Abstract: The present invention provides electrolytes for use in electronic devices at temperature below ?50° C. consisting of a mixture, eutectic or tereutectic of at least two low viscosity aprotic solvents, acetonitrile, and a mixture of conductive salts having a molecular weight up to 240.

Abstract: A niobium solid electrolytic capacitor comprises: an anode mainly made of niobium and containing nitrogen and at least one kind of alloying element whose hardness is higher than that of niobium; a dielectric layer provided on a surface of the anode and containing nitrogen; an electrolyte layer provided on the dielectric layer and formed of a conductive polymer; and a cathode layer provided on the electrolyte layer. The electrolyte layer has a three-layered structure formed of a first electrolyte layer, a second electrolyte layer, and a third electrolyte layer, which are arranged in this order between the dielectric layer to the cathode layer. The second electrolyte layer and the third electrolyte layer contain alkyl substituted aromatic sulfonate. Conductivities of the respective electrolyte layers increase in order of the first electrolyte layer, the second electrolyte layer, and the third electrolyte layer.

Abstract: A metal capacitor in which an electric conductivity is significantly improved by applying a metal material for an electrolyte and a manufacturing method thereof is provided.

Abstract: The mounting board has a capacitor-forming sheet made from a valve metal, first and second board-forming structures, first and second electrodes, an extractor electrode, and a conductive polymer. The capacitor-forming sheet has an inner layer and a rough oxide film on at least one face of the inner layer. The first board-forming structure is provided on a face of the capacitor-forming sheet, and the second board-forming structure is provided on another face thereof on a side opposite to the first one. The first and second electrodes are isolated to each other and provided on a surface of at least one of the first and second board-forming structures. The extractor electrode and conductive polymer are provided inside at least one of the first and second board-forming structures. The extractor electrode electrically-connects the first electrode with the inner layer. The conductive polymer electrically-connects the second electrode with the rough oxide film.

Abstract: The invention relates to a substrate for solid electrolytic capacitor and a method for producing solid electrolytic capacitors using the substrate. By reducing at least part of the porous layer on the surface between the anode part region and the cathode part region of the substrate and preferably filling the dent generated by the reduction with a masking material, a structure ensuring insulation between the anode and the cathode can be obtained and solid electrolytic capacitors excellent in leakage current property and reliability can be obtained.

Abstract: Electrolytic capacitors are provided having an airtight housing, electrodes immersed in an electrolytic solution, electrical contacts connected to the electrodes, and a device for sorption of harmful substances. The device is made of a multilayer polymeric sheet (10), which is formed of an inner layer (12) of polymeric material, containing particles of one or more getter materials (11) for sorption of the harmful substances, and at least one protective layer (13) of a polymeric material impermeable to the electrolyte. All of the polymeric materials are permeable to the harmful substances.

Abstract: The present invention provides a conductive polymer suspension for providing a conductive polymer material having a high conductivity and a method for producing the same, and in particular, a solid electrolytic capacitor having a low ESR and a method for producing the same. The conductive polymer suspension can be is produced by: synthesizing a conductive polymer by chemical oxidative polymerization of a monomer giving the conductive polymer by using an oxidant in an aqueous solvent containing a dopant consisting of a low-molecular organic acid or a salt thereof, or a polyacid having a weight average molecular weight of less than 2,000 or a salt thereof.

Abstract: [Problems] To provide an electric element which generates less heat even when its components are miniaturized and it carries a large amount of current, decreases the impedance by decreasing the inductance and is effective over high frequencies. [Means for Solving Problems] A composite electric element comprises a solid electrolytic capacitor and an electric element disposed on the solid electrolytic capacitor. A conductive plate, which is less resistive than an internal conductive layer, is connected to and covers the composite electric element. A current from a power source and its return current from an electric load flow across the internal conductive layer of the composite electric element in opposite directions. The composite electric element is disposes on a surface of a module substrate, and a slit is provided on the ground so that more current flows inside the electric element in opposite directions.

