公开(公告)号：US06813824B2

公开(公告)日：2004-11-09

申请号：US10328542

申请日：2002-12-23

申请人： Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

发明人： Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

IPC分类号： G11B5127

CPC分类号： G11B5/313 ,  G11B5/17 ,  G11B5/3163 ,  Y10T29/49034 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49073

摘要： A liquid resist is introduced between adjacent conductive lines of a coil pattern girdling around a magnetic core piece. When the liquid resist is cured, an insulating resin filler can be fixed between the adjacent conductive lines of the coil pattern. An insulating metallic layer is formed to extend over the insulting resin filler and the conductive lines of the coil pattern. Thereafter, the insulating metallic layer is subjected to a flattening grinding treatment until at least a part of the conductive line is exposed at a flattened surface. Of the resist, of a higher fluidity, penetrates in every hole and corner between the adjacent conductive lines, the gap defined between the adjacent conductive lines is fully filled with the insulating material. No voids remain in the gap. The conductive line of the coil can be reliably prevented from corrosion or oxidation. Moreover, a relatively brittle of fragile insulating resin filler is reliably prevented from being subjected to the flattening.

公开(公告)号：US06567239B1

公开(公告)日：2003-05-20

申请号：US09716345

申请日：2000-11-20

申请人： Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

发明人： Minoru Hasegawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Takashi Sekikawa ,  Hiroshi Maeda ,  Masahiro Kakehi ,  Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida

IPC分类号： G11B5147

CPC分类号： G11B5/313 ,  G11B5/17 ,  G11B5/3163 ,  Y10T29/49034 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49073

摘要： A liquid resist is introduced between adjacent conductive lines of a coil pattern girdling around a magnetic core piece. When the liquid resist is cured, an insulating resin filler can be fixed between the adjacent conductive lines of the coil pattern. An insulating metallic layer is formed to extend over the insulting resin filler and the conductive lines of the coil pattern. Thereafter, the insulating metallic layer is subjected to a flattening grinding treatment until at least a part of the conductive line is exposed at a flattened surface. Since the liquid of the resist, of a higher fluidity, penetrates in every hole and corner between the adjacent conductive lines, the gap defined between the adjacent conductive lines is fully filled with the insulating material. No voids remain in the gap. The conductive line of the coil can be reliably prevented from corrosion or oxidation. Moreover, a relatively brittle of fragile insulating resin filler is reliably prevented from being subjected to the flattening grinding treatment.

摘要翻译： 在围绕磁芯片的线圈图案的相邻导线之间引入液体抗蚀剂。 当液体抗蚀剂固化时，可以在线圈图案的相邻导电线之间固定绝缘树脂填料。 绝缘金属层形成为在绝缘树脂填料和线圈图案的导线上延伸。 此后，对绝缘金属层进行平坦化研磨处理，直到导电线的至少一部分在平坦表面露出。 由于具有较高流动性的抗蚀剂的液体渗透在相邻导电线之间的每个孔和拐角处，所以相邻导电线之间限定的间隙被绝缘材料完全充满。 间隙中没有空隙。 可以可靠地防止线圈的导线腐蚀或氧化。 此外，可靠地防止相对脆弱的脆性绝缘树脂填料进行平坦化研磨处理。

公开(公告)号：US06751052B1

公开(公告)日：2004-06-15

申请号：US09611009

申请日：2000-07-06

申请人： Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida ,  Teruo Kiyomiya ,  Yoshinori Ohtsuka ,  Hiroshi Maeda ,  Minoru Hasegawa ,  Masahiro Kakehi ,  Takashi Sekikawa ,  Yukinori Ikegawa

发明人： Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Syuji Nishida ,  Teruo Kiyomiya ,  Yoshinori Ohtsuka ,  Hiroshi Maeda ,  Minoru Hasegawa ,  Masahiro Kakehi ,  Takashi Sekikawa ,  Yukinori Ikegawa

IPC分类号： G11B5147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/00813 ,  G11B5/012 ,  G11B5/313 ,  G11B5/3967 ,  G11B2005/3996

摘要： A thin film magnetic head includes an upper and a lower magnetic pole layer extending forward from a central magnetic core within a thin film coil. A narrow upper and lower front magnetic pole piece are connected to the front ends of the upper and lower magnetic pole layer, respectively. The upper front magnetic pole piece extends rearward from its front end exposed at a medium-opposed surface. The lower front magnetic pole piece extends in a lateral direction along the medium-opposed surface by a lateral width larger than that of the upper front magnetic pole piece. The lower front magnetic pole piece extends rearward from the medium-opposed surface by a longitudinal length smaller than that of the upper front magnetic pole piece. The lower front magnetic pole piece serves to concentrate the magnetic flux at the front ends of the upper and lower front magnetic pole pieces. Since the lower front magnetic pole piece is designed to have a larger lateral width in the lateral direction irrespective of a smaller length in the longitudinal direction, the production of the lower front magnetic pole piece can remarkably be facilitated.

