公开(公告)号：US10008223B1

公开(公告)日：2018-06-26

申请号：US15435561

申请日：2017-02-17

Applicant: Seagate Technology LLC

Inventor： Alexey Dobrynin ,  Zhiran Wang ,  Kevin McNeill ,  Denis O'Donnell ,  Sameh Hassan ,  Marcus Ormston ,  Robert William Lamberton

IPC: G11B5/39

CPC classification number: G11B5/3906 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/398 ,  G11B2005/3996

Abstract: A read sensor having a bearing surface and an antiferromagnetic (AFM) layer recessed from the bearing surface. The read sensor includes a synthetic antiferromagnetic (SAF) structure over the AFM layer. The SAF structure includes a recessed lower pinned layer, an upper pinned layer, a reference layer and a stabilization feature. The stabilization feature may include deliberate reduction of the antiferromagnetic coupling energy density between the upper pinned layer and the reference layer, so that it becomes lower than the first energy density of antiferromagnetic coupling between the upper pinned layer and the lower pinned layer. The stabilization feature may alternatively include an intermediate pinned layer between the lower pinned layer and the upper pinned layer. The intermediate pinned layer is antiferromagnetically coupled to both the lower pinned layer and the upper pinned layer, and at least a portion of the intermediate pinned layer is recessed behind the bearing surface.

公开(公告)号：US09870790B1

公开(公告)日：2018-01-16

申请号：US15157579

申请日：2016-05-18

Applicant: Seagate Technology LLC

Inventor： Sameh Hassan ,  Yuqing Du ,  Marcus Ormston ,  Denis O'Donnell ,  Kevin McNeill

IPC: G11B5/39 ,  G11B5/31

CPC classification number: G11B5/3912 ,  G11B5/3163 ,  G11B5/3929

Abstract: A read sensor and fabrication method thereof. The method includes forming a bottom stack that includes an antiferromagnetic (AFM) layer, a lower ferromagnetic stitch layer above the AFM layer and a sacrificial cap layer on the lower ferromagnetic stitch layer. The sacrificial cap layer is formed of a material that alloys magnetically with the lower ferromagnetic stitch layer. The method further includes substantially removing the sacrificial cap layer. After substantially removing the sacrificial layer, an upper ferromagnetic stitch layer is deposited on the lower ferromagnetic stitch layer of the bottom stack to form a stitch interface that provides relatively strong magnetic coupling between the lower ferromagnetic stitch layer of the bottom stack and the upper ferromagnetic stitch layer.

公开(公告)号：US20150187373A1

公开(公告)日：2015-07-02

申请号：US14140815

申请日：2013-12-26

Applicant: Seagate Technology LLC

Inventor： Denis O'Donnell ,  John Rooney ,  Thomas McLaughlin

IPC: G11B5/11

CPC classification number: G11B5/112 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163

Abstract: Methods for fabricating a shield structure for a pole tip of a write element for magnetic recording are disclosed. In illustrated embodiments disclosed, a side shield deposition is etched below a front edge surface of the pole tip and one or more depositions are deposited on the etched side shield deposition to form a side shield structure having an extended gap region to enhance performance of the write element. In illustrated embodiments, multiple gap depositions are deposited to form the extended gap region and side shield structure. One or both of the multiple gap depositions are etched to remove outer portions of the deposition prior to depositing the front shield structure.

Abstract translation: 公开了用于制造用于磁记录的写入元件的极尖的屏蔽结构的方法。 在所公开的图示实施例中，在极尖的前边缘表面下方蚀刻侧屏蔽沉积，并且在蚀刻的侧屏蔽沉积上沉积一个或多个沉积物以形成具有扩展间隙区域的侧屏蔽结构，以增强写入的性能 元件。 在所示实施例中，沉积多个间隙沉积以形成延伸的间隙区域和侧面屏蔽结构。 在沉积前屏蔽结构之前，蚀刻多个间隙沉积中的一个或两个以去除沉积物的外部部分。