Abstract: An aspect of the invention provides a solid electrolytic capacitor that comprises: a capacitor element comprising: an anode; a dielectric layer formed above the anode; an electrolyte layer formed above the dielectric layer; and a cathode layer formed above the electrolyte layer; an anode lead frame electrically connected to the anode; a cathode lead frame electrically connected to the capacitor element; and a conducting adhesive layer, containing thermally expandable graphite. Electric current flows through the capacitor element to the conducting adhesive layer.

Abstract: One embodiment includes a first capacitor stack including a first plurality of substantially planar anodes and a first plurality of substantially planar cathodes, a second capacitor stack including a second plurality of anode layers and a second plurality of cathode layers, an interconnect coupling the first capacitor stack and the second capacitor stack electrically in parallel, the interconnect adapted to permit rotation of the first capacitor stack with respect to the second capacitor stack, wherein the first capacitor stack and the second capacitor stack are adapted to deliver a defibrillation pulse to the anode terminal and the cathode terminal at a voltage of from approximately 410 volts to approximately 610 volts.

Abstract: A process for forming a laminate with capacitance and the laminate formed thereby. The process includes the steps of providing a substrate and laminating a conductive foil on the substrate wherein the foil has a dielectric. A conductive layer is formed on the dielectric. The conductive foil is treated to electrically isolate a region of conductive foil containing the conductive layer from additional conductive foil. A cathodic conductive couple is made between the conductive layer and a cathode trace and an anodic conductive couple is made between the conductive foil and an anode trace.

Abstract: The present invention provides: a dopant solution for an electroconductive polymer characterized in that it comprises at least one selected from the group consisting of alkylamine salts and imidazole salts of benzene skeleton sulfonic acids and naphthalene skeleton sulfonic acids, having at least one OH group and at least one sulfonate group, at a concentration of 40 mass % or more; an oxidant and dopant solution for an electroconductive polymer including a mixture of the organic salt of the dopant as mentioned above, and a persulfate organic salt as an oxidant; an electroconductive composition including an electroconductive polymer prepared by using the oxidant and dopant solution as mentioned above; and solid electrolytic capacitor using the electroconductive composition as a solid electrolyte. The electroconductive composition has an improved electric conductivity, and the solid electrolytic capacitor has an improved reliability for a long time.

Abstract: An electronic component includes a functional element, first and second collectors joined to the functional element, and an outer package integrally covering the functional element and the first and second collectors. The functional element has first and second end surfaces having circular shapes and a side surface having a cylindrical shape extending along a center axis. The element includes first and second electrode foils rolled about the center axis and exposed from the first and second surfaces, respectively. The outer package has first and second surfaces parallel to the first and second end surfaces of the functional element, and has first to fourth corners as seen from a direction of the center axis. The first corner is adjacent to the second corner. The first and second terminals are arranged at the first and second corners of the outer package, respectively. This electronic component can have a small size and a small height while reducing its equivalent series resistance.

Abstract: A wet electrolytic capacitor that includes a plurality of anodes, cathode, and working electrolyte that is disposed in electrical contact with the anodes and current collector is provided. Any number of anodes may generally be employed, such as from 2 to 40, in some embodiments from 3 to 30, and in some embodiments, from 4 to 20. The anodes are thin and typically have a thickness of about 1500 micrometers or less, in some embodiments about 1000 micrometers or less, and in some embodiments, from about 50 to about 500 micrometers. By employing a plurality of anodes that are relatively thin in nature, the resulting wet electrolytic capacitor is able to achieve excellent electrical properties.

Abstract: An electrolytic capacitor is constructed as a stacked structure of alternating anode and cathode plates. A clip is fitted over a peripheral portion of each cathode plate, the clips being welded together to electrically connect the cathode plates in common. The dimensions of the clips are such that the clips take up approximately the same space away from the edges of the cathode plates as the thickness of the anode plate on each side of a cathode plate when the anode and cathode plates are stacked upon one another.

