37results about How to "Good electromagnetic shielding properties" patented technology

A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.

The invention provides an electromagnetic shield packaging assembly and a manufacturing method therefor, and belongs to the packaging field of a semiconductor device. An electromagnetic shield cover is formed in the interior of the electromagnetic shield packaging assembly; and the bottom of the side wall of the electromagnetic shield cover and a chip carrier are exposed on the surface of a plastic packaging body to be used as an electrode terminal electrically connected with an external circuit. The electromagnetic shield characteristic of the electromagnetic shield packaging assembly is effectively improved.

The invention discloses a highly heat-resistant graphite film metal composite and a preparation method thereof. The highly heat-resistant graphite film metal composite comprises a graphite film layer, a surface-roughened metal layer and a highly heat-resistant thermoplastic resin layer. A single-layer or multi-layer highly heat-resistant graphite film metal composite is obtained by preparing a highly heat-resistant thermoplastic resin adhesive, treating the surface of the metal layer, preparing the composite and other steps. The preparation method provided by the invention is simple and the prepared highly heat-resistant graphite film metal composite has excellent thermal conductivity and excellent heat resistance and solvent resistance, can be electromagnetically shielded, and is suitable for use in electronic and electric equipment with high heat dissipation and high heat resistance requirements.

A small infrared sensor has a wide infrared light-receiving area (viewing angle), high electromagnetic shielding characteristics, and excellent electromagnetic-wave resistance characteristics. In the infrared sensor, supporting portions are disposed at four corners of a substantially rectangular opening in a package. The supporting portions support an optical filter, disposed so as to cover the opening, at positions that are lower than an upper end of an inner peripheral wall defining the opening. While the optical filter is supported by the supporting portions as a result of inserting a portion of a surface side of the optical filter facing the supporting portions into the opening, the optical filter is secured to the package. The optical filter and the package are joined and secured, and electrically connected to each other through a conductive adhesive.

The invention provides a metal magnetic powder core can-type magnetic core which is manufactured by one or a plurality of metal soft magnetic powder. The particle diameter is 5mu m-180mu m; the outer diameter of the can-type magnetic core is 4cm-15cm; the thickness of the can wall is 2mm-2cm; the thickness of the bottom is 5mm-3cm; the height is 2cm-15cm; and the side face of the can-type magnetic core is provided with a notch of 10mm-20mm. Compared with the prior art, the metal magnetic powder core can-type magnetic core provided by the invention is manufactured by adopting the plurality of metal soft magnetic powder, has favorable direct current superposition characteristics, excellent electromagnetic shielding properties, extremely low magnetic core loss, and higher coiling window utilization ratio.

The invention provides a fan assembly and an electric device with the same. The fan assembly resolves the problem that noise is large in the existing electric device. The fan assembly comprises a first casing, a noise reduction material and a bladeless fan. A recessed portion with an opening is limited. The noise reduction material is arranged on the inner side or the outer side of the first casing. The bladeless fan further comprises a base and a fan head. The fan head is arranged in the recessed portion of the first casing, and the base is arranged on the outside of the first casing. A plurality of ventilation holes are arranged on the first casing, and the bladeless fan is used for producing negative pressure through first air flow blown by the fan head in the recessed portion of the first casing to enable second air flow to pass through the noise reduction material and the first casing and to be discharged through an opening of the recessed portion. The fan assembly adopts the noise reduction material to reduce or remove noise of the second air flow passing through the noise reduction material. The fan assembly and the electric device with the fan assembly have small noise.

A shield wire is formed of eight twisted insulated core wires 1, an inclusion 2 between these respective insulated core wires 1, a tape 3 laterally wound around an outer periphery of a core formed of the insulated core wires and inclusion, a drain wire 4 disposed on an outer surface of the tape, a conductive fiber braided body 5 formed on an outer peripheral surface of the tape so as to interpose the drain wire, a sheath 6 that forms an outer peripheral surface of the braided body, and an adhesive layer 7 between the braided body and sheath. A braided body 5′ is adhesively integrated to the sheath 6′ by an adhesive layer; thus, the braided body 5′ is stripped with the sheath. This eliminates a need for a removal work of the braided body after stripping the sheath, thus ensuring good workability of the terminal processing.

