2498results about "Capacitor manufacture" patented technology

A method of etching polysilicon includes exposing a substrate comprising polysilicon to a solution comprising water, HF, and at least one of a conductive metal nitride, Pt, and Au under conditions effective to etch polysilicon from the substrate. In one embodiment, a substrate first region comprising polysilicon and a substrate second region comprising at least one of a conductive metal nitride, Pt, and Au is exposed to a solution comprising water and HF. The solution is devoid of any detectable conductive metal nitride, Pt, and Au prior to the exposing. At least some of the at least one are etched into the solution upon the exposing. Then, polysilicon is etched from the first region at a faster rate than any etch rate of the first region polysilicon prior to the etching of the at least some of the conductive metal nitride, Pt, and Au.

A method for manufacturing a wiring board which can simplify a manufacturing step. In a preparation step, a core board and an electronic component are prepared. In an insulating layer formation and fixing step, after accommodating the electronic component in an accommodation hole, a lowermost resin insulating layer is formed, and a gap between the electronic component and the core board is filled with a part of the lowermost resin insulating layer so as to fix the electronic component to the core board. In an opening portion formation step, a portion of the lowermost resin insulating layer located directly above the gap between the electronic component and the core board is removed so as to form an opening portion exposing a part of a core board main surface side conductor and a component main surface side electrode. In a main surface side connecting conductor formation step, a main surface side connecting conductor is formed in the opening portion so as to connect the core board main surface side conductor to the component main surface side electrode.

A temperature of an electrolytic capacitor 24 incorporated in equipment is detected, a remaining lifetime in actual use is calculated based on a temperature-lifetime law, and the remaining lifetime is indicated. A thin film tape 23 is wound around a temperature sensor 22 for insulation, and the electrolytic capacitor 24 and the temperature sensor 22 are accommodated in a heat-shrinkable tube 25, the secondary temperature sensor 22 is brought into tight contact with the primary electrolytic capacitor 24.

In a manufacturing method for a monolithic ceramic electronic component, a plurality of green chips arrayed in row and column directions which are obtained after cutting a mother block are spaced apart from each other and then tumbled, thereby uniformly making the side surface of each of the green chips an open surface. Thereafter, an adhesive is applied to the side surface. Then, by placing a side surface ceramic green sheet on an affixation elastic body, and pressing the side surface of the green chips against the side surface ceramic green sheet, the side surface ceramic green sheet is punched and stuck to the side surface.

There is provided a multilayer ceramic capacitor including a ceramic body having first and second side surfaces opposing each other and third and fourth end surfaces connecting the first and second side surfaces, first and second internal electrodes formed in the ceramic body and having one ends exposed to the first and second side surfaces and the third end surface or exposed to the first and second side surfaces and the fourth end surface, first and second external electrodes formed on an outer side of the ceramic body and electrically connected to the first and second internal electrodes, and a plating layer partially formed on certain regions of the first and second external electrodes, wherein a polymer layer is additionally formed on the ceramic body on regions of upper portions of the first and second external electrodes on which the plating layer is not formed.

A circuit element the presence of the circuit element includes first and second capacitor plates disposed over the surface of the substrate in an aligned relationship with each other. The aligned relationship has manufacturing variations in the relative positioning of the first and second capacitor plates and a dielectric layer disposed between the first and second capacitor plates. At least one of the first and second capacitor plates is formed substantially smaller relative to the other of the first and second capacitor plates. The at least one of the capacitor plates is disposed at a predetermined offset in at least one planar direction from an edge of the other of the first and second capacitor plates. The predetermined offset is selected according to the manufacturing variations to prevent variations in the value of capacitance of the capacitor due to the manufacturing variations.

Provided is an abnormality detecting device for detecting an abnormality of electric storage devices such as a battery pack. Comparators (140-1) to (140-n) detect a time when a voltage reaches a prescribed voltage, for each block of a battery pack (100). A judging section (160) detects a current at a time when the voltage reaches the prescribed voltage, and a representative current value is calculated for each block. The deviation of the representative current value of each block is compared with the threshold value, and when the deviation is large, it is judged that there are abnormalities such as short-circuiting, minute short-circuiting, IR (internal resistance) increase, capacitance reduction, and the like.

Embodiments described herein generally relate to an electrode structure for an electrochemical battery or capacitor, particularly, apparatus and methods of creating a reliable and cost efficient 3D electrode nano structure for an electrochemical battery or capacitor that has an improved lifetime, lower production costs, and improved process performance.

An apparatus and method to detect failure of an electrolytic capacitor that smoothes a DC voltage in an inverter circuit. The apparatus detects failure of a smoothing electrolytic capacitor in a motor drive inverter circuit that rectifies and smoothes an AC voltage through a rectifier and the smoothing electrolytic capacitor and converts a rectified and smoothed DC voltage into a 3-phase voltage to drive a motor. The apparatus includes a voltage meter, a current sensing unit, and a controller. The voltage meter measures a DC voltage of an inverter when the motor is not in operation. The current sensing unit measures a phase current of the motor when the motor is not in operation. The controller estimates an ESR value of the smoothing electrolytic capacitor from the DC voltage of the inverter and the motor phase current to detect failure of the smoothing electrolytic capacitor.