Abstract: A solid electrolytic capacitor (A1) includes a first and a second anode terminals (11a, 11b) projecting in different directions from each other. Preferably, a metal cover (22) for electrically connecting the anode terminals (11a, 11b) to each other is provided. With such an arrangement, the ESR and the ESL can be reduced, and the high frequency characteristics can be enhanced.

Abstract: An electrical component, which contains an electrode with an electrically conductive body having a dielectric surface. An amorphous layer comprising SiO2, having a specific surface area of approximately 50 to 500 m2/g, is arranged on the body. An electrically conductive coating is arranged on the amorphous layer. A solid electrolyte capacitor is an electrical component of this type in which, for example, the electrode is connected as the anode and the electrically conductive coating is connected as the cathode.

Abstract: A porous electrolytic solution reservoir which is capable of being impregnated with an electrolytic solution is provided in an exterior case so as to make contact with a separator. The average diameter of the pores in the electrolytic solution reservoir is greater than the average diameter of pores in the separator. The electrolytic solution reservoir is impregnated with a predetermined amount of electrolytic solution, so that the occupation ratio of electrolytic solution within the pores in the separator becomes 50% or more when fully charged, and the occupation ratio of electrolytic solution within the pores in the electrolytic solution reservoir becomes 100% or less when fully discharged.

Abstract: The present invention relates to a solid electrolytic capacitor and a method for preparing the same. There is provided a solid electrolytic capacitor in accordance with the invention including a capacitor element with anode polarity therein and a cathode layer formed on an outer surface thereof; an anode wire with an end portion protruding on one surface of the capacitor element; a cathode lead layer formed on the other surface the capacitor element; a molding part surrounding the capacitor element to expose the protruding end portion of the anode wire and an end portion of the cathode lead layer; and an anode terminal and a cathode terminal formed by a plating layer at both sides of the molding part. It is possible to save preparation cost by simplifying a structure and a preparation process of the solid electrolytic capacitor.

Abstract: A radial lead aluminum electrolytic capacitor comprises a wound unit, a case provided with an opening and containing the wound unit impregnated by electrolyte and a seal for sealing up the opening of the case. The wound unit comprises: a cathode foil which is a cathode formed foil; an anode foil; a first separator; a second separator; a first lead wire stitched to the cathode foil; and a second lead wire stitched to the anode foil; and is formed by winding a lamination made by these elements. Gasket formed foil(s) may be arranged at the stitching places of the first lead wire and the second lead wire or only at a stitching place of the first lead wire. The radial lead aluminum electrolytic capacitor is resistant to inverse voltage and higher temperature, and sequentially resistant to high ripple current and has more times of charging/discharging.

Abstract: The invention relates to a process for preparing polythiophene dispersions or for in situ deposition of polythiophenes. The dispersion is prepared by oxidative polymerizing of a thiophene or thiophene derivative, wherein an oxidizing agent is used and is at least one organic peroxidic compound excluding diacyl peroxide. The invention also relates to the use of specific organic peroxides as oxidizing agents in the oxidative polymerization of thiophenes. The invention further relates to a process to process a conductive layer and the use of the conductive layer.

Abstract: An electrolytic capacitor employs a capacitor element wherein an anode foil having an anode internal terminal and a cathode foil having a cathode internal terminal are wound or laminated through a separator. The end of the anode foil faces the cathode foil through the separator and the surface area of the cathode internal terminal is provided with an enlargement treatment, whereby the small area portion of the cathode foil that faces with the anode foil is eliminated, improving the charge/discharge characteristics. Furthermore, in the electrolytic capacitor provided with the capacitor element wherein the anode foil having the anode internal terminal and the cathode foil having the cathode internal terminal are wound or laminated through the separator, the capacitor element being impregnated with an electrolyte, the cathode internal terminal includes an aluminum material, the surface of the cathode internal terminal is etched and iron concentration in the etching layer <300 ppm.

