公开(公告)号：US20160365104A1

公开(公告)日：2016-12-15

申请号：US14740116

申请日：2015-06-15

Applicant: Seagate Technology LLC

Inventor： Zhiguo Ge ,  Shaun E. McKinlay ,  Eric W. Singleton ,  LiWen Tan ,  Jae Young Yi

IPC: G11B5/39

CPC classification number: G11B5/3912 ,  G11B5/397 ,  G11B5/3974 ,  G11B5/398

Abstract: Implementations described and claimed herein include a reader structure, comprising a first reader, including a sensor stack and a top shield structure, the top shield structure comprises a synthetic antiferromagnetic shield (SAF) structure, including a reference layer including at least a layer of NiFe and an impurity additive, an RKKY coupling layer RKKY coupling layer (e.g., Ru layer), and a pinned layer. In another implementation, the RL of the SAF shield structure of a first reader includes at least a layer of amorphous magnetic material. Yet, in another implementation, the SAF shield structure includes an insertion layer of amorphous magnetic material under the SAF shield RL, within the SAF shield RL or between the SAF shield RL and SAF shield Ru.

Abstract translation: 本文描述和要求保护的实施方案包括读取器结构，包括第一读取器，包括传感器堆叠和顶部屏蔽结构，顶部屏蔽结构包括合成反铁磁屏蔽（SAF）结构，其包括至少包括一层NiFe 和杂质添加剂，RKKY耦合层RKKY耦合层（例如，Ru层）和钉扎层。 在另一实施方案中，第一读取器的SAF屏蔽结构的RL至少包括一层非晶磁性材料。 然而，在另一实施方式中，SAF屏蔽结构包括在SAF屏蔽RL之下，SAF屏蔽RL内或SAF屏蔽RL和SAF屏蔽Ru之间的非晶磁性材料的插入层。

公开(公告)号：US10147447B2

公开(公告)日：2018-12-04

申请号：US15072489

申请日：2016-03-17

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Eric Walter Singleton ,  Zhiguo Ge ,  Shaun Eric McKinlay ,  Jae-Young Yi

IPC: B44C1/22 ,  G11B5/31 ,  G11B5/39

Abstract: A magnetic stack is disclosed. The magnetic stack includes a magnetically responsive lamination that includes a ferromagnetic free layer, a synthetic antiferromagnetic (SAF) structure, and a spacer layer positioned between the ferromagnetic free layer and the SAF structure. The magnetically responsive lamination is separated from a sensed data bit stored in an adjacent medium by an air bearing surface (ABS). The stack also includes a first antiferromagnetic (AFM) structure coupled to the SAF structure a predetermined offset distance from the ABS, and a second AFM structure that is separated from the first AFM structure by a first shield layer.

公开(公告)号：US09305578B1

公开(公告)日：2016-04-05

申请号：US13956912

申请日：2013-08-01

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Eric Walter Singleton ,  Zhiguo Ge ,  Shaun Eric McKinlay ,  Jae-Young Yi

IPC: G11B5/39

CPC classification number: G11B5/3163 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/398

Abstract: A magnetic stack is disclosed. The magnetic stack includes a magnetically responsive lamination that includes a ferromagnetic free layer, a synthetic antiferromagnetic (SAF) structure, and a spacer layer positioned between the ferromagnetic free layer and the SAF structure. The magnetically responsive lamination is separated from a sensed data bit stored in an adjacent medium by an air bearing surface (ABS). The stack also includes a first antiferromagnetic (AFM) structure coupled to the SAF structure a predetermined offset distance from the ABS, and a second AFM structure that is separated from the first AFM structure by a first shield layer.

