161 results about "Polymer dielectrics" patented technology

High-temperature, multiple-layer polymer (MLP) capacitors with a stacked electrode arrangement are disclosed. The capacitor electrodes are separated by a polymer dielectric that is stable at high temperatures. In some embodiments, the polymer dielectric also has a high permittivity and is filled with high-permittivity nanoparticles, which enables the capacitor to achieve a very high capacitance density.

A grating coupled surface plasmon resonance optical modulator is disclose. A electro-optic polymer dielectric is deposited on the metallic surface of a diffraction grating to provide a metal/dielectric interface. A surface plasmon will propagate at the metal/dielectric interface in a resonant condition, e.g., when the metal surface is illuminated by transverse magnetic (TM) polarized light of the appropriate wavelength, angle of incidence and phase velocity. In the present invention, phase velocity is controlled by the diffraction grating. A transparent electrode deposited on the electro-optic layer allows an electrical potential to be applied across the electro-optic polymer. The applied electrical potential (voltage) changes the index of refraction of the electro-optic polymer, thereby disrupting the resonant condition to produce an optically detectable change in reflectance of incident light from the metal layer. The disclosed grating coupled surface plasmon resonance optical modulator may be configured as an electronically or optically addressable array.

The invention discloses a polymer dielectric medium with low dielectric constant and low loss and a preparation method of the polymer dielectric medium. The polymer dielectric medium comprises the following raw materials: 50-60% of epoxy resin system, and 40-50% of mixed boron nitride nanoparticles, wherein the mixed boron nitride nanoparticle is a mixture of a boron nitride nanotube and a boron nitride nanotube; the epoxy resin system is formed by 100phr of epoxy resin E-51, 85phr of methyl hexahydrophthalic anhydride and 1phr of benzyl dimethylamine in a mixing manner. The thermal breakdown voltage of the polymer dielectric medium is significantly improved by the polymer dielectric material with high heat conductivity and high electric breakdown, the service life is prolonged, the dielectric constant and loss and the heat expansion coefficient are reduced, the mechanical strength and the tenacity are improved, the highest heat conductivity can be up to 5.26W/mK, the volume resistivity is about 1014ohm.cm, the thermal breakdown voltage is about 2-3kV/mm higher than that of the similar heat-conducting polymer dielectric medium, and the dielectric constant and the loss are a little lower than those of pure resin.

The method includes following step: two monomers are mixed according to the ratio of 1.0 to 1.0-9.0; then it mixes with thermal booster and liquid lithium ion battery solution to form the fore body of gel polymer dielectric; the fore body is injected into half finished battery. the half finished battery is vacuumized and sealed; the half finished battery is made thermal polymerization reaction, and the gel polymer dielectric is obtained.

This invention relates to a compound type polymer dielectric stuff and its preparation method, belong to electrochemistry and new energy stuff region. It composed by copolymer of fluoro ethylene and hexafluoro-propylene, lithium salts and plastic crystal stuff. Processing steps: take copolymer, lithium salts and plastic crystal stuff, use solvent to dissolve, whip go as far as uniformity, then pour above solution to teflon tooting, evaporate solvent, finally vacuum drying. While this compound type electrolyte stuff in rather wide temperature range and all components are solid-state, the ionic conductivity can reach using standard of lithium Secondary Battery. It overcomes shortcoming of traditional gel-type polymer dielectric that liquid electrolyte easily leak as well as plastic crystal electrolyte unease form film, and also combine the merit that polymer dielectric easily form film as well as plastic crystal electrolyte has high room temperature ionic conductivity.

An embodiment provides an ionic polymer device comprising two extended electrode layers comprising a plurality of conductive particles, wherein the plurality of conductive particles form a concentration gradient in each of the two extended electrode layers, an ionic polymer dielectric layer between two extended electrode layers, and at least one conductive layer on outer surfaces of two extended electrode layers. Another embodiment provides an ionic polymer device comprising a polymer composite with a plurality of surface features on two opposite surfaces, and at least one conductive layer on each of said two opposite surfaces. One embodiment provides a method of making an ionic polymer device, comprising forming a partially cured polymer-metallic salt layer, reducing the metallic salt to form a plurality of metal particles, thereby forming a first extended electrode layer and a second extended electrode layer at and near opposite surfaces of the ionic polymer device.