Abstract: An hybrid capacitor includes an electrically non-conductive rigid or semi-rigid porous honeycomb structure having cells extending along a common direction, the cells having a plurality of cross-sectional shapes. The honeycomb structure is desirably formed of a material that is stable at temperatures of 3000 or more, such that high temperature processing can be used to help ensure high purity of the final product. The material of the structure may desirably be an oxide or non-oxide ceramic, such as cordierite, silicon nitride, alumina, aluminum titanate, zircon, glass, or glass-ceramic. The plurality of shapes of the cells includes larger shapes in which cells are disposed non-galvanic electrodes, with galvanic electrodes disposed in cells of other shapes.

Abstract: The present invention relates to a solid electrolytic capacitor and a manufacturing method thereof capable of reducing the ESR(Equivalent Series Resistance) and the ESL(Equivalent Series Inductance). In accordance with the present invention, a solid electrolytic capacitor including a plurality of metal powder elements connected in parallel and having anode wires formed in the opposite directions; anode terminals provided on both ends of the metal powder elements respectively and connected to the anode wires; a cathode terminal provided on lower portions of the metal powder elements and connected to the metal powder elements; and an external resin for sealing the metal powder elements connected to the anode terminals and the cathode terminal.

Abstract: An electrical double layer capacitor comprises an element and a case which houses the element. The element has an anode charge collector, anode, separator, cathode and cathode charge collector. The anode and cathode consist of a porous layer containing electrically conducting porous particles as a constituent material. The anode charge collector is disposed in electrical contact with the anode. The cathode charge collector is disposed in electrical contact with the cathode. The thickness of the element is 600 ?m or less. The sum of the anode thickness and cathode thickness is set to 80% or less of the thickness of the element.

Abstract: Apparatuses, methods, and systems associated with and/or having capacitors are disclosed herein. In various embodiments, a capacitor may be formed within a substrate having an interwoven-fiber material. In various ones of these embodiments, a capacitor may have a first electrode including an activation material disposed on a surface of an interwoven-fiber material, a second electrode including an electrolytic solution, and an insulating material disposed between the first electrode and the second electrode.

Abstract: A digital variable capacitor package is provided as having a ground plane disposed on predetermined portion of the top surface of a substrate. An elongated signal electrode may also be disposed on the substrate and including a first end defining an input and a second end extending to a substantially central region of the top surface of the substrate. This elongated signal electrode is disposed to be electrically isolated from the ground plane. A number of elongated cantilevers are disposed on the substrate and each include first ends coupled to the second end of the signal electrode and each further include second ends suspended over different predetermined portions of the ground plane. In operation, one or more of the cantilevers may be actuated to move portion thereof into close proximity to the ground plane for providing one or more discrete capacitance values.

Abstract: An aluminum plate having an aluminum purity of not less than 99.98% by mass and an Fe content of 5 to 50 ppm with the balance consisting of unavoidable impurities is used to realize increased capacitance of an aluminum electrolytic capacitor, reduced height, and improved high frequency characteristics. In this aluminum plate, the total content of Fe in crystal/precipitate is 1 to 50% based on the original content, and the thickness of the aluminum plate 0.2 to 1 mm. In the formation of a capacitor anode, the aluminum plate is subjected to alternate current etching so as to leave a core part having an average thickness of 50 to 150 ?m in the center part in the thickness-wise direction to increase the surface area, followed by anodic oxidation.

Abstract: The present invention is directed to a thick film composition for use in low temperature co-fired ceramic circuits comprising, based on weight percent total thick film composition: (a) 30-98 weight percent finely divided particles selected from noble metals, alloys of noble metals and mixtures thereof; (b) one or more selected inorganic binders and/or mixtures thereof, and dispersed in (c) organic medium, and wherein said glass compositions are immiscible or partially miscible with remnant glasses present in the low temperature co-fired ceramic substrate glasses at the firing conditions. The present invention is further directed to methods of forming multilayer circuits utilizing the above composition and the use of the composition in high frequency applications (including microwave applications).