Abstract translation: 公开了磁性堆叠。 磁性堆叠包括磁响应层压，其包括铁磁自由层，合成反铁磁（SAF）结构和位于铁磁性自由层和SAF结构之间的间隔层。 磁响应层压件通过空气轴承表面（ABS）与存储在相邻介质中的感测数据位分离。 堆叠还包括耦合到SAF结构与ABS的预定偏移距离的第一反铁磁（AFM）结构，以及通过第一屏蔽层与第一AFM结构分离的第二AFM结构。

公开(公告)号：US12254906B1

公开(公告)日：2025-03-18

申请号：US17808680

申请日：2022-06-24

Applicant: Seagate Technology LLC

Inventor： Cheng Bi ,  Zhiguo Ge ,  Shaun E McKinlay ,  Minzhen Cai

IPC: G11B5/31 ,  B24B37/04

Abstract: A method of planarizing a device having a surface topography with at least one material at a surface of the device is described. The method comprises the steps of depositing a stop layer over at least a portion of the at least one material which substantially retains the surface topography of the device. A sacrificial layer is deposited over at least a portion of the stop layer. A planarization process is performed on the device. The planarization process includes the steps of performing a chemical mechanical polish (CMP) on the top surface of the sacrificial layer. A physical removal step is conducted on the remainder portion of the sacrificial layer to form a planarized surface. A second CMP step and a second physical removal step are conducted, to form a planarized device.

公开(公告)号：US20170294199A1

公开(公告)日：2017-10-12

申请号：US15631372

申请日：2017-06-23

Applicant: Seagate Technology LLC

Inventor： Zhiguo Ge ,  Shaun E. McKinlay ,  Eric W. Singleton ,  LiWen Tan ,  Jae Young Yi

IPC: G11B5/39

CPC classification number: G11B5/3912 ,  G11B5/397 ,  G11B5/3974 ,  G11B5/398

Abstract: Implementations described and claimed herein include a reader structure, comprising a first reader, including a sensor stack and a top shield structure, the top shield structure comprises a synthetic antiferromagnetic shield (SAF) structure, including a reference layer including at least a layer of NiFe and an impurity additive, an RKKY coupling layer RKKY coupling layer (e.g., Ru layer), and a pinned layer. In another implementation, the RL of the SAF shield structure of a first reader includes at least a layer of amorphous magnetic material. Yet, in another implementation, the SAF shield structure includes an insertion layer of amorphous magnetic material under the SAF shield RL, within the SAF shield RL or between the SAF shield RL and SAF shield Ru.

公开(公告)号：US09685177B2

公开(公告)日：2017-06-20

申请号：US14793988

申请日：2015-07-08

Applicant: Seagate Technology LLC

Inventor： Zhiguo Ge ,  Shaun E. Mckinlay ,  Eric W. Singleton ,  LiWen Tan ,  Jae Young Yi

IPC: G11B5/39 ,  G11B5/127

CPC classification number: G11B5/3932 ,  G11B5/115 ,  G11B5/1272 ,  G11B5/3912 ,  G11B5/3954 ,  G11B5/3974

Abstract: A multi-sensor reader that includes a first sensor that has a sensing layer with a magnetization that changes according to an external magnetic field. The first sensor also includes first and second side biasing magnets having a magnetization substantially along a first direction. The first and second side biasing magnets align the magnetization of the sensing layer substantially along the first direction when the sensing layer is not substantially influenced by the external magnetic field. The multi-sensor reader further includes a second sensor that is stacked over the first sensor. The second sensor includes a reference layer that has a magnetization that is set substantially along a second direction. The first sensor further includes at least one sensor-stabilization feature that counteracts an influence of a magnetic field utilized to set the magnetization of the reference layer of the second sensor in the second direction on the magnetization of at least one of the first and second side biasing magnets in the first direction.

公开(公告)号：US09087535B2

公开(公告)日：2015-07-21

申请号：US14069015

申请日：2013-10-31

Applicant: Seagate Technology LLC

Inventor： Eric Walter Singleton ,  Zhiguo Ge

IPC: G11B5/33 ,  G11B5/39

CPC classification number: G11B5/3906 ,  G01R33/091 ,  G01R33/1284 ,  G11B5/3163 ,  G11B5/33 ,  G11B5/3912 ,  G11B5/3929 ,  G11B5/3932 ,  G11B5/3938 ,  G11B5/398

Abstract: The implementations disclosed herein provide for a spin transport sensor including a synthetic antiferromagnet (SAF) adjacent a shield element. The SAF extends to an air-bearing surface (ABS) and provides a current path from a current source to an ABS-region of a spin conductor layer. Spin current diffuses from the spin conductor layer to an adjacent free layer, which generates a measurable electrical voltage in a free layer of the spin transport sensor. The SAF serves as both a magnetic shield and a spin injector to the spin conductor layer.

