Nippon Chemi-con Corporation

Sony Corporation

Kazuya Koseki

Kazuhiro Nagahara

Kenji Machida

Masao Sakakura

Kazuma Okura

Kouichi Kuroda

Mitsunori Sakama

Yoshihisa Takayama

Atsushi Yoshida

Yuki Tanaka

Yasuaki Kano

Kenta Sato

Takao Hiramoto

Kazuyuki Hirooka

Junichi Kawakami

Tomohiro Matsuzaki

Makoto Tominaga

Takayuki Nakaji

Masahiro Kiyota

Tatsuru Hatae

An electrolytic capacitor that can suppress a decrease over time of capacity, a cathode body included in the electrolytic capacitor, and a production method of the electrolytic capacitor are provided. The electrolytic capacitor includes an anode foil, a cathode body, and electrolytic solution. The anode foil is formed of valve metal and has dielectric oxide film formed on a surface of the foil. The cathode body includes cathode foil formed of valve metal and a carbon layer laminated on the cathode foil. An interfacial resistance between the cathode foil and the carbon layer is 1.8 mΩ·cmor less.

Electrolytic capacitor, negative electrode body and method for producing electrolytic capacitor

A capacitor includes a positive electrode foil, a negative electrode foil, and a separator disposed between the positive and negative electrode foils. The negative electrode foil includes a carbon layer, and the separator is in contact with the carbon layer. The separator has a density [symbol: ρ, unit: g/cm] satisfying the formula: where WPA is the amount of carbon per square centimeter of the separator [unit: μg/cm].

Capacitor with negative electrode foil including carbon layer

Provided is an electrode body that exhibits a good cathode side capacitance, and an electrolytic capacitor provided with this electrode body. The electrode body used for a cathode of the electrolytic capacitor has a cathode foil and a carbon layer. The cathode foil is made of a valve acting metal, and an enlarged surface layer is formed on the surface thereof. The carbon layer is formed on the enlarged surface layer. The interface between the enlarged surface layer and the carbon layer has an uneven shape.

Electrode body, electrolytic capacitor provided with electrode body, and method for producing electrode body

A cathode and an electrolytic capacitor including the cathode which can suppress production of hydrogen gas are provided. The cathode of the electrolytic capacitor comprising cathode foil formed of valve action metal, and a conductive layer formed on a surface of the cathode foil. When current in a range of current density of leakage current of the electrolytic capacitor flows by electrochemical polarization, potential corresponding to said current is at a higher side than a natural immersion potential of reference cathode foil formed of the valve action metal with purity of 99.9%.

Cathode and electrolytic capacitor

Provided is a solid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance. The solid electrolytic capacitor is provided with: a cathodehaving a cathode substratemade of a valve metal and having an etching pit; an oxide layermade of an oxide of the valve metal provided on a surface of the cathode substrate, and a carbon coating layerprovided on a surface of the oxide layer, the carbon coating layerincluding carbon particles and having an entry areathat enters the etching pitand a penetration areathat penetrates through the oxide layerand conducts with the cathode substrate; an anode having an anode substrate made of a valve metal, and a dielectric layer provided on a surface of the anode substrate and made of an oxide of the valve metal that composes the anode substrate; and a solid electrolyte layer including a conductive polymer provided between the carbon coating layer of the cathode and the dielectric layer of the anode.

Solid electrolytic capacitor and method for manufacturing same

An electrode body which achieves not only high initial capacitance of an electrolyte capacitor but also achieves stable capacitance even after being exposed to high temperature environment, and the electrolyte capacitor including the electrode body are provided. The electrode body is used for a negative electrode of the electrolyte capacitor, and the electrode body includes a negative electrode foil formed by a valve action metal, and a carbon layer formed on the negative electrode foil. The carbon layer includes a first spherical carbon and a second spherical carbon, and the first spherical carbon has a BET specific surface area larger than the second spherical carbon.

Provided is a hybrid electrolytic capacitor having large capacitance, low ESR, and superior high-frequency characteristics and high-temperature endurance. The hybrid electrolytic capacitoris provided with: a cathodehaving a cathode substratemade of a valve metal, an oxide layerprovided on a surface of the cathode substrate, an inorganic conductive layerprovided on a surface of the oxide layerand including an inorganic conductive material, and an organic conductive layerprovided on a surface of the inorganic conductive layerand including a conductive polymer; an anodehaving an anode substratemade of a valve metal and a dielectric layerprovided on a surface of the anode substrate; and a composite electrolyte layerhaving a solid electrolyte layercontaining conductive polymer particleswhich is provided between and in contact with the organic conductive layerof the cathodeand the dielectric layerof the anode, and an electrolytic solutionfilled between the conductive polymer particlesin the solid electrolyte layer

Hybrid electrolytic capacitor and method for manufacturing same

Provided is an electrolytic capacitor that can reliably exhibit redox capacity due to a conductive polymer layer of a cathode. The electrolytic capacitor includes: a cathode having a conductive substrate and a conductive polymer layer placed on the surface of the conductive substrate; an anode having a substrate composed of a valve metal and a dielectric layer composed of an oxide of the valve metal that is placed on the surface of the substrate, the anode being disposed such that the dielectric layer and the conductive polymer layer of the cathode are opposed to each other across a space; and an ion conductive electrolyte with which the space is filled, the conductive polymer layer of the cathode that is in contact with the ion conductive electrolyte exhibiting a redox capacity due to application of a voltage between the anode and the cathode, wherein the contact resistance between the conductive substrate and the conductive polymer layer in the cathode is 1 &#x3a9;cmor less.

