47results about How to "Maintain electrical properties" patented technology

The invention provides electronic parts which comprise a composite dielectric layer composed of an organic insulating material and a dielectric ceramic powder having a larger relative dielectric constant than the organic insulating material, and which also comprise conductive element sections forming inductor elements, etc., wherein the organic insulating material comprises a cured resin obtained by curing reaction of an epoxy resin with an active ester compound obtained by reaction between a compound with two or more carboxyl groups and a compound with a phenolic hydroxyl group. The dielectric ceramic powders of the described electronic parts have larger relative dielectric constants than the organic insulating materials, and the organic insulating materials have low dielectric loss tangents. It is possible to adequately reduce time-dependent dielectric constant changes in the high-frequency range of 100 MHz and above even with prolonged use at high temperatures of 100° C. and higher, while it is also possible to satisfactorily prevent deformation and other damage to the electronic parts during their handling.

The invention discloses a method for preparing high-quality graphene in large scale by intercalation stripping of graphite by chemical method. The main principle and approach are as follows: inserting some reagent into graphite intercalation by chemical method, then adding energy or some reagent to make intercalation material rapidly and violently react to release air and stripping graphite into graphene. The specific embodiment proposal comprises means of liquid phase stripping, solid phase stripping and two-step liquid phase and solid phase combined stripping. The prepared graphene has high single intercalation quality and few detects since it does not go through oxidation and reduction processes. The oxygen content is only 1.63% and is the lowest in known graphene preparation method by graphite. There is no impurity or molecule absorbed on the graphene surface. The invention has low cost, high yield, simple and feasible preparation method and low energy consumption and is suitable for large scale generation.

The invention discloses a preparation method of carbon nano tube fiber-graphene composite material. The method comprises the following steps of: a, preparing carbon nano tube fiber, meanwhile, wetting and modifying the carbon nano tube fiber by solution; b, providing graphene, adding the graphene into water solution, forming uniformly dispersed graphene dispersion liquid under the action of ultrasonic wave; c, dropping a dispersing agent into the graphene dispersion liquid, and stirring uniformly; d, fully contacting the carbon nano tube fiber with the graphene dispersion liquid so as to coat the surface of the carbon nano tube fiber with the graphene; e, then, drying the carbon nano tube fiber coated with the graphene, thereby obtaining the composite material. The carbon nano tube fiber-graphene composite material provided by the invention keeps the mechanical property and the electrical property of the carbon nano tube fiber, and endows the surface of the carbon nano tube fiber with lots of functional modification groups, such as carboxyl, hydroxyl and epoxy group, so that the surface hydrophilicity of the carbon nano tube fiber can be regulated effectively.

Provided is a bonding structure of an electronic equipment including first electrodes extended in a first direction and arranged in a second direction on a stretchable display panel having stretchability, second electrodes extended in a first direction and arranged in a second direction on a substrate and facing the first electrodes, and solder bonding parts interposed between the first electrodes and the second electrodes, facing each other in the second direction, and constituting a plurality of rows in the first direction.

A silicone rubber coating composition comprising (A) an organopolysiloxane, (B) an organosilicon compound having at least three hydrolyzable groups or a partial hydrolyzate thereof, and (C) aluminum hydroxide surface treated with a silane, siloxane or silazane is coated onto the surface of an insulator body to form a high-voltage electric insulator film which maintains the stabilized electrical properties of silicone rubber over a long term even in the ambient environment.

The invention discloses an electrospinning-based flexible tensile strain sensor with a spiral wound structure, and a preparation method of the electrospinning-based flexible tensile strain sensor. A sensitive resistor of the product is made of a bifilar helix prepared through twice twisting of a conductive nanofiber membrane prepared through the combination with an electrospinning method. The sensor has relatively high conductivity, still has a conductive property at relatively large tension and large-size tension, has advantages of relatively good toughness, high tensile recovery property, good tensile stability, wide strain withstanding range, simple preparation method and low production cost, and is suitable for large-scale production.

The present invention is directed to methods for depositing doped and/or alloyed semiconductor layers, an apparatus suitable for the depositing, and products prepared therefrom.

The invention relates to a method for increasing the yield of graphene prepared by a supercritical fluid through pretreatment of natural graphite. The method comprises the steps as follows: natural graphite powder and acid are added into a container and stirred uniformly; an additive is added, and the mixture is cooled to obtain low-temperature graphite slurry; the low-temperature graphite slurry is sprayed to a high-pressure reaction kettle containing supercritical fluid media for supercritical treatment; and then a material after the supercritical treatment is rapidly sprayed into a normal-pressure production material tank and is filtered, separated and dried to obtain the graphene product. Compared with the prior art, the low-temperature natural graphite slurry pretreated by the acid is taken as feedstock; compared with the normal-temperature natural graphite serving as feedstock, the yield of graphene is increased by about 2-5 times through the supercritical fluid stripping process; and not only is the yield of graphene increased, but also the electrical property and the thermal property of graphene are further maintained.

A porous device for optical and electronic applications comprises a single crystal substrate and a porous single crystal structure epitaxially disposed on the substrate, where the porous single crystal structure includes a three-dimensional arrangement of pores. The three-dimensional arrangement may also be a periodic arrangement. A method of fabricating such a device includes forming a scaffold comprising interconnected elements on a single crystal substrate, where the interconnected elements are separated by voids. A first material is grown epitaxially on the substrate and into the voids. The scaffold is then removed to obtain a porous single crystal structure epitaxially disposed on the substrate, where the single crystal structure comprises the first material and includes pores defined by the interconnected elements of the scaffold.

