460results about "Capacitor dielectric layers" patented technology

A solid electrolytic capacitor according to one aspect of the present disclosure includes: an anode body made of a valve metal; a dielectric layer formed on the anode body; and a solid electrolyte layer formed on the dielectric layer. The solid electrolyte layer includes: a first conductive polymer layer formed on the dielectric layer and heterogeneously doped with a monomolecular dopant; a block layer formed on the first conductive polymer layer; and a second conductive polymer layer formed on the block layer and composed of a self-doped-type conductive polymer containing a plurality of side chains containing a functional group that can be doped. The block layer blocks a migration of the self-doped-type conductive polymer from the second conductive polymer layer into the first conductive polymer layer and / or a migration of the self-doped-type conductive polymer from the second conductive polymer layer into pores of the porous anode body.

A capacitor includes a first electrode, a second electrode, and a dielectric. The dielectric is disposed between the first electrode and the second electrode. The dielectric includes a compound having an inverted perovskite structure. The inverted perovskite structure of this compound has a portion in which a cation is present at each vertex of corner-sharing octahedra and an anion is present at a center of each of the corner-sharing octahedra.

To provide a thin film capacitor having high adhesion with respect to a circuit substrate. A thin film capacitor includes: a metal foil having a roughened upper surface; a dielectric film covering the upper surface of the metal foil and having an opening through which the metal foil is partly exposed; a first electrode layer contacting the metal foil through the opening; and a second electrode layer contacting the dielectric film without contacting the metal foil. An angle θa formed by the other main surface of the metal foil and a side surface thereof is more than 20° and less than 80°. The side surface is thus tapered at an angle of more than 20° and less than 80°, so that it is possible to suppress warpage and to enhance adhesion with respect to a multilayer substrate when the thin film capacitor is embedded in the multilayer substrate.

To provide a thin film capacitor in which warpage is less likely to occur. A thin film capacitor includes: a metal foil having roughened upper and lower surfaces; a dielectric film covering the upper surface of the metal foil and having an opening through which the metal foil is partly exposed; a dielectric film covering the lower surface of the metal foil and made of a dielectric material having a thermal expansion coefficient smaller than that of the metal foil; a first electrode layer contacting the metal foil through the opening; and a second electrode layer contacting the first dielectric film without contacting the metal foil. The lower surface of the metal foil is thus covered with the dielectric film having a small thermal expansion coefficient, thereby making it possible to prevent the occurrence of warpage.

A solid electrolytic capacitor that includes: an anode plate including a core portion, a porous layer having pores on at least one main surface of the core portion, and a dielectric layer on a surface of the porous layer and extending into the pores of the porous layer; and a cathode layer that includes a solid electrolyte layer on a surface of the dielectric layer. The solid electrolyte layer includes a conductive polymer layer inside the pores of the porous layer, the conductive polymer layer comprising a mixture of a conductive polymer and an insulating material. The insulating material is a material which contains an OH group, a COOH group, a CO group, or an NH2 group in a molecule, has hygroscopicity, and does not have a function as a dopant for the above-described conductive polymer.

A capacitor array that includes: a capacitor part including a plurality of capacitor elements disposed in a planar arrangement in an in-plane direction orthogonal to a thickness direction, the plurality of capacitor elements including mutually adjacent capacitor elements that are separated from each other, wherein the plurality of capacitor elements each include a first electrode layer and a second electrode layer that face each other in the thickness direction with a dielectric layer interposed between the first electrode layer and the second electrode layer; a built-in member disposed at an outer periphery of the capacitor part in the in-plane direction; and a sealing layer that seals the capacitor part and the built-in member, wherein the built-in member has a higher melting temperature than the sealing layer.