Electrolytic capacitor and method for manufacturing same

Provided is an electrolytic capacitor having a cathode that exhibits a high capacity. The electrolytic capacitor includes: a cathode having a conductive substrate and a conductive polymer layer placed on a surface of the conductive substrate; an anode having a substrate composed of a valve metal and a dielectric layer composed of an oxide of the valve metal that is placed on the surface of the substrate and is so placed that the dielectric layer and the conductive polymer layer of the cathode face each other through a space; and an ion-conductive electrolyte filled in the space, in which the conductive polymer layer of the cathode that is in contact with the ion-conductive electrolyte expresses a redox capacity by applying a voltage between the anode and the cathode.

Electrolytic capacitor and manufacturing method therefor

A solid electrolytic capacitor which exhibits excellent characteristics for high voltage applications of 80 WV or more and a method for manufacturing this solid electrolytic capacitor are provided. This solid electrolytic capacitor includes a capacitor elementwhich is obtained by winding an anode foiland a cathode foil, with a separatorinterposed therebetween, the capacitor elementincludes a solid electrolyte layer, and a void part in the capacitor elementis filled with an electrolyte solution, the electrolyte solution contains an ammonium salt of an aliphatic carboxylic acid as a solute and a polyhydric alcohol as a solvent, and the addition amount of the acid serving as the solute relative to the solvent is 0.6 mol/kg or less.

Solid electrolytic capacitor and method for manufacturing solid electrolytic capacitor

The present invention provides solid electrolytic capacitor with excellent properties in high-voltage application of 80V or more and a manufacturing method thereof. The solid electrolytic capacitor is manufactured by: forming, in a capacitor element with an anode electrode foil and a cathode electrode foil wound with an interposed separator, a solid electrolyte layer by using a conductive polymer dispersion in which particles of a conductive polymer dispersed in a solvent; and filling voids inside the capacitor element in which the solid electrolyte layer has been formed with an electrolytic solution containing less than 9 wt % of a salt of a composite compound of inorganic acid and organic acid as a solute for filling.

Electrolytic capacitor having a solid electrolyte layer and manufacturing method thereof

Provided are an electrolytic capacitor with high withstand voltage capable of preventing deterioration of withstand voltage characteristics caused by lead-free reflow or the like and improving ESR characteristics, and a manufacturing method thereof. The electrolytic capacitor is obtained by impregnating a capacitor element in which an anode electrode foil and a cathode electrode foil are wound with a separator interposed, with a dispersion containing: particles of a conductive polymer; sorbitol or sorbitol and polyalcohol; and a solvent so as to form a solid electrolyte layer containing 60 to 92 wt % of the sorbitol or the sorbitol and polyalcohol, and by filling an electrolytic solution containing ethylene glycol in a gap portion in the capacitor element on which the solid electrolyte layer is formed.

Electrolytic capacitor and method of manufacturing the same

A high voltage proof solid electrolytic capacitor that can prevent deterioration of voltage proof property due to lead-free reflow etc. and a manufacturing method thereof are provided. A capacitor element having an anode and cathode electrode foils wound via a separator is impregnated with a dispersion comprising conductive polymer particles or powder and a solvent to form a solid electrolyte layer consisting of a conductive polymer, and the voids inside the capacitor element having the solid electrolyte layer formed are filled with an ion-conducting substance comprising a mixed solvent comprising ethylene glycol and &#x3b3;-butyrolactone together with a solute selected from at least one type of an ammonium salt, a quaternary ammonium salt, a quaternized amidinium salt, and an amine salt of an organic acid, an inorganic acid, and a composite compound between organic acid and inorganic acids to obtain a solid electrolytic capacitor.

Solid electrolytic capacitor and manufacturing method thereof

A tape cartridge housing a magnetic tape includes an auxiliary storage medium having a storage unit in which to store the recording medium information such as design parameters or the number of times of recording and/or reproduction of the magnetic tape, and a transmission/reception unit for effecting inputting/outputting of the recording medium information with the recording and/or reproducing apparatus. The auxiliary storage medium is mounted so that the transmission/reception unit is exposed to the outside through an opening provided in a lateral surface of the main cartridge body unit not obstructing the loading of the magnetic tape, that is in a surface of the main cartridge body unit other than its front surface as an inserting end of the tape cartridge into the inside of the recording and/or reproducing apparatus. The auxiliary storage medium has an antenna constituting the transmission/reception unit for inputting/outputting the recording medium information with the recording and/or reproducing apparatus. It is through this antenna that the power is supplied from the auxiliary recording and/or reproducing unit provided on the recording and/or reproducing apparatus in accordance with a non-contact system transmitting the recording medium information and the power overlaid on the recording medium information.

Growing community of inventors

Tokyo, Japan

Kazuya Koseki