Nec Corporation

Nec Tokin Corporation

Nec Toppan Circuit Solutions, Inc.

Takayuki Inoi

Satoshi Arai

Yoshihiko Saiki

Sadamu Toita

Susumu Saito

Hiromi Suzuki

Kazumasa Ohya

Naoto Taihaku

Yuko Sato

Tsuyoshi Kitami

Susumu Saitou

Hiroshi Sasaki

Hirofumi Nakamura

Katsuhiro Yoshida

Mitsuhiro Sugimoto

Satoru Tagami

Yutaka Akimoto

Koichi Zama

Kiyotaka Hamada

Takesi Inoue

Kiyotak Hamada

A sheet-shaped capacitor for storing electrical charges of large capacities, and to assure facilitated manufacture, cost reduction and improved reliability, and a method for manufacturing the capacitor. The capacitor includes a dielectric film, formed on a first major surface of a metal plate, an electrically conductive high polymer layer, formed on a first major surface of the dielectric film, and an electrically conductive layerformed on a first major surface of the electrically conductive high polymer layer, such as by copper plating. A cathode electrodeis led out from the electrically conductive layeron the side electrically conductive high polymer layer

Sheet-shaped capacitor and method for manufacture thereof

A battery pack is provided which can be suitably used in a case where charging of a dedicated secondary battery in a portable terminal device is difficult. The battery pack is mounted in a battery mounting section in a portable cellular phone (portable terminal device) proper. In the battery pack, alkaline accumulators are connected in series. Alkaline accumulators generate electromotive forces having a voltage (3V) being lower than that of the dedicated secondary battery. A power source circuit has a boosting-type DC/DC converter which boosts a voltage of the alkaline accumulators being connected in series at a level being same as that of the dedicated secondary battery (for example, 4.5V), and outputs the boosted voltage. An electrical double layer capacitor has a capacity to feed stable power to an internal circuit in which power consumption increases or decreases in a burst manner and is charged by application of an output of the power source circuit and stores the power.

Battery pack

In an electronic circuit having an integrated circuit () having a power supply terminal, a noise filter disposed adjacent to the integrated circuit, and a printed board () having a pattern for supplying a power supply to the power supply terminals of the integrated circuit through the noise filter, the noise filter consists of a transmission line type noise filter () for removing noises having a wide frequency band.

Electronic circuit with transmission line type noise filter

An external cathode terminal () is adhered to one surface of a capacitor element while a prepreg () is adhered to another surface of the capacitor element. A reinforcement plate () is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material (A,B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.

Thin surface mounted type solid electrolytic capacitor

A transmission line type noise filter, which is connectable between a direct current power supply and an electrical load component to pass a coming DC current while attenuating a coming AC current, includes a first conductor, a dielectric layer, a second conductor as a cathode, a first anode (), and a second anode. The first and the second conductors and the dielectric layer serve as a capacitance forming portion. The thickness of the first conductor is selected to substantially restrict temperature elevation of the first conductor, which is caused by DC direct current flowing in the first conductor.

Transmission line type noise filter with reduced heat generation even when large DC current flows therein

In a laminated solid electrolytic capacitor including a plurality of solid electrolytic capacitor elements, first end regions of anode bodies of the solid electrolytic capacitor elements adjacent to each other are mechanically connected to each other through a spacer. First end surfaces of the anode bodies of the solid electrolytic capacitor elements adjacent to each other are electrically connected to each other through an electrically conductive member.

Laminated solid electrolytic capacitor and laminated transmission line device increased in element laminating number without deterioration of elements

In a stacked solid electrolytic capacitor or a stacked transmission line element, anode portions of adjacent elements are electrically and mechanically connected to each other by the use of connecting members each in the form of a conductive adhesive or solderable metal, via metal plates connected to the anode portions so as to sandwich therebetween the anode portions, respectively, from the upper and lower surfaces thereof. On the other hand, cathode portions of the adjacent elements are electrically and mechanically connected to each other by a conductive adhesive, or are electrically and mechanically connected to each other by the use of adhesive insulating sheets each having a hollowed portion and a conductive adhesive filled in the hollowed portions, or are adhered to each other by adhesive insulating sheets, then electrically connected to each other by a conductive adhesive applied onto side surfaces of the cathode portions.

