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    Magnetic film and thin film magnetic head using this magnetic film
    2.
    发明授权
    Magnetic film and thin film magnetic head using this magnetic film 有权
    使用这种磁性膜的磁性膜和薄膜磁头

    公开(公告)号：US07288333B2

    公开(公告)日：2007-10-30

    申请号：US10659119

    申请日：2003-09-10

    申请人： Mitsuo Kawasaki ,  Hisayuki Yazawa ,  Yoshihiro Kanada

    发明人： Mitsuo Kawasaki ,  Hisayuki Yazawa ,  Yoshihiro Kanada

    IPC分类号： G11B5/31 ,  G11B5/127

    CPC分类号： C25D3/562 ,  C25D5/18 ,  C25D7/001 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/313 ,  G11B5/3163 ,  H01F10/16 ,  Y10T428/115 ,  Y10T428/1186 ,  Y10T428/1193 ,  Y10T428/32 ,  Y10T428/325

    摘要： A soft magnetic film of the present invention is a plated film composed of Co and Fe, and columnar crystals extending in the film thickness direction are provided. In the present invention, columnar crystals extending in the film thickness direction are provided so that an improvement in the surface roughness of the film surface and an improvement in the corrosion resistance can be achieved. Furthermore, the saturation magnetic flux density Bs can also be improved by making the crystal fine and eliminating the need for addition of the noble metal element. That is, according to a CoFe alloy of the present invention, both the corrosion resistance and the saturation magnetic flux density Bs can be improved, and specifically, the above-mentioned saturation magnetic flux density Bs can be increased to 2.35 T or more.

    摘要翻译： 本发明的软磁性膜是由Co和Fe组成的镀膜，并且设置在膜厚度方向上延伸的柱状晶体。 在本发明中，提供了沿膜厚方向延伸的柱状晶体，从而可以实现膜表面的粗糙度的提高和耐腐蚀性的提高。 此外，通过使晶体细化并且不需要添加贵金属元素，也可以提高饱和磁通密度Bs。 也就是说，根据本发明的CoFe合金，可以提高耐腐蚀性和饱和磁通密度Bs，特别是上述饱和磁通密度Bs可以提高到2.35T以上。

    Soft magnetic film and thin film magnetic head using soft magnetic film, process for manufacturing soft magnetic film and process for manufacturing thin film magnetic head
    3.
    发明授权
    Soft magnetic film and thin film magnetic head using soft magnetic film, process for manufacturing soft magnetic film and process for manufacturing thin film magnetic head 有权
    使用软磁膜的软磁性膜和薄膜磁头，制造软磁膜的工艺和制造薄膜磁头的工艺

    公开(公告)号：US07433153B2

    公开(公告)日：2008-10-07

    申请号：US10235262

    申请日：2002-09-05

    申请人： Yoshihiro Kanada ,  Hisayuki Yazawa

    发明人： Yoshihiro Kanada ,  Hisayuki Yazawa

    IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B23/00

    CPC分类号： B82Y25/00 ,  G11B5/3109 ,  G11B5/3163 ,  H01F10/14 ,  H01F10/16 ,  H01F10/324 ,  H01F41/26

    摘要： The upper magnetic pole layer and/or lower magnetic pole layer comprises a soft magnetic film having a variable region in which the chemical composition of Fe changes in the direction of thickness in at least a part thereof, and the difference of the proportions of Fe between the regions most abundant in Fe and most deficient in Fe is 4% by mass or more in the variable region. The structure of the soft magnetic film permits the saturation magnetic flux density Bs to be improved while decreasing the coercive force Hc by forming fine crystal grains, thereby enabling a thin film magnetic head excellent in high density recording to be manufactured.

    摘要翻译： 上磁极层和/或下磁极层包括具有可变区域的软磁性膜，其中Fe的化学组成在其至少一部分中在厚度方向上变化，并且Fe之间的比例差异 Fe最丰富，Fe含量最多的区域在可变区域中为4质量％以上。 通过形成微细的晶粒，软磁性膜的结构能够提高饱和磁通密度Bs，同时降低矫顽力Hc，从而能够制造出高密度记录性优异的薄膜磁头。

    Thin-film magnetic write head
    8.
    发明授权
    Thin-film magnetic write head 失效
    薄膜磁写头

    公开(公告)号：US06560076B1

    公开(公告)日：2003-05-06

    申请号：US09651627

    申请日：2000-08-30

    申请人： Hisayuki Yazawa ,  Yoshihiro Kanada

    发明人： Hisayuki Yazawa ,  Yoshihiro Kanada

    IPC分类号： G11B533

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3103 ,  G11B5/3163 ,  G11B5/332 ,  G11B5/3967 ,  G11B2005/3996

    摘要： A thin-film magnetic write head includes a lower core layer composed of a magnetic material and an upper core layer composed of a magnetic material. The upper core layer is opposed to the lower core layer with a nonmagnetic gap layer therebetween at a surface facing a recording medium. The thin-film magnetic write head writes data to be read by a thin-film magnetic read head, which has a track width Tr and a distance H2 between an upper shielding layer and a lower shielding layer. The length in the track width direction at a magnetic contact between the gap layer and the upper core layer is 1 &mgr;m or less. The formula A≦H1−H2 is satisfied A is a difference between the height of the upper surface of the gap layer on a center line in the track width direction and the height of the upper surface of the gap layer at a distance Tr/2 from the center line in the track width direction. H1 is a gap length of the gap layer.

    摘要翻译： 薄膜磁写头包括由磁性材料构成的下芯层和由磁性材料构成的上芯层。 上芯层与面向记录介质的表面之间具有非磁性间隙层的下芯层相对。 薄膜磁性写入头写入要由上磁屏蔽层和下屏蔽层之间具有磁道宽度Tr和距离H2的薄膜磁读头读取的数据。 间隙层和上芯层之间的磁接触处的轨道宽度方向上的长度为1um以下。 公式A <= H1-H2满足A是在轨道宽度方向上的中心线上的间隙层的上表面的高度与间隔层的上表面的高度之间的距离Tr / 2从轨道宽度方向的中心线。 H1是间隙层的间隙长度。