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1. 发明授权

US06295175B1 Apparatus for recognizing spin valve head failure due to pin layer magnetic field offset 失效
标题翻译：用于识别由于针层磁场偏移引起的自旋阀头故障的装置
公开(公告)号：US06295175B1
公开(公告)日：2001-09-25
申请号：US09218494
申请日：1998-12-22
申请人： Isamu Tomita , Takao Koshikawa , Toshinori Hoshino , Tadashi Nakamura , Hitoshi Kanai , Hiroaki Ueno
发明人： Isamu Tomita , Takao Koshikawa , Toshinori Hoshino , Tadashi Nakamura , Hitoshi Kanai , Hiroaki Ueno
IPC分类号： G11B2736
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/00 , G11B5/012 , G11B5/3903 , G11B5/3967 , G11B5/40 , G11B5/455 , G11B5/465 , G11B5/54 , G11B33/14 , G11B2005/0008 , G11B2005/0018 , G11B2005/3996
摘要： When a pin layer magnetic field offset judgment unit judges that a magnetic field in a pin layer of a spin valve head through which a sense current flows in the interference direction has been deviated from a normal direction, a recovery processing unit allows a recovery from the abnormality arising from the magnetic field offset. For example, the direction of the sense current is switched from the interference direction to the assist direction, and the sense current larger than that upon the ordinary reading action is allowed to flow so that the temperature of an antiferromagnetic layer exceeds the blocking temperature, whereby the direction of the magnetic field in the pin layer is modified to the normal direction by the action of a magnetic field generated from the sense current. After the modification, the sense current is returned to have its ordinary value in the interference direction.
摘要翻译：当针层磁场偏移判断单元判断出感测电流沿着干涉方向流动的自旋阀头的针层中的磁场已经从正常方向偏离时，恢复处理单元允许从由磁场偏移引起的异常。例如，感测电流的方向从干涉方向切换到辅助方向，并且允许大于普通读取动作的感测电流流动，使得反铁磁层的温度超过阻塞温度，由此通过由感应电流产生的磁场的作用，将销层中的磁场的方向修正为法线方向。修改后，检测电流返回到干涉方向上的普通值。

2. 发明授权

US5777827A Horizontal type magneto-resistive head using flux guide 失效
标题翻译：水平型磁阻头使用磁通导向
公开(公告)号：US5777827A
公开(公告)日：1998-07-07
申请号：US709270
申请日：1996-09-06
申请人： Yoshifumi Mizoshita , Takao Koshikawa , Hitoshi Kanai , Junichi Kane , Yoshinori Otsuka , Yukinori Ikegawa
发明人： Yoshifumi Mizoshita , Takao Koshikawa , Hitoshi Kanai , Junichi Kane , Yoshinori Otsuka , Yukinori Ikegawa
IPC分类号： G11B5/02 , G11B5/31 , G11B5/39 , G11B19/04 , G11B5/33
CPC分类号： G11B5/3916 , G11B19/04 , G11B5/02 , G11B5/3183 , G11B5/3903 , G11B5/3925 , G11B5/3967
摘要： A magneto-resistive (MR) head has an MR layer in a space formed by shield layers by providing a distance enough to protect magnetic flux, flowing through the MR layer from a recording medium through a gap formed by the shield layers, from leaking out to the shield layers. A flux guide is provided between the MR layer and the gap, and has an end magnetically connected to the MR, extending over an effective area of the MR head, and another end having a width a little narrower than a width of track of the recording medium. A side of the MR layer, opposite to the side connected with the flux guide layer is placed in a narrow space formed at a corner of the space. Magnetic flux leaked from the gap due to a sense current flowing through the MR layer is eliminated by making a current flow through a recording coil layer or through an electrically conductive layer placed in the space.
摘要翻译：磁阻（MR）头在由屏蔽层形成的空间中具有MR层，通过提供足够的距离来保护磁通量，通过由屏蔽层形成的间隙从记录介质流过MR层，从而泄漏到屏蔽层。磁通引导件设置在MR层和间隙之间，并且具有磁性地连接到MR的端部，延伸在MR磁头的有效区域上，另一端的宽度比记录的轨道的宽度稍窄中。 MR层的与与磁通引导层连接的一侧相对的一侧被放置在形成在该空间的角部的狭窄空间中。通过使流过记录线圈层的电流或通过放置在该空间中的导电层而消除由于流过MR层的感测电流而从间隙泄漏的磁通。

3. 发明授权

US5771141A Magnetoresistive head and magnetic recording/reproducing apparatus 失效
标题翻译：磁阻磁头和磁记录/重放装置
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。

