公开(公告)号：US20150074986A1

公开(公告)日：2015-03-19

申请号：US14550729

申请日：2014-11-21

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Akihiko TAKEO ,  Satoshi SHIROTORI ,  Kenichiro YAMADA ,  Katsuhiko KOUI

IPC: G11B5/31 ,  G11B5/127 ,  H01F41/30 ,  H01L43/08 ,  H01F10/32

CPC classification number: G11B5/3163 ,  B82Y40/00 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/0024 ,  H01F10/325 ,  H01F10/3286 ,  H01F10/329 ,  H01F41/302 ,  H01F41/308 ,  H01L43/08 ,  Y10T29/4902 ,  Y10T29/49032 ,  Y10T428/1186

Abstract: According to one embodiment, there is provided a spin torque oscillator including an oscillation layer formed of a magnetic material, a spin injection layer formed of a magnetic material and configured to inject a spin into the oscillation layer, and a current confinement layer including an insulating portion formed of an oxide or a nitride and a conductive portion formed of a nonmagnetic metal and penetrating the insulating portion in a direction of stacking. The conductive portion of the current confinement layer is positioned near a central portion of a plane of a device region including the oscillation layer and the spin injection layer.

Abstract translation: 根据一个实施例，提供了一种自旋扭矩振荡器，其包括由磁性材料形成的振荡层，由磁性材料形成的自旋注入层，并被配置为向振荡层注入自旋;以及电流限制层，其包括绝缘体 由氧化物或氮化物形成的部分和由非磁性金属形成的导电部分，并且在堆叠方向上穿透绝缘部分。 电流限制层的导电部分位于包括振荡层和自旋注入层的器件区域的平面的中心部分附近。

公开(公告)号：US20140120249A1

公开(公告)日：2014-05-01

申请号：US13760832

申请日：2013-02-06

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kaori KIMURA ,  Kazutaka TAKIZAWA ,  Akira WATANABE ,  Takeshi IWASAKI ,  Akihiko TAKEO

IPC: G11B5/84

CPC classification number: G11B5/84 ,  G11B5/855

Abstract: According to one embodiment, in a magnetic recording medium manufacturing method, an inversion liftoff layer and pattern formation layer are formed on a layer on which an inverted pattern is to be formed, a depressions pattern is formed by patterning the pattern formation layer and transferred to the inversion liftoff layer, the surface of the layer on which an inverted pattern is to be formed is exposed by removing the inversion liftoff layer from depressions, an inversion layer is formed on the inversion liftoff layer and exposed layer, and the inversion liftoff layer is removed, thereby forming, on the exposed layer, an inversion layer having a projections pattern obtained by inverting the depressions pattern.

Abstract translation: 根据一个实施例，在磁记录介质制造方法中，在要形成反转图案的层上形成反转剥离层和图案形成层，通过图案化图案形成层形成凹陷图案并将其转印到 反转剥离层，通过从凹陷中去除反转剥离层来暴露其上将形成反向图案的层的表面，在反转剥离层和暴露层上形成反型层，反转剥离层为 从而在暴露的层上形成具有通过颠倒凹凸图案而获得的突起图案的反转层。

公开(公告)号：US20230074588A1

公开(公告)日：2023-03-09

申请号：US17672016

申请日：2022-02-15

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Kaori KIMURA ,  Akihiko TAKEO ,  Takuya MATSUMOTO

IPC: G11B5/60 ,  G11B5/11 ,  G11B5/127

Abstract: According to one embodiment, a magnetic disk device includes a rotatable disk-shaped recording medium, a magnetic head including a write head having a main magnetic pole that applies a recording magnetic field to the recording medium, an assist element that assists magnetic recording by the main magnetic pole, and a plurality of thermal actuators that control a head gradient with respect to the recording medium, and a controller which includes a detection unit configured to detect deterioration of the magnetic head, and changes a head gradient of the magnetic head by the thermal actuator according to the detected deterioration.

公开(公告)号：US20190088275A1

公开(公告)日：2019-03-21

申请号：US15913288

申请日：2018-03-06

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Naoyuki NARITA ,  Tomoyuki MAEDA ,  Masaya OHTAKE ,  Gaku KOIZUMI ,  Yusuke TOMODA ,  Akihiko TAKEO

IPC: G11B5/31

Abstract: According to one embodiment, a magnetic head includes a magnetic pole having a first surface, a first shield separated from the magnetic pole along the first surface, and a stacked body provided between the magnetic pole and the first shield. The stacked body includes a magnetic layer, and first and second conductive layers. The magnetic layer includes at least one selected from the group consisting of Fe, Co, and Ni. The first conductive layer contacts the magnetic pole and the magnetic layer, and is provided between the magnetic pole and the magnetic layer. The second conductive layer contacts the magnetic layer and the first shield, is provided between the magnetic layer and the first shield. The first shield has a first shield surface contacting the second conductive layer. A ratio of a length of the magnetic layer to a length of the first shield surface is 0.1 or more.

公开(公告)号：US20140004272A1

公开(公告)日：2014-01-02

申请号：US13658658

申请日：2012-10-23

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kaori KIMURA ,  Masatoshi SAKURAI ,  Kazuto KASHIWAGI ,  Akihiko TAKEO

IPC: G11B5/84

CPC classification number: G11B5/84 ,  G11B5/746 ,  G11B5/855

Abstract: According to one embodiment, there is provided a magnetic recording medium manufacturing method including forming a resist layer on a magnetic recording layer, patterning the resist layer, forming a magnetic pattern by performing ion implantation through the resist layer, partially modifying the surface of the magnetic recording layer, removing the resist, applying a self-organization material to the surface of the magnetic recording layer and forming a dotted mask pattern, and patterning the magnetic recording layer.

