Sanyo Electric Co., Ltd.

Takahisa Iida

Mutsumi Yano

Mamoru Kimoto

Hiroshi Nonoue

Kazuhiro Takatani

Takashi Umemoto

Hiroaki Izu

Yasumi Kobayashi

Koichi Nishimura

A solid electrolytic capacitor, having a small equivalent series resistance, is formed by burying a capacitor element inside an epoxy resin outer package. The capacitor element includes an anode, having part of an anode lead buried therein, a dielectric layer formed on the anode and containing a niobium oxide, and a cathode formed on the dielectric layer. The cathode includes a first electrolyte layer containing a conductive polymer and formed on the dielectric layer, an intermediate layer containing an organic silane and formed on the first electrolyte layer, a second electrolyte layer containing a conductive polymer and formed on the intermediate layer, a first conductive layer containing carbon particles and formed on the second electrolyte layer, and a second conductive layer containing silver particles and formed on the first conductive layer.

Solid electrolytic capacitor and method for producing the same

In this solid electrolytic capacitor, a plate-shaped anode having a porous sintered body, a dielectric layer and an electrolyte layer of polypyrrole are formed in this order for covering one part of an anode lead. An intermediate layer of aminopropyltriethoxysilane (APTES) is formed for covering the electrolyte layer. A cathode having a first conductive layer containing graphite particles and a second conductive layer containing silver particles is formed for covering the intermediate layer. The cathode and a cathode terminal are connected by a conductive adhesive layer. The anode lead and the anode terminal are connected by welding. Further, a mold outer resin is formed to allow one end of the cathode terminal and one end of the anode terminal to project therefrom.

Solid electrolytic capacitor and manufacturing method thereof

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 &#x3bc;m to approximately 10 &#x3bc;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.

Solid electrolytic capacitor element, manufacturing method therefor, and solid electrolytic capacitor

A solid electrolytic capacitor includes a capacitor element having a niobium oxide layer arranged between an anode and a cathode, and an outer package covering the capacitor element. The niobium oxide layer contains fluorine and phosphorus, and the outer package contains epoxy resin, phenol resin, filler and an imidazole compound.

Solid electrolytic capacitor and method of manufacturing solid electrolytic capacitor

A solid electrolytic capacitor element includes a first oxide layer formed on an anode. The solid electrolytic capacitor further includes a second oxide layer formed on the first oxide layer, and a cathode formed on the second oxide layer. The first oxide layer includes NbOand the second oxide layer includes NbO(1&#x2266;x &#x2266;2).

Solid electrolytic capacitor element, manufacturing method of solid electrolytic capacitor element and solid electrolytic capacitor

A capacitor element comprises an anode, a dielectric layer formed on the anode, an electrolyte layer formed on the dielectric layer, and a cathode formed on the electrolyte layer. On the cathode formed by the surface of the capacitor element, a conductive adhesive layer containing silver particles and an organic silane layer made from aminopropyltriethoxysilane (APTES) are sequentially formed, and the cathode and a cathode terminal are connected through the conductive adhesive layer and the organic silane layer. In addition, an anode terminal is connected to an anode lead which exposed from the anode by welding.

Capacitors and methods for manufacturing the same

The objective of the current invention is to provide a solid electrolytic capacitor element with low equivalent series resistance. In this solid electrolytic capacitor element, an anode including a porous sintered body, and a dielectric layer are sequentially formed on an anode lead so as to cover a portion of the anode lead. An intermediate layer including polyethylene glycol is formed on the dielectric layer so as to cover an area around the dielectric layer. An electrolyte layer that includes polypyrrole is formed on the intermediate layer so as to cover an area around the intermediate layer. A cathode that includes: a first electrically conductive layer mainly including graphite particles and a second electrically conductive layer mainly including silver particles is formed on the electrolyte layer so as to cover an area surrounding the electrolyte layer.

Solid electrolytic capacitor element, solid electrolytic capacitor, and manufacturing method therefor

An anode includes a base body of a sintered porous material of niobium particles, a surface layer made of crystalline niobium oxide formed on the base body, and an anode lead having partly buried in base body. A dielectric layer containing amorphous niobium oxide is formed by anodic oxidation on the cathode. An electrolyte layer made of polypyrrole is formed on the dielectric layer and a cathode is formed on the electrolyte layer. A conductive adhesive layer and cathode terminal are formed on an upper surface of the cathode. The anode lead exposed from the base body is connected to an anode terminal by welding. In addition, a mold resin is formed to cover the second conductive layer, the cathode terminal and the anode terminal so as to expose cathode terminal and an end of anode terminal.

Solid electrolytic capacitor and method of manufacturing the same

A solid electrolytic capacitor having an anode of valve metals or of an alloy of which main component is valve metals; a dielectric layer formed by anodizing said anode; an electrolyte layer formed on said dielectric layer; and a cathode formed on said electrolyte layer; wherein said cathode has a silver layer using silver and sulfur and/or sulfur compound is contained in said silver layer.

Solid electrolytic capacitor

In this solid electrolytic capacitor, a plate-shaped anode having a porous sintered body is formed covering one part of an anode lead. A dielectric layer is formed covering the anode. An electrolyte layer of tantalum carbide is formed covering the dielectric layer. A cathode is formed covering the electrolyte layer. A conductive adhesive layer is formed on the upper surface of the cathode, and the cathode and a cathode terminal are connected by the conductive adhesive layer. An anode terminal is connected by welding the anode terminal on the anode lead projecting from the anode. Further, a mold outer resin is formed around the second conductive layer, the cathode terminal and the anode terminal.

A solid electrolytic capacitor comprising: an anode of valve metals or alloy of which main component is valve metals; a dielectric layer formed by anodizing the anode; and a cathode formed on the dielectric layer, wherein the dielectric layer comprises a first dielectric layer located on the anode side and a second dielectric layer formed on the first dielectric layer, and oxygen concentration of the second dielectric layer is decreased from the first dielectric layer side toward the cathode side.

Solid electrolytic capacitor and fabrication method therefor

The present invention provides a solid electrolytic capacitor with low leakage current. In the solid electrolytic capacitor, an anode has an anode lead made of tantalum, a surface layer made of niobium formed on the anode lead, and a rectangular block shaped base body having a porous sintered body made from niobium particles, and the anode lead is partially embedded in the base body. Onto the anode, an oxide layer made of niobium oxide, an electrically conductive polymer layer, and a cathode laminated with a first electrically conductive layer and a second electrically conductive layer are sequentially laminated. Onto the top surface of an area surrounding the cathode, a cathode terminal is formed through an electrically conductive adhesive layer. Also, an anode terminal is connected onto an edge of the anode lead.

A solid electrolytic capacitor comprising: an anode of niobium or niobium alloy; and a dielectric layer formed by anodizing the anode; wherein the anode comprises a surface layer of niobium silicide formed at an interface between the dielectric layer and itself, and silicon is contained in the dielectric layer.

Growing community of inventors

Hirakata, Japan

Takahisa Iida