Abstract: A chip-type filter has a laminated body formed by stacking a plurality of capacitor elements, a pair of positive electrode terminals, a pair of negative electrode terminals, insulating outer resin, and an inductor section. The laminated body includes capacitor elements in a first group and capacitor elements in a second group, the positive electrode sections in both groups are disposed on the opposite sides with respect to the negative electrode sections. Positive electrode terminals are electrically connected to the positive electrode sections of capacitor elements in the first group and those of capacitor elements in the second group, respectively. Negative electrode terminals are electrically connected to the negative electrode sections in the laminated body, and are disposed at both ends of the direction crossing the connecting direction between the positive electrode terminals. The inductor section is insulated from the negative electrode sections and couples the positive electrode terminals.

Abstract: The present invention relates to a resin-molded chip solid electrolyte capacitor comprising a plurality of solid electrolyte capacitor elements horizontally laid in parallel with no gap on a pair of oppositely disposed end parts of a lead frame, and a fixing layer which is extending across the plurality of capacitor elements and fixing the capacitor elements with each other; and having low equivalent series resistance (ESR) and low leakage current (LC value), a production method of the same and an electronic device using the capacitor.

Abstract: A conductive polymer having high conductivity and a solid electrolytic capacitor having low ESR are provided. A conductive polymer is synthesized using as a monomer a compound of a dimer to a decamer in which 3-alkyl five-membered heterocyclic rings are bonded at positions 2 and 5, being sterically controlled. Further, this conductive polymer is used as the solid electrolyte of a solid electrolytic capacitor.

Abstract: In a solid electrolytic capacitor of the present invention, a virtually plate-like anode having a porous sintered body, a dielectric layer, and an electrolyte layer are sequentially formed on an anode lead so as to cover a portion of the anode lead. A cathode includes a first electrically conductive layer containing graphite particles having a grain size of approximately 1 ?m to approximately 10 ?m and APTES; and a second electrically conductive layer including silver particles is formed on the electrolyte layer so as to cover an area surrounding the electrolyte layer. Also, the cathode and a cathode terminal are interconnected through an electrically conductive adhesive layer, and the anode lead and an anode terminal are welded to each other. Further, a mold-packaging resin is formed such that respective edges of the cathode terminal and the anode terminal are located outside the mold-packaging resin.

Abstract: An aspect of the present invention provides a method of manufacturing a solid electrolytic capacitor. The solid electrolytic capacitor includes an anode made of valve action metal, a dielectric layer, a solid electrolytic layer, a cathode conductive layer, and a cathode terminal. The method forms the cathode conductive layer by forming a conductive paste and conductive adhesive between the solid electrolytic layer and the cathode terminal and then simultaneously hardening the conductive paste and the conductive adhesive.

Abstract: A sealed electrode enclosed in separator material is provided for use in a capacitor cell. The separator may either be adhered to the electrode in sheets, or may be formed into a pouch, which is used to enclose the electrode. A method of preparing the electrode sealed with separator is described in which an adhesive is used to secure the pouch to the electrode before sealing it. The prefabricated electrode and separator combination may be used in both coiled capacitor cells and flat capacitor cells that are often used in implantable medical devices. Electrodes prepared in this fashion can be efficiently and reliably aligned within the case of a capacitor cell, and have no exposed electrode surfaces that could lead to short-circuiting within the cell.

Abstract: The present invention provides an asymmetric hybrid capacitor, in which metal oxide containing lithium and capable of producing lithium ions by an electrochemical reaction and supplying the lithium ions in an electrolyte in the capacitor is used as a positive electrode active material, and metal oxide capable of accepting the lithium ions supplied through the electrolyte is used as a negative electrode active material, such that the lithium ions of the same participate in the electrochemical reactions at both electrodes. As a result, it is possible to minimize reduction in ionic conductivity during charge/discharge, compared with conventional asymmetric hybrid capacitors, in which metal oxide and a carbon material are used as electrode materials, respectively. Moreover, since metal oxide having high specific capacitance is used to form both electrodes, it is possible to maximize energy density and power density.

