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    MAGNETIC TRANSDUCER HEAD
    12.
    发明专利
    MAGNETIC TRANSDUCER HEAD 未知

    公开(公告)号：CA1235483A

    公开(公告)日：1988-04-19

    申请号：CA476839

    申请日：1985-03-19

    Applicant: SONY CORP

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

    IPC: G11B5/127 ,  G11B5/147 ,  G11B5/187 ,  G11B5/23 ,  G11B5/245 ,  G11B5/33 ,  G11B5/193 ,  G11B5/31

    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 the 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 the 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 highhardness. 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 hazing 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.

    16.
    发明专利
    未知

    公开(公告)号：DE69725369T2

    公开(公告)日：2004-06-24

    申请号：DE69725369

    申请日：1997-03-18

    Applicant: SONY CORP

    Inventor： KONDO HIROFUMI ,  HANAOKA HIDEAKI ,  KOBAYASHI TOMIO

    IPC: C03C17/30 ,  C07F7/18 ,  C08G65/00 ,  C08G65/336 ,  C08J7/04 ,  C09D4/00 ,  C09D5/14 ,  C09D5/16 ,  C09D183/04 ,  C09D183/12 ,  G02B1/10 ,  G02B1/115 ,  G02B1/14 ,  G02B1/18

    Abstract: To provide a composition for forming an antifouling film with which an antifouling film excellent in stain resistance, scratch resistance, solvent resistance, etc. can be formed and an optical component having such an antifouling film, for example, an anti-reflection filter. An antifouling film is formed by a composition for forming the antifouling film containing an alkoxysilane compound having a perfluoropolyether group indicated by the following general formula (1): Rf(COR1-R2-Si(OR3)3üj where, in the formula, Rf indicates a perfluoropolyether group, R1 indicates a bivalent atom or group, R2 indicates an alkylene group, R3 indicates an alkyl group, and j is 1 or 2.

    17.
    发明专利
    未知

    公开(公告)号：DE3586404D1

    公开(公告)日：1992-09-03

    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 THIN FILM
    18.
    发明专利
    MAGNETIC THIN FILM 未知

    公开(公告)号：CA1272591A

    公开(公告)日：1990-08-14

    申请号：CA478277

    申请日：1985-04-03

    Applicant: SONY CORP

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

    IPC: C22C38/00 ,  G11B5/147 ,  G11B5/31 ,  H01F10/14 ,  H01F41/20

    Abstract: A magnetic thin film consisting essentially of Fe, Al and Si and further containing nitrogen has high magnetic permeability and high hardness without lowering the magnetic properties such as saturation magnetic flux density or coercive force. The 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
    19.
    发明专利
    MAGNETIC TRANSDUCER HEAD 未知

    公开(公告)号：AU583320B2

    公开(公告)日：1989-04-27

    申请号：AU5003785

    申请日：1985-11-19

    Applicant: SONY CORP

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

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

    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.

    MAGNETIC TRANSDUCER HEAD WITH SLANTED THIN FILM
    20.
    发明专利
    MAGNETIC TRANSDUCER HEAD WITH SLANTED THIN FILM 未知

    公开(公告)号：CA1236212A

    公开(公告)日：1988-05-03

    申请号：CA470379

    申请日：1984-12-18

    Applicant: SONY CORP

    Inventor： KOBAYASHI TOMIO ,  SATO HEIKICHI ,  KUBOTA MAKOTO ,  KANO SHOICHI ,  KUMURA TATSUO ,  YAMAUCHI KAZUSHI ,  TAKAHASHI YOSHIMI ,  SAITO JUNICHI

    IPC: G11B5/127 ,  G11B5/187 ,  G11B5/31 ,  G11B5/133 ,  G11B5/33

    Abstract: A magnetic transducer head comprising a first magnetic core element and a second magnetic core element, each of the first and second core elements comprising a magnetic ferrite block and a magnetic metal thin film integrated with the magnetic ferrite block. These core elements having a first planar surface and a second planar surface. The magnetic metal thin film being provided on the second planar surface and having an edge thereof facing to the first planar surface, and the second planar surface being slantly provided with respect to said first planar surface. These core elements being bonded together to form an operating magnetic gap between the edge of the magnetic metal thin film on the first core element and the edge of the magnetic metal thin film on the second core element. The magnetic metal thin film on the first core element or the magnetic thin film on the second core element is formed in one common plane. The magnetic metal thin film may be formed of the ferromagnetic metals including Fe-A?-Si alloys, amorphous metal alloys or permalloy. And the magnetic metal thin film having substantially uniform columnar grain structure or uniform magnetic anisotropy, over entire area of the film.

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