Abstract: A thin-film magnetic head constructed in the manner that a magnetic circuit is composed of a base of magnetic material and a thin-film magnetic core layer, which form an operating gap at the front end thereof and a rear junction at the rear end of the magnetic core layer, and a conductor layer forming a winding is provided between the base and the magnetic core layer. The magnetic core layer has a larger width at the portion where it crosses over the conductor layer, than at the operating gap portion, whereby magnetic fluxes generated by electric current flowing through the conductor layer are effectively passed through the magnetic core layer and so recording efficiency is improved.

Abstract: A thin-film magnetic head constructed by depositing a conductor layer formed in a spiral pattern having two or more turns on a magnetic substrate. A non-magnetic insulating layer is then formed to fill the spaces between turns of the conductive layer in such a manner that the thickness of the non-magnetic layer is substantially the same as that of the conductor layer. A further non-magnetic insulating layer and a magnetic layer are formed successively on the non-magnetic layer. A gap is formed on one side of the lamination between the magnetic layer and the magnetic substrate interposing the further non-magnetic insulating layer. A magnetic circuit through the magnetic layer and the magnetic substrate around the conductive layer includes therein the gap.

Abstract: A thin film magnetic head having a contact surface which, when such magnetic head is in use, slidingly contacts a magnetic information carrier, such as a magnetic tape, drum or disc, for the information recording or reproduction. The magnetic head comprises a support substrate on which a thin magnetic layer and a non-magnetic layer are deposited in side-by-side relation to each other. The non-magnetic insulating layer has a wear resistance equal to or higher than that of the thin magnetic layer. A method for the manufacture of the thin film magnetic head is also disclosed.

Abstract: This invention provides a thin film magnetic head composed of at least one conductive body layer formed in a magnetic material substrate with grooves therein, each groove being filled with a non-magnetic material, an insulating layer formed on the face of the magnetic material substrate including the conductive body layers, and a magnetic material layer formed on the insulating body layer. To precisely form the groove, an electrolytic etching process of the substrate and an annealing process of the substrate surface layer are combined to provide an straight-line property of the groove and the groove section, circular in arc, with better reproducibility.

Abstract: A thin film type magnetic head, in which a conductor is accommodated within a groove formed in part of a ferromagnetic substrate constituting part of a magnetic core, and a ferromagnetic film is disposed on the conductor to constitute part of the magnetic core. With this structure, it is possible to reduce the number of steps of layers constituting the magnetic head for reducing damage or breakage of the stepped portions of the layers and also increase the core gap in a central part of the core so as to reduce leakage flux even in the thin film magnetic head as well as bettering dissipation of Joule heat produced in the conductor.

Abstract: A bias conductor layer for a bias current path extends through the gaps of a plurality of unit thin-film magnetic heads, which are placed side by side over signal conductor layers. A spacer layer is provided between upper and lower magnetic material layers and extends over the area including the gaps formed between the bias conductor layer and the signal conductor layers, and an additional thickness of spacer material is provided at the gaps so that the distance between the upper and lower magnetic material layers is increased and therefore magnetic short-circuiting is avoided.

Abstract: A multi-element magnetic head having a plurality of magnetic heads, in which a common electrode common to the coils of the individual heads is provided. By this construction the number of electrodes is reduced and also the area required for contact between leads from an external circuit and electrodes are reduced. Thus, it is made possible to reduce the head pitch of the magnetic heads.

Abstract: A magnetic head consists of a magnetic flux converging core having a magnetic gap and a magnetoresistive effect element which forms a magnetic circuit and which is arranged in the same plane as the magnetic gap. The direction of thickness of the magnetic circuit is aligned with the direction of width of a track of a record medium, and shielding plates of ferromagnetic material are arranged on both sides of the plane.

Abstract: This invention provides a high sensitivity magnetic head using magneto-resistive effect elements consisting of ferromagnetic thin plates and allows construction of a high precision multi-track head by using thin film and photo-etching techniques. The magnetic head comprises a base, two flux converging cores forming a magnetic gap, a detecting portion provided between the two flux converging cores and extending at right angles to the end of the base, one end of the detecting portion being located in the neighborhood of the gap and having a smaller sectional area than the other portions, and detecting electrodes provided at the opposite ends of the detecting portion. At least one of the two cores is of a ferromagnetic material and integrally formed on the base.

Abstract: A multi-element made magnetic head having a plurality of magnetoresistive elements of a ferromagnetic material such as permalloy formed on a base of a ferromagnetic material such as ferrite is disclosed. The ferromagnetic material base is formed with a groove, which is common for all elements made extends parallel to the recording medium. It is filled with a non-magentic material such as glass, and the individual magnetoresistive elements are disposed so as to bridge the groove and are not adapted to be in direct frictional contact with the recording medium for reducing their wear. The magnetoresistive elements are also made to extend perpendicular to the recording medium so as to increase the head density or reduce the head pitch.

Abstract: A thin film magnetic head includes a magnetic core formed by first and second magnetic layers with at least one winding of conductor layer provided therebetween. Separating layers are provided to electrically isolate the conductor layer from its neighboring layers. The separating layers are semiconductor layers.

Abstract: A magnetic head in which ferromagnetic thin plates sandwiching a non-magnetic layer between them are arranged on a non-magnetic substrate in such a way that a gap formed by the non-magnetic layer is provided on the side facing the recording medium, and the ends of the ferromagnetic thin plates which are vertically separated by the gap are cross-linked with a magnetoresistance effect element.