4. 发明授权

US5583726A Magneto-resistive head using flux guide 失效
标题翻译：磁阻头使用助焊剂
公开(公告)号：US5583726A
公开(公告)日：1996-12-10
申请号：US435379
申请日：1995-05-05
申请人： Yoshifumi Mizoshita , Takao Koshikawa , Hitoshi Kanai , Junichi Kane , Yoshinori Otsuka , Yukinori Ikegawa
发明人： Yoshifumi Mizoshita , Takao Koshikawa , Hitoshi Kanai , Junichi Kane , Yoshinori Otsuka , Yukinori Ikegawa
IPC分类号： G11B5/02 , G11B5/31 , G11B5/39 , G11B19/04 , G11B5/33
CPC分类号： G11B5/3916 , G11B19/04 , G11B5/02 , G11B5/3183 , G11B5/3903 , G11B5/3925 , G11B5/3967
摘要： A magneto-resistive (MR) head has an MR layer in a space formed by shield layers by providing a distance enough to protect magnetic flux, flowing through the MR layer from a recording medium through a gap formed by the shield layers, from leaking out to the shield layers. A flux guide is provided between the MR layer and the gap and has an end magnetically connected to the MR extending over an effective area of the MR head, and another end having a width a little narrower than a width of track of the recording medium. A side of the MR layer, opposite to the side connected with the flux guide layer is placed in a narrow space formed at a corner of the space. Magnetic flux leaked from the gap due to a sense current flowing through the MR layer is eliminated by making a current flow through a recording coil layer or through an electrically conductive layer placed in the space.
摘要翻译：磁阻（MR）头在由屏蔽层形成的空间中具有MR层，通过提供足够的距离来保护磁通量，通过由屏蔽层形成的间隙从记录介质流过MR层，从而泄漏到屏蔽层。磁通引导件设置在MR层和间隙之间，并且具有与在MR磁头的有效区域上延伸的MR磁性连接的端部，另一端具有比记录介质的磁道宽度稍窄的宽度。 MR层的与与磁通引导层连接的一侧相对的一侧被放置在形成在该空间的角部的狭窄空间中。通过使流过记录线圈层的电流或通过放置在该空间中的导电层而消除由于流过MR层的感测电流而从间隙泄漏的磁通。

5. 发明授权

US06199267B1 Method for the production of a magnetic head 失效
标题翻译：制造磁头的方法
公开(公告)号：US06199267B1
公开(公告)日：2001-03-13
申请号：US09282543
申请日：1999-03-31
申请人： Takao Koshikawa , Atsuhiko Nagai
发明人： Takao Koshikawa , Atsuhiko Nagai
IPC分类号： G11B5187
CPC分类号： G11B5/3967 , G11B5/1871 , G11B5/3106 , G11B5/3109 , G11B5/3116 , G11B5/3163 , G11B5/40 , Y10T29/49041 , Y10T29/49044 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： A method for the production of a magnetic head, where first a lower magnetic pole is formed on a wafer. Next, a nonmagnetic write gap layer is formed on the lower magnetic pole. A coil is then formed to be sandwiched between nonmagnetic insulating layers on the nonmagnetic write gap layer. Finally, an upper magnetic pole, provided with a pole tip, is formed to contact the write gap layer on the nonmagnetic write gap layer. After formation, a focused ion beam is irradiated in the direction from a thickness of the pole tip to the lateral parts of the pole tip, the nonmagnetic write gap layer lying directly thereunder. The lower magnetic pole thereby trims the lateral parts of the pole tip while consequently decreasing the width of the pole tip. At the same time, depressed parts are formed in the lower magnetic pole in the areas extending outward from directly below the lateral parts of the pole tip. The width of the pole tip is then equalized and a width of the lower magnetic pole is sandwiched by the depressed parts. Lastly, a protective layer is formed, which is made of a nonmagnetic insulating material, fills in the depressed parts, and, at the same time, covers the upper magnetic pole and the lower magnetic pole.
摘要翻译：一种用于制造磁头的方法，其中首先在晶片上形成下磁极。接下来，在下磁极上形成非磁性写间隙层。然后形成线圈以夹在非磁性写间隙层上的非磁性绝缘层之间。最后，设置有极尖的上磁极与非磁性写间隙层上的写间隙层接触。形成后，在从极尖的厚度到极尖的侧面的方向照射聚焦离子束，非磁性写入间隙层位于其下方。因此，下磁极修剪极尖的侧部，从而减小极尖的宽度。同时，在从极尖的侧面的正下方向外延伸的区域中的下磁极中形成凹陷部。然后使极尖的宽度相等，并且下磁极的宽度被凹陷部分夹持。最后，形成由非磁性绝缘材料制成的保护层，填充凹陷部分，同时覆盖上磁极和下磁极。

