公开(公告)号：US20240363141A1

公开(公告)日：2024-10-31

申请号：US18765906

申请日：2024-07-08

申请人： KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

发明人： Yuji NAKAGAWA ,  Naoyuki NARITA ,  Masayuki TAKAGISHI ,  Tomoyuki MAEDA ,  Tazumi NAGASAWA

IPC分类号： G11B5/21 ,  G11B5/127 ,  G11B5/31

CPC分类号： G11B5/21 ,  G11B5/1278 ,  G11B5/3146

摘要： According to one embodiment, a magnetic head includes first and second magnetic poles, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic layer, a second magnetic layer provided between the first magnetic layer and the second magnetic pole, a first nonmagnetic layer provided between the first and second magnetic layers, a second nonmagnetic layer provided between the second magnetic layer and the second magnetic pole, and a third nonmagnetic layer provided between the first magnetic pole and the first magnetic layer. The first magnetic layer includes a first element including at least one of Fe, Co, or Ni. The second magnetic layer includes (Fe100-xCox)100-yEy. A second element E includes at least one selected from the group consisting of Cr, V, Mn, Yi, and Sc. The first magnetic layer does not include the second element.

公开(公告)号：US20240347072A1

公开(公告)日：2024-10-17

申请号：US18625025

申请日：2024-04-02

申请人： Headway Technologies, Inc.

发明人： Xiaomin Liu ,  Wenjie Chen ,  Yue Liu ,  Weihao Xu ,  Yuhui Tang ,  Feiyue Li

IPC分类号： G11B5/115 ,  G11B5/11 ,  G11B5/127

CPC分类号： G11B5/115 ,  G11B5/112 ,  G11B5/1278

摘要： The present embodiments relate to a PMR write head with a trailing shield that comprises a FeCoNiM composition. The FeCoNiM composition can be formed via an electroplating process by adding Fe2+, Co2+, Ni2+ and a transition metal salt to an aqueous solution comprised of other additives in an electroplating cell that has an Ni or Co as the anode. The plated HD magnetic material as the trailing shield in a PMR writer can minimize a wide area track erasure (WATE). Further, a high moment high damping shield can lower bit error rate (BER) and increase aerial density capability (ADC) of the write head.

公开(公告)号：US20240312483A1

公开(公告)日：2024-09-19

申请号：US18122362

申请日：2023-03-16

申请人： Headway Technologies, Inc.

发明人： Yu-Hsia Chen ,  Weihao Xu ,  Jiun-Ting Lee ,  Weisheng Hu ,  Yuhui Tang ,  Yue Liu

IPC分类号： G11B5/11 ,  G11B5/127

CPC分类号： G11B5/112 ,  G11B5/1278

摘要： The present embodiments relate to a perpendicular magnetic recording (PMR) write head with a self-aligned side gap insulator. A self-aligned SG oxide insulator can reduce or eliminate the current from MP to SS. The SG insulator can force the writer current to go through a writer gap and leading gap, which can improve ATI and TPI performance.

公开(公告)号：US12087337B2

公开(公告)日：2024-09-10

申请号：US17872651

申请日：2022-07-25

申请人： FUJIFILM Corporation

发明人： Norihito Kasada

IPC分类号： G11B5/584 ,  G11B5/127 ,  G11B5/73 ,  G11B5/78

CPC分类号： G11B5/584 ,  G11B5/73927 ,  G11B5/78 ,  G11B5/127 ,  G11B5/739

摘要： A magnetic tape device. The angle θ formed by the axis of the element array of the magnetic head with respect to a width direction of the magnetic tape is changed during running of the magnetic tape in the magnetic tape device. In a case where a maximum value of an absolute value of a difference between a servo band spacing obtained before storage in a predetermined environment and a servo band spacing obtained after storage in the environment for a storage time T is defined as A, and T is set to a plurality of predetermined times, a medium life calculated by a linear function of A and a logarithm loge T of T, that are derived from a value of A and a value of the logarithm loge T of T obtained for each T is 5 years or longer.

公开(公告)号：US20240296861A1

公开(公告)日：2024-09-05

申请号：US18358872

申请日：2023-07-25

申请人： KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

发明人： Yuji NAKAGAWA ,  Ryo OSAMURA ,  Masayuki TAKAGISHI ,  Naoyuki NARITA ,  Tomoyuki MAEDA ,  Tazumi NAGASAWA ,  Kosuke KURIHARA

IPC分类号： G11B5/187 ,  G11B5/127 ,  G11B5/31 ,  G11B5/49

CPC分类号： G11B5/1875 ,  G11B5/1272 ,  G11B5/3133 ,  G11B5/4992

摘要： According to one embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a magnetic element provided between the first and the second magnetic poles. The magnetic element includes first to fourth magnetic layers, and first to fifth non-magnetic layers. The fourth magnetic layer includes a first element and at least one of Fe, Co or Ni. The first element including at least one selected from the group consisting of Cr, V, Mn, Ti, N and Sc. The fourth non-magnetic layer including at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag. The fifth non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag.

公开(公告)号：US20240233758A9

公开(公告)日：2024-07-11

申请号：US17972514

申请日：2022-10-24

申请人： Headway Technologies, Inc.

