公开(公告)号：US08749926B1

公开(公告)日：2014-06-10

申请号：US13691525

申请日：2012-11-30

Applicant: HGST Netherlands B.V.

Inventor： Quang Le ,  Simon H. Liao ,  Guangli Liu ,  Stefan Maat ,  Xiaozhong Dang ,  David J. Seagle ,  Petrus A. Van Der Heijden

IPC: G11B5/39

CPC classification number: G11B5/11 ,  B82Y10/00 ,  G11B5/3909 ,  G11B21/18 ,  G11B2005/3996

Abstract: A magnetic scissor type magnetic read head having magnetic side shielding for reduced effective track width and having side biasing for improved stability. The read head includes first and magnetic side shields that each include first and second magnetic layers and an anti-parallel exchange coupling layer sandwiched there-between. The magnetic layers of the side shields are anti-parallel coupled with one another such that one of the magnetic layers has its magnetization oriented in a first direction parallel with the air bearing surface and the second magnetic layer has its magnetization oriented in a second direction that is opposite to the first direction and also parallel with the air bearing surface. These magnetizations of the first and second magnetic layers provide a bias field that stabilizes the magnetization of the free magnetic layers of the sensor stack to prevent flipping of the magnetizations of these layers.

Abstract translation: 一种磁剪刀式磁读头，具有磁性侧屏蔽，减少了有效的磁道宽度，并具有侧偏压以提高稳定性。 读头包括第一和第二磁屏蔽，每个磁屏蔽包括第一和第二磁性层以及夹在其间的反平行交换耦合层。 侧屏蔽的磁层彼此反平行耦合，使得磁层中的一个磁化层在与空气轴承表面平行的第一方向上定向，并且第二磁性层的磁化方向在第二方向上定向， 与第一方向相反并且还与空气轴承表面平行。 第一和第二磁性层的这些磁化提供了一个偏置磁场，其稳定传感器堆叠的自由磁层的磁化，以防止这些层的磁化的翻转。

公开(公告)号：US09053721B1

公开(公告)日：2015-06-09

申请号：US14292760

申请日：2014-05-30

Applicant: HGST Netherlands B.V.

Inventor： Yongchul Ahn ,  David P. Druist ,  Zheng Gao ,  Ying Hong ,  Yunhe Huang ,  Quang Le ,  Thomas L. Leong ,  Guangli Liu ,  Xiaoyong Liu ,  David J. Seagle

IPC: G11B5/39 ,  G11B5/33 ,  G11B5/127

CPC classification number: G11B5/398 ,  G11B5/3163 ,  G11B5/3909 ,  G11B5/3912 ,  G11B2005/3996

Abstract: A magnetic read sensor having a magnetic seed layer, a pinned layer structure formed over the magnetic seed layer, a non-magnetic barrier or spacer layer formed over the pinned layer structure and a magnetic free layer structure formed over the non-magnetic barrier or spacer layer. The pinned layer has a stripe height (measured from the media facing surface) that is greater than a stripe height of the magnetic free layer structure. In addition, the magnetic seed layer structure has a stripe height (also measured from the media facing surface) that is greater than the stripe height of the magnetic pinned layer structure and the magnetic free layer structure. The stripe height of the magnetic seed layer structure can be controlled independently of the stripe heights of the magnetic pinned layer structure and the magnetic free layer structure.

Abstract translation: 具有磁性种子层的磁性读取传感器，形成在磁性种子层上的钉扎层结构，形成在被钉扎层结构之上的非磁性阻挡层或间隔层以及形成在非磁性屏障或间隔物上的无磁性层结构 层。 被钉扎层具有大于无磁性层结构的条带高度的条带高度（从介质面向表面测量）。 此外，磁性种子层结构具有大于磁性被钉扎层结构和无磁性层结构的条带高度的条纹高度（也从介质面向表面测量）。 可以独立于磁性钉扎层结构和无磁性层结构的条带高度来控制磁性种子层结构的条纹高度。

公开(公告)号：US20150062751A1

公开(公告)日：2015-03-05

申请号：US14011687

申请日：2013-08-27

Applicant: HGST Netherlands B.V.

Inventor： Quang Le ,  Simon H. Liao ,  Guangli Liu ,  Kochan Ju ,  Youfeng Zheng

IPC: G11B5/31

CPC classification number: G11B5/3146 ,  G11B5/3163 ,  G11B5/3932 ,  G11B5/398 ,  H01L43/08 ,  H01L43/12 ,  Y10T428/11

Abstract: A magnetic sensor having a novel pinning structure resulting in a greatly reduced gap spacing. The sensor has a magnetic free layer structure that extends to a first stripe height and a magnetic pinned layer structure that extends to a second stripe height that is longer than the first stripe high. A layer of anti-ferromagnetic material is formed over the pinned layer structure in the region beyond the first stripe height location. In this way, the antiferromagnetic layer is between the pinned layer and the second or upper shield and does not contribute to gap spacing.