Stacked solid electrolytic capacitor and stacked transmission line element

A noise filter () has a first impedance element () having an impedance value Z, a second impedance element () having an impedance value Z, a third impedance element () having an impedance value Z, a first anode terminal (), a second anode terminal (), and a cathode terminal (). Z&#x3c;Zand Z&#x3c;Zare satisfied. Both ends of a central conductor () of the first impedance element () are connected to a first node () and a second node (), respectively. Both ends of the second impedance element () are connected to the first node () and the first anode terminal (), respectively. Both ends of the third impedance element () are connected to the second anode terminal () and the second node (), respectively. The central conductor () and a cathode conductor () of the first impedance element () form a transmission line structure having the impedance value Z. The cathode conductor () is connected to the cathode terminal ().

Transmission line type noise filter with small size and simple structure, having excellent noise removing characteristic over wide band including high frequency band

The invention provides a solid electrolytic capacitor of a configuration having a metal plated layer in a cathode part in order to prevent a decrease in the conductivity by oxidation of a conductive polymer and to realize a high reliability. Also there is provided a configuration in which a cathode part of the solid electrolytic capacitor includes a first metal plated layer and a solderable second metal layer.

Solid electrolytic capacitor

A transmission line type noise filter includes a metal fine wire ( ) made of valve-operational metal and serving as a central conductor, a capacitance forming portion ( ) formed over a predetermined length on the periphery of the metal fine wire, and a conductor layer ( ) formed on the surface of the capacitance forming portion and serving as an external conductor. The capacitance forming portion ( ) includes a sintered body ( ) formed on the metal fine wire and made of the foregoing valve-operational metal, a dielectric film ( ) formed on the surface of the sintered body and serving as a dielectric, and a solid electrolyte layer ( ) formed on the surface of the dielectric film.

In an electronic device supplying a DC power to an LSI chip ( ), a noise filter ( ) of a distributed constant type, having an input port ( ) and an output port ( ), is mounted on a circuit board ( ). The noise filter ( ) reduces high-frequency noise incoming thereto and allows DC current to flow therethrough. The input port ( ) is connected to a DC power line ( ) and a ground conductor ( ) on the circuit board ( ). The output port ( ) is connected to a separate power conductor ( ) and a separate ground conductor ( ) which are connected to the LSI ( ) mounted on the circuit board ( ). In another embodiment, the LSI ( ) is mounted on a different circuit board ( ) to which the output port ( ) is connected through conductor pins ( ) standing on the circuit board ( ).

Electronic device for supplying DC power and having noise filter mounted with excellent noise reduction

An external cathode terminal ( ) is adhered to one surface of a capacitor element while a prepreg ( ) is adhered to another surface of the capacitor element. A reinforcement plate ( ) is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material ( A, B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.

A solid electrolytic capacitor has an anode terminal and a cathode terminal for external electrical connection that are formed on one surface of a plate-like or foil-like anode member, and a cathode conductor layer formed such that it covers the area of the one surface of the anode member except for the portion where the anode terminal is secured. A first metal plate or metal foil functioning as the cathode terminal is closely joined to the one surface of the cathode conductor layer so as to cover the one surface of the cathode conductor layer. A second metal plate or metal foil is closely joined to the other surface of the cathode conductor layer so as to cover the other main surface of the cathode conductor layer. The first metal plate or metal foil and the second metal plate or metal foil function to intercept the ventilation between the anode member and the outside.

Solid electrolytic capacitor and manufacturing method for the same

A non-aqueous electrolyte secondary battery comprising: a case comprising a bottom and a sidewall; a rolled body comprising: a positive electrode comprising a first electric plate and a positive electrode active material applied on the first electric plate; a negative electrode comprising a second electric plate and a negative electrode active material applied on the second electric plate; and a separator inserted between the positive electrode and the negative electrode; wherein the rolled body is formed by laminating and rolling the positive electrode, the negative electrode, and the separator; and wherein the rolled body is enclosed in the body; non-aqueous electrolyte enclosed in the case; a header used for sealing the case; a plurality of positive electrode leads connecting the positive electrode and the header; a plurality of negative electrode leads connecting the negative electrode and a bottom of the case; and holding means for holding the rolled body so that the rolled body does not relatively move with respect to the case while keeping a gap between a lower terminal of the rolled body and the bottom of the case and a gap between an upper terminal of the rolled body and the header.

Non-aqueous electrolyte secondary battery having a rolled body therein

In a non-aqueous electrolyte secondary battery in which a battery element which is constructed by forming an anode active material layer and a cathode active material layer on an anode collecting body and a cathode collecting body, respectively, and laminating and winding them together with two separators, is housed in a battery can. An electrical connecting member for electrical connection between an inner electrode lead and an external terminal is designed to have spring property so that a winding core is pressurized and fixed to the center of the battery can, and the battery is structured such that connection between the inner lead and the connecting member can be made on an end face of the winding core inside of the battery can.

Growing community of inventors

Sendai, Japan

Takayuki Inoi