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    1.
    发明专利
    未知

    公开(公告)号：DE69220401T2

    公开(公告)日：1997-10-16

    申请号：DE69220401

    申请日：1992-03-24

    Applicant: SONY CORP

    Inventor： OGATA SEIICHI ,  SATO HEIKICHI ,  KAWAGUCHI MORIYUKI ,  KANOTA KEIJI ,  KUBOTA YUKIO ,  ABE IWAO

    IPC: G11B5/265 ,  G11B5/09 ,  G11B5/127 ,  G11B5/29 ,  G11B5/48 ,  G11B5/53 ,  G11B20/12 ,  G11B27/032 ,  G11B27/036 ,  H04N9/804 ,  H04N9/806

    Abstract: A magnetic head comprises a head base (56), and a pair of magnetic head chips (57, 58) of different azimuth angles ( theta 1, theta 2) disposed on the head base (56). The pair of magnetic head chips (57, 58) are disposed in a stepped arrangement with respect to the direction of arrangement of tracks on a magnetic recording medium with a step (DA) substantially equal to the pitch (P) of tracks on the magnetic recording medium. The gap distance (GL) between the magnetic gaps of the magnetic head chips (57, 58) is shorter than the sum of the length (L) of interblock gap regions between video signal regions and audio signal regions arranged along the direction of movement of the magnetic head, and the step (D) between the adjacent tracks on the magnetic recording medium. The magnetic head enables satisfactory after-recording and the long-time recording reproducing of digital video signals on the magnetic recording medium even if the magnetic recording medium is a narrow magnetic tape of 8 mm or below in width.

    3.
    发明专利
    未知

    公开(公告)号：FR2573902A1

    公开(公告)日：1986-05-30

    申请号：FR8517470

    申请日：1985-11-26

    Applicant: SONY CORP

    Inventor： KONNO SEIKI ,  SATO HEIKICHI

    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.

    4.
    发明专利
    未知

    公开(公告)号：AT154720T

    公开(公告)日：1997-07-15

    申请号：AT92105055

    申请日：1992-03-24

    Applicant: SONY CORP

    Inventor： OGATA SEIICHI ,  SATO HEIKICHI ,  KAWAGUCHI MORIYUKI ,  KANOTA KEIJI ,  KUBOTA YUKIO ,  ABE IWAO

    IPC: G11B5/265 ,  G11B5/09 ,  G11B5/127 ,  G11B5/29 ,  G11B5/48 ,  G11B5/53 ,  G11B20/12 ,  G11B27/032 ,  G11B27/036 ,  H04N9/804 ,  H04N9/806

    Abstract: A magnetic head comprises a head base (56), and a pair of magnetic head chips (57, 58) of different azimuth angles ( theta 1, theta 2) disposed on the head base (56). The pair of magnetic head chips (57, 58) are disposed in a stepped arrangement with respect to the direction of arrangement of tracks on a magnetic recording medium with a step (DA) substantially equal to the pitch (P) of tracks on the magnetic recording medium. The gap distance (GL) between the magnetic gaps of the magnetic head chips (57, 58) is shorter than the sum of the length (L) of interblock gap regions between video signal regions and audio signal regions arranged along the direction of movement of the magnetic head, and the step (D) between the adjacent tracks on the magnetic recording medium. The magnetic head enables satisfactory after-recording and the long-time recording reproducing of digital video signals on the magnetic recording medium even if the magnetic recording medium is a narrow magnetic tape of 8 mm or below in width.

    5.
    发明专利
    未知

    公开(公告)号：DE3511361C2

    公开(公告)日：1993-11-25

    申请号：DE3511361

    申请日：1985-03-28

    Applicant: SONY CORP

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

    IPC: G11B5/127 ,  G11B5/187 ,  G11B5/193 ,  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.

    MAGNETIC TRANSDUCER HEAD
    8.
    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.

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