Ngk Insulators, Inc.

Yayo Akai

Soichiro Matsuzawa

Nobuhiro Terada

A thin-film magnetic circuit board is disclosed which includes: a first and a second substrate formed of a magnetic material; a non-magnetic layer for bonding these substrates to each other; at least one coil formed from an electrically conductive film to provide a circuit pattern, each coil having a spiral shape and surrounding a predetermined blank portion of at least one of the first and second substrates; a pair of leads which are electrically connected to opposite ends of the circuit pattern formed by the coil(s); and a connector formed from a magnetic film, for magnetically connecting the first and second substrates. The connector is fixed to the predetermined blank portion of the first and/or second substrates. Also is disclosed a magnetic head including this thin-film magnetic circuit board.

Thin-film magnetic circuit board and magnetic head using the same

A method of producing a magnetic head core having a coil-winding groove around which an annular magnetic path is formed, and a magnetic gap intersecting the magnetic path, and a track having a predetermined track width and extending in a direction perpendicular to the magnetic gap, the magnetic gap and track being formed in a medium-sliding surface of the head core. The method includes the steps of: forming a track precursor in a surface of a core body which gives the medium-sliding surface of the head core, the track precursor having a larger width than a predetermined track width, and extending across the magnetic gap in a longitudinal direction of the core body; and pressing a shearing tool against the track precursor, and applying a force to the shearing tool to thereby remove by shearing at least one of widthwise opposite portions of the track precursor adjacent to the magnetic gap, so as to form the track having a predetermined track width in the vicinity of the magnetic gap.

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Nagoya, Japan

Yayo Akai