141results about How to "Reduced electrical performance" patented technology

There is disclosed a multilayer insulated wire which comprises a conductor and solderable extrusion-insulating layers made up of two or more layers for covering the conductor, wherein at least one insulating layer is formed by a mixture comprising 100 parts by weight of a resin (A), of at least one selected from the group consisting of polyetherimide resins and polyethersulfone resins, 10 parts by weight or more of a resin (B), of at least one selected from the group consisting of polycarbonate resins, polyarylate resins, polyester resins, and polyamide resin, and 15 to 200 parts by weight of an inorganic filler (C). There is also disclosed a transformer which utilizes the multilayer insulted wire. The multilayer insulated wire is excellent in heat resistance, solderability, high-frequency characteristic, and coilability, and it is favorably suitable for industrial production. Further, the transformer utilizing the multilayer insulated wire is excellent in electrical properties and high in reliability, since when used at high frequencies, electric properties are not lowered and influence by the generation of heat can be prevented.

A semiconductor device and a fabrication method thereof are disclosed. The method includes attaching a wafer with a plurality of chips on a carrier board having an insulating layer, a plurality of conductive circuits and a bottom board; forming a plurality of first grooves between solder pads of adjacent chips to expose the conductive circuits, and filling the first grooves with an insulating adhesive layer; forming second grooves in the insulating adhesive layer; and cutting among the chips to separate the chips from one another.

The present invention is directed to structures having a plurality of discrete insulated elongated electrical conductors projecting from a support surface which are useful as probes for testing of electrical interconnections to electronic devices, such as integrated circuit devices and other electronic components and particularly for testing of integrated circuit devices with rigid interconnection pads and multi-chip module packages with high density interconnection pads and the apparatus for use thereof and to methods of fabrication thereof. Coaxial probe structures are fabricated by the methods described providing a high density coaxial probe.

The preparation process of novel high performance copper-clad PTFE plate includes the following steps: preparing inner layer of glass fiber fabric; preparing outer layer of glass fiber fabric; and cladding copper foil on two sides of the outer layer of glass fiber fabric. The copper-clad PTFE plate of the present invention has excellent electric performance, heat performance and mechanical performance, high bending strength, high size stability and high comprehensive performance.

The invention discloses a method introducing PCB design document from a schematic diagram. The method comprises: performing modular design according to realized function in a schematic diagram designdocument; according to a schematic diagram functional module, respectively and independently associating to the PCB design document; in the PCB design document, respectively according to relevant document generated by the schematic diagram, calling each corresponding functional module from a packaging library in the PCB design document, and putting to the proper position in the PCB design document; trimming to form component position of each functional module to cause the component to be regular and convenient for routing. The invention can shorten time of laying later-stage circuit board components and lower the ratio of making mistakes in the subsequent process of putting components.

The invention discloses an Al-Fe-Cu-Mg aluminum alloy for cables for coal mines, which comprises 0.2-1.1% of Fe, 0.01-0.4% of Cu, 0.01-0.4% of Mg, 0-0.1% of Si, 0-0.2% of B, and the balance of Al and impurities, wherein the electrical resistivity of the aluminum alloy is not greater than 0.028264 Omega.mm<2>/m, the elongation at break is not less than 10%, and the number of times of 90-degree fatigue bending is greater than or equal to 30. An aluminum alloy cable is prepared by the steps of melting, casting and rolling the aluminum alloy material so as to obtain an aluminum alloy rod, carrying out drawing, bunch-stranding and softening on the aluminum alloy rod so as to obtain an aluminum alloy cable core, and carrying out extruded insulation, cabling, extruded sheathing or armoring on the cable core; and the prepared aluminum alloy cable has the characteristics of high strength, high electric conductivity, good bending performance and the like, and can satisfy the requirements on the properties of cables in the field of coal mines.

Embodiments of the invention generally provide a method and apparatus for processing a substrate in an electrochemical mechanical planarizing system. In one embodiment, a contact assembly for electrochemically processing a substrate includes a housing having a ball disposed in a passage formed through the housing. The ball is adapted to extend partially from the housing to contact the substrate during processing. The housing includes a fluid inlet that is positioned to cause fluid, entering the housing through the inlet, to sweep the entire passage. In another embodiment, a method for electrochemically processing includes flowing a processing fluid through a passage retaining a conductive element. The flow sweeps the entire passage of the housing. A first electrical bias is applied to the conductive element in contact with the substrate relative an electrode electrically coupled to the substrate by the processing fluid. After the substrate is separated from the conductive element, flow of processing fluid is continued through the passage past the conductive element.

