Sanyo Electric Co., Ltd.

Atsushi Inoue

Takahiro Ogawa

Kiyotaka Ito

Yutaka Ueta

Kazuhiko Koga

Masanori Hongo

Fumio Kameoka

Satoru Ota

Yoshifumi Fukumoto

Hiroyasu Egashira

A slider body and a yoke each made of a ferromagnetic oxide are butted against each other with a gap spacer provided therebetween. An air bearing portion is formed on the upper surface of the slider body. The yoke has a width t smaller than the width w of the air bearing portion, and is covered over both side faces thereof with glass and bonded to the slider body with the glass.

Magnetic head slider

A floating type composite magnetic head includes a head core fixed to a slider formed of nonmagnetic material. In the head core, a pair of magnetic core halves are abutted against each other with nonmagnetic material such as SiO.sub.2 or the like interposed therebetween. The first and second magnetic core half members have first and second gap forming surfaces to be abutted against each other to define a magnetic gap (g), respectively. A first groove is formed on the second gap forming surface. A glass layer is formed in the first groove. A first thin film including a ferromagnetic metal thin film is selectively formed on the first gap forming surface. A second thin film including a ferromagnetic metal thin film is selectively formed on the second gap forming surface so that at least a portion except the surface of the glass layer in the second gap forming surface is exposed. A second groove is formed on the exposed second gap forming surface adjacent to the first groove. The first and second magnetic core half members are abutted and bonded with glass so that the first and second gap forming surfaces face each other so that the first and second thin films are abutted with SiO.sub.2 or the like interposed therebetween to define a magnetic gap (g). Causes of occurrence and an increase of false gaps are suppressed and a decrease in manufacturing yield due to separation of thin films or the like can be prevented.

Method of manufacturing floating type magnetic head

A floating-type magnetic head comprising a slider and a core chip secured thereto. The core chip comprises a pair of core segments joined together with a gap spacer and a thin ferromagnetic metal film which are formed at the joint only over a portion of the entire area of the joint which portion terminates at the face of the core chip to be opposed to magnetic recording media. The two core segments area bonded to each other with glass present over the remaining portion of the joint area. In producing the magnetic head, the core chip is prepared by fabricating a core block comprising a pair of base plates joined together and strips of thin ferromagnetic metal film and gap spacer provided at the joint, and machining the core block.

A process for producing magnetic heads of the floating type

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Yao, Japan

Atsushi Inoue