A method of fabricating a semiconductor device is provided. Devices are formed on a core region and a non-core region in a substrate. A strain process is performed to the device on the core region but is not performed to the device on the non-core region.

The invention discloses an introduction-type roughening nitrogen polar surface gallium nitride based light-emitting diode and a manufacturing method thereof. Based on the chip structure of the conventional allium nitride based light-emitting diode, a nitrogen polar surface gallium nitride epitaxial layer with a roughened surface is introduced through diffusion bonding and substrate removal, thereby solving a series of problems and limitations in the existing epitaxial surface roughening technology by using a chemical wet method, improving the light extraction efficiency of the light-emitting diode, keeping the original electrical properties of a chip unchanged, and obtaining the manufacturing yield almost same as the conventional gallium nitride based light-emitting diode.

The invention discloses a preparation method of an epitaxial wafer for FRD, relating to the technical field of a method of depositing a semiconductor material on a substrate. The method comprises the following steps: growing an intrinsic layer on the upper surface of a silicon substrate; fixing the flow of a silicon source, reducing the flow of an injected dopant gradually and increasing the flow of diluted hydrogen gradually at the same time, so as to grow a buffer layer with gradually varying impurity concentration on the upper surface of the intrinsic layer; and growing an epitaxial layer on the buffer layer. According to the method, through controlling the flow, a controllable long-transition-area epitaxial layer with gradually varying epitaxial concentration is formed; therefore, the soft factor of a device can be improved and the original electric property of the device can be maintained.

In a substrate of a liquid crystal display device which forms a bus line which three-dimensionally intersects scanning signal lines, video signal lines and an insulation layer thereon, the present invention facilitates repairs of short-circuiting between the respective signal lines and the bus line. A liquid crystal display device includes a liquid crystal panel which is constituted of a pair of substrates with liquid crystal sandwiched therebetween. Out of the pair of substrates, one substrate includes a bus line which is arranged outside a display region and is electrically connected to a first conductive layer arranged inside the display region, and a plurality of signal lines which three-dimensionally intersect the bus line by way of an insulation layer. The bus line includes opening portions outside intersecting regions where the bus line is overlapped to the signal lines as viewed in a plan view. The opening portions are arranged on both sides of each intersecting region.

The present disclosure regards a method for coupling a graphene layer to a substrate having at least one hydrophilic surface, the method comprising the steps of providing the substrate having at least one hydrophilic surface, depositing on the hydrophilic surface a layer of a solvent selected in the group constituted by acetone, ethyl lactate, isopropyl alcohol, methylethyl ketone and mixtures thereof and depositing on the solvent layer a graphene layer. It moreover regards an electronic device comprising the graphene/substrate structure obtained.

An electrical interconnect including at least one electrically-conductive fibre configured to form a stretchable interlaced configuration.

A touch window includes a substrate, and an electrode part on the substrate. The sensing electrode includes a base substrate formed with a pattern part, and an electrode layer on the pattern part, where the electrode layer has a thickness in a range of 0.03 μm to 3 μm.

A dielectric film is provided which includes a base layer and a capping layer, preferably silicon oxynitride, wherein the film is an effective moisture and ion barrier when disposed between a conductive substrate and a liquid having an electrical potential different than the electrical potential of the substrate.

The invention provides a general halogen-free and flame-retardant low-smoke cable material for sheath and insulation materials. The general halogen-free and flame-retardant low-smoke cable material comprises the following components in parts by weight: 5-10 parts of polyethylene, 10-30 parts of an ethylene-vinyl acetate copolymer, 3-15 parts of an ethylene-octene copolymer, 32-70 parts of a main flame retardant, 0-20 parts of an auxiliary flame retardant, 1-4 parts of a surface activating agent and 2-8 parts of a processing aid. A preparation method comprises the following steps: respectivelyadding the main flame retardant, the auxiliary flame retardant and the surface activating agent into a high-speed mixer; activating at 80-140 DEG C for 5-40 min to obtain a highly active flame-retardant filler; and mixing and granulating the highly active flame-retardant filler with other components in mixing equipment to obtain the halogen-free and flame-retardant low-smoke cable material. The preparation method provided by the invention has the advantages that hydromagnesite is used as the main flame retardant to improve flame retardancy of the cable material and maintain mechanical properties, electrical properties and processing properties of the cable material at the same time on the premise of high filling, i.e., high cost performance.

A stretchable bidirectional capacitive pressure sensor (20) comprising: a first elastomeric sheet (22) made from a dielectric material, with a series of conductor lines (221) located on or in the first elastomeric sheet; a second elastomeric sheet (28) made from a dielectric material, with a series of conductor lines (261) located on or in the second elastomeric sheet; wherein the conductor lines of the first elastomeric sheet are substantially orthogonal to the conductor lines of the second elastomeric sheet; a microstructure comprising a plurality of elastomeric pillars (241) made from a dielectric material, disposed between the elastomeric sheets; wherein the microstructure is bonded to both the first and second elastomeric sheets so that the bidirectional sensor can register positive and negative pressure by the movement of the first and second elastomeric sheets. A further aspect of the invention discloses a method of collecting data related to fluid flow over an object by using a two-dimensional capacitive pressure sensor.