A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.

The invention provides a folding screen bent region routing structure, a display device and a manufacturing method of the folding screen bent region routing structure. The folding screen bent region routing structure comprises a routing substrate, silica gel packaging layers, liquid routings and metal routings. The liquid routings are packaged in the silica gel packaging layers; the silica gel packaging layers can implement sizing of the liquid routings; and the metal routings are arranged at the end parts of the silica gel packaging layers and extend into the silica gel packaging layers to beelectrically connected with the liquid routings. The display device comprises the folding screen bent region routing structure. The manufacturing method of the folding screen bent region routing structure comprises the steps of: etching the routing substrate; manufacturing the silica gel packaging layers; manufacturing the liquid routings; and carrying out electrical connection processing. Due toadoption of the liquid routings in a bent region, the defects of difficulty in bending and easiness for generating cracks in the bending process of a metal routing structure are avoided; and by the structure, a breakage problem in the bending process can be prevented, product yield is improved, and a risk of failure of a folding screen in the using process is reduced.

The invention relates to an MXene electromagnetic shielding fabric as well as a preparation method and application thereof. The method comprises the following steps of carrying out plasma pretreatment on a flexible fabric substrate, dipping in an MXene dispersion liquid, taking out, drying, and carrying out low-temperature annealing treatment under a CO2 condition. The electromagnetic shielding fabric has good flexibility, washing resistance and electromagnetic shielding characteristics.

The invention discloses MXene-based electrothermal ink as well as a preparation method and application thereof, and belongs to the technical field of electrothermal ink. The electrothermal printing ink comprises MXene nanosheets, xanthan gum and water, the mass fraction of the MXene is 5-35%, and the mass ratio of the MXene to the xanthan gum is (300-200): (1-10). The preparation method comprises the following steps: firstly, adding the xanthan gum powder into the water, and fully mixing to prepare a bonding base material; and then fully dispersing the MXene powder into the bonding base material to prepare the MXene-based electrothermal ink. The MXene-based electrothermal ink is good in stability, low in solid content, green, environment-friendly and low in cost, when the MXene-based electrothermal ink is used for silk-screen printing, the curing temperature is low, an obtained silk-screen printing electrothermal film can shield 99.99% of electromagnetic waves under the X wave band, and the electromagnetic shielding characteristic is excellent; moreover, stable temperature rise can be realized under a relatively low driving voltage, effective work in a severe cold environment can be realized, a heat preservation effect is achieved, and potential application prospects are realized.

The invention provides a high-voltage bus cable for an airport navigational light system, and a preparation method and an application of the high-voltage bus cable. The bus cable is composed of multiple shielded twisted pairs; an insulator is arranged outside an conductor; a shielding layer is arranged outside the twisted pairs; a copper strip which is used as a total shielding layer of the wholecable body is wound on the outer layers of the multiple shielded twisted pairs; a layer of polyethylene sheath material is subjected to extrusion molding outside the total shielding layer to serve asan inner sheath of the cable body; an armored galvanized steel wire is wound outside the inner sheath to serve as an armored protection layer; and polyethylene or polyvinyl chloride is extruded outside the armored protection layer to serve as an outer sheath. The preparation method of the cable is as shown in the description. When a navigational light cable works normally, reliable monitoring andmanagement can be carried out on the whole navigational light system; when a local part of the navigational light cable breaks down, through a bus structure in a topological form, a fault point of thenavigational light cable can be immediately determined; and high-voltage power supply is immediately carried out on the navigational light cable in the navigational light system through the system, thereby solving the problem of temporary power supply of a navigational light.

The invention provides an electronic calibration test system for a space electric field detector. The system can provide a guarantee and support for electric field detector and satellite platform integration test electronic performance. The electronic calibration test system for the space electric field detector comprises an electric field detector signal processing unit 1, a Faraday outer cable 2, a cage wall insulation ring 3, a Faraday inner cable 4, a cage inner insulation bracket 5, a drum extension rod 6, a sensor 7, a sensor signal input tool 8, a grounding pile 14 and a Faraday cage 16.

