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    Composite type magnetic head for recording and reproducing high frequency signals
    2.
    发明授权
    Composite type magnetic head for recording and reproducing high frequency signals 失效
    用于记录和再现高频信号的复合型磁头

    公开(公告)号：US4656547A

    公开(公告)日：1987-04-07

    申请号：US608407

    申请日：1984-05-09

    申请人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Mitsuhiro Kudo

    发明人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Mitsuhiro Kudo

    IPC分类号： G11B5/127 ,  G11B5/187 ,  G11B5/23 ,  G11B5/245 ,  G11B5/147 ,  G11B5/17

    CPC分类号： G11B5/1874

    摘要： There is provided a structure of a composite type magnetic head and its manufacturing method. The composite type magnetic head comprises: two high permeability ferrite blocks with projections having nearly edged sections formed thereon; magnetic films having a high saturation flux density deposited on the side faces of the projections, the magnetic films confronting each other via a functional gap near front ends of said projections; guard films deposited over the magnetic films comprising a non-magnetic material; and non-magnetic materials filled on the guard films up to side face of the coil. This magnetic head exhibits excellent recording and reproducing characteristics. The contour effect is negligibly small. The reaction between the magnetic film and the non-magnetic material is prevented by the guard film.

    摘要翻译： 提供复合型磁头的结构及其制造方法。 复合型磁头包括：两个高磁导率铁氧体块，其上形成有几乎边缘的突起; 沉积在突起的侧面上的具有高饱和磁通密度的磁性膜通过在所述突起的前端附近的功能间隙相互面对; 保护膜沉积在包含非磁性材料的磁性膜上; 以及填充在保护膜上的非磁性材料直到线圈的侧面。 该磁头具有出色的记录和再现特性。 轮廓效应可忽略不计。 保护膜可防止磁性膜与非磁性材料之间的反应。

    Magnetic head and method of fabricating same
    3.
    发明授权
    Magnetic head and method of fabricating same 失效
    磁头及其制造方法

    公开(公告)号：US4559572A

    公开(公告)日：1985-12-17

    申请号：US575704

    申请日：1984-01-31

    申请人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Nobuo Kobayashi ,  Mitsuhiro Kudo

    发明人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Shinji Takayama ,  Noritoshi Saito ,  Nobuo Kobayashi ,  Mitsuhiro Kudo

    IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/23 ,  G11B5/31 ,  G11B5/12

    CPC分类号： G11B5/147 ,  G11B5/3106

    摘要： A magnetic head core and a method of fabricating same, wherein a magnetic circuit is constituted by a pair of magnetic films having a V-shaped cross section which face each other at each protrudent section through the gap material. The cross-sectional portion of the V-shaped film is exposed to the surface facing the magnetic recording medium. The protrusions of the magnetic film pair have tip planes parallel to each other and substantially perpendicular to the moving direction of the magnetic recording medium. The tip plane has a width defined by the line of intersection between the plane and the surface facing the magnetic recording medium in correspondence to the recording track width. At least one of the magnetic films has a window for winding an excitation coil. The magnetic film is formed on the non-magnetic protection member having a V-shaped protrusion. The magnetic head has superior recording and reproducing characteristics in a wide frequency band with less rubbing noise, high wear-resistivity and high productivity, and operates without the pseudo gap effect. The magnetic head core is fabricated through the steps of forming a coil winding groove in the gap forming plane of a non-magnetic core block, forming a number of parallel grooves perpendicularly to the winding groove so that a number of V-shaped protrusions are produced, forming a magnetic film on the surface of the protrusions, forming a gap plane after the magnetic film has been coated with non-magnetic material, and splitting the block and then combining the two core blocks to complete a magnetic head core.

