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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
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.
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公开(公告)号：US09928881B1
公开(公告)日：2018-03-27
申请号：US15711790
申请日：2017-09-21
Applicant: Seagate Technology LLC
Inventor： Zhe Shen , Zuxuan Lin , Lei Lu , Jianhua Xue
CPC classification number: G11B27/36 , G11B5/012 , G11B5/455 , G11B5/4555 , G11B5/5552 , G11B20/10009 , G11B20/10481 , G11B20/10509 , G11B2005/0013
Abstract: A method of testing a dynamic write field of a recording head includes preparing a test magnetic medium and recording a write signal on the test magnetic medium with the write signal being set at a first write parameter and a second write parameter. An average of multiple read-back signals of the recorded write signal are captured to determine an average amplitude of the read-back signals. The recording of the write signal on the test magnetic medium and the capturing of the average of multiple read-back signals of the recorded write signal are repeated to determine the average amplitude of the read-back signals by fixing the first write parameter of the write signal and changing the second write parameter of the write signal until the average amplitude of the read-back signals saturates.
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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
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.
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公开(公告)号：US20170092300A1
公开(公告)日：2017-03-30
申请号：US14863673
申请日：2015-09-24
Applicant: Seagate Technology LLC
Inventor： Lei Lu , Kirill Rivkin , Xuelian Xu , Huaqing Yin
CPC classification number: G11B5/115 , G11B5/11 , G11B5/112 , G11B5/1278 , G11B5/315 , G11B5/3163
Abstract: A data writer can have at least a write pole separated from first and second side shields by a continuous dielectric gap layer. Each side shield may have first and second shield sub-layers configured with different magnetic moments that increase relative to the sub-layer's distance from the write pole. The side shields may wrap around a leading tip of the write pole to form a box shield.
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公开(公告)号：US09972345B1
公开(公告)日：2018-05-15
申请号：US14974743
申请日：2015-12-18
Applicant: Seagate Technology LLC
Inventor： Wei Tian , Hauqing Yin , Lei Lu , Yong Luo , Joseph Mundenar
CPC classification number: G11B5/1272 , G11B5/112 , G11B5/1278
Abstract: A method includes depositing a layer of pole material on a substrate. The layer of pole material has a bottom surface that is adjacent to the substrate and a top surface that is opposite the bottom surface. A masking material is deposited over a portion of the top surface. Material from the pole material unprotected by the masking material is removed to form a write pole having first and second side walls. At least a portion of a trench formed by removal of the material from the layer of pole material is filled with a sacrificial material. The mask and a portion of the write pole at the top surface are removed to form a beveled trailing edge surface. The sacrificial material is then removed. Front shield gap material is deposited over the beveled trailing edge surface and over portions of the side walls.
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Patent Agency Ranking
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
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.
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公开(公告)号：US09263066B1
公开(公告)日：2016-02-16
申请号：US14702455
申请日：2015-05-01
Applicant: Seagate Technology LLC
Inventor： Venkateswara Inturi , Lei Lu , Joseph M. Mundenar , Huaqing Yin
IPC: G11B5/127
CPC classification number: G11B5/127 , G11B5/1278 , G11B5/232 , G11B5/235 , G11B5/3116 , G11B5/315
Abstract: A data writer can be configured with at least a write pole separated from a front shield by a non-magnetic gap layer. The front shield may consist of at least a seed layer and a shielding layer with the shielding layer having an easy axis coercivity along a first direction of 4 Oe or more and a hard axis coercivity along a second direction of 0.5 Oe or more.
Abstract translation: 数据写入器可以被配置成具有至少一个与前屏蔽件由非磁隙层分离的写入极。 前屏蔽可以由至少种子层和屏蔽层组成，屏蔽层沿着第一方向为4Oe以上具有容易的轴矫顽力，并且沿着第二方向具有0.5Oe以上的硬轴矫顽力。
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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
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.
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公开(公告)号：US09384769B2
公开(公告)日：2016-07-05
申请号：US14867573
申请日：2015-09-28
Applicant: Seagate Technology LLC
Inventor： Jiaoming Qiu , Lei Lu , Xuelian Xu
CPC classification number: G11B5/6082 , G11B5/1272 , G11B5/1278 , G11B5/147 , G11B5/17 , G11B5/3116 , G11B5/3123
Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.
Abstract translation: 一种具有写入极的写入头，其具有限定极尖的尖端部分和从所述尖端部分远离所述极尖端延伸的桨状部分，所述桨形部分限定了后缘。 写头还具有线圈结构，该线圈结构具有至少两个与该桨叶部分相交的活动匝，其中线圈结构的背面经过写入极的后边缘不超过1微米。 在一些实施方案中，从极尖到后缘的长度不超过4.5微米。
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公开(公告)号：US20160133290A1
公开(公告)日：2016-05-12
申请号：US14867573
申请日：2015-09-28
Applicant: Seagate Technology LLC
Inventor： Jiaoming Qiu , Lei Lu , Xuelian Xu
CPC classification number: G11B5/6082 , G11B5/1272 , G11B5/1278 , G11B5/147 , G11B5/17 , G11B5/3116 , G11B5/3123
Abstract: A write head having a write pole with a tip portion defining a pole tip and a paddle portion extending from the tip portion away from the pole tip, the paddle portion defining a back edge. The write head also has a coil structure having at least two active turns crossing the paddle portion, wherein a back of the coil structure is no more than 1 micrometer past the back edge of the write pole. In some implementations, a length from the pole tip to the back edge is no more than 4.5 micrometers.
Abstract translation: 一种具有写入极的写入头，其具有限定极尖的尖端部分和从所述尖端部分远离所述极尖端延伸的桨状部分，所述桨形部分限定了后缘。 写头还具有线圈结构，该线圈结构具有至少两个与该桨叶部分相交的活动匝，其中线圈结构的背面经过写入极的后边缘不超过1微米。 在一些实施方案中，从极尖到后缘的长度不超过4.5微米。
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