摘要翻译： 薄膜磁头包括从薄膜线圈内的中心磁芯向前延伸的上磁极层和下磁极层。 一个窄的上，下前磁极片分别连接到上磁极层和下磁极层的前端。 上前磁极片从其在中间相对表面处暴露的前端向后延伸。 下部前磁极片沿着中间相对表面沿横向宽度大于上部前磁极片的横向宽度延伸。 下部前磁极片从介质相对表面向后延伸的纵向长度小于上部前磁极片的纵向长度。 下部前磁极片用于将磁通集中在上，前前磁极片的前端。 由于下侧前磁极片被设计成在横向方向上具有较大的横向宽度，而与长度方向上的较短长度无关，因此可以显着地促进下部前磁极片的制造。

公开(公告)号：US06822831B2

公开(公告)日：2004-11-23

申请号：US10074185

申请日：2002-02-12

申请人： Shoji Ikeda ,  Yuji Uehara ,  Ikuya Tagawa ,  Naoki Takeguchi ,  Masahiro Kakehi

发明人： Shoji Ikeda ,  Yuji Uehara ,  Ikuya Tagawa ,  Naoki Takeguchi ,  Masahiro Kakehi

IPC分类号： G11B5147

CPC分类号： H01F10/147 ,  G11B5/3109 ,  H01F10/131 ,  H01F10/138 ,  H01F10/265 ,  Y10S428/90

摘要： An object of the present invention is to provide a recording head having a magnetic pole simultaneously possessing a high saturation magnetic flux density, a high permeability and a high electric resistivity, and the magnetic pole of the recording head is a polycrystalline film comprising Fe whose content is not less than 57.5 atomic % and not more than 94.5 atomic %; one or more kinds of elements selected from the element group of Al, B, Ga, Si, Ge, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and Rh, whose whole content is not less than 1 atomic % and not more than 15 atomic %; N whose content is not less than 0.5 atomic % and not more than 10 atomic %; and O whose content is not less than 1.5 atomic % and not more than 22.5 atomic %.

摘要翻译： 本发明的目的是提供一种具有同时具有高饱和磁通密度，高磁导率和高电阻率的磁极的记录头，记录头的磁极是包含Fe的多晶膜，其含量 不小于57.5原子％且不大于94.5原子％; 选自Al，B，Ga，Si，Ge，Y，Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W和Rh的元素组中的一种或多种元素，其全部含量不少于 1原子％以上15原子％以下。 N含量不小于0.5原子％且不大于10原子％; 其含量不小于1.5原子％且不大于22.5原子％。

公开(公告)号：US06614621B2

公开(公告)日：2003-09-02

申请号：US10005011

申请日：2001-12-04

申请人： Masahiro Kakehi ,  Hiroshi Maeda ,  Takashi Sekikawa

发明人： Masahiro Kakehi ,  Hiroshi Maeda ,  Takashi Sekikawa

IPC分类号： G11B5147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3166 ,  G11B5/3967 ,  G11B2005/3996

摘要： An upper auxiliary magnetic pole is formed in a space on a lower magnetic pole layer. A first insulating layer is then formed over the surface of the lower magnetic pole layer. The upper auxiliary magnetic pole is embedded within a swell formed on the surface of the first insulating layer. A second insulating layer is then formed over the surface of the first insulating layer. The second insulating layer has a property less abrasive than the first insulating layer. The second insulating layer is subjected to grinding over a wider area just after the swell has completely been removed. The abrasion can be suppressed at the thin film magnetic head in which the swell has been removed. The first insulating layer of a predetermined thickness reliably remains in each of the thin film magnetic heads on the wafer. An accurate adjustment of the thickness of the first insulating layer leads to a reliable establishment of a predetermined thickness in the upper auxiliary magnetic pole with less error.

摘要翻译： 上辅助磁极形成在下磁极层的空间中。 然后在下磁极层的表面上形成第一绝缘层。 上辅助磁极嵌入在第一绝缘层的表面上形成的隆起中。 然后在第一绝缘层的表面上形成第二绝缘层。 第二绝缘层具有比第一绝缘层更少磨损的性质。 第二绝缘层在溶胀完全去除之后在更宽的区域上进行研磨。 在去除了膨胀的薄膜磁头上可以抑制磨损。 预定厚度的第一绝缘层可靠地保留在晶片上的每个薄膜磁头中。 精确调整第一绝缘层的厚度导致在上辅助磁极中以较小误差可靠地建立预定厚度。

公开(公告)号：US6087026A

公开(公告)日：2000-07-11

申请号：US957188

申请日：1997-10-24

申请人： Masahiro Kakehi ,  Yuji Uehara

发明人： Masahiro Kakehi ,  Yuji Uehara

IPC分类号： G11B5/39 ,  H01F10/08 ,  H01F10/30 ,  H01F10/32 ,  H01L43/08 ,  G11B5/66

CPC分类号： G11B5/3932 ,  Y10S428/90 ,  Y10T428/1121

摘要： A MR head employs a biasing soft magnetic film of a FeXN-based alloy which undergoes no change in the direction of its axis of easy magnetization even when subject to heat treatment. The MR head has an anisotropic magnetic field size of 10 Oe or greater, and electrical resistance p of 70 .mu..OMEGA.cm or greater, and a saturation flux density Bs of 1 T or greater. The direction of the axis of easy magnetization of the biasing soft magnetic film is oriented perpendicular to the direction of sense current, and the direction of the axis of easy magnetization of the MR film is oriented parallel to the sense current direction.

