Taiyo Yuden Co., Ltd.

Kiyoshi Tanaka

Atsushi Tanada

Hideki Ogawa

Hitoshi Matsuura

Hiroshi Kishi

Kenji Kawano

Kenji Otake

Masahiro Hachiya

Tetsuyuki Suzuki

Tsuyoshi Matsumoto

Toshiyuki Yagasaki

Hiroya Shigemoto

Hiroyuki Higuchi

A magnetic body constituted by magnetic grains bonded together via oxide film, which magnetic grains contain a Fe&#x2014;Si-M soft magnetic alloy (where M is a metal element more easily oxidized than Fe) that contains sulfur atoms (S). The magnetic body preferably contains 0.004 to 0.012 percent by weight of S, 1.5 to 7.5 percent by weight of Si, and 2 to 8 percent by weight of metal M.

Magnetic body and electronic component using the same

A magnetic material constituted by a grain compactobtained by shaping metal grainsand then heat-treating them in an oxidizing ambience, wherein the metal grainsare made of a Fe&#x2014;Cr&#x2014;Si alloy and their Fe/(Fe+Fe) ratio as measured before shaping by XPS, with respect to the sum of integral values at the peaks of 709.6 eV, 710.7 eV and 710.9 eV, or Fe, and peak integral value at 706.9 eV, or Fe, is 0.2 or more.

Magnetic material and coil component using the same

A coil-type electronic component having a coil inside or on the surface of a base material is characterized in that the base material of the coil-type electronic component is constituted by a group of soft magnetic alloy grains inter-bonded via oxide layers, multiple crystal grains are present in each soft magnetic alloy grain, and the oxide layers preferably have a two-layer structure whose outer layer is thicker than the inner layer.

Coil-type electronic component

A coil-type electronic component having a coil inside or on the surface of a base material, characterized in that the base material of the coil-type electronic component is constituted by a group of soft magnetic alloy grains whose main ingredients are iron, silicate and chromium, and that an oxide layer is formed on the surface of each soft magnetic alloy grain, where the oxide layer is produced as a result of oxidization of the grain and has more chromium than the alloy grain, and this oxide layer has a two-layer structure constituted by an inner layer whose main ingredient is chromium oxide and an outer layer whose main ingredient is iron-chromium oxide, and the outer layers of soft magnetic alloy grains are inter-bonded.

A coil-type electronic component has a coil inside or on the surface of its base material and is characterized in that: the base material is constituted by a group of grains of a soft magnetic alloy containing iron, silicon and other element that oxidizes more easily than iron; the surface of each soft magnetic alloy grain has an oxide layer formed on its surface as a result of oxidization of the grain; this oxide layer contains the other element that oxidizes more easily than iron by a quantity larger than that in the soft magnetic alloy grain; and grains are bonded with one another via this oxide layer.

Method for manufacturing a coil-type electronic component

A coil-type electronic component has a coil inside or on the surface of its base material wherein the base material in the coil-type electronic component is constituted by a group of grains of a soft magnetic alloy containing iron, silicon and other element that oxidizes more easily than iron; the surface of each soft magnetic alloy grain has an oxide layer formed on its surface as a result of oxidization of the grain; this oxide layer contains the other element that oxidizes more easily than iron by a quantity larger than that in the soft magnetic alloy grain; and grains are bonded with one another via this oxide layer. The coil-type electronic component can be produced at low cost and combines high magnetic permeability with high saturation magnetic flux density.

Coil-type electronic component and process for producing same

A coil-type electronic component has a coil inside or on an outer surface of its base material and is characterized in that: the base material is constituted by a group of grains of a soft magnetic alloy containing iron, silicon and other element that oxidizes more easily than iron; the surface of each soft magnetic alloy grain has an oxide layer formed on its surface as a result of oxidization of the grain; the oxide layer contains the other element that oxidizes more easily than iron by a quantity larger than that in the soft magnetic alloy grain; and grains are bonded with one another via the oxide layer.

Coil-type electronic component and its manufacturing method

As an embodiment, a pair of first conductive filmsare formed from the side face to the bottom face of the sheet partof a magnetic core, and one endof the conductive wire of the coiland the other endof the conductive wire are joined to the side facesof the first conductive films, respectively. Also, as an embodiment, the joined partsare sandwiched by the side facesof the first conductive filmsand the partof the magnetic sheathcovering the side face of the sheet partof the magnetic core, wherein the parts of the magnetic sheathcovering the joined partsare sandwiched by the side facesof the first conductive filmsand the side facesof second conductive filmsas well as the side facesof third conductive films

Growing community of inventors

Takasaki, Japan

Kiyoshi Tanaka