Nippon Hoso' Kyokai

Mitsumi Electric Company Ltd.

Kabushiki Kaisha Sankyo Seiki Seisakusho

Other

Sumitomo Special Metals Co., Ltd.

Nippon Hose Kyokai

Junji Numazawa

Naoto Hayashi

Kenji Machida

Akira Nakamura

Toshihiro Uehara

Yasuhiko Shinjo

Morio Kondo

Kazutoshi Mutou

Yoshiro Yoneda

Fusayoshi Aruga

Toshiaki Wada

Shinichi Nagahara

Norio Hasegawa

Hideki Mine

Takahisa Tanabe

Makiko Kohro

A magnetic head device having excellent sliding contact between its slider surface and magnetic tape at the time of scanning is provided. This magnetic head device has a base member, a thin-film magnetic head formed in contact with the base member and accommodated in a non-magnetic layer with the top end of a magnetic gap being exposed, and an auxiliary member which sandwiches the non-magnetic layer between the auxiliary member and the base member. On the top ends of the base member, the non-magnetic layer, and the auxiliary member, a slider surface on which magnetic tape slides is formed in the aligning direction of the base member, the non-magnetic layer, and the auxiliary member, or in a direction inclined at a predetermined angle to the aligning direction. Accordingly, the non-magnetic layer can be made thin, and the area of the non-magnetic layer on the slider surface is small. Thus, the space between the magnetic head device and the magnetic tape can be made small, and the sliding contact of the magnetic head device can be improved.

Magnetic head device with a short auxiliary member

A magneto-resistive thin film magnetic head is provided, which magnetic head includes: a base; a first yoke provided on the base and separated by a gap into first and second portions, the first portion including a side which opposes a magnetic recording medium; a magneto-resistive element which is magnetically coupled to the first and second portions of the first yoke and detects a magnetic recording signal; a second yoke formed on the first yoke so as to form a reproducing head gap between the first portion of the first yoke and the second yoke; and a third yoke provided between the first portion of the first yoke and the base so as to be magnetically coupled to the first portion of the first yoke. The reproducing head gap, the first portion of the first yoke, the magneto-resistive element, the second portion of the first yoke, ad the second yoke form a cut magnetic circuit.

Magneto-resistive thin film magnetic head preventing entry of unnecessary magnetic flux and having good reproduction characteristics

A magnetoresistive effect element,is physically configured such that the element width is at least three times as large as the element height. A plurality of domain control layers,to,are located between the magnetoresistive effect element,and a plurality of detecting electrodes,to,in a state that the domain control layers,to,are closely formed on the magnetoresistive effect element,. Each of the domain control layers,to,applies a unidirectional magnetic field to a region of the magnetoresistive effect element,vertically disposed in a guard band of the magnetic recording medium,, the guard band having no information recorded therein. The unidirectional magnetic field is directed in an orientation of an initial magnetization in a single magnetoresistive effect element, the orientation of which depends on a direction of on an easy axis of the magnetoresistive effect element

Magnetic reproducing head having a magnetoresistive effect

A thin film magnetic head for perpendicular magnetic recording includes a magnetic member lying on a wear-resistant substrate of a non-magnetic material and defining a return path for magnetic flux. The magnetic member has a main groove formed in one of its principal surfaces in parallel to a sliding surface adapted to face a magnetic recording medium, and a narrow groove formed in the same principal surface and crossing the main groove at right angles thereto. The main and narrow grooves are filled with a non-magnetic material. The magnetic member carries thereon a laminate formed immediately above the intersection of the main and narrow grooves, and consisting at least of a thin-film conductor coil, an interlayer insulating film, a main pole film and a head-protecting film which are formed one upon another. The narrow groove has a width which is larger than that of the main pole film. The magnetic member is connected to the main pole film through a via hole portion. The magnetic member and the laminate have an exposed surface defining the sliding surface, and the magnetic member is exposed in the vicinity of the main pole film.

Thin-film magnetic head for perpendicular magnetic recording having a

Thin film magnetic head and a method for manufacturing thereof

Perpendicular magnetic recording and reproducing head

Growing community of inventors

Tokyo, Japan

Junji Numazawa