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    Magnetic head
    91.
    发明公开
    Magnetic head 失效
    磁头

    公开(公告)号：EP0795852A3

    公开(公告)日：1999-04-07

    申请号：EP97104310.4

    申请日：1997-03-13

    申请人： SONY CORPORATION

    发明人： Matsunaga, Toru ,  Kaneyama, Naoyuki ,  Saito, Takehiko ,  Hayakawa, Masatoshi

    IPC分类号： G11B5/187 ,  G11B5/193

    CPC分类号： G11B5/1878 ,  G11B5/1871 ,  G11B5/193 ,  G11B33/08

    摘要： Sliding noise characteristics can be considerably improved without degrading electromagnetic conversion characteristics and abrasion resistance characteristics in a recording/reproducing operation. A depth (H) of a contact width regulating groove (21) is set to be smaller than a contact width (W) of a magnetic recording medium sliding surface (a), and is set to a predetermined value of 25 µm or more and 45 µm or less. A depth (H) of the contact regulating groove is set to a predetermined value of 37±12 µm, the contact width (W) on the magnetic recording medium sliding surface (a) is set to a predetermined value of 55±6 µm, and a value (R) of a corner portion (51a) of the contact width regulating groove is set to a predetermined value of 16 µm or less.

    摘要翻译： 在记录/再现操作中，滑动噪声特性可以显着提高而不降低电磁转换特性和耐磨损特性。 接触宽度调整槽（21）的深度（H）被设定为小于磁记录介质滑动面（a）的接触宽度（W），并且被设定为25μm或更大的预定值，并且 45微米或更小。 接触限制槽的深度（H）被设定为37±12μm的规定值，磁记录介质滑动面（a）的接触宽度（W）被设定为55±6μm的规定值， 并且接触宽度调节槽的角部（51a）的值（R）被设定为16μm或更小的预定值。

    EP0880128A4 -
    93.
    发明公开
    EP0880128A4 - 失效
    EP0880128A4 - Google专利

    公开(公告)号：EP0880128A4

    公开(公告)日：1998-11-25

    申请号：EP96915178

    申请日：1996-05-17

    IPC分类号： G11B5/187 ,  G11B5/60 ,  G11B21/21

    CPC分类号： G11B5/6005 ,  Y10T29/49041

    摘要： A magnetic head is produced by forming nonlinear rails on the flying plane by etching and polishing the plane with abrasive cloth such as nonwoven polyester fabric in order to remove the redeposit forward during the etching of the magnetic head slider and to form minute chamfers on the plane. As a result, the redeposit is removed and the stability of magnetic head flying is improved.

    摘要翻译： 磁头是通过在飞行平面上形成非线性轨道，通过用诸如非织造聚酯织物之类的砂布对平面进行蚀刻和抛光，以便在磁头滑块的蚀刻过程中去除向前的再沉积并在平面上形成微小倒角 。 结果，重新沉积被去除并且磁头飞行的稳定性得到改善。

    Magnetic head and producing method of the same
    98.
    发明公开
    Magnetic head and producing method of the same 失效
    Magnetkopf und Herstellungsverfahren。

    公开(公告)号：EP0646907A3

    公开(公告)日：1996-10-09

    申请号：EP94115437.9

    申请日：1994-09-30

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Honma, Yoshiyasu ,  Masaki, Ken ,  Takahashi, Ken

    IPC分类号： G11B5/127 ,  G11B5/187

    CPC分类号： G11B5/1272 ,  G11B5/0086 ,  G11B5/127 ,  G11B5/1276 ,  G11B5/1871 ,  G11B5/1878 ,  G11B5/232 ,  G11B5/53 ,  Y10T29/49046 ,  Y10T29/49052 ,  Y10T29/49057

    摘要： A magnetic head can be made by:
       a first step of butting projection end faces of a pair of magnetic cores (11,12) each of which is previously machined into a convex shape, through a magnetic gap member (1);
       a second step of forming notches (14a,14b) which reach a winding groove (21), at said butted projection end faces of said magnetic cores by an electric discharge machining process, thereby regulating a track width (Tw); and
       a third step of filling under heat treatment glass (15,16) into grooves (17a,18a) at two sides of said pair of convex magnetic cores and said notches . When the magnetic head is used, a magnetic recording/reproduction apparatus which is suitable for high density recording such as a digital VTR is provided.