    摘要翻译： 一种磁头芯及其制造方法，其中磁路由通过间隙材料的每个突出部分彼此面对的具有V形横截面的一对磁膜构成。 V形膜的横截面部分暴露于面向磁记录介质的表面。 磁性膜对的突起具有彼此平行的并且基本上垂直于磁记录介质的移动方向的尖端平面。 尖端平面具有与记录轨道宽度相对应的平面与面向磁记录介质的表面之间的交点线限定的宽度。 至少一个磁性膜具有用于缠绕励磁线圈的窗口。 磁性膜形成在具有V形突起的非磁性保护构件上。 磁头在宽频带具有优异的记录和再现特性，具有较少的摩擦噪声，高耐磨性和高生产率，并且没有伪间隙效应。 通过在非磁性芯块的间隙形成平面中形成线圈绕槽的步骤制造磁头芯，与绕组槽垂直地形成多个平行的沟槽，从而产生多个V形突起 在突起的表面上形成磁性膜，在磁性膜被非磁性材料涂覆之后形成间隙平面，分割该块，然后组合两个核心块，从而形成磁头芯。

    Magnetic head having an integrated recording and playback head and an erasure head
    5.
    发明授权
    Magnetic head having an integrated recording and playback head and an erasure head 失效
    具有集成的记录和回放头和擦除头的磁头

    公开(公告)号：US4774616A

    公开(公告)日：1988-09-27

    申请号：US694386

    申请日：1984-12-04

    申请人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito ,  Mitsuhiro Kudo

    发明人： Noriyuki Kumasaka ,  Hideo Fujiwara ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito ,  Mitsuhiro Kudo

    IPC分类号： G11B5/31 ,  G11B5/265 ,  G11B5/16 ,  G11B5/22

    CPC分类号： G11B5/2651 ,  G11B5/2655

    摘要： The present invention relates to a magnetic head, which can form guard bands on a magnetic recording medium and which is especially suitable for magnetic discs, and a fabrication process thereof. The magnetic core of the present invention includes a recording and reproduction head core (31) and an erasure head core (32) which is integrally joined in series to the head core (31) for forming guard bands. Magnetic circuits are constructed of metallic magnetic materials (34), (34'), (35) and (35') formed on non-magnetic members (33) and (33'). As a result, a recording medium having high coercive forces can be recorded while the track width is reduced and the fabrication is facilitated with a high accuracy.

    摘要翻译： PCT No.PCT / JP84 / 00159 Sec。 371日期1984年12月4日第 102（e）日期1984年12月4日PCT提交1984年4月2日PCT公布。 公开号WO84 / 03984 日期：1984年10月11日。磁头技术领域本发明涉及一种能够在磁记录介质上形成保护带并且特别适用于磁盘的磁头及其制造方法。 本发明的磁芯包括记录和再现头芯（31）和擦除头芯（32），它与头芯（31）串联成一体，用于形成防护带。 磁路由形成在非磁性构件（33）和（33'）上的金属磁性材料（34），（34'），（35）和（35'）构成。 结果，可以记录具有高矫顽力的记录介质，同时减小轨道宽度并且以高精度促进制造。

    Magnetic head having short distance between gaps for recording reproducing and erasing
    9.
    发明授权
    Magnetic head having short distance between gaps for recording reproducing and erasing 失效
    用于记录再现和擦除的间隙之间具有短距离的磁头

    公开(公告)号：US4847715A

    公开(公告)日：1989-07-11

    申请号：US941648

    申请日：1986-12-15

    申请人： Noriyuki Kumasaka ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito

    发明人： Noriyuki Kumasaka ,  Shigekazu Otomo ,  Takeo Yamashita ,  Noritoshi Saito

    IPC分类号： G11B5/265

    CPC分类号： G11B5/2655

    摘要： A tunnel erasing-type magnetic head having a short distance between the gaps, wherein a second core half is sandwiched between the first core half and the third core half, a magnetic gap for recording and reproducing the signals is formed between the first core half and the second core half, and a magnetic gap for erasing is formed between the second core half and the third core half, so that the second core half can be utilized for both recording and reproducing the signals and erasing the signals. The second core half is obtained by forming a thin magnetic film of a high saturation flux density on the base portion composed of a nonmagnetic material that forms the magnetic gap. The first and third core halves are also obtained by forming a thin magnetic film of a high saturation flux density on the magnetic gap surfaces of the base portions to produce performance that can be used for the magnetic recording media having high coercive force. The magnetic head has a short distance between the gaps. When used for a floppy disk apparatus, therefore, there does not develop under-erasing or over-erasing even for small disks, and the effective track width does not decrease, either. This head can be used also as the one in which an ordinary erasing head element and a recording and reproducing head element are combined together.

