公开(公告)号：US09190081B2

公开(公告)日：2015-11-17

申请号：US14194488

申请日：2014-02-28

Applicant: HGST Netherlands B.V.

Inventor： Jun Aoyama ,  Masato Shiimoto ,  Hiroyuki Katada ,  Kenichi Meguro ,  Nobuo Yoshida

IPC: G11B5/39

CPC classification number: G11B5/3912 ,  G11B5/398

Abstract: The embodiments disclosed generally relate to a read head sensor in a magnetic recording head. The read head sensor comprises side shields in addition to the upper and lower shields. The upper shield sensor is a multilayer structure with antiferromagnetic coupling. The side shield is a multilayer structure whereby a lower magnetic layer is separated from an upper magnetic layer. The upper magnetic layer is ferromagnetically coupled to a bottom layer of the upper shield. The bias direction of the read head sensor is antiparallel to the bottom layer of the upper shield.

Abstract translation: 所公开的实施例一般涉及磁记录头中的读头传感器。 读取头传感器除了上屏蔽和下屏蔽之外还包括侧屏蔽。 上屏蔽传感器是具有反铁磁耦合的多层结构。 侧面屏蔽是多层结构，其中下部磁性层与上部磁性层分离。 上磁性层被铁磁耦合到上屏蔽层的底层。 读头传感器的偏置方向与上屏蔽层的底层反平行。

公开(公告)号：US09542962B2

公开(公告)日：2017-01-10

申请号：US14604617

申请日：2015-01-23

Applicant: HGST Netherlands B.V.

Inventor： Hideki Mashima ,  Kenichi Meguro ,  Nobuo Yoshida ,  Toyoshige Noridomi ,  Tomohiro Saito ,  Kaori Suzuki

IPC: G11B5/39

CPC classification number: G11B5/3912 ,  G11B5/3932 ,  G11B5/3948 ,  G11B5/3958 ,  G11B5/397

Abstract: In one embodiment, a magnetic head includes a lower magnetic shield layer positioned at a media-facing surface, a pinned layer positioned above the lower magnetic shield layer at the media-facing surface, at least two MR elements extending in an element height direction by a first length positioned above the pinned layer and separated in a cross-track direction by an inner layer, bias layers extending in the element height direction by a second length positioned on outside edges of the MR elements and the pinned layer, and current paths positioned above and in electrical communication with the bias layers on either side of the inner layer, each current path extending in the element height direction away from the media-facing surface by a third length.

Abstract translation: 在一个实施例中，磁头包括位于面向介质表面的下磁屏蔽层，位于面向媒体的表面上的下磁屏蔽层上方的被钉扎层，至少两个沿单元高度方向延伸的MR元件， 所述第一长度位于所述被钉扎层上方并且在交叉轨道方向上由内层分离，所述偏置层在所述元件高度方向上延伸位于所述MR元件和被钉扎层的外边缘上的第二长度，并且所述电流路径被定位 并且与内层的任一侧上的偏置层电连通，每个电流路径在元件高度方向上延伸离开面向介质的表面第三长度。

公开(公告)号：US09099125B1

公开(公告)日：2015-08-04

申请号：US14513320

申请日：2014-10-14

Applicant: HGST Netherlands B.V.

Inventor： Masashi Hattori ,  Kenichi Meguro ,  Kouichi Nishioka ,  Takashi Wagatsuma ,  Nobuo Yoshida

IPC: G11B5/39 ,  G11B5/115 ,  G11B5/265

CPC classification number: G11B5/3912 ,  G11B5/265 ,  G11B5/3954 ,  G11B5/3958 ,  G11B5/3974 ,  G11B5/4886 ,  G11B5/5539

Abstract: A two-dimensional magnetic recording (TDMR) multi-sensor read head has three stacked sensors separated by magnetic shields. The lower sensor is the primary sensor that is always aligned with the target track. The middle sensor is spaced laterally from the lower sensor a distance substantially equal to the track pitch (TP). The upper sensor is aligned with the lower sensor. The spacing D between the lower and upper sensors is selected to be related to TP and a maximum skew angle, where the skew angle is the angle between a line orthogonal to the sensor and the data track that varies with radial position of the head. The read head is connected to circuitry that selects two of the three sensors to be the active sensors depending on the radial position of the head and thus the skew angle of the head.

Abstract translation: 二维磁记录（TDMR）多传感器读头具有由磁屏蔽分开的三个堆叠传感器。 下传感器是始终与目标轨道对齐的主传感器。 中间传感器与下传感器横向间隔大致等于轨道间距（TP）。 上传感器与下传感器对齐。 选择下传感器和上传感器之间的间距D与TP和最大斜角相关，其中歪斜角是与传感器正交的线与数据轨道之间的角度，该数据轨道随着头部的径向位置而变化。 读取头连接到根据头部的径向位置和因此头部的歪斜角度选择三个传感器中的两个作为有源传感器的电路。

公开(公告)号：US20160217813A1

公开(公告)日：2016-07-28

申请号：US14604617

申请日：2015-01-23

Applicant: HGST NETHERLANDS B.V.

