公开(公告)号：US6055139A

公开(公告)日：2000-04-25

申请号：US762207

申请日：1996-12-09

申请人： Yoshinori Ohtsuka ,  Yoshifumi Mizoshita ,  Takao Koshikawa ,  Hiroshi Maeda

发明人： Yoshinori Ohtsuka ,  Yoshifumi Mizoshita ,  Takao Koshikawa ,  Hiroshi Maeda

IPC分类号： G11B5/596 ,  G11B5/66 ,  G11B5/82 ,  G11B5/855 ,  G11B5/74 ,  G11B23/00

CPC分类号： B82Y10/00 ,  G11B5/59633 ,  G11B5/59688 ,  G11B5/66 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855

摘要： A magnetic recording medium having magnetic patterns into which servo information are written and a magnetic recording layer into which data are written comprises a nonmagnetic substrate, a magnetic recording layer formed on the substrate, and a hard magnetic layer contacted the magnetic recording layer within servo signal recording regions on the substrate and constituting servo patterns of film thicknesses of which are varied in the track length direction. Thereby, more precise reading of the servo signals by the magnetic head is assured and a surface of the magnetic recording medium can be flatted.

摘要翻译： 具有写入伺服信息的磁图案的磁记录介质和写入数据的磁记录层包括非磁性基板，形成在基板上的磁记录层，以及与伺服信号中的磁记录层接触的硬磁层 记录在基板上的区域，并且构成其厚度在光纤长度方向上变化的伺服图案。 因此，确保了通过磁头更精确地读取伺服信号，并且可以使磁记录介质的表面平坦化。

公开(公告)号：US06324032B1

公开(公告)日：2001-11-27

申请号：US09307458

申请日：1999-05-07

申请人： Yoshinori Ohtsuka ,  Yoshifumi Mizoshita ,  Takao Koshikawa ,  Hiroshi Maeda

发明人： Yoshinori Ohtsuka ,  Yoshifumi Mizoshita ,  Takao Koshikawa ,  Hiroshi Maeda

IPC分类号： G11B574

CPC分类号： B82Y10/00 ,  G11B5/59633 ,  G11B5/59688 ,  G11B5/66 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855

摘要： A magnetic recording medium having magnetic patterns into which servo information are written and a magnetic recording layer into which data are written comprises a nonmagnetic substrate, a magnetic recording layer formed on the substrate, and a hard magnetic layer contacting the magnetic recording layer within servo signal recording regions on the substrate and constituting servo patterns of film thicknesses of which are varied in the track length direction. Thereby, more precise reading of the servo signals by the magnetic head is assured and a surface of the magnetic recording medium can be flattend.

摘要翻译： 具有写入伺服信息的磁图案的磁记录介质和写入数据的磁记录层包括非磁性基板，形成在基板上的磁记录层和在伺服信号内与磁记录层接触的硬磁层 记录在基板上的区域，并且构成其厚度在光纤长度方向上变化的伺服图案。 因此，确保了通过磁头更精确地读取伺服信号，并且磁记录介质的表面可以变平。

公开(公告)号：US5717630A

公开(公告)日：1998-02-10

申请号：US630993

申请日：1996-04-12

申请人： Takao Koshikawa ,  Yukinori Ikegawa ,  Hiroshi Maeda ,  Yoshinori Ohtsuka ,  Takahiro Imamura ,  Yoshifumi Mizoshita

发明人： Takao Koshikawa ,  Yukinori Ikegawa ,  Hiroshi Maeda ,  Yoshinori Ohtsuka ,  Takahiro Imamura ,  Yoshifumi Mizoshita

IPC分类号： G01R33/09 ,  G01Q60/10 ,  G01Q80/00 ,  G01R33/07 ,  G01R33/10 ,  G11B5/00 ,  G11B5/127 ,  G11B5/33 ,  G11B5/35 ,  G11B5/37 ,  G11B5/39 ,  G11B5/48 ,  G11B5/54 ,  G11B9/00 ,  H01L43/08

CPC分类号： G11B5/00 ,  G11B5/1278 ,  G11B5/332 ,  G11B5/3903 ,  G11B5/3925 ,  G11B5/3967 ,  G11B5/398 ,  G11B5/48 ,  G11B5/54 ,  B82Y10/00 ,  G11B9/1436 ,  Y10S977/865

摘要： A magnetic memory device comprises: a vertically magnetic recording medium; a probe formed of an electrically conductive as well as soft-magnetic material, a pointed end of the probe faces the magnetically recording medium across a gap; a magnetic flux detecting element for detecting a magnetic flux caught by the probe, where the magnetic flux is from a data recorded on the magnetically recording medium; a vertical controller for keeping the gap constant by the use of a tunnel current flowing via said gap into the probe while a voltage is applied across the gap; and a scan mechanism for scanning the probe along the magnetically recording medium. The magnetic memory device may further comprises an exciting coil for magnetizing the probe so as to write a data in the magnetically recording medium. The probe may be recessed from the scanning position when the probe is not in operation.