The single-component silver filled conductive glue capable of being stored and transported at normal temperature consists of flaky silver powder as the main component in 70-75 wt%, and supplementary material including organic carrier comprising epoxy resin and phenolic resin 10-15 wt%, curing agent dicyan diamine 0.5-1 wt%, curing promoter carbamide 0.1-0.3 wt%, and diluent mixture of dimethyl adipate, dimethyl glutarate and dimethyl succinate 9-15 wt%. The conductive glue of the present invention is used as the connecting material to replace solder for adhering printed circuit board as well as SMT, quartz resonator, chip, etc. It has excellent conducting performance, high adhesion, easy transportation and storing, and capacity of forming bright and fine cured spot.

A parasitic capacitance-preventing dummy solder bump structure on a substrate has at least one conductive layer formed on the substrate, a dielectric layer employed to cover the conductive layer, an under bump metallurgy layer (UBM layer) formed on the dielectric layer, and a solder bump formed on the UBM layer.

The invention belongs to the technical fields of functional polymer materials and electrochemistry and in particular relates to a preparation method of a pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as a base. The preparation method of the pore-filing type proton exchange membrane taking the double ether crosslinked porous polybenzimidazole imide as the base comprises the following steps: firstly synthesizing polybenzimidazole imide provided with a cross-linkable imidazole group on a main chain, preparing the synthesized polybenzimidazole imide into a membrane solution, adding a double ether crosslinking agent, reacting with the imidazole group, a crosslinking sulfonated polyimide polymer in a membrane forming process, adding a pore-forming agent at the same time to form a crosslinked porous polybenzimidazole imide membrane, and finally compounding the crosslinked porous polybenzimidazole imide membrane with perfluorosulfonate resin, so that the pore-filling type proton exchange membrane is obtained. A basement membrane gives good mechanical properties to the pore-filling type membrane, and the pore-filling type membrane has high dimensional stability; meanwhile, the proton conductivity of a perfluorosulfonate membrane is not greatly reduced. The preparation method of the pore-filing type proton exchange membrane taking the double ether crosslinked porous polybenzimidazole imide as the base has the advantages that the preparation technology controllability is good; and compared with the traditional perfluorosulfonate membrane, the obtained pore-filling type proton exchange membrane has high mechanical strength and good dimensional stability and has broad application prospect in a polymer electrolyte membrane fuel cell.

The invention discloses an electric wire and cable for a high-speed train and a production method. The electric wire and cable have the advantages that high-low temperature resistance is achieved, the structure is stable, oil resistance is good, low smoke zero halogen flame retarding is achieved, and electrical performance and mechanical physical performance are good. The electric wire and cable for the high-speed train comprise a conductor. An isolation layer is arranged outside the conductor. An inner insulation layer and an outer insulation layer are arranged outside the isolation layer in a double-layer-co-squeezing mode. The inner insulation layer is formed by 150 DEG C irradiation crosslinked polyethylene. The outer insulation layer is formed by 150 DEG C irradiation crosslinked oil-resisting low smoke halogen-free flame retardant polyolefin. The production method of the electric wire and cable for the high-speed train comprises the steps that the conductor is subjected to lapping to form the isolation layer; insulation layer squeezing is carried out, and irradiation crosslinking processing is carried out, wherein the inner insulation layer is formed by 150 DEG C irradiation crosslinked polyethylene, the outer insulation layer is formed by 150 DEG C irradiation crosslinked oil-resisting low smoke halogen-free flame retardant polyolefin, and insulation materials of the inner insulation layer and the outer insulation layer are subjected to modification processing by radiation crosslinking.

The embodiment of the invention provides a silk-screen printing method for a positive electrode of a solar battery, comprising the steps of: providing a silk-screen printing substrate; cutting the silk-screen printing substrate into a proof printing sheet according to the same size and thickness with a silicon wafer to be printed; performing proof printing on the proof printing sheet to obtain a proof printing electrode; judging whether the proof printing electrode obtained by performing proof printing on the proof printing sheet meets the predetermined demand; if so, determining a parameter which is used in the process of performing proof printing on the proof printing sheet to obtain the proof printing electrode, as a silk-screen printing parameter; and performing a silk-screen printing operation on a front side of the silicon wafer to be printed according to the silk-screen printing parameter. Compared with the prior art, the method avoids reduction of electrical properties caused by performing the silk-screen printing operation on the silicon wafer to be printed directly or performing multiple silk-screen printing operations, therefore, the overall property of the solar battery formed with the positive electrode is improved.