摘要翻译： MR头采用FeXN基合金的偏压软磁膜，即使在进行热处理时也不会发生易磁化轴方向的变化。 MR磁头的各向异性磁场尺寸为10Oe以上，电阻p为70μΩ/ cm以上，饱和磁通密度Bs为1T以上。 偏置软磁膜的容易磁化轴的方向与感应电流的方向垂直，MR膜的易磁化轴方向平行于感应电流方向。

公开(公告)号：US07219415B2

公开(公告)日：2007-05-22

申请号：US10631624

申请日：2003-07-31

申请人： Masahiro Kakehi

发明人： Masahiro Kakehi

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/3163 ,  G11B5/3116 ,  G11B5/3967 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49041 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49156

摘要： The method of manufacturing a thin film magnetic head is capable of precisely forming a core section with preventing the variation of the write-core head caused by ion milling for removing an electric conductive film and capable of improving yield of products. The method of manufacturing a thin film magnetic head, in which a core section having prescribed write-core width is formed by applying ion milling to an upper magnetic pole and a lower magnetic pole, comprises the steps of examining the write-core width of the core section; covering a surface of the core section with a protection film except an electric conductive film for preventing electro static charge of a wafer; and removing the exposed electric conductive film by ion milling.

摘要翻译： 制造薄膜磁头的方法能够精确地形成芯部，防止由离子研磨引起的写入磁芯头的变化，以去除导电膜并且能够提高产品的产量。 通过向上磁极和下磁极施加离子铣削而形成具有规定的写入芯宽度的芯部的薄膜磁头的制造方法，包括以下步骤：检查 核心部分; 用除了用于防止晶片的静电荷的导电膜之外的保护膜覆盖芯部的表面; 并通过离子研磨去除暴露的导电膜。

公开(公告)号：US07575901B2

公开(公告)日：2009-08-18

申请号：US10798339

申请日：2004-03-12

申请人： Masahiro Kakehi ,  Yoshihiro Usuda ,  Yukiko Tabira ,  Shinichi Sugimoto

发明人： Masahiro Kakehi ,  Yoshihiro Usuda ,  Yukiko Tabira ,  Shinichi Sugimoto

IPC分类号： C12P19/38

CPC分类号： C12N9/16 ,  C12P19/30 ,  C12P19/32

摘要： Nucleoside 5′-phosphate ester is produced by culturing a bacterium belonging to the genus Escherichia having an ability to produce nucleoside 5′-phosphate ester, in which ushA gene and aphA gene do not function normally, in a medium to produce and accumulate nucleoside 5′-phosphate ester in the medium, and collecting the nucleoside 5′-phosphate ester from the medium.

公开(公告)号：US20080100960A1

公开(公告)日：2008-05-01

申请号：US11731558

申请日：2007-03-30

申请人： Masahiro Kakehi ,  Ryuei Ono

发明人： Masahiro Kakehi ,  Ryuei Ono

IPC分类号： G11B5/127

CPC分类号： G11B5/3166 ,  G11B5/17 ,  G11B5/3133 ,  G11B5/3173

摘要： The present invention provides an insulation characteristic measuring method of measuring electrical insulation of magnetic head elements formed on a wafer. Each of the magnetic head elements includes an upper magnetic pole layer, a lower magnetic pole layer, insulation layers disposed between the upper and lower magnetic pole layers, and a coil layer formed of a conductive material and disposed between the insulation layers. In at least one of the magnetic head elements, the upper and lower magnetic pole layers are electrically insulated from each other, and the upper and lower magnetic pole layers and the coil layer of the element are respectively connected to terminals of electrodes for measuring insulation. The insulation characteristic of the magnetic head elements is measured by the electrodes. It is therefore possible to measure whether insulation is ensured between layers of the magnetic head elements, which need to be insulated from each other.

摘要翻译： 本发明提供一种测量在晶片上形成的磁头元件的电绝缘性的绝缘特性测量方法。 每个磁头元件包括上磁极层，下磁极层，设置在上磁极层和下磁极层之间的绝缘层，以及由导电材料形成并设置在绝缘层之间的线圈层。 在至少一个磁头元件中，上磁极层和下磁极层彼此电绝缘，并且元件的上下磁极层和线圈层分别连接到用于测量绝缘的电极的端子。 磁头元件的绝缘特性由电极测量。 因此，可以测量需要彼此绝缘的磁头元件的层之间的绝缘是否被确保。