公开(公告)号：US08836059B2

公开(公告)日：2014-09-16

申请号：US13724662

申请日：2012-12-21

Applicant: HGST Netherlands B.V.

Inventor： Yongchul Ahn ,  Xiaozhong Dang ,  Yimin Hsu ,  Quang Le ,  Thomas Leong ,  Simon Liao ,  Guangli Liu ,  Aron Pentek

IPC: H01L29/82 ,  H01L21/02

CPC classification number: H01L21/02104 ,  B82Y10/00 ,  G11B5/3909 ,  G11B5/3932 ,  G11B2005/3996 ,  H01L29/82

Abstract: The present invention generally relates to a magnetic sensor in a read head having a hard or soft bias layer that is uniform in thickness within the sensor stack. The method of making such sensor is also disclosed. The free layer stripe height is first defined, followed by defining the track width, and lastly the pinned layer stripe height is defined. The pinned layer and the hard or soft bias layer are defined in the same process step. This approach eliminates a partial hard or soft bias layer and reduces potential instability issues.

Abstract translation: 本发明一般涉及读头中的磁传感器，其具有在传感器叠层内厚度均匀的硬或柔性偏压层。 还公开了制造这种传感器的方法。 首先定义自由层条纹高度，然后定义轨道宽度，最后定义固定层条纹高度。 钉扎层和硬或软偏置层在相同的工艺步骤中定义。 该方法消除了部分硬或软偏置层，并减少了潜在的不稳定性问题。

公开(公告)号：US20150029611A1

公开(公告)日：2015-01-29

申请号：US13950180

申请日：2013-07-24

Applicant: HGST Netherlands B.V.

Inventor： Venkata R. K. Gorantla ,  Wen-Chien D. Hsiao ,  Yimin Hsu ,  Terence T. L. Lam ,  Yansheng Luo ,  Aron Pentek ,  Katalin Pentek

IPC: G11B5/187 ,  G11B21/02

CPC classification number: G11B5/1278 ,  G11B5/3116

Abstract: In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated b a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an bearing surface of the bead tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.

Abstract translation: 在一个一般实施例中，磁头包括针极; 以及与所述针脚相邻形成的主极，所述最靠近所述头部的空气支承面的所述针脚的端部区域朝向所述主极部逐渐变细。 在另一个一般实施例中，磁头包括一个线圈极，它是由非磁性层分开的至少两个磁性层的叠层; 以及与针极相邻形成的主极。 最接近珠粒的支承面的针脚的端部区域朝向主极部逐渐变细。 针脚的端部区域的锥度的平均角度在约20度和约45度之间。 这样的头可以在数据存储系统中实现。

公开(公告)号：US08638530B1

公开(公告)日：2014-01-28

申请号：US13771486

申请日：2013-02-20

Applicant: HGST Netherlands B.V.

Inventor： Yimin Hsu ,  Stefan Maat ,  Arley Cleveland Marley ,  Alexander M. Zeltser

IPC: G11B5/39 ,  G11B5/11

CPC classification number: G11B5/3912 ,  B82Y10/00 ,  G11B2005/3996

Abstract: A current-perpendicular-to-the-plane magnetoresistive sensor structure includes at least an improved top shield structure and optionally also a similar bottom shield structure. The top shield structure includes an antiparallel structure (APS) of two ferromagnetic films and a nonmagnetic antiparallel coupling (APC) film between them. The APC film induces antiferromagnetic (AF) coupling between the two ferromagnetic films so that they have their respective magnetizations oriented antiparallel. An important aspect of the APS is that there is no antiferromagnetic layer adjacent the upper ferromagnetic film, so that the upper ferromagnetic film does not have its magnetization pinned by an antiferromagnetic layer. An electroplated shield layer is formed above the APS. A nonmagnetic decoupling layer is located between the APS and the electroplated shield layer to prevent domain wall movement in the electroplated shield from transferring to the ferromagnetic layers in the APS and thus possibly induce noise in the sensor.

Abstract translation: 电流 - 垂直于平面的磁阻传感器结构至少包括改进的顶部屏蔽结构和任选地也类似的底部屏蔽结构。 顶部屏蔽结构包括两个铁磁膜的反平行结构（APS）和它们之间的非磁性反平行耦合（APC）膜。 APC膜在两个铁磁膜之间引起反铁磁（AF）耦合，使得它们各自的磁化反平行取向。 APS的一个重要方面是在上铁磁膜附近没有反铁磁层，使得上铁磁膜不具有被反铁磁层固定的磁化。 在APS上方形成电镀屏蔽层。 非磁性解耦层位于APS和电镀屏蔽层之间，以防止电镀屏蔽层中的畴壁运动转移到APS中的铁磁层，从而可能导致传感器中的噪声。

公开(公告)号：US08947827B1

公开(公告)日：2015-02-03

申请号：US13950180

申请日：2013-07-24

Applicant: HGST Netherlands B.V.

Inventor： Venkata R. K. Gorantla ,  Wen-Chien D. Hsiao ,  Yimin Hsu ,  Terence T. L. Lam ,  Yansheng Luo ,  Aron Pentek ,  Katalin Pentek

IPC: G11B5/127

CPC classification number: G11B5/1278 ,  G11B5/3116

Abstract: In one general embodiment, a magnetic head includes a stitch pole; and a main pole formed adjacent the stitch pole, wherein an end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. In another general embodiment, a magnetic head includes a stitch pole being a laminate of at least two magnetic layers separated by a nonmagnetic layer; and a main pole formed adjacent the stitch pole. An end region of the stitch pole closest to an air bearing surface of the head tapers towards the main pole. An average angle of the taper of the end region of the stitch pole is between about 20 and about 45 degrees. Such head may be implemented in a data storage system.

Abstract translation: 在一个一般实施例中，磁头包括针极; 以及与所述针脚相邻形成的主极，所述最靠近所述头部的空气支承面的所述针脚的端部区域朝向所述主极部逐渐变细。 在另一个一般实施例中，磁头包括由非磁性层分开的至少两个磁性层的叠层的线圈极; 以及与针极相邻形成的主极。 最靠近头部的空气支承表面的针脚的端部区域朝着主极逐渐变细。 针脚的端部区域的锥度的平均角度在约20度和约45度之间。 这样的头可以在数据存储系统中实现。