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    MAGNETIC TRANSDUCER HEADS
    21.
    发明专利
    MAGNETIC TRANSDUCER HEADS 未知

    公开(公告)号：GB2158282A

    公开(公告)日：1985-11-06

    申请号：GB8507362

    申请日：1985-03-21

    Applicant: SONY CORP

    Inventor： KUBOTA MAKOTO ,  KUMURA TATSUO ,  SAITO JUNICHI ,  KOBAYASHI TOMIO ,  SATO HEIKICHI

    IPC: G11B5/127 ,  G11B5/187 ,  G11B5/31 ,  G11B5/133

    Abstract: A magnetic transducer head in which the magnetic core elements of ferromagnetic oxides are sliced obliquely across the junction surface of the core elements, ferromagnetic metal thin films are formed on the resulting inclined surfaces by employing a physical vapor deposition, and the core elements are placed with the respective ferromagnetic metal thin films abutting to each other for defining a magnetic gap therebetween, wherein the improvement consists in that said inclined surfaces with the ferromagnetic metal thin films formed thereon are inclined at a preset angle with the magnetic gap forming surface, in that non-magnetic films having high-hardness are interposed between the ferromagnetic oxide and the ferromagnetic metal thin films, and in that said ferromagnetic metal thin films and the oxide glass fillers are provided on the tape abutment surface by the intermediary of the non-magnetic film having high-hardness. The provision of the non-magnetic film having high-hardness between the ferromagnetic oxide and the ferromagnetic metal thin film is effective to inhibit the reaction otherwise occurring between the oxide and the films, while positively preventing the formation of the boundary layer with inferior magnetic properties. Likewise, the provision of the non-magnetic film having high-hardness between the ferromagnetic metal thin film and the oxide glass is effective to prevent the erosion of the film by the molten glass, while also improving the molten glass fluidity. It should be noted that the non-magnetic films having high-hardness may be provided on the interface only between the core elements and the metal thin films or on the interface only between the metal thin films and the oxide glass.

    24.
    发明专利
    未知

    公开(公告)号：DE2950943A1

    公开(公告)日：1980-07-10

    申请号：DE2950943

    申请日：1979-12-18

    Applicant: SONY CORP

    Inventor： KOBAYASHI TOMIO ,  FUKUSHI KOUJI

    IPC: G11B5/31 ,  G11B5/17 ,  G11B5/29 ,  G11B5/28 ,  G11B5/42

    Abstract: A multi-channel magnetic transducer head is formed by combining two core blocks with a magnetic gap therebetween. On the confronting surface of one of two core blocks, there is provided a plurality of parallel grooves. On the confronting surface of another core block, there is provided a gap defining a groove extending perpendicular to the parallel grooves. A plurality of first conductor strips are formed on the confronting surface of the one core and in the parallel grooves and the strips extend in the direction substantially perpendicular to the parallel grooves. Another surface of the one core opposite to the confronting surface is ground until the conductor strips are disposed on the surface and the cores are separated into a plurality of core elements. Second conductor strips are formed on the opposite surface to form coils around the core elements in co-operation with the first conductor strips.

    25.
    发明专利
    未知

    公开(公告)号：DE19641853C2

    公开(公告)日：2001-03-29

    申请号：DE19641853

    申请日：1996-10-10

    Applicant: SONY CORP

    Inventor： HANAOKA HIDEAKI ,  KONDO HIROFUMI ,  KOBAYASHI TOMIO ,  UEDA MITSUNORI

    IPC: C03C17/38 ,  C03C17/42 ,  G02B1/11 ,  G02B1/115 ,  G02B1/18 ,  G09F9/00 ,  H01J29/88 ,  H01J29/89 ,  H04N5/72

    Abstract: PROBLEM TO BE SOLVED: To obtain a display device provided with a filter having reflection preventive property, excellent in resistances to soiling and scuffing and in workability, etc. SOLUTION: This display device is provided with the filter having reflection preventive property wherein the outermost surface of a single layered or multi- layered reflection preventive film 2 formed on a glass base 1 is covered with a compound 3 consisting of perfluoro-polyether or its derivative having a polar group at the terminal.

    28.
    发明专利
    未知

    公开(公告)号：DE3586404T2

    公开(公告)日：1993-03-11

    申请号：DE3586404

    申请日：1985-04-17

    Applicant: SONY CORP

    Inventor： YAMAUCHI KAZUSHI ,  OGATA MUNEYUKI ,  KOBAYASHI TOMIO ,  KUBOTA MAKOTO ,  KUMURA TATSUO

    IPC: C22C38/00 ,  C23C14/06 ,  C23C30/00 ,  G11B5/147 ,  G11B5/31 ,  H01F10/14 ,  H01F10/18

    Abstract: A magnetic thin film consisting essentially of Fe, Al and Si and further containing oxygen has high magnetic permeability and high hardness without lowering the magnetic properties such as saturation magnetic flux density or coercive forceThe magnetic thin film has an increased specific resistivity and a lowered eddy current loss in the high frequency region and is suitable for a core material of magnetic transducer heads used in a high frequency region.The magnetic thin film is prepared by, for example, physical vapor deposition or ion implantation.

    MAGNETIC TRANSDUCER HEAD
    30.
    发明专利
    MAGNETIC TRANSDUCER HEAD 未知

    公开(公告)号：CA1254299A

    公开(公告)日：1989-05-16

    申请号：CA495974

    申请日：1985-11-22

    Applicant: SONY CORP

    Inventor： KOBAYASHI TOMIO ,  KANO SHOICHI ,  MANIWA OSAMU ,  KONNO SEIKI ,  SATO HEIKICHI

    IPC: G11B5/127 ,  G11B5/133 ,  G11B5/187 ,  G11B5/23 ,  G11B5/00

    Abstract: A magnetic transducer head wherein confronting surfaces of a pair of magnetic core parts comprised of a ferromagnetic oxide material are notched, and the notch defining surfaces have metallic ferromagnetic layers supported thereby. The method of physical vapor deposition as known per se is used for forming these layers. The transducer coupling gap of each magnetic head is defined by an aligned pair of pole piece layers formed from the deposited metallic ferromagnetic material. The pole piece layers are inclined at a preset angle with respect to the plane of the coupling gap, and have extensions formed of the deposited metallic ferromagnetic material presenting bend contours between the pole piece layers and the lateral sides of the core parts.

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