公开(公告)号：US09721591B1

公开(公告)日：2017-08-01

申请号：US15097182

申请日：2016-04-12

Applicant: Western Digital (Fremont), LLC

Inventor： Feng Liu ,  Zhigang Bai ,  Peng Luo ,  Jinqiu Zhang ,  Ming Sun ,  Xiaoyu Yang ,  Yifan Zhang ,  Xiaojun Zhang ,  Ming Jiang

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/21 ,  G11B5/147

CPC classification number: G11B5/3116 ,  G11B5/1278 ,  G11B5/1475 ,  G11B5/21 ,  G11B5/3146

Abstract: A magnetic write apparatus has a media-facing surface (MFS) and includes an auxiliary pole, coil(s) and a main pole having a pole tip and a yoke. The pole tip occupies part of the MFS. The yoke has a yoke length measured from the MFS in a yoke direction perpendicular to the MFS. The yoke length is less than four microns. The main pole has a total length in the yoke direction and a width in a cross-track direction. The main pole is continuous along the total length. The aspect ratio of the main pole is the total length divided by the width and exceeds one. The main pole includes surface(s) having a nonzero acute flare angle from the MFS. The auxiliary pole is adjacent to the main pole and recessed from the MFS by not more than 1.05 micron. The coil(s) energizes the main pole and have not more than two turns.

公开(公告)号：US09431038B1

公开(公告)日：2016-08-30

申请号：US14753630

申请日：2015-06-29

Applicant: Western Digital (Fremont), LLC

Inventor： Jinqiu Zhang ,  Xiaoyu Yang ,  Feng Liu ,  Xiaojun Zhang ,  Krishna Chetry ,  Masahiro Osugi ,  Ning Wu

IPC: G11B5/11 ,  B44C1/22 ,  G11B5/31 ,  G11B5/60

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

Abstract: A method provides a magnetic device having an air-bearing surface (ABS) location. A layer including first and second sublayers is provided. The first sublayer includes the ABS location. The second sublayer recessed from the ABS location such that part of the first sublayer is between the second sublayer and the ABS location. The first sublayer has a rear surface oriented at a nonzero, acute angle from a surface perpendicular to the ABS location. A trench is formed in the layer. The trench has a bottom, a top and sidewalls. The sidewalls form a first angle with a direction perpendicular to the bottom at the ABS location. The sidewalls form a second angle with the direction in part of the second sublayer. The second angle is smaller than the first angle. The sidewall angle varies along the rear surface of the first sublayer. A main pole is provided in the trench.

Abstract translation: 一种方法提供具有空气轴承表面（ABS）位置的磁性装置。 提供包括第一和第二子层的层。 第一子层包括ABS位置。 第二子层从ABS位置凹陷，使得第一子层的一部分位于第二子层和ABS位置之间。 第一子层具有从垂直于ABS位置的表面定向成非零锐角的后表面。 在该层中形成沟槽。 沟槽具有底部，顶部和侧壁。 在ABS位置处，侧壁与垂直于底部的方向形成第一角度。 侧壁与第二子层的一部分中的方向形成第二角度。 第二角度小于第一角度。 侧壁角沿第一子层的后表面变化。 沟槽中设有主极。

公开(公告)号：US10115416B2

公开(公告)日：2018-10-30

申请号：US15652629

申请日：2017-07-18

Applicant: WESTERN DIGITAL (FREMONT), LLC

Inventor： Feng Liu ,  Zhigang Bai ,  Peng Luo ,  Jinqiu Zhang ,  Ming Sun ,  Xiaoyu Yang ,  Yifan Zhang ,  Xiaojun Zhang ,  Ming Jiang

IPC: G11B5/31 ,  G11B5/127 ,  G11B5/21 ,  G11B5/147

Abstract: A magnetic write apparatus has a media-facing surface (MFS) and includes an auxiliary pole, coil(s) and a main pole having a pole tip and a yoke. The pole tip occupies part of the MFS. The yoke has a yoke length measured from the MFS in a yoke direction perpendicular to the MFS. The yoke length is less than four microns. The main pole has a total length in the yoke direction and a width in a cross-track direction. The main pole is continuous along the total length. The aspect ratio of the main pole is the total length divided by the width and exceeds one. The main pole includes surface(s) having a nonzero acute flare angle from the MFS. The auxiliary pole is adjacent to the main pole and recessed from the MFS by not more than 1.05 micron. The coil(s) energizes the main pole and have not more than two turns.

公开(公告)号：US09741366B1

公开(公告)日：2017-08-22

申请号：US14871553

申请日：2015-09-30

Applicant: Western Digital (Fremont), LLC

Inventor： Jinqiu Zhang ,  Feng Liu ,  Ming Sun ,  Yunfei Li ,  Ming Jiang ,  Xiaojun Zhang

IPC: G11B5/127 ,  G11B5/187 ,  G11B5/31

CPC classification number: G11B5/1272 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/187 ,  G11B5/23 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3163

Abstract: A method provides a magnetic transducer having a media-facing surface (MFS). The method includes providing a pole, providing a side gap, providing coil(s) for energizing the pole and providing side shield(s). A portion of the pole resides at the MFS. The side gap is between the pole and the side shield(s). The side shield(s) have a gradient in a saturation magnetization such that the saturation magnetization increases in a yoke direction perpendicular to the MFS. The step of providing the side shield(s) further includes providing a nonmagnetic structure having a side surface parallel to the MFS and providing at least one side shield layer. A portion of the side shield layer(s) are on the side surface. The portion of the side shield layer(s) has the gradient in the saturation magnetization. At least part of the side shield being formed by the portion of the side shield layer(s).