Abstract translation: 具有新型钉扎结构的磁传感器导致间隙间隔大大减小。 传感器具有延伸到第一条纹高度的磁性自由层结构和延伸到长于第一条纹高度的第二条纹高度的磁性固定层结构。 在超过第一条带高度位置的区域中，在钉扎层结构上形成一层反铁磁材料。 以这种方式，反铁磁性层位于被钉扎层和第二或上部屏蔽之间，并且不会造成间隙间隔。

公开(公告)号：US08842395B2

公开(公告)日：2014-09-23

申请号：US13720959

申请日：2012-12-19

Applicant: HGST Netherlands B.V.

Inventor： Kochan Ju ,  Quang Le ,  Simon H. Liao ,  Guangli Liu

IPC: G11B5/39

CPC classification number: G11B5/3906 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3932 ,  G11B5/398 ,  H01F10/3268

Abstract: A magnetic read sensor having an extended pinned layer structure and also having an extended free layer structure. The extended pinned layer structure and extended free layer structure both extend beyond the strip height of the free layer of the sensor to provide improved pinning strength as well as improved free layer biasing reliability and bias field strength.

Abstract translation: 一种磁读取传感器，具有扩展的钉扎层结构并且还具有延伸的自由层结构。 扩展的钉扎层结构和延伸的自由层结构都延伸超过传感器自由层的条带高度，以提供改善的钉扎强度以及改进的自由层偏置可靠性和偏置场强度。

公开(公告)号：US20150221328A1

公开(公告)日：2015-08-06

申请号：US14170495

申请日：2014-01-31

Applicant: HGST Netherlands B.V.

Inventor： Quang Le ,  Simon H. Liao ,  Guangli Liu ,  Stefan Maat ,  Shuxia Wang

IPC: G11B5/39

CPC classification number: G11B5/3932 ,  G01R33/098 ,  G11B5/3163 ,  G11B5/398 ,  G11B2005/3996

Abstract: A magnetic sensor having a structure that optimizes magnetic pinning strength and magnetic free layer stability. The sensor includes a sensor stack having a magnetic free layer that extends to a first stripe height and a pinned layer that extends beyond the first stripe height to a second stripe height. Magnetic bias structures are formed at the sides of the free layer and are each formed upon a non-magnetic fill layer that raises the bias layer to the level of the free layer, the non-magnetic fill layer being at the level of the pinned layer in the sensor stack. The fill layer allows the free layer stripe height to be defined in a partial mill process while allowing the pinned layer to extend beyond the free layer stripe height and also advantageously allows the bias layers to have a stripe height that is aligned with the free layer stripe height.

Abstract translation: 具有优化磁性钉扎强度和磁自由层稳定性的结构的磁传感器。 传感器包括具有延伸到第一条带高度的无磁性层和延伸超过第一条纹高度至第二条纹高度的钉扎层的传感器堆叠。 磁偏置结构形成在自由层的侧面，并且各自形成在非磁性填充层上，该非磁性填充层将偏置层升高到自由层的高度，非磁性填充层处于被钉扎层的水平 在传感器堆栈中。 填充层允许在部分研磨过程中限定自由层条纹高度，同时允许钉扎层延伸超过自由层条纹高度，并且还有利地允许偏置层具有与自由层条纹对准的条纹高度 高度。

公开(公告)号：US20140178713A1

公开(公告)日：2014-06-26

申请号：US13725670

申请日：2012-12-21

Applicant: HGST NETHERLANDS B.V.

Inventor： Quang Le ,  Simon H. Liao ,  Guangli Liu

IPC: G11B5/127

CPC classification number: G11B5/3932 ,  B82Y10/00 ,  G11B5/3909 ,  G11B2005/3996 ,  Y10T428/11

Abstract: A magnetic read sensor having reduced hard bias free layer spacing and improved insulation robustness between the hard bias layers and the shield and sensor. The read sensor has a novel bi-layer insulation layer that can be made very thin while also providing good electrical insulation to prevent sense current shunting. The bi-layer insulation layer can be made by a process that provides improved sensor performance.

Abstract translation: 磁读取传感器具有降低的硬偏置层间隔和改善的硬偏置层与屏蔽和传感器之间的绝缘鲁棒性。 读取传感器具有新颖的双层绝缘层，其可以制成非常薄，同时还提供良好的电绝缘以防止感测电流分流。 双层绝缘层可以通过提供改进的传感器性能的方法制成。

公开(公告)号：US20160163338A1

公开(公告)日：2016-06-09

申请号：US14559856

申请日：2014-12-03

Applicant: HGST Netherlands B.V.

