Uacj Corporation

The Furukawa Electric Co., Ltd.

Uacj Foil Corporation

Circuit Foil Japan Co., Ltd.

Nippon Foil Mfg. Co., Ltd.

Nippaku Sangyo Co., Ltd.

Koichi Ashizawa

Satoshi Suzuki

Hitoshi Kato

Masakazu Seki

Tomohiko Furutani

Kenji Yamamoto

Osamu Kato

Toshio Horie

Sohei Saito

Yukiou Honkawa

Mitsuyuki Wasamoto

Shunji Shimizu

Kenichi Kadowaki

Tetsuya Motoi

Tsukasa Akutsu

Yasushi Funato

Hideharu Ogino

Hiroki Arima

Atsushi Koishikawa

Atsushi Mori

A semiconductor manufacturing method by a semiconductor manufacturing device includes: positioning an anode, which causes an oxidation reaction, in a first end of a base material containing an aluminum oxide and a cathode, which causes a reduction reaction, in a second end of the base material; heating the base material to melt it with the anode being in contact with the first end of the base material and the cathode being in contact with the second end of the base material; causing a current to flow between the anode and the cathode to cause a molten salt electrolysis reaction for a whole of or a part of a period in which the base material is at least partially melted; and after the molten salt electrolysis reaction, cooling the base material to form a p-type aluminum oxide semiconductor layer and an n-type aluminum oxide semiconductor layer.

Aluminum oxide semiconductor manufacturing method and aluminum oxide semiconductor manufacturing device

A semiconductor layer of the present invention is a semiconductor layer including: a pn junction at which an n-type semiconductor (AlO(n-type)) and a p-type semiconductor (AlO(p-type)) are joined, the n-type semiconductor (AlO(n-type)) having a donor level that is formed by causing an aluminum oxide film (AlO) to excessively contain aluminum (Al), the p-type semiconductor (AlO(p-type)) having an acceptor level that is formed by causing an aluminum oxide film (AlO) to excessively contain oxygen (O).

Semiconductor layer, oscillation element, and semiconductor layer manufacturing method

A current-collector metal foil has at least at least one roughened surface and numerous recessed parts are present on the roughened surface. Each recessed part has an edge part that surrounds a bottom-surface part and is raised above the bottom-surface part. The average Feret diameter Lof the recessed parts is 0.5-50 &#x3bc;m. The current-collector metal foil is suitable for use, e.g., as an electrode current collector for a lithium-ion secondary battery, a sodium secondary battery, an electric double-layer capacitor, or a lithium-ion capacitor.

Current-collector metal foil, current collector, and current-collector-metal-foil manufacturing method

It is an object to provide an aluminum alloy foil for an electrode current collector, the foil having a high post-drying strength after application of an active material while keeping a high electrical conductivity. Disclosed is an aluminum alloy foil for an electrode current collector, comprising 0.03 to 0.1 mass % (hereinafter, 'mass %' is simply referred to as '%') of Fe, 0.01 to 0.1% of Si, and 0.0001 to 0.01% of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil after final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 60% IACS or higher; and the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at any of 120&#xb0; C. for 24 hours, 140&#xb0; C. for 3 hours, and 160&#xb0; C. for 15 minutes.

Aluminum alloy foil for electrode current collectors and manufacturing method thereof

An aluminum alloy foil for an electrode current collectors has a high post-drying strength after application of an active material while keeping a high electrical conductivity. The aluminum alloy foil includes 0.1 to 1.0 mass % of Fe, 0.01 to 0.5% of Si, and 0.01 to 0.2 mass % of Cu, and the rest includes Al and unavoidable impurities. The aluminum alloy foil after final cold rolling has a tensile strength of 220 MPa or higher, a 0.2% yield strength of 180 MPa or higher, and an electrical conductivity of 58% IACS or higher. The aluminum alloy foil has a tensile strength of 190 MPa or higher and a 0.2% yield strength of 160 MPa or higher after the aluminum alloy foil is heat treated at any of 120&#xb0; C. for 24 hours, 140&#xb0; C. for 3 hours, and 160&#xb0; C. for 15 minutes.

There is provided a current collector for use in a secondary battery on which active material coated on both sides of a metal foil are difficult to drop out. The metal foil is provided with a large number of penetrating holes, the periphery of which are formed into a complicated shape, and active material, binder, etc. are intruded on each periphery, whereby the active material, etc. coated on both sides of the current collector consisting of the metal foil are prevented from dropping out. An area S of penetrating holes is in the range of 0.05 to 0.50 mma value M/N is in the range of 1.30 to 100 wherein M is the peripheral length of the penetrating holes and N is the peripheral length of a virtual circle having the area S of the penetrating hole. The current collector having such a large number of penetrating holes is obtained by passing a metal foil without a hole through between a concavo-convex roll having a large number of convex parts and a smoothing roll. If any burr is produced at each periphery edge of the penetrating holes, the current collector is further caused to pass through between a pair of metal smoothing rolls, whereby the burr produced on each periphery edge of the penetrating holes can be removed.

Current collector with penetrating holes of complicated shape for use in a secondary battery and manufacturing process thereof

Process for preparing porous electrolytic metal foil

An oxygen generating electrode has a base material with at least a surface thereof made of titanium alone or a titanium alloy, a primary coating formed on the surface of the base material, and a catalyst layer formed on the primary coating and containing an oxide of platinum group element as a main component. The primary coating is composed of a titanium oxide coating and an oxide mixture layer, the titanium oxide coating being made of a titanium oxide only and including a first titanium oxide layer formed by electrolytically oxidizing the surface of the base material and a second titanium oxide layer formed on the first titanium oxide layer by a thermal decomposition method, the oxide mixture layer including at least one layer formed on the titanium oxide coating and consisting of a mixture containing an oxide of an element belonging to a group other than the platinum group, as a main component, and an oxide of a platinum group element.

Method of producing an oxygen generating electrode

There is provided a metal foil manufacturing method, in which a metal foil is manufactured by forming a thin metal layer by electrodepositing a metal on the surface of a cathode through an electrolytic reaction, and then separating the thin metal layer from the cathode surface. In doing this, an anodized film forming apparatus is mounted on an exposed surface of the cathode exposed after the separation of the metal layer, and is operated to subject the exposed surface of the cathode continuously or intermittently to electrolytic oxidation, thereby forming an anodized film on the exposed surface. The apparatus comprises electrolytic agent retaining means for retaining an electrolytic agent for anodization in contact with the exposed surface of the cathode, an electrode located in the electrolytic agent in the retaining means and supplied with an electrolytic current at a potential lower than the operating potential of the cathode, and electrolytic agent supply means for supplying the electrolytic agent to the electrolytic agent retaining means.

Metal foil manufacturing method and an anodized film forming apparatus

In an electrolytic solution supply type battery of an arrangement wherein an electrolytic solution is distributed and supplied to each of a plurality of electrically series-connected or stacked unit cells from a common supply path through distribution liquid paths, respectively, and the electrolytic solution is exhausted from each of the plurality of unit cells and collected in a common exhaust path through exhaust liquid paths, respectively, each distribution liquid path at an electrolytic solution supply side and/or each exhaust liquid path has midway therealong a liquid flow interrupt portion utilizing natural fall of the electrolytic solution. At the portion, the electrolytic solution is rendered discontinuous during falling and is formed into droplets, thereby preventing liquid short-circuit between each two adjacent unit cells.

Growing community of inventors

Kusatsu, Japan

Koichi Ashizawa