Abstract translation: 根据一个实施例，提供了一种磁记录介质制造方法，包括在磁记录层上形成抗蚀剂层，图案化抗蚀剂层，通过通过抗蚀剂层进行离子注入形成磁图案，部分改变磁性表面 记录层，去除抗蚀剂，将自组织材料施加到磁记录层的表面并形成虚线掩模图案，并对磁记录层进行构图。

公开(公告)号：US20230169993A1

公开(公告)日：2023-06-01

申请号：US17860496

申请日：2022-07-08

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Kaori KIMURA ,  Masaya OHTAKE ,  Akihiko TAKEO

IPC: G11B5/29 ,  G11B5/48

CPC classification number: G11B5/29 ,  G11B5/4866 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic recording/reproducing device includes a plurality of magnetic recording medium each including a recording surface, a plurality of assisted magnetic recording heads each provided with the recording surface in order to perform assisted recording, and an assisting amount adjustment part connected to the assisted magnetic recording heads in order to adjust an assisting amount of each assisted magnetic recording head corresponding to a recording capacity of the recording surface.

公开(公告)号：US20210256996A1

公开(公告)日：2021-08-19

申请号：US17003728

申请日：2020-08-26

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Masaya OHTAKE ,  Akihiko TAKEO

IPC: G11B5/012 ,  G11B5/02 ,  G11B5/127

Abstract: A magnetic disk drive includes first and second disks having respective first and second surfaces, a first head including a first write head that writes data on the first surface at a first recording density, and a first assist element that generates a first energy for increasing a write performance by the first write head, a second head including a second write head that writes data on the second surface at a second recording density, and a second assist element that generates a second energy for increasing a write performance by the second write head, and a controller that changes one of the first and second recording densities based on a first recording capacity up to which the first head is capable of writing on the first disk, a second recording capacity up to which the second head is capable of writing on the second disk, and a target capacity.

公开(公告)号：US20190189149A1

公开(公告)日：2019-06-20

申请号：US16113094

申请日：2018-08-27

Applicant: KABUSHIKI KAISHA TOSHIBA ,  TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION

Inventor： Masaya OHTAKE ,  Akihiko TAKEO ,  Gaku KOIZUMI ,  Yusuke TOMODA

IPC: G11B5/31 ,  G11B5/60

CPC classification number: G11B5/312 ,  G11B5/6082

Abstract: A magnetic recording apparatus includes a disk-shaped recording medium with a magnetic recording layer, and a recording head that magnetically writes data onto the magnetic recording layer and includes a main magnetic pole, a write shield facing the main magnetic pole and positioned with a writing gap disposed between the main magnetic pole and the write shield, and a magnetic flux control layer disposed inside the write gap between the main magnetic pole and the writing shield. The magnetic flux control layer includes a first layer including a first metal and contacting one of the main magnetic pole and the writing shield, a second control layer, and a third layer including a second metal and contacting the other one of the main magnetic pole and the writing shield. The second control layer includes a magnetic metal and contacts the first layer and the third layer.

公开(公告)号：US20160196847A1

公开(公告)日：2016-07-07

申请号：US15070733

申请日：2016-03-15

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Takeshi IWASAKI ,  Kazutaka TAKIZAWA ,  Akira WATANABE ,  Kaori KIMURA ,  Akihiko TAKEO

IPC: G11B5/84 ,  G11B5/65

CPC classification number: G11B5/84 ,  G11B5/65 ,  G11B5/855

Abstract: A perpendicular magnetic recording medium according to an embodiment includes a substrate and perpendicular magnetic recording layer. The perpendicular magnetic recording layer includes a recording portion and non-recording portion. The recording portion has patterns regularly arranged in the longitudinal direction, and includes magnetic layers containing Fe or Co and Pt as main components, and at least one additive component selected from Ti, Si, Al, and W. The non-recording portion includes oxide layers formed by oxidizing the side surfaces of the magnetic layers, and nonmagnetic layers formed between the oxide layers.

公开(公告)号：US20150043106A1

公开(公告)日：2015-02-12

申请号：US14063344

申请日：2013-10-25

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Kenichiro YAMADA ,  Katsuhiko KOUI ,  Akihiko TAKEO

IPC: G11B5/127 ,  G11B5/10

CPC classification number: G11B5/1278 ,  G11B2005/0024

Abstract: According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer included in a recording medium, a trailing shield opposing the main pole in a down-track direction, with a write gap interposed therebetween, a pair of side shields opposing the main pole on opposite sides of the main pole in a cross-track direction, with respective gaps interposed therebetween, a recording coil configured to cause the main pole to generate a magnetic field, a first high-frequency oscillator interposed between the main pole and one of the side shields, and a second high-frequency oscillator interposed between the main pole and the other side shield.

Abstract translation: 根据一个实施例，磁头包括：主极，被配置为向包括在记录介质中的记录层施加记录磁场;在主磁极之间沿下行方向相对的后挡板，其间插入写入间隙; 与主极相对的主极的交叉轨道方向上相对设置的一对侧面屏蔽部，各自的间隙插入其间，配置成使主极产生磁场的记录线圈，第一高频振荡器 插入在主极和侧屏中的一个之间，以及插在主极和另一侧屏蔽之间的第二高频振荡器。