A patch antenna includes a metallic ground plate, a metallic radiating element, and a polymer plastic dielectric layer sandwiched between the radiating element and the ground plate. Top and bottom surfaces of the dielectric layer are primed with polymeric surfactants to provide better adhesive characteristics at low temperatures. The radiating element is fixed to the dielectric layer by compressing an adhesive layer applied to the radiating element between the radiating element and the priming layer applied to the top surface of the dielectric layer. The ground plate is fixed to the dielectric layer by compressing another adhesive layer applied to the ground plate between the ground plate and the priming layer applied to the bottom surface of the dielectric layer. A low noise amplifier may be integrated with the antenna by sharing the common ground plate and connecting the amplifier's signal trace to the radiating element via a conductor pin.

This invention belongs to electrochemical techniques region, relates to the preparation method and application of a sort of organic inorganic compound polymer dielectric. The process includes: by emulsion polymerization, use polyacrylic acid methyl ester to carry out coverture modification hand ling to nanometer titanium dioxide particle; by solution polymerization method, carry out copolymerization of acrylonitrile and acrylonitrile methyl ester to modified nanometer titanium dioxide particle, obtain organic inorganic compound polymer. This compound polymer could as polymer dielectric stuff of lithium ion Secondary Battery, possess good ionic conductivity and mechanical property.

The invention relates to a flexible polymer dielectric material used for a capacitor and the preparation thereof. The material is the blending material of fluorine-containing polymer and nylon, wherein, the fluorine-containing polymer is any one of polyvinylidene fluoride, vinylidene fluoride- trifluoroethylene copolymer and vinylidene fluoride-tetrafluoroethylene copolymer; the nylon is any one of PA7, PA9, PA11, PA7/ PA9, PA7/PA11, PA9/PA11 and PA7/ PA9/PA11. The volume ratio between the nylon and the fluorine-containing polymer is 10%-90%: 90%-10%. The preparation steps comprises: 1) under the condition that the temperature is 150-230 DEG C and the rotating speed is 15-50r/min, the nylon and the fluorine-containing polymer are mixed in mixing equipment according to the volume ratio of 10%-90%: 90%-10%, and then the mixture is cooled naturally; 2) the mixture obtained in the step 1) is pressed for shaping in a mould, the mould pressing temperature is 150-230 DEG C, the mould pressing pressure is 10-25MPa, and the pressing time is 15-30min; the pressed mixture is cooled when in pressure maintaining, so that the flexible polymer dielectric material is obtained. The flexible polymer dielectric material has good mechanical property and higher dielectric constant; the property needed by the material can be adjusted by regulating the mixture ratio between the nylon and the fluorine-containing polymer, so that the invention is especially suitable for preparing film dielectric material.

A multilayer dielectric structure is formed by vacuum depositing two-dimensional matrices of nanoparticles embedded in polymer dielectric layers that are thicker than the effective diameter of the nanoparticles, so as to produce a void-free, structured, three-dimensional lattice of nanoparticles in a polymeric dielectric material. As a result of the continuous, repeated, and controlled deposition process, each two-dimensional matrix of nanoparticles consists of a layer of uniformly distributed particles embedded in polymer and separated from adjacent matrix layers by continuous polymer dielectric layers, thus forming a precise three-dimensional nanoparticle matrix defined by the size and density of the nanoparticles in each matrix layer and by the thickness of the polymer layers between them. The resulting structured nanodielectric exhibits very high values of dielectric constant as well as high dielectric strength.

