Matsushita Electric Industrial Co., Ltd.

Yasushi Inoue

Masaharu Miyahara

Kenji Suga

Koichi Osano

Hitoshi Yamanishi

Isamu Aokura

Hiroshi Yohda

Fumio Sakai

A fan-motor-incorporated heat sink effectively supplies cooling air flow in a thin electronic device having limited space above the heat sink. The heat sink enables air intake above the heat sink by positioning a fan, the fins of a heat sink substrate and the side wall of the substrate lower than the fan driving unit. The heat sink substrate and the fins are formed such that air is exhausted only in one direction. A cover is provided on the side of the heat sink substrate on which the fan driving unit is mounted and to which air is taken in to prevent exhausted air from being taken in. The structure of the electronic device is positioned close to the upper surface of the fan driving unit on the heat sink. Thus, the heat sink can be installed on a thin electronic device while improving the cooling of a heat emitting element.

Heat sink and electronic device employing the same

A magnetic head includes a back core made of ferrite and a magnetic alloy film arranged in a vicinity of a magnetic gap and having an average composition expressed by TxMyNz wherein T is Fe or Co; M is at least one metal selected from a group consisting of Nb, Zr, Ta, Hf, Cr, W and Mo; N is nitrogen; and x, y and z are atomic percentages holding 65.ltoreq.x.ltoreq.94, 5.ltoreq.y.ltoreq.25, 0&lt;z.ltoreq.20 and x+y+z=100. The head includes an oxygen diffusion prevention part of a higher concentration of nitrogen than included in the whole magnetic alloy film which is provided at the magnetic alloy film at an interfacial part to the ferrite core.

Magnetic head and manufacturing method therefor

A ring-shaped magnetic head includes magnetic cores made of a metallic magnetic material having a gap therebetween and being held between non-magnetic substrates. A metallic thin film is provided bridging the gap between the magnetic cores for establishing an electrical connection between the magnetic cores. The metallic thin film is formed on a surface of the magnetic head which is opposite to a surface for contacting a magnetic recording medium.

Magnetic head

Growing community of inventors

Neyagawa, Japan

Yasushi Inoue