Inventor： Kuok S. Ho ,  Nian Ji ,  Quang Le ,  Ying Li ,  Simon H. Liao ,  Guangli Liu ,  Xiaoyong Liu ,  Suping Song ,  Shuxia Wang ,  Hualiang Yu

IPC: G11B5/39 ,  G11B5/127

CPC classification number: G11B5/3932 ,  G11B5/3909 ,  G11B5/3912

Abstract: An apparatus according to one embodiment includes a read sensor. The read sensor has an antiferromagnetic layer (AFM), a first antiparallel magnetic layer (AP1 ) positioned above the AFM layer in a first direction oriented along a media-facing surface and perpendicular to a track width direction, a non-magnetic layer positioned above the AP1 in the first direction, a second antiparallel magnetic layer (AP2) positioned above the non-magnetic layer in the first direction, a harrier layer positioned above the AP2 in the first direction, and a free layer positioned above the barrier layer in the first direction. A soft bias layer is positioned behind at least a portion of the free layer in an element height direction normal to the media-facing surface, the soft bias layer including a soft magnetic material configured to compensate for a magnetic coupling of the free layer with the AP2.

Abstract translation: 根据一个实施例的装置包括读取传感器。 读取传感器具有反铁磁层（AFM），位于AFM层上方的第一反向磁性层（AP1），沿着面向介质的表面定向并垂直于轨道宽度方向的第一方向，位于上方的非磁性层 在第一方向上的AP1，位于第一方向上的非磁性层上方的第二反并联磁性层（AP2），位于第一方向上的AP2上方的吸收层和位于第一方向上的阻挡层上方的自由层 第一个方向 柔性偏置层位于垂直于面向媒体的表面的元件高度方向上位于自由层的至少一部分之后，软偏置层包括软磁材料，其被配置为补偿自由层与 AP2。

公开(公告)号：US20150118520A1

公开(公告)日：2015-04-30

申请号：US14062789

申请日：2013-10-24

Applicant: HGST Netherlands B.V.

Inventor： Yongchul Ahn ,  Xiaozhong Dang ,  Cherngye Hwang ,  Quang Le ,  Simon H. Liao ,  Guangli Liu ,  Stefan Maat

IPC: G11B5/33 ,  G11B5/31

CPC classification number: G11B5/332 ,  G11B5/3163 ,  G11B5/3929 ,  G11B5/398 ,  Y10T428/1171

Abstract: A magnetic read sensor having improved pinning and reduced area resistance. The sensor has pinned magnetic layer that extends beyond the functional stripe of the sensor to improve magnetic pinning. The free layer has a magnetic portion that extends to the functional stripe height and a non-magnetic portion that extends beyond the functional stripe height. The sensor may have an end point detection layer located between the magnetic pinned layer and the magnetic free layer.

Abstract translation: 磁读取传感器具有改进的钉扎和减小的面积电阻。 传感器已经固定磁性层，超出传感器的功能条，以改善磁性固定。 自由层具有延伸到功能条纹高度的磁性部分和延伸超出功能条纹高度的非磁性部分。 传感器可以具有位于磁性固定层和无磁性层之间的端点检测层。

公开(公告)号：US08941954B2

公开(公告)日：2015-01-27

申请号：US13720942

申请日：2012-12-19

Applicant: HGST Netherlands B.V.

Inventor： Quang Le ,  Simon H. Liao ,  Guangli Liu ,  Kochan Ju ,  Youfeng Zheng

IPC: G11B5/39 ,  G11B5/31 ,  G11B5/56

CPC classification number: G11B5/3156 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/398 ,  G11B5/56 ,  H01F10/3272

Abstract: A magnetic read head that has improved pinned layer stability while also maintaining excellent free layer stability. The free layer has sides that define a trackwidth of the sensor and a back edge that defines a functional stripe height of the sensor. However, the pinned layer can extend significantly beyond both the width of the free layer and the back edge (e.g. stripe height) of the free layer. The sensor also has a soft magnetic bias structure that compensates for the reduced volume presented by the side extension of the pinned layer. The soft magnetic bias structure can be magnetically coupled with the trailing magnetic shield, either parallel coupled or anti-parallel coupled. In addition, all or a portion of the soft magnetic bias structure can be exchange coupled to a layer of anti-ferromagnetic material in order to improve the robustness of the soft magnetic bias structure.

Abstract translation: 一种具有改善钉扎层稳定性同时保持优异自由层稳定性的磁读头。 自由层具有限定传感器的轨道宽度的侧面和限定传感器的功能条纹高度的后边缘。 然而，被钉扎层可以显着地超过自由层的宽度和自由层的后边缘（例如条纹高度）。 传感器还具有软磁偏置结构，其补偿被钉扎层的侧延伸所呈现的减小的体积。 软磁偏置结构可以与后磁屏蔽磁耦合，并联耦合或反平行耦合。 此外，软磁偏置结构的全部或一部分可以交换耦合到一层抗铁磁材料，以便改善软磁偏置结构的鲁棒性。

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。