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    Thin-film magnetic head that locally projects an element part toward a recording medium by thermal expansion
    1.
    发明授权
    Thin-film magnetic head that locally projects an element part toward a recording medium by thermal expansion 有权
    通过热膨胀将元件部分局部投射到记录介质的薄膜磁头

    公开(公告)号：US08072710B2

    公开(公告)日：2011-12-06

    申请号：US12105057

    申请日：2008-04-17

    申请人： Mitsuo Kawasaki ,  Kiyoshi Kobayashi ,  Tomoo Otsuka ,  Hironori Namba ,  Yusuke Kanekuni

    发明人： Mitsuo Kawasaki ,  Kiyoshi Kobayashi ,  Tomoo Otsuka ,  Hironori Namba ,  Yusuke Kanekuni

    IPC分类号： G11B5/33

    CPC分类号： G11B5/3133 ,  G11B5/3116 ,  G11B5/6064

    摘要： A thin-film magnetic head comprises a reproducing element formed on an undercoat film on a head substrate surface, a recording element formed on the upper side of the reproducing element, and a heater formed on the upper or lower side of the reproducing element, the heater generating heat upon energization so as to project at least the reproducing element by thermal expansion toward a recording medium. A shield layer is formed between the reproducing element and the heater by a plurality of layers including at least first and second shield layers. In the first and second shield layers, the second upper shield layer located closer to the heater is formed by a material having a coefficient of thermal expansion smaller than that of the first shield layer located closer to the reproducing element.

    摘要翻译： 薄膜磁头包括形成在头基板表面上的底涂膜上的再现元件，形成在再现元件的上侧的记录元件和形成在再现元件的上侧或下侧的加热器， 加热器在通电时产生热量，以便通过热膨胀将至少再现元件投射到记录介质。 通过包括至少第一和第二屏蔽层的多个层，在再现元件和加热器之间形成屏蔽层。 在第一和第二屏蔽层中，位于更靠近加热器的第二上屏蔽层由热膨胀系数小于靠近再生元件的第一屏蔽层的材料形成。

    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。

    Reflectance Control Optical Element and Ultrathin Film Light Absorption Enhancing Element
    3.
    发明申请
    Reflectance Control Optical Element and Ultrathin Film Light Absorption Enhancing Element 审中-公开
    反射控制光学元件和超薄膜光吸收增强元件

    公开(公告)号：US20080007852A1

    公开(公告)日：2008-01-10

    申请号：US11883530

    申请日：2006-02-07

    申请人： Mitsuo Kawasaki

    发明人： Mitsuo Kawasaki

    IPC分类号： G02B5/26 ,  B05D3/06 ,  G11B7/24

    CPC分类号： G02B5/206 ,  B82Y20/00 ,  G02B5/08 ,  G02B5/09 ,  G02B2207/101

    摘要： The present invention provides a simple-structured reflectance control optical element whose reflectance can be significantly changed and precisely controlled. A transparent film is provided on a substrate having a high reflectance, and further on the surface, an ultrathin film consisting of a metal thin film in which metal nanoparticles having an average particle diameter of 10 nm or less are adjacent to or in contact with each other. The metal is at least any of a single platinum group element, an alloy of platinum group elements, and an alloy of a platinum group element and nickel. The thus obtained element having a three-layer structure has a characteristic of a sharp drop in the reflectance to the light of a given wavelength. By appropriately selecting the thickness or the refractive index of the transparent film, the thickness or the materials of the ultrathin film, and the like, it is possible to control the reflectance according to wavelength. In particular, the metal thin film consisting of a platinum group element makes it feasible to easily control the presence or absence of the ultrathin film by pulsed laser irradiation. Moreover, the present invention provides a light absorption enhancing element in the ultrathin film taking advantage of the reflectance modulation characteristics.

    摘要翻译： 本发明提供一种其反射率可以显着改变和精确控制的简单结构的反射控制光学元件。 在具有高反射率的基板上提供透明膜，并且在表面上还包括由金属薄膜构成的超薄膜，其中平均粒径为10nm以下的金属纳米颗粒相邻或接触每个 其他。 该金属为铂族元素，铂族元素的合金，铂族元素和镍的合金中的至少任一种。 由此获得的具有三层结构的元件具有对给定波长的光的反射率的急剧下降的特性。 通过适当选择透明膜的厚度或折射率，超薄膜的厚度或材料等，可以根据波长控制反射率。 特别地，由铂族元素构成的金属薄膜可以通过脉冲激光照射容易地控制超薄膜的存在或不存在。 此外，本发明利用反射调制特性提供了超薄膜中的光吸收增强元件。

    Corrosion-resistant soft magnetic film, method of producing the same, thin film magnetic head using the same and method of manufacturing the thin film magnetic head
    9.
    发明授权
    Corrosion-resistant soft magnetic film, method of producing the same, thin film magnetic head using the same and method of manufacturing the thin film magnetic head 有权
    耐腐蚀软磁性膜，其制造方法，使用其的薄膜磁头及其制造方法

    公开(公告)号：US06898054B2

    公开(公告)日：2005-05-24

    申请号：US09867825

    申请日：2001-05-30

    申请人： Mitsuo Kawasaki ,  Yoshihiro Kanada

    发明人： Mitsuo Kawasaki ,  Yoshihiro Kanada

    IPC分类号： C22C38/00 ,  G11B5/31 ,  H01F10/14 ,  H01F41/24 ,  G11B5/147

    CPC分类号： H01F10/14 ,  G11B5/3109

    摘要： A lower pole layer and/or an upper pole layer is formed by plating a soft magnetic film represented by the formula FeXNiYαZ (wherein element α is at least one of Tc, Ru, Rh, Pd, Re, Os, Ir and Pt), wherein the composition ratio X of Fe is 65% by mass to 74% by mass, the composition ratio Y of Ni 25% by mass to 34% by mass, the composition ratio Z of the element α is 1% by mass to 7% by mass, and X+Y+Z=100% by mass. Therefore, a thin film magnetic head adaptable to a higher recording density and having excellent corrosion resistance can be manufactured.

    摘要翻译： 通过电镀由下式表示的软磁性膜形成下极层和/或上电极层： （其中元素α为Tc，Ru，Rh，Pd，Re，Os，Ir和Pt中的至少一种），其中Fe的组成比X为65质量％至74质量％，Ni的组成比Y 25质量％至34质量％，元素α的组成比Z为1质量％至7质量％，X + Y + Z = 100质量％。 因此，可以制造适应于更高记录密度并具有优异耐腐蚀性的薄膜磁头。