A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.

The invention relates to a resin composition with ultrahigh thermal conductivity and a preparation method thereof. The resin composition comprises the following components and raw materials in parts by weight: 30-75 parts of a matrix resin, 20-50 parts of natural graphite, 5-20 parts of reinforced fibers, 3-6 parts of a compatilizer, 0.1-1 part of an antioxidant and 0.5-2 parts of a lubricant. Thepreparation method comprises the following steps: uniformly mixing the raw materials except the reinforced fibers, feeding an obtained mixture into a main feeding hole of a double-screw extruder through a weightless metering device; feeding the reinforced fibers into a side feeding hole of the extruder in proportion by adopting a weightless metering device; controlling the temperature of the double-screw extruder to 230-300 DEG C, melting and fully mixing the materials under the conveying, shearing and mixing of screws, and carrying out extrusion by a neck mold, drawing, cooling, drying, pelletizing and the like to obtain the resin composition with ultrahigh thermal conductivity. The resin composition provided by the invention has the advantages of ultrahigh thermal conductivity, very lowcost, excellent electromagnetic shielding performance, balanced mechanical properties, heat resistance and convenient productbility.

The invention discloses a damp and heat resistant electromagnetic shielding film, a composite material, a preparation method and an application. The damp and heat resistant electromagnetic shielding film comprises a conductive composite carbon nanotube film. The conductive composite carbon nanotube film comprises a carbon nanotube film layer, a conductive substance / carbon nanotube composite structure and a conductive layer arranged in turn along a set direction. The preparation method includes the steps of depositing a conductive layer on the surface of a carbon nanotube film and forming a conductive substance / carbon nanotube composite structure between the carbon nanotube film and the conductive layer by controlling the structure of the carbon nanotube film and the deposition parameters of the conductive layer, so as to obtain a conductive composite carbon nanotube film. The unification of the electromagnetic shielding performance, mechanical performance and environmental stability ofthe composite film is realized through the composition with the carbon nanotube film layer and the water and oxygen isolation of a protective layer. Through the combination of a carbon nanotube filmlayer and a composite material preform resin layer, a structure and function integrated composite material with excellent mechanical performance, high electromagnetic shielding performance and damp and heat resistance is obtained.

A bundled flexible flat circuit cable includes a flexible substrate that forms at least one cluster section having an end forming at least one first connection section and an opposite end forming at least one second connection section. Both the first and second connection sections or one of the first and second connection sections form a stack structure. The flexible substrate can be of a structure of single-sided or double-sided substrate and may additionally include an electromagnetic shielding layer. A bundling structure is provided to bundle the cluster section at a predetermined location to form a bundled structure. The bundling structure can be made of a shielding material, an insulation material, or a combination of shielding material and insulation material.

The invention discloses a flexible composite material with high electromagnetic shielding performance and a preparation method thereof. The preparation method comprises the following steps: obtaining a polymer solution; adding liquid metal into the polymer solution, and mechanically stirring to obtain a mixed emulsion; casting the mixed emulsion to obtain a liquid metal particle / polymer composite material; subjecting obtained material to isobiaxial stretching, fixing and heat treatment, so that the stretching state is kept, and a liquid metal sheet / polymer composite material is obtained; casting a layer of mixed emulsion on the upper surface of the obtained material, and carrying out lamination treatment; repeating casting and stacking, subjecting the obtained material to hot pressing treatment and heating curing, and obtaining the flexible composite material with the high electromagnetic shielding performance. According to the flexible composite material with the high electromagnetic shielding performance and the preparation method of the flexible composite material, combination of flexibility and the high electromagnetic shielding performance is achieved, the electromagnetic shielding effectiveness of the prepared material is isotropic, and the flexible composite material has excellent flexibility and stretchability and has wide application prospects.