The invention discloses a method for manufacturing anode foil of ultra-high voltage aluminum electrolytic capacitor with high dielectric constant, and belongs to the technical field of anode foil of aluminum electrolytic capacitor. The method comprises: (1) preparation of ultra-high voltage etching foil, including pretreatment of aluminum plain foil, pore formation, secondary pore expansion and tertiary pore expansion of etching foil, etc.; (2) preparation of Ag / TiO2 precursor solution, preparing titanium dioxide gel doped with different Ag contents by sol-gel method; (3) immersion coating treatment, preparing a uniform gel layer on the etching foil by immersion-pulling method; (4) preparation of ultra-high voltage anode foil, anodizing the etching foil after coating the gel layer at high voltage, and then annealing at high temperature. The ultra-high voltage anode foil prepared according to the present invention has a higher specific capacitance, and can also maintain a smaller loss factor tanδ.

The invention discloses a high-voltage solid capacitor positive electrode oxide film repairing electrolyte and a film coating process thereof, and belongs to the technical field of solid capacitors. The electrolyte comprises ammonium azelate, azelaic acid, ammonium dihydrogen phosphate, phosphoric acid, a reducing agent, a functional additive, ethylene glycol, deionized water and other components; the electrolyte can effectively repair the positive electrode foil oxidation film when the positive electrode foil oxidation film has defects, and the film coating process comprises the steps of acid pickling pretreatment, electrolyte repair, silane coupling agent treatment, film forming liquid impregnation and curing and the like, according to the invention, the oxidation film on the surface of the positive electrode foil is repaired through the electrolyte, and the uniform and compact protection film is formed through a film coating process, so that the mechanical strength and corrosion resistance of the oxidation film are enhanced, the leakage current value of the capacitor is effectively reduced, and the service life of the capacitor is prolonged. The performance of the capacitor is improved, and the corrosion of the external environment to the oxidation film is isolated.

A solid electrolytic capacitor includes: a capacitor element including an anode part and a cathode part; a substrate that supports the capacitor element; a sealing body that seals the capacitor element; a first external electrode electrically connected to the anode part; a second external electrode electrically connected to the cathode part; and an adhesive layer disposed between the capacitor element and a first surface of the substrate. At an interface between the first surface and the adhesive layer, a maximum height Rz1 of surface roughness of the first surface is 5 μm or more, and a maximum height Rz2 of surface roughness of the adhesive layer is 3 μm or more.

The invention provides a lightweight flexible composite micro-energy storage module, which comprises a flexible substrate, a composite electrode layer, a solid electrolyte layer and a packaging layer, and is characterized in that the flexible substrate is made of a polyurethane-graphene composite material, the thickness of the flexible substrate is 50-200 [mu] m, and the surface of the flexible substrate is provided with a micro-crack structure; the composite electrode layer is formed by alternately stacking MXene / silicon carbon composite nanosheets and polypyrrole conductive polymers, wherein the mass ratio of MXene to silicon carbon is 3: 1 to 5: 1. According to the invention, through the mechanical interlocking design of the microcrack structure of the flexible substrate and the composite electrode layer, the interlayer binding force is significantly enhanced, and the structural integrity under dynamic bending is improved; the root-shaped ion transmission channel of the solid electrolyte layer and the vertical orientation transition layer realize electron-ion dual-channel cooperative transmission and reduce the interface impedance; the gradient hydrophobic structure of the packaging layer is matched with mechanics through chemical bonding, the sealing performance, the flexibility and the environmental tolerance are balanced, and the service life of the module is prolonged.

An electrode foil for an electrolytic capacitor includes: an anode body that includes a core part and a porous part disposed on a surface of the core part, and contains a first metal; a first dielectric layer that covers at least a part of the porous part; and a second dielectric layer that covers at least a part of the first dielectric layer. The second dielectric layer contains an oxide of a second metal. The first dielectric layer includes a first part having a thickness T1 and a second part having a thickness T2 smaller than the thickness T1.

Fabricating a capacitor includes forming conduits in a porous layer of material. The porous layer of material has particles that each includes a dielectric on a core. The formation of the conduits causes a portion of the dielectric to convert from a first phase to a second phase. The method also includes removing at least a portion of the second phase of the dielectric from the porous layer of material.