摘要翻译： 磁存储器件包括：垂直磁记录介质; 由导电以及软磁材料形成的探针，探针的尖端通过间隙面向磁记录介质; 磁通检测元件，用于检测由所述探针捕获的磁通量，其中所述磁通量来自记录在所述磁记录介质上的数据; 垂直控制器，用于通过在跨过间隙施加电压的情况下通过使用经由所述间隙流入探针的隧道电流来保持间隙恒定; 以及用于沿着磁记录介质扫描探针的扫描机构。 磁存储器件还可以包括用于磁化探针的激励线圈，以便将数据写入磁记录介质。 当探头不工作时，探头可能会从扫描位置凹陷。

公开(公告)号：US5995339A

公开(公告)日：1999-11-30

申请号：US791015

申请日：1997-01-27

申请人： Takao Koshikawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Junzo Toda ,  Yoshifumi Mizoshita

发明人： Takao Koshikawa ,  Yoshinori Ohtsuka ,  Yuji Uehara ,  Junzo Toda ,  Yoshifumi Mizoshita

IPC分类号： G11B5/39

CPC分类号： G11B5/3912 ,  G11B5/3903 ,  G11B5/3919 ,  G11B5/3925 ,  G11B5/3967

摘要： A magnetoresistive head includes a magnetoresistive element set back from the front end face of the head confronting a record medium for converting changes in a signal magnetic field leaking out from the record track of the record medium into changes in resistance. The magnetoresistive element is connected to a pair of terminals and a sense region is defined between both the terminals. The magnetoresistive element is magnetically coupled to a front flux guide, one end of which is exposed in the front end face of the head, at the other end of the same. The front flux guide is virtually in the form of a rectangle elongated in the direction of the width of the record track of the record medium so as to exceed the sense region of the magnetoresistive element.

摘要翻译： 磁阻头包括从面对记录介质的头的前端面设置的磁阻元件，用于将从记录介质的记录轨道泄漏的信号磁场的变化转换成电阻变化。 磁阻元件连接到一对端子，并且两个端子之间限定感测区域。 磁阻元件磁耦合到前磁通引导件，其前端在头部的前端面暴露在前磁通引导件的另一端处。 前通量引导件实际上是在记录介质的记录轨道的宽度方向上延伸的矩形的形式，以便超过磁阻元件的感测区域。

公开(公告)号：US5859753A

公开(公告)日：1999-01-12

申请号：US766940

申请日：1996-12-16

申请人： Yoshinori Ohtsuka ,  Yoshifumi Mizoshita ,  Takao Koshikawa

发明人： Yoshinori Ohtsuka ,  Yoshifumi Mizoshita ,  Takao Koshikawa

IPC分类号： G11B5/09 ,  G11B5/39 ,  G11B5/40 ,  G11B19/04 ,  G11C11/16

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3954 ,  G11B5/40 ,  G11C11/16 ,  G11B19/04 ,  G11B2005/3996 ,  G11B5/09

摘要： A spin valve magnetoresistive head comprises a first spin valve device having a first magnetization free layer and a first magnetization pinning layer via a first non-magnetic intermediate layer, a second spin valve device having a second magnetization free layer and a second magnetization pinning layer via a second non-magnetic intermediate layer, whereby the first and second magnetization pinning layers are magnetized in anti-parallel to each other and the first and second magnetization free layers are magnetized rotatably based on an external magnetic field.

摘要翻译： 自旋阀磁阻头包括经由第一非磁性中间层具有第一磁化自由层和第一磁化闭合层的第一自旋阀装置，具有第二磁化自由层和第二磁化闭合层通过的第二自旋阀装置 第二非磁性中间层，由此第一和第二磁化钉扎层被彼此反平行地磁化，并且第一和第二磁化自由层基于外部磁场被可旋转地磁化。

公开(公告)号：US5771141A

公开(公告)日：1998-06-23

申请号：US766511

申请日：1996-12-13

申请人： Yoshinori Ohtsuka ,  Takao Koshikawa ,  Yoshifumi Mizoshita ,  Yuji Uehara ,  Eiichi Kanda ,  Ken-ichi Aoshima ,  Hitoshi Kanai ,  Junichi Kane

