Otowa Electric Co., Ltd.

Naoyuki Tsukamoto

Toshihiko Suzuki

Hideyuki Okinaka

Kenta Hiwatari

Shinsuke Takenaka

Yoshimasa Tsujimoto

Hiroyuki Otsuki

Provided is a resin material having non-ohmic properties which has favorable characteristics as a varistor and has a high degree of molding freedom and impact resistance. A resin materialcomprises: an insulating matrixmade of a first resin material; an island-form conductive dispersed phasemade of a conductive second resin material which is incompatible with the first resin material and is more wettable to a microvaristordescribed later than the first resin material is, wherein the island-form conductive dispersed phase is dispersed in an island form in the matrix and has a volume ratio of less than 16% in the whole resin material; and a microvaristorcomprising ceramic particles having non-ohmic properties, wherein the ceramic particles are dispersed in the matrixand electrically contacted with each other via the island-form conductive dispersed phase

Resin material having non-OHMIC properties, method for producing same, and non-OHMIC resistor using said resin material

Provided is a non-linear resistive element which improves the degree of freedom of design of its mounting space. A ceramic sheetwhich constitutes the non-linear resistive element is configured by a plurality of ceramic piecesbeing consolidated in a plate like form by an insulating resin. One or a plurality of ceramic piecesconfigure each of a plurality of conductive paths which penetrate the ceramic sheetin a thickness direction thereof, and the ceramic pieceswhich configure both ends of the conductive paths partially projects from the insulating resin

Non-linear resistive element

Provided is a non-linear resistive element which enables to narrow an interval between a plurality of electrodes. A ceramic sheet () which constitutes the non-linear resistive element is configured by being supported in a sheet like form by a support member () composed of an insulating material. A plurality of ceramic pieces () are sectioned and arranged in each of a plurality of unit areas () which are apart from each other.

Provided is a technique to secure compositional or microstructural uniformity of a ceramic sintered body while increasing the area of the ceramic sintered boy, thus improving basic performance including non-linearity, maximum withstand energy and aging characteristics. A plurality of small varistor piecesand insulating resin are kneaded and extruded for shaping, whereby a sheet-form varistor layercan be formed where a plurality of small varistor piecesare spaced from one another and are aligned on the same plane, and the adjacent small varistor piecesare bonded via insulating resin.

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Amagasaki, Japan

Naoyuki Tsukamoto