公开(公告)号：US09805742B1

公开(公告)日：2017-10-31

申请号：US15445267

申请日：2017-02-28

Applicant: Seagate Technology LLC

Inventor： Kirill A. Rivkin ,  JianHua Xue ,  Wei Tian ,  Lei Lu ,  Jian Zhong

IPC: G11B5/09 ,  G11B5/17 ,  G11B5/31

CPC classification number: G11B5/17 ,  G11B5/012 ,  G11B5/3123

Abstract: A data writer may be constructed and operated as part of a data storage device. The data writer can be positioned proximal a data storage medium. The data writer may have a write pole positioned adjacent a writer coil with the writer coil having a plurality of turns. A controller that is connected to each turn can be adapted to selectively activate less than all the coil turns in response to the data writer being positioned over a first portion of a data storage medium and selectively activate all of the coil turns in response to the data writer being positioned over a second portion of the data storage medium.

公开(公告)号：US09928858B1

公开(公告)日：2018-03-27

申请号：US15702571

申请日：2017-09-12

Applicant: Seagate Technology LLC

Inventor： Zhe Shen ,  Zuxuan Lin ,  Lei Lu ,  Jian Zhong

IPC: G11B5/31 ,  G11B19/04 ,  G11B5/11 ,  G11B5/127

CPC classification number: G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3166 ,  G11B5/3196 ,  G11B19/048

Abstract: A method that includes supplying a predetermined signal to a write head having side shields. The method also includes performing, by the write head, a recording operation on a surface of a data storage medium, when the predetermined signal is supplied to the write head, to provide a recorded magnetization pattern. The method further includes carrying out measurements on a portion of the recorded magnetization pattern influenced by a magnetization of the side shields. The measurements are employed to determine whether a reversed side shield magnetization condition is present in the write head.

公开(公告)号：US10134428B1

公开(公告)日：2018-11-20

申请号：US15797668

申请日：2017-10-30

Applicant: Seagate Technology LLC

Inventor： Kirill A. Rivkin ,  JianHua Xue ,  Wei Tian ,  Lei Lu ,  Jian Zhong

IPC: G11B5/09 ,  G11B5/17 ,  G11B5/31

Abstract: A data writer may be constructed and operated as part of a data storage device. The data writer can be positioned proximal a data storage medium. The data writer may have a write pole positioned adjacent a writer coil with the writer coil having a plurality of turns. A controller that is connected to each turn can be adapted to selectively activate less than all the coil turns in response to the data writer being positioned over a first portion of a data storage medium and selectively activate all of the coil turns in response to the data writer being positioned over a second portion of the data storage medium.

公开(公告)号：US10770096B1

公开(公告)日：2020-09-08

申请号：US16273778

申请日：2019-02-12

Applicant: Seagate Technology LLC

Inventor： Wei Tian ,  Javier Guzman ,  Jianhua Xue ,  Kirill Rivkin ,  Jian Zhong ,  Lei Lu

IPC: G11B5/48 ,  G11B5/10 ,  G11B5/008

Abstract: A recording head includes a bearing surface, a first writer and a first shield structure for the first writer. The recording head also includes a second writer and a second shield structure for the second writer. The recording head further includes a magnetic bridge connecting the first shield structure to the second shield structure at the bearing surface.

公开(公告)号：US09805744B1

公开(公告)日：2017-10-31

申请号：US15088752

申请日：2016-04-01

Applicant: Seagate Technology LLC

Inventor： Jianhua Xue ,  Jian Zhong ,  Lei Lu ,  Yan Dong ,  Kirill Rivkin

IPC: G11B5/31 ,  G11B5/127

CPC classification number: G11B5/3116 ,  G11B5/012 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/29 ,  G11B5/315 ,  G11B5/4886

Abstract: The disclosed technology includes a storage device including an interlaced magnetic recording (IMR) system, and a transducer head, including two writers, each writer including a write pole, wherein a width of a first write pole in a cross-track direction is substantially greater than a width of a second write pole in the cross-track direction, and wherein a down-track width of a front shield gap of the first write pole is substantially similar to down-track width of a front shield gap of the second write pole. In another implementation, the storage device includes an IMR system, and a transducer head, including two writers, each writer including a write pole, wherein a width of the first write pole in a cross-track direction is substantially greater than a width of a second write pole in a cross-track direction, and wherein a cross-track width of a side shield gap of the first write pole is substantially similar to a cross-track width of a side shield gap of the second write pole.