelectric conversion efficiency of the perovskite solar cell device. Furthermore, since this perovskite solar cell device does not contain lithium salts, it exhibits high water and oxygen stability. In addition, the synthesis process of this fluorene-based organic small molecule hole transport material is simple, and the raw materials are inexpensive and readily available, making it highly valuable for practical applications.

The invention belongs to the technical field of aerogel materials, and particularly relates to high-performance antistatic aerogel for 3D printing as well as a preparation method and application thereof. According to the invention, inorganic hollow nanoparticles are selected as a nucleating modifier for in-situ polymerization of aniline monomers in a polyamide solution, so that polyaniline-coated inorganic hollow nanoparticles are uniformly dispersed in polyamide, and the aerogel composite material with polyamide as a continuous phase and polyaniline-coated inorganic hollow nanoparticles as a conductive and reinforced phase is formed. The use of the hollow inorganic nanoparticles avoids the problem that the solid inorganic nanoparticles lose the characteristics of the inorganic nanoparticles due to high specific gravity and high surface energy, and easy agglomeration or adsorption with other substances in the preparation process of the solid inorganic nanoparticles. The inorganic hollow nanoparticles are adopted as a nucleating modifier, so that the problems of agglomeration of solid nanoparticles and dispersion in a polyamide matrix are well solved.

The invention provides a permanent magnet motor and a scroll inverter compressor, and relates to the technical field of scroll compressor design and manufacturing, and the permanent magnet motor comprises a stator iron core and a rotor iron core; the stator core comprises stator teeth and a stator yoke which are uniformly distributed along the circumference, fluid through grooves are formed in the outer side of the stator yoke at the tops of the stator teeth, stator grooves are formed in two adjacent stator teeth and the stator yoke between the two stator teeth, and a plurality of strands of conductive circular enameled wires are embedded in each stator groove; the outer side of the rotor core is composed of linear segments and arcs, air grooves which are evenly distributed are formed in the rotor core, non-uniform magnetic isolation bridges are formed between the air grooves and the linear segments on the outer side of the rotor core, a certain distance is formed between every two adjacent air grooves, parallel magnetic conductive ribs are formed, and permanent magnets with the magnetic field directions changing alternately are embedded in the air grooves. A rivet hole, a lightening hole and a shaft hole are arranged close to the inner side of the rotor core. Therefore, the defined proportionality coefficient Ks is kept in a reasonable range, the power density of the motor can be increased, the cost is reduced, and the efficiency is improved.

The invention belongs to the technical field of polymer preparation, and particularly relates to a curved-surface polyaniline modified 3D printing polyurethane material and application thereof. According to the preparation method, an ice crystal hard template method and a polyether glycol soft template method are combined, so that the microstructure of polyaniline is adjusted, and the curved polyaniline with regular morphology is prepared. The curved-surface arc-shaped structure has a large specific surface area, can form more contact sites with resin when being directly melt-blended with the resin, is beneficial to construction of a conductive path, and is not easy to agglomerate due to the curved-surface structure. The polyaniline with the arc-shaped structure is of a three-dimensional space structure and is directly blended with the resin to form a randomly arranged conductive network structure, so that the composite material is not easy to break when being impacted, and can be better embedded between the resin to form a stress transfer channel, and a complex three-dimensional network structure is constructed; the mechanical property and the antistatic capability of the product are improved.

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

The utility model relates to the technical field of curtain machines, and discloses a conductive structure of a curtain machine, the curtain machine comprises a curtain guide rail, the conductive structure comprises a conductive strip and a moving body, and the conductive strip is arranged along the length direction of the curtain guide rail; the moving body is movably arranged in the length direction of the curtain guide rail, a conductive contact piece is arranged on the moving body, and the conductive contact piece is configured to abut against the conductive strip under the action of elastic force. In the conductive structure, the conductive contact member always abuts against the conductive strip under the action of the elastic force, and reliable contact and stable conduction between the conductive contact member and the conductive strip can be ensured no matter the conductive strip is uneven, the gap of the assembly structure is large, and the conductive strip is affected by external vibration.