    摘要翻译： 可以通过以下方式制造磁头：通过磁隙构件对接预先加工成凸形的一对磁芯的突出端面的第一步骤; 通过放电加工处理在所述磁芯的所述对接的突出端面处形成到达卷绕槽的凹口的第二步骤，从而调节轨道宽度; 以及第三步骤，在所述一对凸磁芯和所述凹口的两侧的槽内将热处理玻璃填充到凹槽中。 当使用磁头时，提供适用于高密度记录的磁记录/再现装置，例如数字VTR。

    Magnetic head producing method
    99.
    发明公开
    Magnetic head producing method 失效
    磁头制造方法

    公开(公告)号：EP0725387A3

    公开(公告)日：1996-08-14

    申请号：EP96104172.0

    申请日：1992-04-16

    申请人： SONY CORPORATION

    发明人： Watanabe, Makoto ,  Ogata, Seiichi ,  Ikeda, Yoshito ,  Kanno, Kyu

    IPC分类号： G11B5/187 ,  G11B5/29 ,  G11B5/53

    CPC分类号： G11B5/29 ,  G11B5/0086 ,  G11B5/09 ,  G11B5/115 ,  G11B5/127 ,  G11B5/1272 ,  G11B5/4893 ,  G11B5/531 ,  G11B5/534 ,  G11B23/0007

    摘要： A method of producing a magnetic head comprising the steps of forming a track width restricting groove on each of a pair of head core blocks (91); fusion joining the head core blocks (91) to each other with glass while the head core blocks (91) are positioned with the track width resticting grooves aligned with each other; forming, on at least one of a pair of faces of the head core blocks (91) remote from joining faces at which the head core blocks (91) are joined to each other, a groove at an angle substantially equal to an azimuth angle of a magnetic gap of a magnetic head to be produced; and cutting the head core blocks (91) in a direction substantially perpendicular to a bottom face of the groove to form a head chip.

    摘要翻译： 一种制造磁头的方法，包括以下步骤：在一对磁头芯块（91）中的每一个上形成磁道宽度限制槽; 将头芯块（91）彼此用玻璃熔接在一起，同时头芯块（91）定位成使轨迹宽度取消槽彼此对准; 在所述头芯块（91）的远离所述头芯块（91）彼此接合的接合面的一对面中的至少一个面上形成凹槽，所述凹槽的角度基本等于方位角 待制造的磁头的磁隙; 以及在基本垂直于凹槽底面的方向上切割头芯块（91）以形成头芯片。

    Magnetic head
    100.
    发明公开
    Magnetic head 失效
    磁头

    公开(公告)号：EP0703571A3

    公开(公告)日：1996-07-31

    申请号：EP95114758.6

    申请日：1995-09-19

    申请人： SONY CORPORATION

    发明人： Suzuki, Atsushi ,  Hayakawa, Masatoshi ,  Matsunaga, Toru ,  Tamaru, Takashi ,  Urai, Akira

    IPC分类号： G11B5/133 ,  G11B5/193 ,  G11B5/187

    CPC分类号： G11B5/1878 ,  G11B5/133 ,  G11B5/1335 ,  G11B5/1871 ,  G11B5/193 ,  G11B5/255

    摘要： A magnetic head having a pair of magnetic core halves integrally bonded to each other, each magnetic core half being formed by a single-crystal ferrite piece and a polycrystal ferrite piece bonded together to constitute a junction ferrite, with a magnetic gap being defined between abutting surfaces of the magnetic core halves. The single-crystal ferrite pieces are arranged towards the abutting surfaces of the magnetic core halves and the polycrystal ferrite pieces are arranged on the opposite side of the abutting surfaces with respect to the single-crystal ferrite pieces. Preferably, the surface of the single-crystal ferrite piece having sliding contact with the magnetic recording medium, the gap surface of the single-crystal ferrite piece and the surface of the single-crystal ferrite piece corresponding to the lateral surface of the magnetic head are the (211) plane, (111) plane and the (110) plane, respectively. The directions of the 〈100〉 crystal axes within the plane (100) are symmetrical to each other on both sides of the magnetic gap. The magnetic head is low in sliding noise and superior in electro-magnetic conversion characteristics. In addition, the magnetic recording medium is superior in abrasion characteristics since the partial advancing abrasion is prohibited from occurring on its surface configured to have sliding contact with the magnetic recording medium.

    摘要翻译： 一种磁头，具有一对彼此整体结合的磁芯半体，每个磁芯半体由结晶在一起构成结型铁氧体的单晶铁氧体片和多晶铁氧体片形成，其间的磁隙限定在邻接 磁芯半部的表面。 单晶铁氧体片朝向磁芯半部的邻接表面布置，并且多晶铁氧体片相对于单晶铁氧体片布置在邻接表面的相对侧上。 优选地，与磁记录介质滑动接触的单晶铁氧体片的表面，单晶铁氧体片的间隙表面以及与磁头的侧表面相对应的单晶铁氧体片的表面是 （211）面，（111）面和（110）面。 平面（100）内的<100>晶轴的方向在磁隙的两侧彼此对称。 磁头滑动噪声低，电磁转换特性优异。 另外，由于在与磁记录介质滑动接触的表面上禁止发生部分前进磨损，所以该磁记录介质具有优异的磨损特性。