The invention discloses micro-nano multi-layer composite dielectric materials and a preparation method and a device thereof. The micro-nano multi-layer composite dielectric materials comprise a polymer layer and a polymer blend layer, and the polymer layer and the polymer blend layer interlace with each other. In the polymer blend layer, one kind or more kinds of padding among globular padding, flakiness padding, threadiness padding and rodlike padding are evenly distributed in a polymer matrix. According to the micro-nano multi-layer composite dielectric materials and the preparation method and the device thereof, the padding is added into the polymer matrix, a specialty polymer micro-nano stacking and co-extruding device is used, a polymer dielectric membrane with a micro-nano multi-layer structure is prepared, thus dispersibility of the padding is improved effectively and modified padding is evenly distributed in the polymer matrix in a product, and therefore the purpose of controlling the dielectric property of a polymer is realized. In the preparation process of the micro-nano multi-layer composite dielectric materials, no solvent or binder exists, production cost is low, the micro-nano multi-layer composite dielectric materials are environment friendly, continuous production can be achieved, and the dielectric constant of the obtained product is improved notably.

A substrate comprising a capacitor comprising metal electrodes and a ceramic or metal oxide dielectric layer, the capacitor being embedded in a polymer based encapsulating material and connectable to a circuit via a via post standing on said capacitor.

The invention relates to a soft type polymeric compound lithium battery and a preparation method thereof. The soft type polymeric compound lithium battery is characterized by comprising a positive electrode piece which takes aluminize carbon cloth as a current collector, a negative electrode piece which takes coppered carbon fibre cloth as a current collector, and a partition plate which is a compound polymer dielectric film and arranged between the positive electrode piece and the negative electrode piece, wherein an aluminium model film is used for external packing. The soft type polymeric compound lithium battery provided by the invention has the advantages of strong shock resistance property, high safety feature, high mechanical property and good flexility.

A bare semiconductor circuit die carrier is provided for use in the test of semiconductor circuits, the carrier, comprising: a substrate defining an opening and an outer perimeter; a multiplicity of I/O pads disposed about the perimeter; an interconnect circuit which includes a composite of a multiplicity of individual electrical conductors which are formed in a polymer dielectric; wherein the interconnect circuit overlays a top surface of the substrate and extends across the opening so as to form a flexible membrane that spans the opening; a multiplicity of die contact pads connected to the conductors are disposed about the flexible membrane with particles deposited on the die contact pads; a fence upstanding from the membrane and sized to receive a test die; a top cap that rests upon the die when the die is received within the fence; a bottom cap that rests against a bottom surface of the substrate; and a fastener for securing the top cap to the bottom cap with the die disposed therebetween.

This invention discloses a method for preparing a hydrophobic suspension of titanium dioxide nanoparticles. In the method sodium methylene dinaphthalene sulfonate is used as a high-efficiency wetting agent to adsorb on the surface of titanium dioxide nanoparticles, and acts as a polymer dielectric medium in water to facilitate the infiltration and diffusion of water molecules into the nanoparticles until complete wetting. Moreover, a high-shear dispersing mulser is used, and a composite dispersing system composed of polyacrylate, sodium methylene dinaphthalene sulfonate and lignosulfonate is added. During the dispersing process, new surface formed by nanoparticle separation can be covered by the dispersant in time to form double electric layer and obtain a stable hydrophobic suspension of titanium dioxide nanoparticles. The method can solve the problem of poor stability faced by conventional nanoscale dispersing systems, and facilitate wide applications of nanotechnology in such fields as textile, coating, ceramics and environmental protection.

This invention discloses a gel polymer electrolyte, a preparation method for the same, a super capacitor and an application thereof. The gel polymer electrolyte preparation method includes steps of preparing viscous liquid containing PEO polymer, preparing gel polymer dielectric films through curtain coating and dipping and absorbing the electrolyte. The super capacitor contains the gel polymer electrolyte. The preparation method for the gel polymer electrolyte is simple in preparation, mature in technology and high in rate of finish products and efficiency, and effectively reduces the production cost. The gel polymer electrolyte prepared by the method has strong mechanical strength and high conductivity. The super capacitor containing the gel polymer electrolyte is high in the rate of finished products and low in production cost, and has excellent chemical properties and expands the application range of the super capacitor.

