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公开(公告)号：US10008224B2
公开(公告)日：2018-06-26
申请号：US15068476
申请日：2016-03-11
Applicant: HGST Netherlands B.V.
Inventor： Takahiro Ibusuki , Kouji Kataoka , Takashi Wagatsuma , Norihiro Okawa , Yukimasa Okada
CPC classification number: G11B5/3912 , G11B5/3163 , G11B5/3903 , G11B5/3909 , G11B2005/3996
Abstract: A magnetic read element having an additional magnetic layer, “a floating magnetic shield”, formed as a part of a capping structure of a magnetoresistive element. The capping structure is formed over the magnetic free layer and includes a magnetic layer that is located between first and second non-magnetic layers. The magnetic layer can advantageously be formed with a high magnetic permeability for increased signal amplitude and increased signal resolution. In addition, because the magnetic layer of the capping layer structure acts as a magnetic shield, it can reduce effective magnetic gap spacing for increased signal resolution.
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2.发明申请MAGNETIC SENSOR HAVING OPTIMAL FREE LAYER BACK EDGE SHAPE AND EXTENDED PINNED LAYER 有权具有最佳自由层的磁传感器返回边缘形状和扩展的PINNED层公开(公告)号：US20150228297A1
公开(公告)日：2015-08-13
申请号：US14178179
申请日：2014-02-11
Applicant: HGST NETHERLANDS B.V.
Inventor： Takashi Wagatsuma , Yukimasa Okada , Katsumi Hoshino , Kouji Kataoka
CPC classification number: G11B5/3929 , G11B5/3909 , G11B5/398 , G11B5/6082 , G11B2005/3996
Abstract: A magnetic read sensor having an extended pinned layer and having a free layer structure with a back edge formed at an angle for optimizing sensor performance and pinned layer pinning. The magnetic free layer has a back edge that is formed at an angle of between 6 and 10 degrees relative to a plane parallel with the air bearing surface plane. The magnetic sensor can be formed by forming the free layer stripe height with an ion milling that is performed at an angle of 6 to 10 degrees relative to normal.
Abstract translation: 磁读取传感器，其具有延伸的被钉扎层并且具有自由层结构，其具有以一定角度形成的后边缘，以优化传感器性能和固定层钉扎。 磁性层具有相对于与空气支承面平面平行的平面以6度至10度的角度形成的后缘。 磁性传感器可以通过用相对于法线以6至10度的角度执行的离子铣削形成自由层条纹高度而形成。
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3.发明授权Error recovery based on applying current/voltage to a heating element of a magnetic head 有权基于向磁头的加热元件施加电流/电压的误差恢复公开(公告)号：US09019649B2
公开(公告)日：2015-04-28
申请号：US14260172
申请日：2014-04-23
Applicant: HGST Netherlands B.V.
Inventor： Yukimasa Okada , Katsumi Hoshino , Kouji Kataoka , Takashi Wagatsuma
Abstract: In one embodiment, a magnetic disk device includes a magnetic disk medium, at least one magnetic head having at least one of: a magnetic read element configured to read data from the magnetic disk medium and a magnetic write element configured to write data to the magnetic disk medium, and a heating element configured to generate heat upon application of a voltage/current thereto, wherein the heating element is positioned on, near, or within the magnetic head, a drive mechanism for passing the magnetic disk medium over the at least one magnetic head, and a controller electrically coupled to the at least one magnetic head for controlling operation of the at least one magnetic head, wherein the controller is configured to retract the at least one magnetic head from a flying state above the magnetic disk medium and apply the voltage/current to the heating element while the magnetic head is retracted.
Abstract translation: 在一个实施例中，磁盘装置包括磁盘介质，至少一个磁头，其具有以下至少一个：磁读取元件，被配置为从磁盘介质读取数据;磁写入元件，被配置为将数据写入磁 磁盘介质和被配置为在施加电压/电流时产生热量的加热元件，其中所述加热元件位于所述磁头的附近或内部，驱动机构，用于使所述磁盘介质通过所述至少一个 磁头以及与所述至少一个磁头电耦合以控制所述至少一个磁头的操作的控制器，其中所述控制器被配置为将所述至少一个磁头从所述磁盘介质上方的飞行状态缩回并应用 在磁头收回时到加热元件的电压/电流。
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公开(公告)号：US20170263273A1
公开(公告)日：2017-09-14
申请号：US15068476
申请日：2016-03-11
Applicant: HGST Netherlands B.V.
Inventor： Takahiro Ibusuki , Kouji Kataoka , Takashi Wagatsuma , Norihiro Okawa , Yukimasa Okada
IPC: G11B5/39
CPC classification number: G11B5/3912 , G11B5/3163 , G11B5/3903 , G11B5/3909 , G11B2005/3996
Abstract: A magnetic read element having an additional magnetic layer, “a floating magnetic shield”, formed as a part of a capping structure of a magnetoresistive element. The capping structure is formed over the magnetic free layer and includes a magnetic layer that is located between first and second non-magnetic layers. The magnetic layer can advantageously he formed with a high magnetic permeability for increased signal amplitude and increased signal resolution. In addition, because the magnetic layer of the capping layer structure acts as a magnetic shield, it can reduce effective magnetic gap spacing for increased signal resolution.