    摘要翻译： 一种在间隙之间具有短距离的隧道擦除型磁头，其中第二芯体半部夹在第一芯部半部和第三芯部半部之间，用于记录和再生信号的磁隙形成在第一芯部半部和 第二磁芯半部和用于擦除的磁隙形成在第二磁芯半部和第三磁芯半部之间，使得第二磁芯半部可以用于记录和再现信号并擦除信号。 通过在由形成磁隙的非磁性材料构成的基部上形成具有高饱和磁通密度的薄磁膜来获得第二芯体半部。 通过在基部的磁隙表面上形成具有高饱和磁通密度的薄磁膜也可获得第一和第三半芯，以产生可用于具有高矫顽磁力的磁记录介质的性能。 磁头在间隙之间具有短距离。 因此，当用于软盘设备时，即使对于小盘也不会发生欠擦除或过度擦除，并且有效轨道宽度也不会降低。 该头也可以用作将普通擦除头元件和记录和再现头元件组合在一起的头。

    Magnetic head made from amorphous magnetic film
    10.
    发明授权
    Magnetic head made from amorphous magnetic film 失效
    磁头由非晶磁性膜制成

    公开(公告)号：US4766039A

    公开(公告)日：1988-08-23

    申请号：US875222

    申请日：1986-06-17

    申请人： Shigekazu Otomo ,  Noriyuki Kumasaka ,  Noritoshi Saito ,  Takeo Yamashita ,  Kazuo Shiiki ,  Yoshihiro Hamakawa

    发明人： Shigekazu Otomo ,  Noriyuki Kumasaka ,  Noritoshi Saito ,  Takeo Yamashita ,  Kazuo Shiiki ,  Yoshihiro Hamakawa

    IPC分类号： G11B5/11 ,  G11B5/127 ,  G11B5/147 ,  G11B5/31 ,  G11B5/39 ,  H01F10/12 ,  H01F10/13 ,  H01F10/16

    CPC分类号： G11B5/11 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/31 ,  G11B5/39 ,  Y10S428/90

    摘要： A magnetic head comprising a magnetic film in at least a part of a magnetic circuit, at least a part of the magnetic film being formed in contact with, or being exposed to, an oxide or oxygen at least in a heating step at 150.degree. C. or higher in a process for preparing the magnetic head is disclosed. An amorphous alloy film for the magnetic film has the following composition formula to give distinguished head characteristics without any oxidation:Co.sub.a T.sub.b Zr.sub.c N.sub.dwhere T is at last one of Nb, Ta, W, Mo, V and Cr; N is at least one of Au, Pt and Ag; d.gtoreq.1, b>0, b.sub.1 +b.sub.2 +2c.gtoreq.10, a+d.gtoreq.80, -1.ltoreq.(3c-b.sub.1 -3b.sub.2 -5b.sub.3 -3b.sub.4 -4d)/(c+b.sub.1 +b.sub.2 +b.sub.3 +b.sub.4 +d).ltoreq.1, and a+b+c+d=100, where b.sub.1 is a Nb concentration, b.sub.2 is a Ta concentration, b.sub.3 is a W concentration, b.sub.4 is sum total of Mo, Cr and V concentrations and b=b.sub.1 +b.sub.2 +b.sub.3 +b.sub.4.

    摘要翻译： 磁头包括至少一部分磁路中的磁性膜，至少一部分磁性薄膜至少在150℃的加热步骤中与氧化物或氧气接触或暴露于氧化物或氧气中 公开了一种用于制备磁头的方法。 用于磁性膜的非晶态合金膜具有以下组成式，可以得到无特殊的头部特性：没有任何氧化：CoaTbZrcNd，其中T是Nb，Ta，W，Mo，V和Cr中的最后一个; N是Au，Pt和Ag中的至少一种; d> / = 1，b> 0，b1 + b2 + 2c> / = 10，a + d> / = 80，-1（3c-b1-3b2-5b3-3b4-4d）/（c + b1 + b2 + b3 + b4 + d）