35results about How to "Improve electrical durability" patented technology

An image pickup apparatus including a lens barrel, a hollow shaft, a base, electric wiring, and a protection member. The lens barrel has a lens and an image pickup device embedded therein. The hollow shaft is rotatable about an axis intersecting with an optical axis of the lens. The axis serves as a central axis of the hollow shaft. The base supports the lens barrel in a rotatable manner by using the hollow shaft. The electric wiring extends through the inside of the hollow shaft to electrically transmit an image pickup signal of the image pickup device. The protection member is provided in the hollow shaft so as to prevent the electric wiring from coming into contact with the hollow shaft.

The present invention provides an organic electroluminescent device exhibiting a long life, a high luminance, and a high efficiency.An organic electroluminescent device comprising on a substrate an anode, a hole transport layer, an organic light-emitting layer, and a cathode, wherein the organic light-emitting layer contains an organic compound having a pyridine ring, a pyrazine ring, or a triazine ring as a partial structure and the hole transport layer contains a monoamine compound represented by the following formula (I):wherein R1 to R9 represent a hydrogen atom, an aryl group, or an alkyl group; R1 to R9 may be the same or different from each other; and R1 to R9 may further have an aryl group or an alkyl group as a substituent in the case where R1 to R9 are an aryl group or an alkyl group.

Embodiments of the invention provide a read head which is implemented in a magnetic disk drive that supports a high recording density and a high transfer rate and is excellent in static electricity durability. In one embodiment, a magnetic head wherein a charge diffuses from a read element to a slider at a time constant of about 100 ms or less.

PROBLEM TO BE SOLVED: To provide a conductive paste capable of forming a conductive film having good conductivity and excellent durability, and to provide a substrate with a conductive film formed by using such a conductive paste.SOLUTION: The conductive paste contains (A) metal particles having a volume resistivity of 10 μ&OHgr; cm or less and an average particle diameter of 1-15 μm, (B) base metal particles having an average particle diameter of 0.1-3 μm and an oxidation-reduction potential of -440 to 320 mV (SHE), and (C) a binder resin. The base metal particles as the component (B) are contained in an amount of 0.01-3 pts.mass based on 100 pts.mass of the metal particles as the component (A).

An electrode laminate unit of an electric storage device includes positive electrodes, negative electrodes and a lithium electrode connected to the negative electrode. When an electrolyte solution is injected into the electric storage device, lithium ions are emitted from the lithium electrode to the negative electrode. A positive and a negative electrode current collector have through-holes that guide the lithium ions in the laminating direction. The aperture ratio of the through-holes at the edge parts where the electrolyte solution is easy to be permeated is set to be smaller than the aperture ratio at central parts in order to suppress the permeation. Thus, the distribution of the electrolyte solution is made uniform, whereby the doping amount is made uniform.

The invention discloses a method for preparing polyaniline composite nano silver conductive fibers. The method comprises the following steps of: 1) preparation of a conductive coating solution, preparing polyaniline particles ground by a mortar and formic acid solutions of different mass fractions into the conductive coating solution, wherein the mass fractions of the formic acid solutions are 60 to 80 percent; 2) preparation of coated conductive fibers: coating the conductive coating solution on the surface of fibers by adopting a roller type fiber coating machine to prepare the coated conductive fibers, and washing and drying the coated conductive fibers to obtain conductive fibers; and 3) in-situ synthesis of a nano silver-polyaniline layer: soaking the conductive fibers A into 0.1 to 1.0mol / L aqueous solution of silver nitrate (AgNO3) for 0.5 to 2 hours, soaking the conductive fibers A into 0.2 to 2 mol / L aqueous solution of NaBH4, reacting for 6 to 10 hours at room temperature, washing by using ethanol and deionized water respectively, performing natural airing or drying, and thus obtaining the polyaniline / nano silver composite conductive fibers. The conductive fibers have high electric conductivity, the electric conductivity of the fibers can be regulated by controlling the process conditions, and different electric conductivity requirements are met.