Inventor： Hideki Mashima ,  Kenichi Meguro ,  Nobuo Yoshida ,  Toyoshige Noridomi ,  Tomohiro Saito ,  Kaori Suzuki

IPC: G11B5/39 ,  G11B5/127

CPC classification number: G11B5/3912 ,  G11B5/3932 ,  G11B5/3948 ,  G11B5/3958 ,  G11B5/397

Abstract: In one embodiment, a magnetic head includes a lower magnetic shield layer positioned at a media-facing surface, a pinned layer positioned above the lower magnetic shield layer at the media-facing surface, at least two MR elements extending in an element height direction by a first length positioned above the pinned layer and separated in a cross-track direction by an inner layer, bias layers extending in the element height direction by a second length positioned on outside edges of the MR elements and the pinned layer, and current paths positioned above and in electrical communication with the bias layers on either side of the inner layer, each current path extending in the element height direction away from the media-facing surface by a third length.

Abstract translation: 在一个实施例中，磁头包括位于面向介质表面的下磁屏蔽层，位于面向媒体的表面上的下磁屏蔽层上方的被钉扎层，至少两个沿单元高度方向延伸的MR元件， 所述第一长度位于所述被钉扎层上方并且在交叉轨道方向上由内层分离，所述偏置层在所述元件高度方向上延伸位于所述MR元件和被钉扎层的外边缘上的第二长度，并且所述电流路径被定位 并且与内层的任一侧上的偏置层电连通，每个电流路径在元件高度方向上延伸离开面向介质的表面第三长度。

公开(公告)号：US09269383B1

公开(公告)日：2016-02-23

申请号：US14604630

申请日：2015-01-23

Applicant: HGST Netherlands B.V.

Inventor： Masashi Hattori ,  Kouichi Nishioka ,  Takashi Wagatsuma ,  Nobuo Yoshida ,  Kenichi Meguro

IPC: G11B5/39

CPC classification number: G11B5/3932 ,  G11B5/3912 ,  G11B5/3958 ,  G11B5/397 ,  G11B5/398

Abstract: According to one embodiment, a magnetic head includes a lower magnetic shield positioned at a media facing surface of the head, a lower sensor positioned above the lower magnetic shield, the lower sensor including a lower free layer, a middle magnetic shield positioned above the lower sensor at the media facing surface of the head, and a back side antiferromagnetic (AFM) layer positioned behind the lower free layer in an element height direction, the back side AFM layer being configured to provide magnetic stabilization for the middle magnetic shield. In another embodiment, a method includes forming a lower sensor including a lower free layer, forming a back side AFM layer behind the lower free layer in an element height direction, and forming a middle magnetic shield above the lower sensor, wherein the back side AFM layer is configured to provide magnetic stabilization for the middle magnetic shield.

Abstract translation: 根据一个实施例，磁头包括位于头部与介质相对表面的下磁屏蔽，位于下磁屏蔽上方的下传感器，下传感器包括下自由层，位于下部磁屏蔽上方的中间磁屏蔽 传感器在头部的介质面向表面，以及位于元件高度方向上的下自由层之后的后侧反铁磁（AFM）层，后侧AFM层被配置为为中间磁屏蔽提供磁稳定。 在另一个实施例中，一种方法包括形成下部传感器，其包括下自由层，在元件高度方向上在下自由层之后形成背面AFM层，并在下传感器上方形成中间磁屏蔽，其中背侧AFM 层被配置为为中间磁屏蔽提供磁稳定。

公开(公告)号：US20140133052A1

公开(公告)日：2014-05-15

申请号：US13677196

申请日：2012-11-14

Applicant: HGST NETHERLANDS B.V.

Inventor： Kenichi Meguro ,  Keizo Kato ,  Susumu Okamura ,  Nobuo Yoshida

IPC: G11B5/127 ,  G11B5/39

CPC classification number: G11B5/398 ,  G11B5/3906 ,  G11B5/3909 ,  G11B5/3929 ,  Y10T428/1121

Abstract: A magnetic read head having a reduced read gap and a stable magnetic pinned layer structure. The sensor includes a seed layer that has a surface formed with an anisotropic texture. A magnetic pinned layer formed over the seed layer has a body centered cubic structure which causes the pinned layer structure to have a magnetic anisotropy with an easy axis oriented perpendicular to the air bearing surface when deposited over the textured seed layer. A magnetic free layer structure formed over the pinned layer structure and over a non-magnetic barrier layer has a face centered cubic structure which causes the magnetic free layer to have a magnetic anisotropy with an easy axis oriented parallel with the air bearing surface.

Abstract translation: 具有减小的读取间隙和稳定的磁性固定层结构的磁读头。 传感器包括具有形成有各向异性纹理的表面的种子层。 形成在种子层上方的磁性钉扎层具有体心立方结构，这使得被钉扎层结构具有磁性各向异性，当沉积在纹理种子层上时，易于轴定向成垂直于空气轴承表面。 形成在被钉扎层结构之上并且在非磁性阻挡层之上的无磁性层结构具有面心立方结构，其使得磁性自由层具有与空气轴承表面平行定向的容易轴的磁各向异性。