A chip type capacitor which has improved bond strength between an anode lead wire and an anode terminal and enhanced reliability, and a method for preparing the chip type capacitor and an anode terminal. The chip type capacitor has a solid electrolytic capacitor element including an element body having an anode body, a dielectric and a cathode body, and an anode lead wire partially extending from the anode body of the element body. An anode terminal is electrically connected to the portion of the anode lead wire extending from the anode body. This extending portion of the anode lead wire has about 75% or more of its periphery, in the direction substantially perpendicular to the extending direction of the anode lead wire, covered with solidified matter resulting from solidification of a melt, thereby bonding the anode terminal and the anode lead wire to each other.

The invention relates to a porous carbon electrode materials and the preparation method, belonging to the electrochemistry and the novel energy source materials, wherein the porous carbon electrode materials adopt the template carbonization and the method combined with the CO2 post-processing using the meso-porous oxide silicon as the remplate, and the cane sugar, furfuryl alcohol, polyacrylonitrile and the like as the precursors, through the technology steps of the liquid phase impregnation, the high temperature carbonization and the template removal and the like, then combines high temperature process, obtaining the super capacitor porous carbon electrode materials. The porous carbon electrode materials prepared by the method has high surface area, large pore volume, adjustable pore structure and multilevel-microporous pore structure, wherein the pore channel is composed of a meso-porous of 2-5 nm and the microporous with the meso-porous wall of 0.1-2 nm, so the electrochemistry capacity of the prepared porous carbon electrode is marked increased, and the integral property of good.

The invention provides a novel lithium pre-embedding method of a lithium ion capacitor. The method comprises the following steps that (1) a battery cell is assembled, and is soaked into an organic solution containing lithium salts; (2) a positive electrode and a negative electrode are respectively connected with a charging and discharging test instrument, and once discharging after once charging is used as a cycle, 1 to 1000 times of cycles are totally carried out, and the lithium pre-embedding on the negative electrode is completed; (3) the battery cell after the lithium pre-embedding completion is taken out and is put into a packaging case, the packaging case is filled with electrolyte and is assembled into a lithium ion capacitor single body. When the method is adopted, the problem of too high cost due to lithium metal, porous current collectors and the like can be effectively solved, the safety can be improved, the technical flow process can be simplified, and the method is applicable to industrial production.

In one aspect, a method of manufacturing a capacitor includes disposing one or more conductive layers of a first electrode stack in a recess of an alignment mechanism, where the recess is positioned relative to two or more alignment elements. The method further includes placing a separator over the one or more conductive layers where an outer edge of the separator contacts the two or more alignment elements. In one embodiment, a capacitor includes anode and cathode foils having offsetting edge portions. In one embodiment, a multiple tab cathode for a flat capacitor. A plurality of cathode tabs are portioned into a plurality of cathode tab groups positioned in different locations along the edge of the capacitor stack to reduce the amount of space required for connecting and routing the cathode tabs.

A method of production of a ceramic electronic device such as a multilayer ceramic capacitor, comprising forming a first ceramic coating layer on the surface of a substrate, forming an internal electrode on the surface of the first ceramic coating layer, then forming a second ceramic coating layer on the surface of the first ceramic coating layer so as to cover the internal electrode. In this case, when a mean particle size of ceramic particles of the first ceramic coating layer is alpha1, a thickness of the first ceramic coating layer is T1, a mean particle size of ceramic particles of the second ceramic coating layer is alpha2, and a thickness of the second ceramic coating layer is T2, the conditions of alpha1<=alpha2, 0.05<alpha1<=0.35 mum, T1<T2, and 0<T1<1.5 mum are satisfied. As a result, it is possible to provide a ceramic electronic device, in particular a multilayer ceramic capacitor, resistant to short-circuit defects, withstand voltage defects, and other structural defects.

The invention discloses a composite carbon-based electrode material used for super capacitors and its preparing method, and it is composed of nano metals, nano metal composite oxide, activated carbon and nano carbon fiber, effectively using the activated carbon with high specific surface area and the nano carbon fiber to provide a double electric layer capacitor for a super capacitor, combining a Faraday quasi-capacitor provided by the nano metal oxide, and at the same time using the high electric conductivity of the nano carbon fiber and nano metals and the nano cooperation effect, thus increasing its capacitor and power densities and able to obtain the super capacitors with high energy and power densities, and the invention is low-cost and easy for commercial application.

The method of manufacturing laminated super capacitor includes such steps: coating mixed pulp prepared from carbon active material, conducting agent, cementing material, and solvent onto surface of metal body of collecting current by using flow casting machine or coating mould; carrying out rolling, drying and cutting operations on automatic temperature-controlled reduction roller mill so as to obtain electrode in carbon active material; single super capacitor is made after stacking bodies of collecting current of positive and negative electrode as well as porous isolation membranes, then adding electrolyte and sealed; cascaded and paralleled more single capacitor produces super capacitor with higher voltage and high capacity. The invented capacitor provides features of high power density, stable cycle performance and low expansivity of electrode.

Disclosed is a method for manufacturing an electrode for an electrochemical element, that is capable of forming an electrode active material layer on a current collector, particularly a perforated current collector having through-holes extended from the obverse surface to the reverse surface thereof, such as a punching metal or an expanded metal, simply, evenly and with good adhesion. The method is characterized by comprising the steps of (1) forming an electrode active material layer on a surface of a base material by using an electrode composition containing an electrode active material, an electroconductive material, and a binder, (2) laminating a current collector on the electrode active material layer formed on the surface of the base material, followed by hot pressing to bond the electrode active material layer and the current collector to each other, and (3) separating the base material from the electrode active material layer.