The invention provides an intelligent eddy current nondestructive testing method and system based on a flexible GMR sensor array, and relates to the technical field of nondestructive testing. According to the invention, a GMR sensor array and a micro excitation coil array are integrated on a flexible substrate, and synchronous acquisition under multi-frequency and multi-phase excitation is realized by establishing a probe-workpiece unified space coordinate system and a time synchronization reference; performing temperature drift compensation, attitude correction and gap normalization processing on the original response tensor to generate a corrected response tensor; the intelligent inversion model based on the prior constraint of the electromagnetic field jointly identifies the conductivity, the thickness and the crack parameters, and outputs a defect parameter map and a confidence map; and a detection report containing the position, the size, the depth and the confidence coefficient is generated through spatial clustering and connectivity analysis, so that high-sensitivity and high-reliability nondestructive detection under a complex curved surface structure is realized.

The invention relates to the technical field of fusion reaction devices, and discloses a flexible electrical connection structure and a fusion reaction device, and the flexible electrical connection structure comprises a first installation assembly, a second installation assembly and a connection assembly. The first installation assembly comprises an installation base, a supporting piece and an adjusting base, the supporting piece is connected with the installation base and can move in the first direction relative to the installation base, the adjusting base is connected with the supporting piece and can move in the second direction relative to the supporting piece, and the second direction is perpendicular to the first direction. One end of the connecting assembly is connected with the adjusting seat, the other end of the connecting assembly is separably connected with the second mounting assembly, and the first mounting assembly, the connecting assembly and the second mounting assembly can form a conductive path. Therefore, the position of the connecting assembly can be adjusted through movement of the supporting piece and the adjusting seat. In the installing process or the working process, the position of the connecting assembly can be adjusted in a self-adaptive mode, the overall installing efficiency of the fusion reaction device is improved, and the connecting stability of the connecting assembly and the second installing assembly in the working process is improved.

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

The invention relates to a glass support plate, a preparation method thereof and a packaging structure. The glass carrier plate is used for connecting a chip and a circuit board, the glass carrier plate comprises a substrate, the substrate comprises a through hole penetrating through the substrate along a first direction, the through hole comprises a first sub-through-hole part and a second sub-through-hole part at least located at two ends of the through hole, and a third sub-through-hole part located between the first sub-through-hole part and the second sub-through-hole part, the first direction is perpendicular to the plane where the substrate is located; the middle conductive part is filled in the third sub through hole part; the first seed layer at least partially covers the side wall of the first sub through hole part; the second seed layer at least partially covers the side wall of the second sub through hole part; the first conductive part is filled in the first sub through hole part, and at least part of the first seed layer is located between the side wall of the first sub through hole part and the first conductive part; and the second conductive part is filled in the second sub through hole part, and the second seed layer is at least partially located between the side wall of the second sub through hole part and the second conductive part. The conductive performance and the reliability can be improved at the same time.

The invention discloses a high-bonding-strength flame-retardant composite current collector base film and a preparation method thereof. The high-bonding-strength flame-retardant composite current collector base film is prepared from the following raw materials in parts by weight: 100 parts of PP resin, 1.5 parts of a lubricant, 0.8 part of an antioxidant and 16 parts of reinforced flame-retardant composite particles, the reinforced flame-retardant composite particles are prepared by the following steps: S1, preparing amidated porous carbon microspheres; s2, compounding the amidated porous carbon microspheres with mica powder to prepare a composite carrier; s3, loading a flame retardant to prepare a flame-retardant compound; s4, in-situ grafting of maleic anhydride grafted polypropylene is carried out, and the reinforced flame-retardant composite particles are obtained. By adding the reinforced flame-retardant composite particles into the PP resin, the flame retardance and mechanical strength of the PP-based composite current collector base film and the interface bonding force between the PP base film and the metal conductive layer can be comprehensively improved.

The invention provides a tumor electric field treatment system, an electrode slice temperature detection method and an electrode slice anomaly detection method, the system comprises an electrode slice and an adapter provided with a first controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the first controller is connected with the adapter. The grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. Therefore, the temperature of the electrode plate can be detected by using fewer conductive traces, and whether the electrode plate is abnormal or not can be judged through temperature detection.

A patch panel comprises an exposed raised area or bump behind each patch panel opening that maintains electrical conductivity between the patch panel frame and a housing of a jack while the jack is installed in the opening. During the manufacturing process, this grounding bump can be masked from paint or powder coating so that the bare metal of the bump remains exposed, yielding a raised surface that readily makes conducive contact with the conductive casing of a jack installed in the patch panel opening without the need for an intermediate component that would normally be required to bridge the gap caused by paint or powder coat thickness.