The invention provides a packaging resin composition for a surface acoustic wave device, a laminated body and a preparation method thereof. The packaging resin composition comprises a resin matrix and filler; the resin matrix comprises epoxy resin and an epoxy resin curing agent; the filler comprises a heat-conducting filler and a shielding filler; the heat conductivity of the heat-conducting filler at 25 DEG C exceeds 2W / (m.K), the electric conductivity of the shielding filler at 25 DEG C exceeds 10<2>S / m, and the mass percent of the shielding filler and the heat-conducting filler in the packaging resin composition is 40-70%. The packaging resin composition for the surface acoustic wave device provided by the invention not only can ensure that the packaging resin has excellent heat dissipation performance, but also can reduce the insertion loss of the surface acoustic wave device by forming a continuous shielding structure, and can meet the requirements of the high-frequency and high-power surface acoustic wave device on comprehensive properties such as high thermal conductivity and low insertion loss.

The invention discloses a damp heat resistant electromagnetic shielding film, a composite material, a preparation method and an application thereof. The heat and humidity resistant electromagnetic shielding film includes a conductive composite carbon nanotube film, which includes a carbon nanotube film layer, a conductive substance / carbon nanotube composite structure and a conductive layer arranged in sequence along a set direction. The preparation method includes: depositing a conductive layer on the surface of the carbon nanotube film, and forming a composite structure of conductive material / carbon nanotube between the carbon nanotube film and the conductive layer by controlling the structure of the carbon nanotube film and the deposition parameters of the conductive layer, A conductive composite carbon nanotube film was obtained. The present invention achieves the unity of electromagnetic shielding performance, mechanical performance and environmental stability of the composite film through compounding with the carbon nanotube film layer and the isolation of the protective layer to water and oxygen; Combination of structure and function integrated composite materials with excellent mechanical properties, high electromagnetic shielding performance, and resistance to hot and humid environments.

The invention relates to a tin-nickel alloy electromagnetic shielding material and a preparation method thereof. The components of the tin-nickel alloy electromagnetic shielding material comprise the fiber fabric of a metallic coating and a surface tin-nickel alloy which is electrodeposited on the surface of the fiber fabric of the metallic coating; the preparation method includes that (1) the fiber fabric of the chemical metallic coating is soaked with chromic acid solution and flushed with clear water; (2) a complexing agent, nickel vitriol, stannous chloride and an additive are prepared toobtain tin-nickel plating solution and the pH of the solution is adjusted. A nickel anode is adopted and the fiber fabric plated with electroless copper or nickel phosphide is immersed and electroplated till the completion of a replacement reaction to obtain the electromagnetic shielding material covered with the tin-nickel alloy; (3) the electroplated fabric is washed with water and coated with a water-base resin of low concentration, and then thermally dried by a heat-setting machine to obtain the tin-nickel alloy electromagnetic shielding material. The material of the invention has excellent shielding performance and decay resistance, and can be widely applied to antistatic clothing, electromagnetic radiation protective clothing, the wall cloth and the window curtains of a secret room and the cable shielding.

The application provides a power transmission system, comprising: a power supply source and a transmitting electrode which are arranged on a ground, a receiving electrode arranged at the bottom of a vehicle, and a power conversion apparatus and a power-consuming appliance which are arranged on the vehicle, wherein the receiving electrode is a curved electrode; the curved surface of the receiving electrode has downward radian; the power supply source is connected with the transmitting electrode; the transmitting electrode and the receiving electrode form an interactive magnetic field under theaction of alternating current; the power conversion apparatus is connected with the receiving electrode and the power-consuming appliance. The power transmission system according to the technical scheme has high power transmission efficiency and low electromagnetic radiation influence.

The invention provides a wiring structure in a bending area of ​​a folding screen, a display device and a manufacturing method thereof. The wiring structure in the bending area of ​​the folding screen includes a wiring substrate, a silicone packaging layer, a liquid wiring, and a metal wiring. The liquid wiring is encapsulated in the silicone packaging layer, and the silicone packaging layer can realize the shaping of the liquid wiring; the metal wiring is arranged at the end of the silicone packaging layer and extends into it to communicate with the liquid wiring electrical connection. The display device includes the above wiring structure in the bending area of ​​the folding screen. The manufacturing method of the routing structure in the bending area of ​​the folding screen includes the steps of etching the routing substrate, manufacturing a silicone packaging layer, manufacturing liquid routing, and electrical connection treatment. The bending area uses liquid wiring to avoid the defects that the metal wiring structure is not suitable for bending and is prone to cracks during the bending process. This structure can prevent the problem of line interruption during the bending process, improve product yield, and reduce the use of folding screens. risk of failure.

