Sharp Kabushiki Kaisha Corporation

Sharp Corporation

Masaru Kadono

Tatsushi Yamamoto

Mitsuhiko Yoshikawa

Kumio Nago

Shuuhei Tsuchimoto

Toshiyuki Fujine

Tetsurou Muramatsu

Masashi Michijima

Tersuro Muramatsu

Masatoshi Tomita

A magnetic thin film for a magnetic head includes an iron film layer formed on a substrate and including N chemically not combined with Fe, and a sendust film layer formed on the iron film layer and having a (111) plane orientation.

Magnetic thin film for magnetic head, method of manufacturing the same,

A method of manufacturing a magnetic head includes a first step of forming rectilinear V grooves on the top surface of a substrate, a second step of forming magnetic films on slant faces of the V grooves, a third step of leveling the top surface of the substrate after filing the V grooves with glass, a forth step of dividing the substrate into first and second substrates, a fifth step of forming grooves for coil winding on the top and bottom surfaces of each substrate, a sixth step of melting the glass of each V groove and bonding the first and second substrates, and a seventh step of slicing the bonded body, the first step including a step of forming the V grooves by means of a first grinding wheel and a step of finishing one of slant faces of the V grooves by means of a second grinding wheel, of which end is V-shaped, so that the slant has smaller surface roughness, the second grinding wheel being shaped such that one of the grinding wheel surfaces comes into contact with one of the slant faces of the V groove while the other grinding wheel surface has a clearance against the other slant face of the V grooves.

Method of manufacturing a magnetic head

Disclosed is a magnetic head core material having very high corrosion resistance even under severe conditions and a method for preparing the same. The material consists of 3 to 6 wt % of aluminum, 7 to 12 wt % of silicon, not more than 3 wt % of chromium and the substantial balance being iron.

Magnetic head core

A production method for producing a high permeability alloy film which includes evaporating an alloy material composed of 1-6 wt % Al, 20-35 wt % Si, and the remainder of iron by irradiating the alloy with an electron beam, and then depositing the vapor from the alloy material onto a substrate for a predetermined time to produce an alloy film composition having a high permeability. The vapor deposition onto the substrate is preferably intercepted with the shutter until the concentration of aluminum of the vapor to be deposited has been decreased to a value between 20 and about 4 wt %.

Production method of a high magnetic permeability alloy film

A method for producing a high magnetic permeability alloy film, wherein an alloy material composed of 1-6 wt % Al, 20-35 wt % Si and the remainder of iron is irradiated with an electron beam in a vacuum deposition apparatus equipped with an electron gun, and the vapor of the alloy material is deposited on a substrate for a predetermined time to form a high magnetic permeability alloy film, comprising further a step of preventing the irregular deposition caused if the concentration of aluminum in the vapor to be deposited increases.

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Nara, Japan

Masaru Kadono