公开(公告)号：US09928858B1

公开(公告)日：2018-03-27

申请号：US15702571

申请日：2017-09-12

申请人： Seagate Technology LLC

发明人： Zhe Shen ,  Zuxuan Lin ,  Lei Lu ,  Jian Zhong

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

CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3166 ,  G11B5/3196 ,  G11B19/048

摘要： 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：US20180068678A1

公开(公告)日：2018-03-08

申请号：US15808796

申请日：2017-11-09

申请人： International Business Machines Corporation

发明人： Robert G. Biskeborn ,  Jason Liang ,  Calvin S. Lo ,  Andrew C. Ting

IPC分类号： G11B5/265 ,  G11B5/11 ,  G11B5/60 ,  G11B5/48 ,  G11B5/39 ,  G11B5/187 ,  G11B5/008 ,  G11B5/29 ,  G11B5/255

CPC分类号： G11B5/265 ,  G11B5/0083 ,  G11B5/11 ,  G11B5/1871 ,  G11B5/255 ,  G11B5/29 ,  G11B5/3109 ,  G11B5/3912 ,  G11B5/3967 ,  G11B5/4893 ,  G11B5/60

摘要： An apparatus according to one embodiment includes a module having a substrate, read and write transducers positioned towards a media facing side of the module, and a closure. The write transducers include write poles having media facing sides with zero or near-zero recession from a plane extending along the media facing side of a substrate of the module. The read transducers each have two shields. Media facing sides of the two shields are recessed a same amount from the plane, and are more recessed from the plane than the write poles.

公开(公告)号：US09886974B2

公开(公告)日：2018-02-06

申请号：US14927696

申请日：2015-10-30

申请人： Seagate Technology LLC

发明人： Scott Wilson Stokes ,  Victor Boris Sapozhnikov

IPC分类号： G11B5/39 ,  G11B5/60 ,  G11B5/147 ,  G11B5/11

CPC分类号： G11B5/3912 ,  G11B5/112 ,  G11B5/1475 ,  G11B5/3932 ,  G11B5/398 ,  G11B5/6082

摘要： A reader having a bearing surface, a free layer, and a free layer biasing structure. The free layer biasing structure includes at least one side shield that applies a first bias field level to a front portion of the free layer that is nearest to the bearing surface and applies a second bias field level to a rear portion of the free layer that is farthest from the bearing surface. The second bias field level is greater than the first bias field level.

公开(公告)号：US20180025745A1

公开(公告)日：2018-01-25

申请号：US15677145

申请日：2017-08-15

申请人： WESTERN DIGITAL (FREMONT), LLC

发明人： Feng Liu ,  Zhanjie LI ,  ZHIGANG BAI ,  Yi WANG

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/11

CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/3146 ,  G11B5/315

摘要： A magnetic write apparatus has a media-facing surface (MFS), a pole having leading and trailing surfaces, a trailing shield having a pole-facing surface, a write gap and coil(s). The pole's trailing surface has a portion adjoining the MFS and oriented at a nonzero, acute bevel angle from a direction perpendicular to the MFS. The pole-facing surface includes a first portion adjoining the MFS and oriented at a first angle substantially the same as the bevel angle, a second portion oriented at a second angle greater than the first trailing shield angle, and a third portion oriented at a third angle substantially the same as the first angle. The write gap has first, second and third thicknesses adjacent to the first, second and third portions of the pole-facing surface, respectively. The first thickness is constant. The second thickness varies. The third thickness is constant and greater than the first thickness.

公开(公告)号：US20170337940A1

公开(公告)日：2017-11-23

申请号：US15161999

申请日：2016-05-23

申请人： TDK CORPORATION

发明人： Hiroki ARITOMO ,  Atsushi YAMAGUCHI ,  Michitaka NISHIYAMA ,  Yumiko YOKOYAMA ,  Koichi OTANI

IPC分类号： G11B5/127 ,  H01L45/00 ,  H01L21/027 ,  G11B5/39 ,  G11B5/11

CPC分类号： G11B5/1272 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/3912 ,  H01L21/027 ,  H01L45/1675 ,  H01L45/1683 ,  H01L45/1691

摘要： A manufacturing method for a magnetic head forms a leading shield having a top surface. The top surface of the leading shield includes first and second portions. The second portion is located farther from a medium facing surface than is the first portion, and recessed from the first portion. A first gap layer is then formed on the first portion. Then, a magnetic layer including an initial first side shield, an initial second side shield and a coupling section connecting them is formed using a mold. The mold is then removed. The coupling section is then removed by etching the magnetic layer. A second gap layer and a main pole are then formed in this order.

公开(公告)号：US09761254B2

公开(公告)日：2017-09-12

申请号：US15363168

申请日：2016-11-29

申请人： Headway Technologies, Inc.