The invention provides an active and passive integrated protection intelligent fuse with a single excitation source. The active and passive integrated protection intelligent fuse comprises a first conducting bar, a signal melt, a second conducting bar, a circuit board and an excitation source, the circuit board is provided with the relay and the excitation source. The relay is connected with an external control unit, the excitation source, the first conducting bar and the second conducting bar. The first conducting bar, the signal melt and the second conducting bar are connected in sequence; an isolating layer is arranged on the relay, and the isolating layer is used for shielding crosstalk of external voltage on the relay; after a plurality of pins of the relay are welded on the circuit board, an insulation processing mode is adopted among the plurality of pins; and in an inspection working condition, the external control unit outputs a first inspection signal to the relay so as to control the relay to be switched into an inspection state, and feeds back the working state of the excitation source to the external control unit.

The invention discloses copper-containing slurry suitable for high-temperature sintering and a preparation method thereof, and the copper-containing slurry comprises the following components in percentage by mass: 10-80% of copper powder, 0-80% of silver powder, 0.2-1% of low-softening-point glass powder, 0-3% of high-softening-point glass, 15-20% of an organic carrier and 0.5-3% of an organic auxiliary agent, the low-softening-point glass powder is of a Pb-Te-Li system, the softening temperature ranges from 250 DEG C to 350 DEG C, and the softening temperature is lower than the decomposition temperature of the organic coating agent on the surface of the copper powder. The preparation method comprises the following steps: adding the components according to the ratio, stirring until the components are uniformly dispersed, grinding and sieving to obtain the copper-containing slurry suitable for high-temperature sintering. According to the prepared copper-containing slurry, the low-softening-point glass powder is adopted as a key component, a liquid-phase protection layer is formed in the high-temperature sintering process, oxidation and diffusion of copper are effectively inhibited, and the oxidation resistance and the conductive stability of the copper-containing slurry are improved. Meanwhile, the slurry has good flowability and printing performance, and can meet the requirements of the photovoltaic industry for efficient and low-cost conductive materials.

Provided herein are methods of performing multiplex detection of ligand binding kinetics. In some embodiments, the methods include contacting ligands with an array of nucleic acid barcoded oscillators disposed on a first surface of a substrate that comprises an electrically conductive coating, applying an AC electric field to the substrate sufficient to induce the nucleic acid barcoded oscillators to oscillate proximal to the first surface of the substrate, and detecting changes in oscillation amplitudes of the nucleic acid barcoded oscillators over a duration to produce sets of ligand binding data. In some embodiments, the methods also include contacting barcode decoding nucleic acids with the array of nucleic acid barcoded oscillators applying an AC electric field to the substrate sufficient to induce the nucleic acid barcoded oscillators to oscillate proximal to the first surface of the substrate, and detecting changes in oscillation amplitudes of the nucleic acid barcoded oscillators over a duration to produce sets of barcode decoding data.

A method and apparatus for the electrochemical polishing of metallic workpieces are proposed, wherein an electrolyte medium containing solid granular particles and a liquid electrolyte is placed in a container and conductively connected to a first electrode, wherein the metallic workpiece is conductively connected to a second electrode and immersed in the electrolyte medium in the container, wherein the electrodes are subjected to an electrical voltage such that the first electrode in contact with the electrolyte medium has a negative voltage and the second electrode in contact with the workpiece has a positive voltage, and wherein the workpiece is moved relative to the majority of solid granular particles of the electrolyte medium in order to polish it electrochemically.The invention provides that the polarity of the electrical voltage applied to the electrodes is temporarily reversed at least once, in particular periodically, during the electrochemical polishing of the workpiece, so that the first electrode in contact with the electrolyte medium temporarily has a positive voltage and the second electrode in contact with the workpiece temporarily has a negative voltage.

The invention provides a tumor electric field treatment system, an electrode slice temperature detection method and an electrode slice anomaly detection method, the system comprises an alternating current signal generator, an electrode slice and a controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the plurality of electrode units are connected with the controller. The grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. Therefore, the temperature of the electrode plate can be detected by using fewer conductive traces, and whether the electrode plate is abnormal or not can be judged through temperature detection.

The invention discloses a broadband wave-absorbing material based on an MAX-phase metasurface structure and an impedance matching optimization method of the broadband wave-absorbing material. The wave-absorbing material comprises an MAX-phase ceramic substrate and periodic metasurface structures which are arranged on the surface of the MAX-phase ceramic substrate in an array mode and composed of conductive resonance units. The resonance units are isolated through gaps, an equivalent R1L1C1 series resonance circuit is formed in an electromagnetic field, and a base body is equivalent to a parallel resistor R2. By establishing an equivalent circuit model and optimizing parameters R1, L1, C1 and R2, impedance matching of the wave-absorbing material in a target frequency band can be regulated and controlled, so that the wave-absorbing material at least has an absorption peak of which the reflection loss is less than-10 dB. According to the optimization method, electromagnetic simulation and circuit simulation are combined, optimized circuit parameters are reversely mapped into structure geometric parameters, material preparation is guided, and accurate design and broadband absorption of the wave absorbing performance are achieved.

