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。

公开(公告)号：US10297279B1

公开(公告)日：2019-05-21

申请号：US15949302

申请日：2018-04-10

Applicant: Seagate Technology LLC

Inventor： Zhiguo Ge ,  Shaun E. Mckinlay ,  Stacey C. Wakeham

IPC: G11B5/39 ,  B24B37/04

Abstract: Methods of planarizing materials, such as where surface topographies are created as part of a thin film device fabrication process are described. These methods find particular application in the creation of nano-sized devices, where surface topographical features can be effectively planarized without adversely creating other surface topographies and/or causing deleterious effects a material junctions. Methods include the step of depositing a sacrificial layer overlying at least a portion of a first material layer and at least a portion of a backfilled second material at a junction between the first and second materials. The sacrificial layer substantially retains the surface topography of the microelectronic device. Chemical-mechanical planarization is performed on a surface of the sacrificial layer but leaving a remainder portion of the thickness of the sacrificial layer. Then, physical or dry chemical process is conducted for removing the remainder of the sacrificial layer and at least a portion of at least one of the first and second materials.

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.