Abstract: The present invention relates to a production method of a solid electrolytic capacitor element wherein a semiconductor layer is formed by electrolytic polymerization on an oxide dielectric film formed on the surface of an electric conductor and an electrode layer is laminated thereon, comprising passing current providing a period for temporarily applying a reverse voltage during the electrolytic polymerization passing current using an electric conductor having a dielectric layer formed thereon as an anode and a negative electrode plate placed in the electrolyte as a cathode; a solid electrolytic capacitor element produced by the method; a solid electrolytic capacitor obtained from the solid electrolytic capacitor element and use thereof. According to the present invention, a solid electrolytic capacitor element in which a high quality semiconductor layer is formed in a short time can be produced, which enables to produce a solid electrolytic capacitor having a good ESR property.

Abstract: An electronic component has a casing. An electrically-conductive body enclosed in the casing. The inner end of a lead is welded to the electrically-conductive body. The outer end of the lead projects outward out of the casing through a through hole formed in the casing. An enlarged portion is formed in the lead at a position between the inner end and the outer end. The enlarged portion is set in the through hole to close the through hole. Even if whiskers are generated at a position between the electrically-conductive body and the lead based on stress generated during a welding process, the whiskers are received on the enlarged portion in the through hole. No whisker falls out of the casing through the through hole.

Abstract: A solid electrolytic capacitor comprising an anode body, a dielectric layer placed on the surface of the anode body, a conductive polymer layer placed on the surface of the dielectric layer, and a housing accommodating at least the anode body, the dielectric layer and the conductive polymer layer, wherein a water-retaining layer having higher water absorption than that of the housing is placed between the conductive polymer layer and the housing.

Abstract: A multilayer electronic component includes a plurality of dielectric layers interleaved with a plurality of internal electrodes. Internal and/or external anchor tabs may also be selectively interleaved with the dielectric layers. Portions of the internal electrodes and anchor tabs are exposed along the periphery of the electronic component in respective groups. Each exposed portion is within a predetermined distance from other exposed portions in a given group such that termination structures may be formed by deposition and controlled bridging of a thin-film plated material among selected of the exposed internal conductive elements. Electrolytic plating may be employed in conjunction with optional cleaning and annealing steps to form directly plated portions of copper, nickel or other conductive material. Once an initial thin-film metal is directly plated to a component periphery, additional portions of different materials may be plated thereon.

Abstract: A solid electrolytic capacitor includes an anode body made of valve metal, a dielectric oxide layer provided on the anode body, and a conductive layer provided on the carbon layer. The carbon layer contains carbon and aromatic compound having sulfonic acid radical. This solid electrolytic capacitor has a small equivalent series resistance.

Abstract: A powder compaction process using opposed rib and channel punches which are interleaved and a production method are used to produce capacitor elements having a uniform compaction density and which are free of surface imperfections.

Abstract: An electrode is used for an electric storage device that includes plural electrodes that are stacked such that an ion-conductive layer is disposed between each pair of the electrodes. Each of the plural electrodes includes a current collector, and an electrode layer, formed on the current collector, which contains an active material. The configuration of the electrode layer (for example, the amount of the active material) varies according to the position in the electrode layer such that a current density in a first region of the electrode, where heat radiation performance is lower than the heat radiation performance in a second region of the electrode, is lower than the current density in the second region of the electrode.

Abstract: A method for producing activated carbon for electrodes of electric double layer capacitors is disclosed which comprises an activation step wherein activated carbon is obtained by mixing an alkali metal hydroxide with a carbon raw material for the activated carbon and heating the mixture in an inert gas atmosphere, a deactivation removal step wherein the alkali metal in the activated carbon is deactivated and removed, and a heat treatment step wherein the activated carbon having gone through the deactivation removal step is heated in an inert gas atmosphere at a temperature higher than 400° C. but not higher than the heating temperature in the activation step.