The development of stretchable, mechanically and electrically robust interconnects by printing an elastic, silver-based composite ink onto stretchable fabric. Such interconnects can have conductivity of 3000-4000 S / cm and are durable under cyclic stretching. In serpentine shape, the fabric-based conductor is enhanced in electrical durability. Resistance increases only ˜5 times when cyclically stretched over a thousand times from zero to 30% strain at a rate of 4% strain per second due to the ink permeating the textile structure. The textile fibers are ‘wetted’ with composite ink to form a conductive, stretchable cladding of the silver particles. The e-textile can realize a fully printed, double-sided electronic system of sensor-textile-interconnect integration. The double-sided e-textile can be used for a surface electromyography (sEMG) system to monitor muscles activities, an electroencephalography (EEG) system to record brain waves, and the like.

In the present invention, a method of preparing Ag-based oxide contact materials with directionally arranged reinforcing particles is disclosed, comprising steps of: a) preparing evenly dispersed composite powders by chemical co-precipitation method combining with roasting, b) granulating the composite powders by high energy ball milling, and sieving the powders, c) mixing the powders and Ag matrix in a powder mixing machine, d) cold isostatic pressing, e) sintering, f) hot-pressing, g) hot-extruding to obtain Ag-based oxide contact materials with directionally arranged reinforcing particles. This method can obtain particle reinforced Ag-based material with good electrical performance even when the reinforced (oxide) particles are very small. This method is simple, easy to operate, and does not require special equipment. The resistance to welding and arc erosion, electric conductivity and the processability of the material prepared through this present invention can be greatly improved.

A conductive rubber roller comprising a conductive core material and provided thereon a rubber layer; the rubber layer being formed by using a rubber composition containing as rubber components at least a polar rubber and an ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer; the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer having a melt peak temperature of from 20 to 30 DEG C. and a melt enthalpy change DeltaH of from 40 to 70 mJ / mg as measured with a differential scanning calorimeter; and the allyl glycidyl ether in the ethylene oxide-propylene oxide-allyl glycidyl ether terpolymer being in a copolymerization ratio of from more than 10 mol % to 20 mol % or less.

The invention relates to high-strength conductive fibers and particularly relates to a preparing method of a polyacrylonitrile-based high-strength conductive fiber. The method includes 1) preparing a polyacrylonitrile fiber by adopting acrylonitrile and vinyl acetate as raw materials, 2) subjecting the prepared fiber to high-temperature drafting, 3) processing the fiber subjected to high-temperature drafting in saturated low-pressure vapor, 4) putting the fiber processed in the saturated low-pressure vapor to a sodium hydroxide solution, washing and drying, 5) putting the dried fiber into an aqueous solution of a copper salt, heating to 50-60 DEG C, adding a sodium thiosulfate solution, heating to 70-80 DEG C, maintaining the temperature for 30-40 min, adding a sodium thiosulfate solution again, heating to 100-105 DEG C, and maintaining the temperature for 1-1.5 h, and 6) after the temperature maintaining is finished, washing, oiling, dehydrating and drying. The polyacrylonitrile-based high-strength conductive fiber prepared by the method is stable in conductivity, good in conductive durability and high in strength.

Provided are a low-resistance chip resistor having a simple structure in which self-independence is given and the mechanical strength is increased for durability, and an easier and faster method of manufacturing same.  A low-resistance chip resistor characterized in that resistive layers are formed on both the front and back surfaces of an insulating substrate, or insulating substrates are formed on both the front and back surfaces of a resistive layer, that in the former, protective films are formed on the central portions of the resistive layers in the longitudinal direction and surface and back electrodes are formed on the resistive layers on both sides of the protective films, and in the latter, surface and back electrodes are formed on the resistive layers on both sides of the substrates, and that in both the former and latter, end surface electrodes are provided at both ends in the width direction.