Abstract translation: 本文公开的实施方案提供了一种自旋传输传感器，其包括邻近屏蔽元件的合成反铁磁体（SAF）。 SAF延伸到空气轴承表面（ABS），并提供从电流源到自旋导体层的ABS区域的电流路径。 旋转电流从自旋导体层扩散到相邻的自由层，其在自旋传输传感器的自由层中产生可测量的电压。 SAF用作磁屏蔽和自旋注入器到纺丝导体层。

公开(公告)号：US10090008B2

公开(公告)日：2018-10-02

申请号：US15631372

申请日：2017-06-23

Applicant: Seagate Technology LLC

Inventor： Zhiguo Ge ,  Shaun E. McKinlay ,  Eric W. Singleton ,  LiWen Tan ,  Jae Young Yi

IPC: G11B5/39

Abstract: Implementations described and claimed herein include a reader structure, comprising a first reader, including a sensor stack and a top shield structure, the top shield structure comprises a synthetic antiferromagnetic shield (SAF) structure, including a reference layer including at least a layer of NiFe and an impurity additive, an RKKY coupling layer RKKY coupling layer (e.g., Ru layer), and a pinned layer. In another implementation, the RL of the SAF shield structure of a first reader includes at least a layer of amorphous magnetic material. Yet, in another implementation, the SAF shield structure includes an insertion layer of amorphous magnetic material under the SAF shield RL, within the SAF shield RL or between the SAF shield RL and SAF shield Ru.

公开(公告)号：US09633679B2

公开(公告)日：2017-04-25

申请号：US14270593

申请日：2014-05-06

Applicant: Seagate Technology LLC

Inventor： Eric W. Singleton ,  Liwen Tan ,  Jae-Young Yi ,  Konstantin Nikolaev ,  Zhiguo Ge

IPC: G11B5/39 ,  G11B5/11 ,  G11B5/31

CPC classification number: G11B5/3912 ,  G11B5/3153 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3958 ,  G11B2005/3996

Abstract: A reader stack, such as for a magnetic storage device, the stack having a top synthetic antiferromagnetic (SAF) layer, a magnetic capping layer adjacent to the top SAF layer, an RKKY coupling layer adjacent to the magnetic capping layer opposite the top SAF layer, and a free layer adjacent to the RKKY coupling layer opposite the magnetic capping layer. Also included is a method for biasing a free layer in a reader stack by providing an exchange coupling between the free layer and a top synthetic antiferromagnetic (SAF) layer using a layer having RKKY coupling property positioned between the free layer and the top SAF layer and a magnetic capping layer between the SAF layer and the layer having RKKY coupling property.

公开(公告)号：US09536549B1

公开(公告)日：2017-01-03

申请号：US14826798

申请日：2015-08-14

Applicant: Seagate Technology LLC

Inventor： Zhiguo Ge ,  Victor Sapozhnikov ,  Shaun E. Mckinlay ,  Eric W. Singleton ,  Jae Young Yi ,  Mohammed Shariat Ullah Patwari

IPC: G11B5/39 ,  G11B5/127

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

Abstract: A multi-sensor reader that includes a first sensor that has a sensor stack, which includes a free layer (FL) that has a magnetization that changes according to an external magnetic field. The first sensor also includes a shielding structure that is positioned over the sensor stack. The multi-sensor reader also includes a second sensor stacked over the first sensor. The second sensor includes a sensor stack, which includes a FL that has a magnetization that changes according to the external magnetic field. The multi-sensor reader further includes an isolation layer between the first sensor and the second sensor. A FL-to-FL spacing reduction feature is included in at least one of the isolation layer or the shielding structure.

Abstract translation: 一种多传感器读取器，其包括具有传感器堆叠的第一传感器，该传感器堆叠包括具有根据外部磁场而变化的磁化的自由层（FL）。 第一传感器还包括位于传感器堆叠上方的屏蔽结构。 多传感器读取器还包括堆叠在第一传感器上的第二传感器。 第二传感器包括传感器堆，其包括具有根据外部磁场而变化的磁化的FL。 多传感器读取器还包括在第一传感器和第二传感器之间的隔离层。 在隔离层或屏蔽结构中的至少一个中包括FL-to-FL间隔缩小特征。