The invention discloses an anodic oxidation method for improving the uniformity of a dielectric layer of a capacitor. The anodic oxidation method comprises the following steps that a tantalum block is pretreated and then placed in an electrolytic bath; adding electrolyte into the electrolytic bath, and performing oscillation circulation through an oscillator; a tantalum block is sequentially subjected to a pre-oxidation procedure, a main oxidation procedure, a stabilization procedure, heat treatment and constant-pressure treatment, the tantalum block is taken out after treatment is finished, and the tantalum block is cleaned and dried to finish anodic oxidation. The ultrasonic oscillator is additionally arranged in the electrolytic bath, so that the electrolyte concentration gradient can be eliminated, and the thickness uniformity of the dielectric layer is improved. And by adding ammonium dihydrogen phosphate, micropores are filled, the surface of the tantalum block is passivated, and the performance of a capacitor prepared from the tantalum block is improved. Through a staged dynamic oxidation method and a composite electrolyte formula, the uniformity and reliability of a tantalum oxide dielectric layer are remarkably improved, and the method is suitable for industrial production of a high-reliability tantalum capacitor.

An electrolytic capacitor includes a capacitor element including an anode part and a cathode part, an exterior body sealing the capacitor element, a first external electrode electrically connected to the anode part and exposed from the exterior body, a second external electrode electrically connected to the cathode part and exposed from the exterior body, and a first base electrode connecting the anode part and the first external electrode. The first base electrode contains a first sintered metal, and the first sintered metal is in contact with an end surface of the anode part not covered with the exterior body and is in contact with the first external electrode. A relation 0.5≤W1 / Tpc≤100 is satisfied, where Wp represents a width of the end surface of the anode part, and Tpc represents a thickness of the first sintered metal at a center of the width Wp.

To provide a chemical conversion solution, a method for manufacturing an electrolytic capacitor, and an electrolytic capacitor that can improve the characteristics of the electrolytic capacitor.SOLUTION: A chemical conversion solution is used to repair an aluminum oxide film formed on at least one of an anode foil and a cathode foil included in an electrolytic capacitor element, and contains at least one of phosphoric acid, phosphorous acid, and hypophosphorous acid, and a chelating agent that forms an aluminum complex that bonds with the aluminum oxide film.SELECTED DRAWING: Figure 5

The invention discloses a chip solid electrolyte tantalum capacitor capable of ensuring moisture resistance and a preparation method thereof, and belongs to the field of capacitor preparation. The tantalum capacitor comprises a tantalum anode, a dielectric layer, a solid electrolyte layer, a graphite silver paste layer, a hydrophobic moisture-proof layer, an epoxy resin shell, a lead frame, a positive lead and a negative lead. Wherein the tantalum anode is sequentially coated with the dielectric layer, the solid electrolyte layer and the graphite silver paste layer from inside to outside; the graphite silver paste layer is adhered to the lead frame through a conductive adhesive to lead out an anode lead and a cathode lead; the graphite silver paste layer is coated with a hydrophobic moisture-proof layer; and the hydrophobic moisture-proof layer is coated and packaged with an epoxy resin shell. According to the tantalum capacitor, the graphite silver paste layer is coated with the specific hydrophobic moisture-proof layer, so that the moisture-proof performance of the chip-type solid electrolyte tantalum capacitor is effectively improved on the premise that the preparation process difficulty, cost and finished product volume are not increased, and the chip-type solid electrolyte tantalum capacitor is suitable for being used in a high-temperature and high-humidity environment; and the product performance is ensured.

An electrolytic capacitor includes a capacitor element and a liquid component that contains a non-aqueous solvent. The capacitor element includes an anode foil having a dielectric layer on a surface thereof, a cathode foil, and a separator and a conductive polymer component that are interposed between the anode foil and the cathode foil. The separator contains synthetic resin fibers. The water concentration in the liquid component is 1000 ppm or more and 10000 ppm or less by mass.

