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    Magnetic head and method of fabricating same
    1.
    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。

    Composite type magnetic head for recording and reproducing high frequency signals
    3.
    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 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 recording and reproducing apparatus
    6.
    发明授权
    Magnetic recording and reproducing apparatus 失效
    磁记录和再现设备

    公开(公告)号：US4571652A

    公开(公告)日：1986-02-18

    申请号：US444224

    申请日：1982-11-24

    申请人： Hideo Fujiwara ,  Shigekazu Otomo ,  Kiminari Shinagawa ,  Noriyuki Kumasaka ,  Takeo Yamashita ,  Mitsuhiro Kudo ,  Teizo Tamura

    发明人： Hideo Fujiwara ,  Shigekazu Otomo ,  Kiminari Shinagawa ,  Noriyuki Kumasaka ,  Takeo Yamashita ,  Mitsuhiro Kudo ,  Teizo Tamura

    IPC分类号： G11B5/133 ,  G11B5/193 ,  G11B5/221

    CPC分类号： G11B5/193 ,  G11B5/133

    摘要： A magnetic recording and reproducing apparatus comprises a magnetic head having magnetic cores in which at least portions thereof in the vicinity of a gap are made of M.sub.n -Z.sub.n ferrite single crystal and planes of the magnetic cores forming a principal magnetic circuit are formed by {110} planes of the ferrite and directions contained in the {110} planes are inclined to a surface facing a magnetic recording medium, and means for relatively moving the magnetic recording medium in an opposite and parallel direction to a projection vector on said surface facing said recording medium, of a vector directed from a site far from the surface facing the magnetic recording medium to a site near said surface in the direction projected on the surface facing the magnetic recording medium. The present magnetic recording and reproducing apparatus exhibits both high wear resistance and excellent read/write characteristic.

    摘要翻译： 一种磁记录和再现装置，包括具有磁芯的磁头，其中至少部分在间隙附近由Mn-Zn铁氧体单晶构成，并且形成主磁路的磁芯的平面由{110 {110}面中包含的铁素体和<100>方向的平面相对于面向磁记录介质的表面倾斜，并且用于使磁记录介质沿与所述表面上的投影矢量相反并且平行的方向相对移动的装置 面向所述记录介质的是从远离面向磁记录介质的表面的位置引导的向量朝向投影在面向磁记录介质的表面的<100>方向上的所述表面附近的位置。 本磁记录和再现装置具有高耐磨性和优良的读/写特性。

    Amorphous alloys for magnetic head core and video magnetic head using same
    8.
    发明授权
    Amorphous alloys for magnetic head core and video magnetic head using same 失效
    用于磁头磁芯和视频磁头的非晶合金使用相同的

    公开(公告)号：US4411716A

    公开(公告)日：1983-10-25

    申请号：US282805

    申请日：1981-07-13

    申请人： Kazuo Shiiki ,  Shigekazu Otomo ,  Mitsuhiro Kudo ,  Takeshi Kimura ,  Noriyuki Kumasaka ,  Hideo Fujiwara

    发明人： Kazuo Shiiki ,  Shigekazu Otomo ,  Mitsuhiro Kudo ,  Takeshi Kimura ,  Noriyuki Kumasaka ,  Hideo Fujiwara

    IPC分类号： H01F1/153 ,  C22C45/00 ,  C22C45/02 ,  C22C45/04 ,  G11B5/127 ,  G11B5/147 ,  G11B5/21 ,  C22C33/00

    CPC分类号： C22C45/008 ,  G11B5/127 ,  G11B5/21

    摘要： Amorphous alloys for magnetic head cores of a composition which is expressed by a general formula (Co.sub.x Fe.sub.1-x).sub.a Cr.sub.b Si.sub.c B.sub.1-a-b-c wherein the value of x is in the range between 0.925 and 0.97, the value of a is in the range between 0.74 and 0.76, the value of b is in the range between 0.005 and 0.03 and the value of c is in the range between 0.06 and 0.18, and wherein a+b+c.ltoreq.0.94, and a magnetic head for video equipment wherein at least one foil of one of the aforesaid alloys having a width of below 30 .mu.m is used. The amorphous alloys of the aforesaid composition are high in permeability, high in saturation magnetic flux density and low in magnetostriction. A magnetic head for video equipment using such alloys has excellent characteristics in that it has high recording and reproducing characteristics and a high output/noise ratio and shows little magnetic after effect.

    摘要翻译： 用于由通式（CoxFe1-x）aCrbSicB1-abc表示的组合物的磁头芯的非晶合金，其中x的值在0.925和0.97之间，a的值在0.74和0.76之间的范围内 ，b的值在0.005和0.03之间并且c的值在0.06和0.18之间的范围内，并且其中a + b + c <0.94，以及用于视频设备的磁头，其中至少一个 使用宽度为30μm以下的上述合金之一的箔。 上述组成的非晶态合金的磁导率高，饱和磁通密度高，磁致伸缩性低。 使用这种合金的视频设备的磁头具有优异的特性，因为它具有高的记录和再现特性以及高的输出/噪声比，并且显示出很小的磁效应。