Abstract: A method for forming a capacitor including forming an anode from a valve metal; forming an oxide on the anode to form an anodized anode; dipping the anodized anode into a slurry of conductive polymer; drying the intrinsically conductive polymer; and providing external terminations in electrical contact with the anode and the conductive polymer.

Abstract: A metal capacitor in which an electric conductivity is significantly improved is provided. The metal capacitor includes: a metal member 11 including a plurality of grooves 11a; a metal oxide film 12 being formed on the metal member 11; a sealing electrode member 13 being formed on the metal oxide film 12 to fill in the plurality of grooves 11a; and an insulating layer 14 being formed on the sealing electrode member 13 and the metal oxide film 12 to insulate the metal member 12 and the sealing electrode member 13.

Abstract: Double-layer energy storage devices and methods for manufacturing thereof are disclosed. Such devices and methods are useful for lessening self-discharge of the double-layer energy storage devices. An energy storage device and methods of manufacture that address the problem of capacitor self-discharge due to electrode misalignment, mismatch and/or unpaired electrodes is provided. The rate of self-discharge of a capacitor is increased when electrodes of electrode pairs are not well matched either by misalignment of the electrodes in one or more electrode pairs (e.g., along a longitudinal side or a terminal end of an electrode), or due to errors in the manufacture of electrodes where the electrodes of an electrode pair are not topographically matched (mismatch). In addition, self-discharge of a capacitor is increased if an unpaired electrode (an electrode without a counter-electrode) exists at the beginning, end or both of a roll or stack of capacitor units.

Abstract: A hybrid capacitor is provided which includes a substrate, at least one plate capacitor and at least one through hole capacitor. The substrate has through holes and the plate capacitors are on the substrate. At least one through hole capacitor and at least one plate capacitor are in parallel. The through hole capacitor at least includes an anode layer, a first dielectric layer, a first cathode layer and a second cathode layer. The anode layer is disposed on an inner surface of at least one through hole, and a surface of the anode layer is a porous structure. The first dielectric layer is disposed on the porous structure of the anode layer and covered with the first cathode layer. The first cathode layer is covered with the second cathode layer. A conductivity of the second cathode layer is larger than a conductivity of the first cathode layer.

Abstract: Implantable defibrillators are implanted into the chests of patients prone to suffering ventricular fibrillation, a potentially fatal heart condition. A critical component in these devices is an aluminum electrolytic capacitor, which stores and delivers life-saving bursts of electric charge to a fibrillating heart. To reduce capacitor size, manufacturers have developed special aluminum foils, such as core-etched and tunnel-etched aluminum foils. Unfortunately, core-etched foils don't work well in multiple-anode capacitors, and tunnel-etched foils are brittle and tend to break when making some common types of capacitors. Accordingly, the inventors devised a new foil structure having perforations and cavities. In an exemplary embodiment, each perforation and cavity has a cross-sectional area, with the perforations having a larger, for example, 2 to 100 times larger, average cross-sectional area than the cavities.

Abstract: A capacitor device comprises a capacitor element and an interposer. The capacitor element has a connection surface and comprises an anode electrode and a cathode electrode. The anode electrode and the cathode electrode are formed, at least in part, on the connection surface. The interposer comprises an insulator substrate, a plurality of first anode terminals, a plurality of first cathode terminals, a second anode terminal, a second cathode terminal, an anode through-hole and a cathode through-hole. The insulator substrate has first and second surfaces and has no inner conductive layer. The first anode terminals and the first cathode terminals are formed on the first surface. The first anode terminals are more in number than the anode electrode of the capacitor element. The first cathode terminals are more in number than the cathode electrode of the capacitor element The second anode terminal and the second cathode terminal are formed on the second surface.