6. 发明授权

US6055139A Magnetic recording medium and method of forming the same and magnetic disk drive 失效
标题翻译：磁记录介质及其形成方法及磁盘驱动器
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。

7. 发明授权

US5793560A Storage device having vibratory head 失效
标题翻译：具有振动头的存储装置
公开(公告)号：US5793560A
公开(公告)日：1998-08-11
申请号：US358402
申请日：1994-12-19
申请人： Yoshifumi Mizoshita , Hiroshi Maeda , Takao Koshikawa , Takayuki Yamamoto
发明人： Yoshifumi Mizoshita , Hiroshi Maeda , Takao Koshikawa , Takayuki Yamamoto
IPC分类号： G11B5/008 , G11B5/012 , G11B5/48 , G11B5/53 , G11B5/54 , G11B5/55 , G11B25/04 , H02K7/14 , H02N1/00 , G11B21/02
CPC分类号： G11B5/5521 , G11B25/04 , G11B5/00804 , G11B5/012 , G11B5/488 , G11B5/53 , G11B5/54 , G11B5/55 , G11B5/553 , H02K7/14 , H02N1/004 , H02N1/008 , H02K99/00
摘要： A storage device includes a substrate, a magnetic storage medium provided on the substrate, information being magnetically stored in the magnetic storage medium, a head unit, and a reciprocating mechanism provided on the substrate, the reciprocating mechanism causing the head unit to reciprocate in a plane parallel to a surface of the magnetic storage medium, wherein, while the head unit is being moved by the reciprocating mechanism, information is recorded in or reproduced from the magnetic storage medium via the head unit.
摘要翻译：存储装置包括基板，设置在基板上的磁存储介质，磁存储在磁存储介质中的信息，磁头单元和设置在基板上的往复机构，所述往复机构使磁头单元在平行于磁存储介质的表面的平面，其中，当头单元通过往复机构移动时，信息经由头单元记录在磁存储介质中或从磁存储介质再现。

8. 发明授权

US06324032B1 Magnetic recording medium having linear or curved tracking servo patterns formed obliquely relative to direction of tracks, and magnetic recording apparatus using the same 有权
标题翻译：具有相对于轨道方向倾斜地形成的线性或弯曲跟踪伺服图案的磁记录介质，以及使用其的磁记录装置
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。

9. 发明授权

US6083410A Thin film magnetic head and process for producing same 失效
标题翻译：薄膜磁头及其制造方法
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。

10. 发明授权

US5896243A Magneto-resistive effect type head with step or protrusion for reducing thermal asperity 失效
标题翻译：磁阻效应型头部具有台阶或突起，用于减少热凹凸
公开(公告)号：US5896243A
公开(公告)日：1999-04-20
申请号：US749103
申请日：1996-11-14
申请人： Takao Koshikawa , Yoshifumi Mizoshita
发明人： Takao Koshikawa , Yoshifumi Mizoshita
IPC分类号： G11B5/012 , G11B5/10 , G11B5/105 , G11B5/31 , G11B5/39 , G11B5/40 , G11B5/48 , G11B5/60 , G11B21/21 , G11B23/00 , G11B5/187 , G11B5/255
CPC分类号： G11B5/3906 , G11B5/10 , G11B5/102 , G11B5/105 , G11B5/39 , G11B5/3903 , G11B5/3967 , G11B5/40 , G11B5/4886 , G11B23/0007 , G11B5/012 , G11B5/3103 , G11B5/3106 , G11B5/6005
摘要： To suppress the thermal asperity in the magneto-resistive effect type head for carrying out the reproduction of signals from the recording medium by the element 2 while moving, in a flying or contact state with the recording medium, in a predetermined direction relative to the recording medium. A step 20 or a protrusion 21 which is closer to the recording medium than the element is provided on the air bearing surface of the head in an area on the leading side of the element with respect to the moving direction of the head.
摘要翻译：为了抑制磁阻效应型头中的热凹凸，用于在与记录介质的飞行或接触状态下相对于记录在预定方向上移动时执行从记录介质再现信号中。相对于头部的移动方向，在元件前侧的区域中，在头部的空气轴承表面上设置有比元件更靠近记录介质的台阶20或突起21。

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