公开(公告)号：US20170148471A1

公开(公告)日：2017-05-25

申请号：US14950938

申请日：2015-11-24

Applicant: HGST Netherlands B.V.

Inventor： Satoshi Tabata ,  Atsushi Yamada ,  Michiya Kazusawa ,  Masato Shiimoto

IPC: G11B5/09

CPC classification number: G11B20/10009 ,  G11B5/02 ,  G11B5/1278 ,  G11B5/235 ,  G11B5/3153 ,  G11B5/40 ,  G11B5/465 ,  G11B2005/0024

Abstract: A magnetic recording system for preventing data loss resulting magnetic oscillator current. The magnetic recording system includes a magnetic write head with a magnetic write pole, a magnetic oscillator near the magnetic write pole, and a write coil for magnetizing the write pole. Circuitry is connected with the magnetic write coil to supply a current to the write coil and connected with the magnetic oscillator to supply a current to the magnetic oscillator. The circuitry is configured to ensure that the current to the magnetic oscillator does not inadvertently magnetize the write pole after the magnetic write pole has demagnetized.

公开(公告)号：US09336797B2

公开(公告)日：2016-05-10

申请号：US14290768

申请日：2014-05-29

Applicant: HGST Netherlands B.V.

Inventor： Masukazu Igarashi ,  Masato Matsubara ,  Keiichi Nagasaka ,  Yo Sato ,  Masato Shiimoto ,  Masashige Sato

IPC: G11B5/00 ,  G11B5/127

CPC classification number: G11B5/00 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/235 ,  G11B5/3146 ,  G11B2005/0024

Abstract: The present disclosure generally relates to a high-frequency oscillator for use in a recording device having a microwave-assisted magnetic recording head. The microwave-assisted magnetic recording head achieves a large assist effect by using an extended spin torque oscillator disposed between a main magnetic pole and a pole opposite the main magnetic pole. The spin torque oscillator obtains a strong high-frequency magnetic field and comprises a first non-magnetic spin scatterer, a reference layer, a first non-magnetic spin transfer layer, a first magnetic field generating layer, a second non-magnetic spin transfer layer, a second magnetic field generating layer, and a second non-magnetic spin scatterer. The spin torque oscillator has a drive current flowing though in the direction from the first magnetic field generating layer to the reference layer.

Abstract translation: 本公开总体上涉及用于具有微波辅助磁记录头的记录装置中的高频振荡器。 微波辅助磁记录头通过使用设置在主磁极和与主磁极相对的极之间的扩展旋转扭矩振荡器来实现大的辅助效果。 旋转扭矩振荡器获得强的高频磁场，并且包括第一非磁性旋转散射体，参考层，第一非磁性自旋转移层，第一磁场产生层，第二非磁性自旋转移层 ，第二磁场产生层和第二非磁性旋转散射体。 自旋转矩振荡器具有沿着从第一磁场产生层到参考层的方向流动的驱动电流。

公开(公告)号：US09007724B1

公开(公告)日：2015-04-14

申请号：US14302549

申请日：2014-06-12

Applicant: HGST Netherlands B.V.

Inventor： Masaru Furukawa ,  Junguo Xu ,  Masato Shiimoto ,  Jianhua Li

IPC: G11B5/33 ,  G11B5/48 ,  G11B21/02

CPC classification number: G11B5/48 ,  G11B5/314 ,  G11B5/40 ,  G11B2005/0024

Abstract: Embodiments disclosed herein generally relate to the data storage field and hard disk drives (HDD) using microwave assisted magnetic recording (MAMR) technology. Aspects of the preferred embodiments are to prevent the breakdown of spin torque oscillators (STO) due to large amounts of current flowing through the STO during head/disk contact. A magnetic head slider is disposed above and spaced apart from a disk. A STO is formed on a section of the magnetic head slider. Two electrodes are coupled to the STO, and one electrode has a higher potential than the other electrode. A preamplifier is adapted to send a current through the two electrodes, resulting in the higher potential electrode protruding closer to the disk than the lower potential electrode. Current then flows from one electrode to the disk without flowing through the STO, and breakdown of the STO is prevented.

Abstract translation: 本文公开的实施例通常涉及使用微波辅助磁记录（MAMR）技术的数据存储区域和硬盘驱动器（HDD）。 优选实施例的方面是防止由于在头/盘接触期间流过STO的大量电流而导致的自旋转矩振荡器（STO）的故障。 磁头滑块设置在盘的上方并与盘间隔开。 在磁头滑块的一部分上形成STO。 两个电极耦合到STO，一个电极具有比另一个电极更高的电位。 前置放大器适合于通过两个电极发送电流，导致较低电位电极比较靠近磁盘的电位较高的电极。 电流然后从一个电极流到盘而不流过STO，并且防止了STO的击穿。

公开(公告)号：US20140177105A1

公开(公告)日：2014-06-26

申请号：US13725593

申请日：2012-12-21

Applicant: HGST NETHERLANDS B.V.