The invention discloses a chip conducting polymer tantalum capacitor with stable leakage current and a preparation method thereof, and belongs to the field of capacitors. The method comprises the following steps: coating the surface of the dielectric layer with the pretreatment layer to enhance the adhesive force between the dielectric layer and the water-retaining conductive polymer cathode layer; the pretreatment layer is sequentially coated with a water-retaining inner layer containing a water-retaining additive, a transition layer and an outer layer to form a water-retaining conductive polymer cathode layer, and the adhesive force between sub-layers of the outer layer is improved through a cross-linking agent; the end face of the tantalum anode core leading out the tantalum wire is coated with an insulating protection layer; a graphite layer and a silver paste layer are coated, and two electrodes are led out through a lead frame; and adding a barrier layer on the surface of the tantalum capacitor core group and molding and packaging a shell to prepare the tantalum capacitor. Water vapor in the polymer tantalum capacitor prepared by the method is stabilized at a certain level and is slightly influenced along with temperature change, and the direct current leakage current level of the capacitor is improved.

A solid-electrolytic capacitor according to an aspect of the present disclosure includes an anode member made of a valve metal, a dielectric layer formed on the anode member, and a solid electrolyte layer formed on the dielectric layer. The solid electrolyte layer includes a first electrolyte layer formed on the dielectric layer and a second electrolyte layer formed on the first electrolyte layer, in which the first electrolyte layer is an ion-conducting electrolyte layer and the second electrolyte layer is an electron-conducting electrolyte layer.

The invention discloses a preparation method of an aluminum electrolytic capacitor, and relates to the technical field of capacitors. The method at least comprises the following steps: winding an anode foil, double-layer electrolytic paper and a cathode foil into a core package; carrying out impregnation treatment on the core package; and drying the impregnated core package and putting the core package into a shell to form the aluminum electrolytic capacitor. Wherein the double-layer electrolytic paper comprises a microporous layer and a base material layer, the microporous layer is arranged close to the anode foil, conductive graphite is adsorbed on the microporous layer, the raw material of the microporous layer is bamboo pulp fiber, and the raw material of the base material layer is bamboo pulp fiber and wood pulp fiber. The electrolytic paper of the aluminum electrolytic capacitor prepared by the invention comprises the microporous layer and the base material layer, and the conductive graphite is attached to the microporous layer, so that the high-voltage alternating current impact resistance and the cycle performance of the aluminum electrolytic capacitor are effectively improved.

The solid electrolytic capacitor includes at least one capacitor element. The capacitor element includes: an anode foil including a porous portion in at least a surface layer; a dielectric layer covering at least a portion of the anode foil; and a solid electrolyte layer covering at least a portion of the dielectric layer. The solid electrolyte layer contains a first polymer component containing a conjugated polymer and a second polymer component containing a polymer anion. A peak unique to the first polymer component is observed in a Raman spectrum of a surface layer of the solid electrolyte layer. When the rated voltage of the solid electrolytic capacitor is Rv (V), the average thickness (T) of the dielectric layer is 2.5 * Rv (nm) or more.

This capacitor 1a comprises a metal tantalum 10, a conductor 20, and a tantalum oxide film 30. The tantalum oxide film 30 is disposed in contact with the metal tantalum 10, and is disposed between the metal tantalum 10 and the conductor 20. The tantalum oxide film 30 includes a first part 31 and a second part 32 containing fluorine. The second part 32 exists at a position closer to the metal tantalum 10 than the first part 31 in the thickness direction of the tantalum oxide film 30. Additionally, the concentration of fluorine in the second part 32 is lower than the concentration of fluorine in the first part 31.

To suppress the decrease in capacitance of an electrolytic capacitor and the increase in a leakage current.SOLUTION: An electrode foil for an electrolytic capacitor includes an anode body containing a valve metal, an intermediate layer covering at least a portion of the anode body, and a first dielectric layer covering at least a portion of the intermediate layer. The intermediate layer contains elemental zinc.SELECTED DRAWING: Figure 1

This capacitor is provided with: a porous body that comprises a plurality of pores; and a conductor. The porous body comprises: a conductive base material; a first dielectric layer that is disposed on the base material; and a second dielectric layer that is disposed on the base material. The conductor is disposed on the first dielectric layer and the second dielectric layer. The first dielectric layer is disposed, in the porous body, in a first region that includes a boundary between the porous body and the outside of the porous body. The second dielectric layer is disposed in a second region that is located more inward of the porous body than the first region in the porous body.