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Patent Agency Ranking
5.发明授权Magnetic sensor having optimal free layer back edge shape and extended pinned layer 有权磁传感器具有最佳的自由层后边缘形状和延伸的钉扎层公开(公告)号：US09099123B1
公开(公告)日：2015-08-04
申请号：US14178179
申请日：2014-02-11
Applicant: HGST Netherlands B.V.
Inventor： Takashi Wagatsuma , Yukimasa Okada , Katsumi Hoshino , Kouji Kataoka
IPC: G11B5/39
CPC classification number: G11B5/3929 , G11B5/3909 , G11B5/398 , G11B5/6082 , G11B2005/3996
Abstract: A magnetic read sensor having an extended pinned layer and having a free layer structure with a back edge formed at an angle for optimizing sensor performance and pinned layer pinning. The magnetic free layer has a back edge that is formed at an angle of between 6 and 10 degrees relative to a plane parallel with the air bearing surface plane. The magnetic sensor can be formed by forming the free layer stripe height with an ion milling that is performed at an angle of 6 to 10 degrees relative to normal.
Abstract translation: 磁读取传感器，其具有延伸的被钉扎层并且具有自由层结构，其具有以一定角度形成的后边缘，以优化传感器性能和固定层钉扎。 磁性层具有相对于与空气支承面平面平行的平面以6度至10度的角度形成的后缘。 磁性传感器可以通过用相对于法线以6至10度的角度执行的离子铣削形成自由层条纹高度而形成。
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6.发明授权Magnetic head having a soft magnetic layer formed behind a tunneling magnetoresistance (TMR) sensor in an element height direction 有权具有在元件高度方向上形成在隧道磁阻（TMR）传感器之后的软磁性层的磁头公开(公告)号：US08873203B2
公开(公告)日：2014-10-28
申请号：US13724529
申请日：2012-12-21
Applicant: HGST Netherlands B.V.
Inventor： Katsumi Hoshino , Kouji Kataoka , Takashi Wagatsuma , Yukimasa Okada
CPC classification number: G11B5/11 , G11B5/3912 , G11B5/398 , G11B19/20
Abstract: A magnetic head according to one embodiment includes a read sensor adapted for sensing an external magnetic field; an upper magnetic shield positioned above the read sensor along an air bearing surface (ABS) of the read sensor; a lower magnetic shield positioned below the read sensor along the ABS of the read sensor; a rear insulating layer positioned on a rear side of the read sensor, the rear side being on an opposite side of the read sensor as the ABS of the read sensor; and a soft magnetic layer positioned near the rear side of the read sensor opposite the ABS of the read sensor, wherein the rear insulating layer is positioned between the soft magnetic layer and the read sensor, and wherein the rear insulating layer is positioned between the soft magnetic layer and the lower magnetic shield.
Abstract translation: 根据一个实施例的磁头包括适于感测外部磁场的读取传感器; 位于读取传感器上方的读取传感器的空气支承表面（ABS）的上磁屏蔽; 沿着读取传感器的ABS位于读取传感器下方的下部磁屏蔽; 位于所述读取传感器的后侧的后部绝缘层，所述背面位于所述读取传感器的与所述读取传感器的ABS相反的一侧; 以及位于所述读取传感器的与所述读取传感器的ABS相对的后侧附近的软磁性层，其中所述后部绝缘层位于所述软磁性层和所述读取传感器之间，并且其中所述后部绝缘层位于所述软性 磁层和下磁屏蔽。
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7.发明申请ERROR RECOVERY BASED ON APPLYING CURRENT/VOLTAGE TO A HEATING ELEMENT OF A MAGNETIC HEAD 有权基于将电流/电压施加到磁头的加热元件的错误恢复公开(公告)号：US20140226237A1
公开(公告)日：2014-08-14
申请号：US14260172
申请日：2014-04-23
Applicant: HGST Netherlands B.V.
Inventor： Yukimasa Okada , Katsumi Hoshino , Kouji Kataoka , Takashi Wagatsuma
IPC: G11B20/18
Abstract: In one embodiment, a magnetic disk device includes a magnetic disk medium, at least one magnetic head having at least one of: a magnetic read element configured to read data from the magnetic disk medium and a magnetic write element configured to write data to the magnetic disk medium, and a heating element configured to generate heat upon application of a voltage/current thereto, wherein the heating element is positioned on, near, or within the magnetic head, a drive mechanism for passing the magnetic disk medium over the at least one magnetic head, and a controller electrically coupled to the at least one magnetic head for controlling operation of the at least one magnetic head, wherein the controller is configured to retract the at least one magnetic head from a flying state above the magnetic disk medium and apply the voltage/current to the heating element while the magnetic head is retracted.