The invention discloses small data recording equipment based on a laminated design and an assembling method. The equipment is characterized in that the equipment comprises a communication board layer(a basic layer), a processor board layer, an input board layer (an intermediate layer), and a filter board layer (a top layer), which are connected in sequence; and a guide pin A and a guide pin B areguided in the process of stacking in the middle layer and between the functional layers, so that accurate positioning and guiding of the layers in the blind insertion process are ensured. According to the invention, a data storage function of a current data recorder can be completed; for the miniaturization requirement of a product, the invention provides a lamination-based design. All the functional levels are mutually stacked and designed; the data recording equipment has the characteristics of small product cross section size, stacked installation of all functional levels, good blind-mating operability and good test and maintenance performance to realize the data recording equipment based on module miniaturization; besides, the equipment is also provided with a 1553B interface, an information exchange interface and a software online upgrading interface, and a solution with more comprehensive functions is provided for the data recording equipment.

An ultrathin coaxial cable comprises: inside conductor; dielectric layer at periphery of the inside conductor, comprising polyamide and polymer alloy of ABS resin; film shielding layer at the periphery of the dielectirc layer; protecting coating layer at the periphery of the film shielding layer. The invention also provides a method for manufacturing the ultrathin coaxial cable, comprising the following steps: forming the dielectirc layer including polymer alloy at periphery of the inside conductor through extruding; etching the dielectric layer's surface with hydrochloric acid, phosphoric acid, sulphuric acid or organic acid; treating the periphery of the etched dielectirc layer in order to supply catalyzer; activating the catalyzer; forming the film shielding layer at the periphery of the dielectirc layer by chemical plating or the combination of chemical plating and electric plating, the said dielectirc layer has activated catalyzer; forming protecting coating layer at the periphery of the film shielding layer.

The invention provides an electromagnetic shielding packaging component and a manufacturing method thereof, which belong to the field of semiconductor device packaging. An electromagnetic shielding cover is formed inside the electromagnetic shielding package assembly, and the bottom of the side wall of the electromagnetic shielding cover and the chip carrier are exposed on the surface of the plastic package as an electrode terminal electrically connected to an external circuit, which effectively improves the Electromagnetic shielding characteristics of electromagnetic shielding package components.

A graphene / pyrolytic carbon / silicon carbide electromagnetic shielding composite material and a preparation method thereof provided by the present invention include the following steps: step 1, preparing a G sponge three-dimensional skeleton; The three-dimensional skeleton of the G sponge obtained in PyC and SiC was alternately impregnated and cracked in the order of PyC and SiC until it was completely densified to obtain G / (PyC‑SiC) n Electromagnetic shielding composite material; the multi-layered G / (PyC-SiC)n composite material prepared by the invention not only has the ultra-high specific strength of high-temperature structural materials, but also has both ultra-strong electromagnetic shielding properties and ultra-light density. The total electromagnetic shielding effectiveness (SET) is above 40dB, and it is expected to be used in the structural components of countermeasures.

The invention provides a carbon fiber tube reinforced external self-similar fractal composite electromagnetic shielding honeycomb-like structure plate. The honeycomb-like structure plate is composed of an upper panel, a lower panel and a honeycomb inner core. The honeycomb inner core is composed of a fractal honeycomb structure and a carbon fiber tube embedded in a honeycomb center; and the electromagnetic shielding coatings are coated on the inner wall and the outer wall of the honeycomb structure. According to the carbon fiber tube reinforced external self-similar fractal composite electromagnetic shielding honeycomb structure board, the problem that on a spaceflight material shell at present, a board needs certain bearing capacity besides excellent electromagnetic performance, and the design of light weight is met is solved. According to the plate for the spacecraft, it is guaranteed that electromagnetic waves are absorbed, the excellent bearing capacity is achieved, light weight can be achieved while the problem is solved, and the physical performance of the plate is improved under the condition that the strength requirement is met.