发明人： Yue Liu ,  Moris Musa Dovek ,  Yan Wu

IPC分类号： G11B5/31 ,  G11B5/127

CPC分类号： G11B5/315 ,  G11B5/1278 ,  G11B5/3163

摘要： The present embodiments relate to a perpendicular magnetic recording (PMR) write head with a Tunable Pole Protrusion or Tunable Pole Performance (TPP) side bridge design. A PMR write head can include a main pole including a tip portion configured to be disposed at an air-bearing surface (ABS) and configured to interact with a magnetic recording medium. The PMR write head can also include a hot seed (HS) portion and a first write shield. The PMR write head can also include a first metallic side bridge disposed between the tip portion of the main pole and the HS portion. The PMR write head can also include a bias circuit including at least a first bias electrical pad and a second electrical bias pad directing an electrical current flow along an electrical path between the tip portion of the main pole and the write shield portion via the first metallic side bridge.

公开(公告)号：US11881237B1

公开(公告)日：2024-01-23

申请号：US17456440

申请日：2021-11-24

申请人： Western Digital Technologies, Inc.

发明人： Muhammad Asif Bashir ,  Edward Hin Pong Lee ,  Amanda Baer ,  Aron Pentek ,  Zhigang Bai ,  Yunfei Ding ,  James Terrence Olson ,  Alexander Goncharov ,  Petrus Antonius Van Der Heijden

IPC分类号： G11B5/11 ,  G11B5/127 ,  G11B5/235 ,  G11B5/31 ,  G11B5/21 ,  G11B5/00

CPC分类号： G11B5/315 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/314 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/3146 ,  G11B5/21 ,  G11B2005/0024

摘要： The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a current flow in a cross-track direction around a main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the main pole and the trailing shield. A hot seed layer is disposed between the trailing gap and the trailing shield. A first insulation layer is disposed between the hot seed layer and the trailing shield, where the first insulation layer contacts the side shields. A second insulation layer is disposed between the main pole and leading shield, where the second insulation layer contacts the side shields. The first and second insulation layers direct the current through the side shields and across the main pole in a cross-track direction.

公开(公告)号：US11881236B2

公开(公告)日：2024-01-23

申请号：US17845797

申请日：2022-06-21

申请人： Western Digital Technologies, Inc.

发明人： James Mac Freitag ,  Susumu Okamura ,  Christian Kaiser

IPC分类号： G11B5/235 ,  G11B5/31 ,  G11B5/127 ,  G11B5/00

CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/314 ,  G11B5/3133 ,  G11B5/3116 ,  G11B2005/0024

摘要： The present disclosure generally relates to a magnetic recording head comprising a spintronic device. The spintronic device is disposed between a main pole and a trailing shield of the magnetic recording head. The spintronic device comprises a multilayer spacer layer comprising a Cu layer in contact with a spin torque layer and a spin transparent texture layer disposed on the Cu layer, the spin transparent texture layer comprising AgSn or AgZn. A multilayer notch comprising a CoFe layer is disposed over the spin transparent texture layer of the multilayer spacer layer and a Heusler alloy layer is disposed on the CoFe layer, the Heusler alloy layer comprising CoMnGe, CoFeGe, or CoFeMnGe. The multilayer spacer layer and the multilayer notch result in the spintronic device having a high spin polarization and a reduced critical current.

公开(公告)号：US11854581B2

公开(公告)日：2023-12-26

申请号：US17860343

申请日：2022-07-08

申请人： Western Digital Technologies, Inc.

发明人： Suping Song ,  Zhanjie Li ,  Terence T. Lam ,  Lijie Guan

IPC分类号： G11B5/11 ,  G11B5/31 ,  G11B5/127 ,  G11B5/235 ,  G11B5/012 ,  G11B5/02 ,  G11B5/00

CPC分类号： G11B5/315 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/3143 ,  G11B5/3146 ,  G11B5/012 ,  G11B5/02 ,  G11B5/11 ,  G11B2005/0024

摘要： Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.

公开(公告)号：US11848034B2

公开(公告)日：2023-12-19

申请号：US17541794

申请日：2021-12-03

申请人： Western Digital Technologies, Inc.

发明人： Yingjian Chen ,  Yonghua Chen ,  Anna Zheng ,  Zhanjie Li ,  Yi Wang ,  Jian Xiang Shen ,  Lijie Guan

IPC分类号： G11B5/31 ,  G11B5/127 ,  G11B5/39

CPC分类号： G11B5/3113 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3146 ,  G11B5/3912

摘要： The present disclosure generally relates to magnetic recording devices with stable magnetization. The magnetic recording device comprises a lower leading shield, an upper leading shield disposed on the lower leading shield, a main pole disposed above the upper leading shield, a trailing shield disposed above the main pole and upper leading shield, and an upper return pole disposed above the trailing shield. A first non-magnetic layer is disposed between the lower leading shield and the upper leading shield, and a second non-magnetic layer is disposed between the trailing shield and the upper return pole. The lower leading shield has a different domain state than the upper leading shield, and the trailing shield and the upper leading shield have a same domain state. The materials and thickness of the first and second non-magnetic layers result in magnetostatic coupling or anti-ferromagnetic coupling.