An electrolytic capacitor includes exterior body and an element stack body including a plurality of capacitor elements. Each of the plurality of capacitor elements includes an anode body, a dielectric layer, and a cathode part covering at least a part of the dielectric layer. The exterior body includes a first principal surface, a second principal surface intersecting the first principal surface, a third principal surface opposite to the first principal surface, and a fourth principal surface opposite to the second principal surface. In at least one first capacitor element among the plurality of capacitor elements, an end surface of an end of the anode body is exposed from the exterior body at least on first principal surface to be electrically connected to a first external electrode. And an end surface of an end of the cathode part is exposed from the exterior body at least on second principal surface to be electrically connected to a second external electrode.

The invention provides a tantalum capacitor dielectric layer gradient oxidation preparation method and an oxidation film and an anode block thereof, and the method employs a multi-stage gradient boost rate to carry out electrochemical oxidation on a tantalum anode, and controls the boost rate and the oxidation voltage at different stages. And the oxide film forms a grain size gradient structure from the compact layer at the bottom to the nanocrystalline layer at the top, and the film thickness is 400-900 nm. Meanwhile, an electrolyte formula is optimized, ammonium dihydrogen phosphate and cerous nitrate are added into a phosphoric acid solution, the compactness of the film is improved, and oxygen vacancies are inhibited; ozone bubbling treatment is introduced in the constant-pressure stage, and the defect concentration is further reduced. The prepared dielectric layer has high breakdown voltage, low leakage current and high specific capacitance performance, the reliability of the tantalum capacitor is remarkably improved, the service life of the tantalum capacitor is remarkably prolonged, and the dielectric layer is suitable for high-reliability electronic equipment.

A capacitor 1a includes a metallic tantalum 10, an electric conductor 20, and an oxidized tantalum film 30. The oxidized tantalum film 30 is disposed between the metallic tantalum 10 and the electric conductor 20, where the oxidized tantalum film 30 is in contact with the metallic tantalum 10. The oxidized tantalum film 30 includes a first portion 31 containing fluorine, and a second portion 32. The second portion 32 is located closer to the metallic tantalum 10 than the first portion 31 in a thickness direction of the oxidized tantalum film 30. And a fluorine concentration at the second portion 32 is lower than a fluorine concentration at the first portion 31.

The present invention relates to a polymer capacitor comprising an anode, a dielectric layer and a cathode wherein the cathode comprises a solution processed n-type conductive polymer having an electrical conductivity of at least 100 S / cm, preferably at least 500 S / cm.

To provide a solid electrolytic capacitor having high reliability and high productivity by maintaining high airtightness while maintaining excellent electrical characteristics and a manufacturing method of the same.SOLUTION: A solid electrolytic capacitor comprises: a capacitor element 1 which has an anode body 2, a dielectric oxide covering layer 3 covering the anode body 2, and a cathode body 6 formed on the dielectric oxide covering layer 3 so as to be insulated from the anode body 2; an exterior body 10 which covers the capacitor element 1; a contact layer 11 which is formed in an anode terminal part 9 being an end of the anode body 2 and has a surface 11S with prescribed surface roughness; and an anode side electrode layer (12) which covers the surface 11S.SELECTED DRAWING: Figure 2

To provide techniques for reducing an anomalous charge current (ACC) in an electrolytic capacitor.SOLUTION: When a conductive polymer 18 is applied to an electrolytic capacitor, processing of forming mordant layers (20, 21) of a phytic acid or the like is performed. Examples of sites where the mordant layers are formed are preferably between primary and secondary conductive polymers (18 / 22), between a dielectric 16 and the primary conductive polymer, on each layer of the primary conductive polymer, and the like.SELECTED DRAWING: Figure 1