The invention relates to a method for realizing the light transmission of a thin film solar module by using vibrating mirror laser equipment and belongs to the technical field of thin film solar batteries. The technical scheme is that: the method comprises the following steps of: depositing a front transparent conductive electrode, a thin film photoelectric conversion layer and a back conductive electrode on an insulation light transmission substrate; cutting off the three layers of thin films by adopting laser devices having different wavelengths so as to form insulation regions having different sizes and length-to-width ratios; and removing the three layers of thin films from the insulation regions by using laser scribing equipment with a vibrating mirror system, and scribing a pattern by changing an angle of a vibrating mirror and the magnitude of laser energy and switching laser on/off in real time, wherein film layers outside the insulation regions can realize a power generation function; at positions, where front glass is exposed out of, inside the insulation regions, light rays can be transmitted through the battery directly, so that a light transmission function of the module is realized. By the method, the preparation of a novel light transmission solar module is realized; the output electric performance and the light transmission performance of the thin film solar module are higher than those of the thin film solar module prepared in the prior art; and the method has the characteristics of low cost, high working efficiency, simple operation, diversified light transmission images, simple implementation and the like.

The invention discloses Al-Fe-Cu-Mg-Ag aluminum alloy for coal cables. The aluminum alloy comprises the following components in percentage by weight: 0.2-1.1% of Fe, 0.01-0.4% of Cu, 0.01-0.4% of Mg, 0.001-0.1% of Ag, 0-0.1% of Si, 0-0.2% of B and the balance of Al and impurities, wherein the electrical resistivity of the aluminum alloy is no greater than 0.028264ohm.mm<2>/m, the breakage elongation of the aluminum alloy is no less than 10%, and the fatigue bending times of the aluminum alloy at 90 degrees is greater than or equal to 30; the aluminum alloy material is smelted, cast and rolled, thereby obtaining an aluminum alloy rod; the aluminum alloy rod is pulled, bunch-stranded and softened, thereby obtaining an aluminum alloy cable core; the cable core is subjected to extruded insulation, cabling and extruded sheathing or armoring, thereby obtaining an aluminum ally cable. The prepared aluminum ally cable has the characteristics of high strength, high conductivity, good bending property and the like, and the requirements of the coal field on the property of cables can be met.

The invention discloses a lithium ion battery maximum electrolyte injection volume quick evaluation method. The electrolyte containing rate of a positive plate, the electrolyte containing rate of a negative plate and the electrolyte containing rate of a diaphragm are measured firstly; the volume of the electrolyte absorbed by each is calculated according to the electrolyte containing rate; the spare volume Vspare of the inner cavity of a battery shell is measured; the correction coefficient eta of the volume of the void for containing the electrolyte of a cathode mix is then detected; and the total electrolyte injection volume m<electrolyte>=( Vspare+Vvoid*eta)*rho of the battery is finally calculated. The evaluation method is simple to operate, the result is accurate, the debugging time is shortened, influences on the device precision and the production by frequent device debugging are avoided, falling of the electric performance of the battery caused by insufficient electrolyte injection volume can be avoided, and accurate design parameters are provided for the electrolyte injection volume of the battery.

The invention relates to a Sn-Au eutectic based chip partial vacuum packaging method of a resonance type pressure sensor. In the method, a Sn/Au layer is deposited by electroplating and sputtering, isothermy solidification and eutectic reaction of gold-tin alloy when heated are used to realize partial vacuum packaging, and the yield of the partial vacuum packaging can be raised to 99%. Compared with conventional tin-lead eutectic sintering and silicon glass partial vacuum packaging methods, the method has the advantages of excellent thickness uniformity of the Sn/Au layer, improved service life of a sensor chip and the like and is a novel chip partial vacuum packaging method. The invention is applicable to the field of a movable part partial vacuum packaging of a microelectro mechanical system (MEMS).

The invention discloses Al-Fe-Cu-Mg aluminum alloy and an electric wire made of the same. The aluminum alloy comprises the components of 0.2-0.4wt% of Fe, 0.3-0.5wt% of Cu and Mg and the allowance of Al and impurities. The specific resistance of the aluminum alloy is not larger than 0.02800 omega*mm<2>/m, the breaking elongation is not lower than 10%, and the average creep speed within 1-100 hours is 5 * 10-2(%/h) or lower under the condition of the temperature of 120 DEG C and the pressure stress of 120 MPa. Stress concentration cannot happen during a cold-drawing micro-pulling machining process so that an aluminum alloy rod cannot be broken, and after wire drawing, the diameter of an aluminum alloy conductor single wire can reach 0.3mm.