Tdk Corporation

Tdk Corporation and Honda Motor Co., Ltd.

Tsuyoshi Ichiki

Kiyonori Hinoki

Shigeki Oyama

Manabu Iwaida

Kenichi Murakami

Kazutoshi Emoto

Takehiko Sasaki

Koji Shimazawa

Hideki Tanaka

Yoshihiro Tsuchiya

Shinji Hara

Tomohito Mizuno

Kazuo Katai

Yousuke Miyaki

Toshiyuki Ayukawa

In an MR element, first and second ferromagnetic layers are antiferromagnetically coupled to each other through a spacer layer, and have magnetizations that are in opposite directions when no external magnetic field is applied thereto and that change directions in response to an external magnetic field. The spacer layer and the second ferromagnetic layer are stacked in this order on the first ferromagnetic layer. The first ferromagnetic layer includes a plurality of ferromagnetic material layers stacked, and an insertion layer made of a nonmagnetic material and inserted between respective two of the ferromagnetic material layers that are adjacent to each other along the direction in which the layers are stacked. The ferromagnetic material layers and the spacer layer each include a component whose crystal structure is a face-centered cubic structure. The spacer layer and the insertion layer are each composed of an element having an atomic radius greater than that of at least one element constituting the ferromagnetic material layers.

Magnetoresistive element and magnetic head

A method is provided for optimizing the physical characteristics of a coating solution for an undercoat layer formed between a polarizable electrode layer and surface-roughened collector. A first step is carried out to form an undercoat layer on a collector whose surface has been roughened, and a second step is carried out to form a polarizable electrode layer on the undercoat layer. The first step is performed by coating the collector with a coating solution for the undercoat layer that includes electroconductive particles, a binder, and a solvent; the viscosity of the coating solution for the undercoat layer is set to from 0.15 to 0.75 Pa&#xb7;s, and the weight ratio (P/B) of the electroconductive particles (P) and binder (B) is set to from 20/80 to 40/60. The coating area of the undercoat layer can thereby be adjusted with high precision, and the resistance of the undercoat layer can be reduced.

Method for producing electrochemical capacitor electrode

A method is provided for optimizing the physical characteristics of a coating solution for a polarizable electrode layer formed on a collector. A first step is carried out to prepare a coating solution that includes porous particles, a fluorine-based binder, a good solvent that dissolves said fluorine-based binder, and a poor solvent that does not dissolve said fluorine-based binder. A second step is carried out to coat a collector with said coating solution to form the polarizable electrode layer on the collector. The viscosity of said coating solution for the polarizable electrode layer is set to between 0.5 to 3.5 Pa&#xb7;s and a weight ratio (GS/PS) of said good solvent (GS) and said poor solvent (PS) is set to between 60/40 to 80/20. The occurrence of cracks in the polarizable electrode layer and large nonuniformities in the thickness of the polarizable electrode layer can thus be prevented.

An electric chemical capacitor includes first and second electrodes each including a collectora polarized electrode layerand an undercoat layerfor bonding the collector and the polarized electrode layer with each other, and a separator put between the first and second electrodes so that the polarized electrode layersandface each other, wherein an end portion of each undercoat layeris located in the same position as or on the outer side of an end portion of the corresponding polarized electrode layerand located on the inner side of an end portion of the separatorThus, the polarized electrode layers can be prevented from peeling from the collector. Further, the undercoat layers can be prevented from abutting against each other, and the undercoat layer of one electrode and the collector of the other electrode can be prevented from abutting against each other.

Electric chemical capacitor, and method and apparatus for manufacturing electrode for electric chemical capacitor

Growing community of inventors

Tokyo, Japan

Tsuyoshi Ichiki