Abstract translation: 在一个实施例中，磁盘装置包括磁盘介质，至少一个磁头，其具有以下至少一个：磁读取元件，被配置为从磁盘介质读取数据;磁写入元件，被配置为将数据写入磁 磁盘介质和被配置为在施加电压/电流时产生热量的加热元件，其中所述加热元件位于所述磁头的附近或内部，驱动机构，用于使所述磁盘介质通过所述至少一个 磁头以及与所述至少一个磁头电耦合以控制所述至少一个磁头的操作的控制器，其中所述控制器被配置为将所述至少一个磁头从所述磁盘介质上方的飞行状态缩回并应用 在磁头收回时到加热元件的电压/电流。
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8.发明授权Magnetic head having two domain control layers for stabilizing magnetization of the hard bias layer 有权具有用于稳定硬偏置层的磁化的两个域控制层的磁头公开(公告)号：US08976492B1
公开(公告)日：2015-03-10
申请号：US14066523
申请日：2013-10-29
Applicant: HGST Netherlands B.V.
Inventor： Kouji Kataoka , Takashi Wagatsuma , Katsumi Hoshino , Takahiro Ibusuki , Yukimasa Okada , Norihiro Ookawa
IPC: G11B5/127
CPC classification number: G11B5/3912 , G11B5/3909 , G11B2005/3996
Abstract: In one embodiment, a magnetic head includes a lower shield, a read element positioned above the lower shield at a media-facing surface of the magnetic head, the read element having a free layer, an upper shield positioned above the read element, a first domain control layer having a direction of magnetization in a predetermined direction, the first domain control layer being configured to control a direction of magnetization of the free layer toward the predetermined direction, and a second domain control layer configured to have a magnetization in a same direction as the direction of magnetization of the first domain control layer, the second domain control layer being positioned above the first domain control layer, wherein the first domain control layer is a hard magnetic layer, and wherein the second domain control layer is a soft magnetic layer.
Abstract translation: 在一个实施例中，磁头包括下屏蔽，位于磁头的面向介质表面的下屏蔽上方的读取元件，读取元件具有自由层，位于读取元件上方的上屏蔽件，第一 域控制层，其具有沿预定方向的磁化方向，所述第一域控制层被配置为控制所述自由层朝向所述预定方向的磁化方向;以及第二域控制层，被配置为具有相同方向的磁化 作为第一域控制层的磁化方向，第二域控制层位于第一区域控制层上方，其中第一域控制层是硬磁性层，并且其中第二域控制层是软磁层 。
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9.发明申请MAGNETIC HEAD HAVING A SOFT MAGNETIC LAYER FORMED BEHIND A TUNNELING MAGNETORESISTANCE (TMR) SENSOR IN AN ELEMENT HEIGHT DIRECTION 有权具有软磁性层的磁头，形成一个元件高度方向的隧道磁阻（TMR）传感器公开(公告)号：US20140177093A1
公开(公告)日：2014-06-26
申请号：US13724529
申请日：2012-12-21
Applicant: HGST NETHERLANDS B.V.
Inventor： Katsumi Hoshino , Kouji Kataoka , Takashi Wagatsuma , Yukimasa Okada
CPC classification number: G11B5/11 , G11B5/3912 , G11B5/398 , G11B19/20
Abstract: A magnetic head according to one embodiment includes a read sensor adapted for sensing an external magnetic field; an upper magnetic shield positioned above the read sensor along an air bearing surface (ABS) of the read sensor; a lower magnetic shield positioned below the read sensor along the ABS of the read sensor; a rear insulating layer positioned on a rear side of the read sensor, the rear side being on an opposite side of the read sensor as the ABS of the read sensor; and a soft magnetic layer positioned near the rear side of the read sensor opposite the ABS of the read sensor, wherein the rear insulating layer is positioned between the soft magnetic layer and the read sensor, and wherein the rear insulating layer is positioned between the soft magnetic layer and the lower magnetic shield.
Abstract translation: 根据一个实施例的磁头包括适于感测外部磁场的读取传感器; 位于读取传感器上方的读取传感器的空气支承表面（ABS）的上磁屏蔽; 沿着读取传感器的ABS位于读取传感器下方的下部磁屏蔽; 位于所述读取传感器的后侧的后部绝缘层，所述背面位于所述读取传感器的与所述读取传感器的ABS相反的一侧; 以及位于所述读取传感器的与所述读取传感器的ABS相对的后侧附近的软磁性层，其中所述后部绝缘层位于所述软磁性层和所述读取传感器之间，并且其中所述后部绝缘层位于所述软性 磁层和下磁屏蔽。
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