发明人： Yuchen Zhou ,  Kunliang Zhang ,  Zhi Gang Bai

IPC分类号： G11B5/39 ,  G11B5/11 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/09 ,  H01F10/30 ,  H01F10/32 ,  H01F41/30 ,  B82Y40/00 ,  H01L43/02 ,  H01L43/08

CPC分类号： G11B5/398 ,  B82Y10/00 ,  B82Y25/00 ,  B82Y40/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3906 ,  G11B5/3909 ,  G11B5/3912 ,  G11B2005/3996 ,  H01F10/30 ,  H01F10/3259 ,  H01F10/3286 ,  H01F10/3295 ,  H01F41/307 ,  H01L43/02 ,  H01L43/08

摘要： A MR sensor is disclosed that has a free layer (FL) with perpendicular magnetic anisotropy (PMA), which eliminates the need for an adjacent hard bias structure to stabilize free layer magnetization, and minimizes shield-FL interactions. In a TMR embodiment, a seed layer, free layer, junction layer, reference layer, and pinning layer are sequentially formed on a bottom shield. After forming a sensor sidewall that stops in the seed layer or on the bottom shield, a conformal insulation layer is deposited. Thereafter, a top shield is formed on the insulation layer and includes side shields that are separated from the FL by a narrow read gap. The sensor is scalable to widths

公开(公告)号：US09754611B1

公开(公告)日：2017-09-05

申请号：US14953982

申请日：2015-11-30

申请人： Western Digital (Fremont), LLC

发明人： Feng Liu ,  Zhanjie Li ,  Zhigang Bai ,  Yi Wang

IPC分类号： G11B5/11 ,  G11B5/31 ,  G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/3146 ,  G11B5/315

摘要： A magnetic write apparatus has a media-facing surface (MFS), a pole having leading and trailing surfaces, a trailing shield having a pole-facing surface, a write gap and coil(s). The pole's trailing surface has a portion adjoining the MFS and oriented at a nonzero, acute bevel angle from a direction perpendicular to the MFS. The pole-facing surface includes a first portion adjoining the MFS and oriented at a first angle substantially the same as the bevel angle, a second portion oriented at a second angle greater than the first trailing shield angle, and a third portion oriented at a third angle substantially the same as the first angle. The write gap has first, second and third thicknesses adjacent to the first, second and third portions of the pole-facing surface, respectively. The first thickness is constant. The second thickness varies. The third thickness is constant and greater than the first thickness.

公开(公告)号：US09721595B1

公开(公告)日：2017-08-01

申请号：US14560731

申请日：2014-12-04

申请人： Western Digital (Fremont), LLC

发明人： Steven C. Rudy ,  Christopher L. Beaudry ,  Shaoping Li

IPC分类号： G11B5/127 ,  H04R31/00 ,  G11B5/31 ,  G11B5/48 ,  G11B5/39 ,  G11B5/11

CPC分类号： G11B5/3169 ,  G11B5/11 ,  G11B5/127 ,  G11B5/3166 ,  G11B5/3173 ,  G11B5/3909 ,  G11B5/3912 ,  G11B5/3932 ,  G11B5/3977 ,  G11B5/486 ,  G11B5/4886

摘要： A method for providing a storage device that includes a plurality of read sensor stacks for each reader of the storage device. The plurality of read sensor stacks are distributed along a down track direction and offset in a cross-track direction. A plurality of electronic lapping guides (ELGs) are provided for the read sensor stacks. The read sensor stacks are lapped. Lapping is terminated based on signal(s) from the ELG(s).

公开(公告)号：US09721592B1

公开(公告)日：2017-08-01

申请号：US15165278

申请日：2016-05-26

申请人： TDK CORPORATION

发明人： Kei Hirata ,  Shingo Miyata

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/11 ,  G11B5/48

CPC分类号： G11B5/3116 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/315 ,  G11B5/3163 ,  G11B5/3169 ,  G11B5/4826 ,  G11B5/4833

摘要： This perpendicular magnetic recording head includes: a magnetic pole; a pair of side shields disposed to face each other with the magnetic pole interposed therebetween in a cross track direction; a pair of side gaps each provided between the magnetic pole and the pair of side shields; a trailing gap provided to cover the magnetic pole and the pair of side gaps, and having a first width in the cross track direction; and a first magnetic layer covering the trailing gap and having a second width larger than the first width in the cross track direction.

公开(公告)号：US09711168B1

公开(公告)日：2017-07-18

申请号：US15156877

申请日：2016-05-17

申请人： Western Digital (Fremont), LLC

发明人： Xiaoyu Yang ,  Jinqiu Zhang ,  Feng Liu ,  Xiaotian Zhou ,  Hai Sun ,  Ming Jiang

IPC分类号： G11B5/187 ,  G11B5/11

CPC分类号： G11B5/187 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315

摘要： A method provides magnetic write apparatus. A side shield location layer having a location corresponding to the side shield(s) and back and side surfaces is provided. Part of the back surface corresponds to the back surface of the side shield. A nonmagnetic layer adjoining the back and side surface(s) of the side shield location layer is provided. A pole trench is formed in the layers using a first etch process. The nonmagnetic and side shield location layers have an etch selectivity of at least 0.9 and not more than 1.1 for the first etch. A pole is provided in the pole trench. A remaining portion of the side shield location layer is removed using a wet etch. The nonmagnetic layer is nonremovable by the wet etch. Side shield(s) having a back surface substantially the same as the back surface of the side shield location layer are provided.