The invention discloses a PDU module and a charging device, and relates to the technical field of power distribution, the PDU module comprises a control board, PCBs, a first control group and a first conductive assembly, the PCBs are connected to the control board at intervals, the first control group comprises a plurality of first relays forming an n * n triangular matrix, and the first relays are fixed on the PCBs. The first conductive assembly respectively realizes electrical communication and cross bridging of relays in the same row and in the same column through the first conductive member, the second conductive member and the bridging busbar. According to the scheme, through the triangular matrix layout, the total number of relays is remarkably reduced on the premise that the same control function as a traditional full matrix is achieved; and meanwhile, the relays are integrated on the PCB and are uniformly controlled by the control panel, so that a large number of connectors and wire harnesses are omitted, the module volume, the material cost and the assembly cost are effectively reduced, and a flexible power distribution function is realized.

A device for extracting CO2 from air comprises at least one extraction reactor (12) through which CO2-containing air (L) flows in an adsorption operation, having an adsorption surface; a heating arrangement (40) for heating the at least one extraction reactor (12) at least in the region of its adsorption surface to a temperature above an extraction gas desorption temperature in a heating / desorption operation; and at least one extraction gas storage (48) for storing CO2 desorbed from the at least one extraction reactor (12) in the heating / desorption operation. The extraction reactor (12) comprises at least one substrate with a plurality of flowable cells or flow channels of a porous structure, wherein the adsorption surface is formed on the substrate, and wherein the at least one substrate is electrically conductive and can be heated by applying an electrical voltage.wherein the heating arrangement (40) comprises the at least one substrate and a voltage source (42) for applying an electrical voltage to the at least one substrate.

The invention relates to the technical field of electric connectors, in particular to an electric connector wiring terminal, which comprises a male wiring terminal and a female wiring terminal, and is characterized in that the male wiring terminal comprises a first shell, a plurality of cables are arranged in the first shell, and each cable is composed of an insulating sheath and a cable core; the female wiring terminal comprises a second shell, the second shell and the first shell are coaxially inserted and matched, a plurality of peeling assemblies are arranged in the second shell, the peeling assemblies are in one-to-one correspondence with the end parts of the cable, each peeling assembly comprises a first cutting assembly and a second cutting assembly, the first cutting assembly comprises a first cutting knife and a first conducting strip, and the second cutting assembly comprises a second cutting knife and a second conducting strip. The second cutting assembly comprises a second cutting knife and a second conducting strip; the second shell is provided with a driving assembly, the driving assembly can enable the first cutting knife and the second cutting knife to rotate in the direction away from the axis of the second shell, so that an insulating sheath at the end of the cable is stripped off from the cable core, meanwhile, the first conducting strip and the second conducting strip make contact with the cable core, and the conducting stability is improved.

The invention discloses a preparation method of a cellulose acetate / thermoplastic polyurethane / polypyrrole composite conductive nanofiber aerogel composite pressure sensing material. The preparation method comprises the following steps: (1) preparing a cellulose acetate and thermoplastic polyurethane spinning solution; (2) preparing a cellulose acetate / thermoplastic polyurethane composite nanofiber membrane; (3) preparing cellulose acetate / thermoplastic polyurethane short nano dispersion liquid; (4) preparing a cellulose acetate / thermoplastic polyurethane / polypyrrole polymerization solution; and (5) preparing the cellulose acetate / thermoplastic polyurethane / polypyrrole composite conductive nanofiber aerogel. According to the preparation method, a high-temperature thermal annealing process is not needed, and the prepared nanofiber composite aerogel has high conductivity, ultralow volume density, high compression deformation performance and high pressure resistance sensing sensitivity.

Various embodiments provide an antenna assembly and associated systems, devices, and methods. The antenna assembly may include two or more antennas, including a first antenna and a second antenna, coupled to a ground plane. The antenna assembly may further include an isolation network coupled to the ground plane between the first and second antennas. The isolation network may include a conductive structure between conductive antenna portions of the first and second antennas, and an isolation circuit coupled between the conductive structure and the ground plane. The isolation circuit may include a resistor, an inductor, and / or a capacitor (e.g., coupled in parallel with one another). Other embodiments may be described and claimed.