发明人： Yoshinori Ohtsuka ,  Takao Koshikawa ,  Yoshifumi Mizoshita ,  Yuji Uehara ,  Eiichi Kanda ,  Ken-ichi Aoshima ,  Hitoshi Kanai ,  Junichi Kane

IPC分类号： G11B5/39

CPC分类号： G11B5/39

摘要： A magnetoresistive head comprises a magnetoresistive layer having an axis of easy magnetization in the direction parallel to an air bearing surface, a first electrode formed on the magnetoresistive layer on the air bearing surface side and an oblique side portion with respect to the air bearing surface, and a second electrode formed to be separated at a distance from the first electrode and having a side portion substantially parallel to the oblique side portion of the first electrode on the magnetoresistive layer.

摘要翻译： 磁阻头包括在平行于空气轴承表面的方向上具有容易磁化的轴的磁阻层，形成在空气轴承表面侧的磁阻层上的第一电极和相对于空气轴承表面的倾斜侧部， 以及第二电极，其形成为与所述第一电极隔开一定距离，并且具有与所述磁阻层上的所述第一电极的所述倾斜侧部大致平行的侧部。

公开(公告)号：US6083410A

公开(公告)日：2000-07-04

申请号：US953186

申请日：1997-10-17

申请人： Yukinori Ikegawa ,  Takao Koshikawa ,  Yoshinori Ohtsuka

发明人： Yukinori Ikegawa ,  Takao Koshikawa ,  Yoshinori Ohtsuka

IPC分类号： G11B5/23 ,  G11B5/31 ,  B44C1/22

CPC分类号： G11B5/3183 ,  G11B5/3116 ,  G11B5/232 ,  G11B5/3163

摘要： A plan or vertical type thin film magnetic head is produced by a process comprising the steps of: forming a gap separator layer of a non-magnetic material on the surface of a substrate, while the forming process is not limited to plating; forming a mask layer on the gap layer; patterning the mask layer to form a shield; etching the gap layer, while the shield functions as a mask, thereby forming a gap wall having a width narrower than that of the shield independent of the resolution degree of the resist; forming a magnetic pole layer of a soft magnetic material on the surface of the substrate by exposing the resist at a time, thereby the formed magnetic pole layer being separated by the gap wall; and, utilizing the gap wall as a magnetic pole gap of the magnetic pole layer.

摘要翻译： 通过包括以下步骤的方法制造平面或垂直型薄膜磁头：在基板的表面上形成非磁性材料的间隙隔离层，而成形过程不限于电镀; 在间隙层上形成掩模层; 图案化掩模层以形成屏蔽; 蚀刻间隙层，而屏蔽件用作掩模，从而形成宽度窄于屏蔽件的宽度的间隙壁，而与抗蚀剂的分辨度无关; 通过一次曝光抗蚀剂，在基板的表面上形成软磁性材料的磁极层，由此形成的磁极层被间隙壁分离; 并且利用间隙壁作为磁极层的磁极间隙。

公开(公告)号：US06614620B2

公开(公告)日：2003-09-02

申请号：US09778007

申请日：2001-02-06

申请人： Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Hideo Niwa ,  Yukinori Ikegawa ,  Yoshinori Ohtsuka ,  Hiroshi Maeda ,  Takashi Sekikawa ,  Hiroki Fujimoto

发明人： Ikuya Tagawa ,  Tomoko Kutsuzawa ,  Hideo Niwa ,  Yukinori Ikegawa ,  Yoshinori Ohtsuka ,  Hiroshi Maeda ,  Takashi Sekikawa ,  Hiroki Fujimoto

IPC分类号： G11B5147

CPC分类号： G11B5/313 ,  G11B5/3116 ,  G11B5/3163 ,  Y10S977/934 ,  Y10S977/935

摘要： A thin film magnetic head includes an upper magnetic pole maintaining a constant thickness in a range determined by the so-called gap depth. A thinner film portion is defined in the upper magnetic pole in a range rearward of the range determined by the gap depth. The thinner film portion has a reduced thickness smaller than the constant thickness. The upper magnetic pole starts to enlarge the core width in the lateral direction at the rear end of the region determined by the so-called neck height. The neck height smaller than the gap depth serves to establish a reduction in the thickness of the upper magnetic pole after the upper magnetic pole gets larger in the lateral direction. A magnetic saturation can reliably be prevented at the thinner film portion in the upper magnetic pole. The front end of the upper magnetic pole is allowed to receive a larger quantity of a magnetic flux. It is possible to reliably enhance a magnetic field for recordation in the thin film magnetic head.

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：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.