The invention relates to composite mesoporous silica (IL/SiO2) for encapsulating ionic liquid and preparation and application thereof. The IL/SiO2 is a composition formed from 1-carboxymethyl-3-methylimidazole bis(trifluoromethane)sulfonimide salt (ionic liquid, IL for short) and mesoporous silica, the mesoporous silica is expanded through a pore-expanding agent, and the aperture range is 10-15 nanometers; the IL/SiO2 is applied to all-solid-state polymer electrolyte of a lithium ion battery, and a raw material comprises the following components in parts by weight: 100 parts of carboxylic acrylonitrile butadiene rubber, 2.0-3.0 parts of vulcanizing agents, 20-60 parts of lithium salt and 0.1-30 parts of IL/SiO2. Compared with the prior art, the composite mesoporous silica (IL/SiO2) disclosed by the invention can be used for effectively solubilizing the lithium salt by being applied to a polymer dielectric, thereby providing a lithium ion migration channel. The polymer electrolyte prepared by applying the composite mesoporous silica (IL/SiO2) has the advantages of higher room-temperature conductivity and excellent mechanical properties.

Provided is a composite electrode including a metal layer and a composite dielectric layer. The composite dielectric layer includes a metal oxide dielectric layer and a polymer dielectric layer. The composite dielectric layer overlays the metal layer. The polymer dielectric layer includes a nitrogen-containing polymer and overlays the metal oxide dielectric layer. An electrolytic capacitor is also provided. The electrolytic capacitor has a polymer dielectric layer made of a nitrogen-containing polymer, and such polymer dielectric layer is beneficial to increase the insulating property of the metal oxide dielectric layer and the coverage property of the conductive polymer. Thereby, the conventional leakage current can be significantly reduced and the yield can be improved.

In one embodiment, the disclosure relates to a method and apparatus for surface recovery of a polymer insulation layer through implantation. The method includes providing a substrate having thereon a conductive pad and an insulation layer, optionally processing the conductive pad to remove oxide layer formed on the conductive pad and conducting ion implantation to recover dielectric properties of the insulation layer.

This invention relates to a kind of polymer dielectric nanometer SiO2 linkage upper surface functional group. It is hydrophobicity functional group with Si - CH2CH2( CF2) 5CF3 topcoated; the particle size of nanometer SiO2 is 7 to 20 nm, specific surface area is 150 to 300 sq m/g. Hydrophobicity quality of this invention is good for dispersing at PEO group polymer dielectric system, thereby could reduce crystalline phase content og this system, advance conductivity.

The invention discloses a LED device with a temperature controlling function, which includes: a LED grain, a cooling unit, a thermal conductivity layer and a temperature controlling component. The described cooling unit and the thermal conductivity layer on the surface of the cooling unit carriers the LED grain, which cools for the LED grain when the LED grain connects the power (i.e. light). The described temperature controlling component series between the LED grain and the power, which has a character of positive temperature coefficient, and the distance between the LED grain and the component, is less than 3 cm. The described thermal conductivity layer can be composed of polymer dielectric materials and thermal conductivity is larger than 1.0W/mK (room temperature 25deg.C).

The invented preparing method includes only two steps. First, mixing the alcoholic solution of the compound of platinum (and alloy constituent) with the carbon carrier fully, making the admixture evenly. The alcohol solvent is vaporized by use of the water bath at the controlled temperature. Then, the dry powder obtained is deoxidized in hydrogen at the condition of mild heating. The granularity of the platinum (alloy) obtained by the method is 1-2 nm with evenly distributed on the carbon carrier. The catalyst possesses the better performances of the electrocatalysis reaction relevant to the polymer dielectric film fuel cell such as oxidation of hydrogen and deoxidization of oxygen, oxidation of carbon monoxide, oxidation of methanol. The invention provides the features of easy of operation, without need of filtering and washing only need of a little cheap chemicals.