The invention belongs to the technical field of conductive carbon paste, and discloses a method for efficiently preparing single-walled carbon nanotube paste, which comprises the following steps of: 1, mixing single-walled carbon nanotube powder with a dispersing agent and a solvent, and dispersing the mixture into uniform carbon nanotube bundle paste in manners of mechanical stirring, emulsifying and the like; and step 2, enabling the uniform carbon nanotube bundle slurry to pass through different micropore channels for multiple times in a high-pressure environment, so that the carbon nanotube bundle slurry is dispersed into uniform single carbon nanotube slurry. Through a special high-pressure homogenizing channel, the adhered and wound single-walled carbon nanotube bundles can be dispersed into the slurry of the single single-walled carbon nanotubes on the premise of ensuring the lengths of the single-walled carbon nanotubes as much as possible. The uniform dispersion is realized, the tube diameter of the single-walled carbon nanotubes is relatively long, and the excellent conductivity of the slurry is ensured by the single single-walled carbon nanotubes and the microcosmic number of the single single-walled carbon nanotubes.

According to the back contact battery and the preparation method thereof provided by the invention, doping elements penetrate through the third doping region between the first doping region and the second doping region through high-temperature diffusion to form an electric leakage channel, so that a new back surface structure of the back contact battery is provided. The third doped region is formed by mixing the doping elements of the first doped region and the doping elements of the second doped region, doping of the two impurities is completed at a high temperature in one step, so that an electric leakage channel of an overlapping region is not generated, and the overlapping region of the two doped semiconductor layers with opposite conduction types in the thickness direction of the semiconductor substrate is removed, so that the conductivity of the semiconductor substrate is improved. Therefore, electric leakage loss of the back contact battery in a forward voltage area can be controlled, current in the electric leakage channel is introduced to the grid line of the first electrode or the second electrode through the electric leakage channel or the connecting electrode, the hot spot risk of the back contact battery is reduced, the safety performance of the back contact battery is effectively improved, and the service life of the back contact battery is prolonged. And the back contact battery has relatively high working performance.

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

The present application discloses a semiconductor device and a method for fabricating the semiconductor device. The semiconductor device includes a substrate; a capping mask layer positioned on the substrate; a first gate insulating layer positioned along the capping mask layer, inwardly positioned in the substrate, and including a U-shaped cross-sectional profile; a first work function layer positioned on the first gate insulating layer; a first conductive layer positioned on the first work function layer; and a first capping layer positioned on the first conductive layer. The first capping layer includes germanium oxide. A top surface of the first capping layer and a top surface of the capping mask layer are substantially coplanar.

The invention belongs to the technical field of radar wave-absorbing materials, and discloses a double-sided wave-absorbing broadband stealth composite material and a preparation method thereof. The broadband stealth composite material with the double-sided wave absorbing function comprises a non-metal-based composite material body and at least five metamaterial layers arranged in the thickness direction of the non-metal-based composite material body at intervals. The number of the metamaterial layers is an odd number, a middle metamaterial layer is arranged in the middle of the metamaterial layers in the thickness direction, and the rest metamaterial layers are symmetrically distributed on the two sides of the middle metamaterial layer; the metamaterial layer comprises conductive pattern units which are periodically arranged; the relative dielectric constant of the nonmetal-based composite material body is not greater than 10; the double-sided wave-absorbing broadband stealth composite material does not contain a metal reflecting layer. When electromagnetic waves with the frequency of 1-18 GHz vertically enter the material, the transmissivity of the material is small (smaller than-13 dB, namely smaller than 5%), and meanwhile the material has low reflectivity in a broadband. And the preparation method is simple to operate and easy to realize large-scale production.

The invention provides a preparation method of a package carrier plate, the package carrier plate and a package structure. The preparation method of the package carrier plate comprises the steps that conductive columns and filling materials are placed in through holes; and curing the filling material to form a filling part. The conductive columns do not need to be prepared in the through holes in an electroplating mode, so that the packaging carrier plate with a high aspect ratio can be prepared conveniently, pores generated in the conductive columns due to non-uniform diffusion of electroplating liquid medicine in the through holes can be avoided, and the electrical performance and the reliability of the packaging carrier plate are ensured. Meanwhile, the arrangement of the filling parts can enhance the connection stability between the conductive columns and the substrate.