Inventor： Masato Shiimoto ,  Ikuya Tagawa ,  Yasutaka Nishida ,  Hiroyuki Katada

IPC: G11B5/105

CPC classification number: G11B5/105 ,  G11B5/4886 ,  G11B2005/0024

Abstract: A magnetic disk drive system configured for shingled magnetic data recording wherein data tracks are recorded in an overlapping fashion on a magnetic media. The disk drive system includes magnetic write heads that are asymmetric so as to have increased writing at one side of the write head. The magnetic disk drive system includes magnetic write heads that are mirror images of one another so that write heads located at opposite surfaces of the magnetic media (e.g. one head facing up and one facing down) end up having preferential writing in the location relative to inner and outer diameters of the magnetic media.

Abstract translation: 一种磁盘驱动器系统，其配置用于带状磁数据记录，其中数据轨道以重叠的方式记录在磁性介质上。 磁盘驱动器系统包括不对称的磁性写入头，以便在写入头的一侧具有增加的写入。 磁盘驱动系统包括作为彼此的镜像的磁性写入头，使得位于磁性介质的相对表面上的写入头（例如，一个头部朝上且面向下的一个）最终在相对于内部的位置具有优先写入 和磁性介质的外径。

公开(公告)号：US09047888B2

公开(公告)日：2015-06-02

申请号：US13723070

申请日：2012-12-20

Applicant: HGST Netherlands B.V.

Inventor： Hiroyuki Katada ,  Masato Shiimoto

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/00

CPC classification number: G11B5/314 ,  G11B2005/0024

Abstract: A microwave-assisted magnetic recording (MAMR) head according to one embodiment includes a main magnetic pole adapted to generate a writing magnetic field when current is applied to a write coil; a trailing shield positioned, at an air bearing surface (ABS), in a trailing direction from the main magnetic pole; and a field generation layer (FGL) positioned, at the ABS, between the main magnetic pole and the trailing shield, wherein either a portion of the main magnetic pole closer to the FGL or a portion of the trailing shield closer to the FGL is adapted to act as a spin polarization layer.

Abstract translation: 根据一个实施例的微波辅助磁记录（MAMR）头包括适于当电流施加到写入线圈时产生写入磁场的主磁极; 后挡板，位于空气轴承表面（ABS）处，沿着主磁极的拖尾方向; 以及位于主磁极和后屏蔽之间的ABS处的场产生层（FGL），其中主磁极的靠近FGL的一部分或靠近FGL的后屏蔽的一部分被适配 作为自旋极化层。

公开(公告)号：US08848317B2

公开(公告)日：2014-09-30

申请号：US13725593

申请日：2012-12-21

Applicant: HGST Netherlands B.V.

Inventor： Masato Shiimoto ,  Ikuya Tagawa ,  Yasutaka Nishida ,  Hiroyuki Katada

IPC: G11B5/187 ,  G11B5/105 ,  G11B5/23

CPC classification number: G11B5/105 ,  G11B5/4886 ,  G11B2005/0024

Abstract: A magnetic disk drive system configured for shingled magnetic data recording wherein data tracks are recorded in an overlapping fashion on a magnetic media. The disk drive system includes magnetic write heads that are asymmetric so as to have increased writing at one side of the write head. The magnetic disk drive system includes magnetic write heads that are mirror images of one another so that write heads located at opposite surfaces of the magnetic media (e.g. one head facing up and one facing down) end up having preferential writing in the location relative to inner and outer diameters of the magnetic media.

Abstract translation: 一种磁盘驱动器系统，其配置用于带状磁数据记录，其中数据轨道以重叠的方式记录在磁性介质上。 磁盘驱动器系统包括不对称的磁性写入头，以便在写入头的一侧具有增加的写入。 磁盘驱动系统包括作为彼此的镜像的磁性写入头，使得位于磁性介质的相对表面上的写入头（例如，一个头部朝上且面向下的一个）最终在相对于内部的位置具有优先写入 和磁性介质的外径。

公开(公告)号：US20140133048A1

公开(公告)日：2014-05-15

申请号：US13675796

申请日：2012-11-13

Applicant: HGST NETHERLANDS B.V.

Inventor： Masato Shiimoto ,  Keiichi Nagasaka ,  Masukazu Igarashi

IPC: G11B5/127 ,  G11B5/31 ,  G11B21/02

CPC classification number: G11B5/127 ,  G11B5/1278 ,  G11B5/313 ,  G11B5/314 ,  G11B21/02 ,  G11B2005/0024

Abstract: In one embodiment, a MAMR head includes a main magnetic pole, a STO positioned near the main magnetic pole, the STO including a first perpendicular magnetic layer positioned above the main magnetic pole, wherein the first perpendicular magnetic layer is a first spin polarization layer having an axis of magnetic anisotropy in a direction perpendicular to a film surface, a first non-magnetic transmission layer positioned above the first perpendicular magnetic layer, a magnetic layer effectively having a plane of easy magnetization in the film surface positioned above the first non-magnetic transmission layer, the magnetic layer being a FGL, a second non-magnetic transmission layer positioned above the magnetic layer, and a second perpendicular magnetic layer positioned above the second non-magnetic transmission layer, wherein the second perpendicular magnetic layer is a second spin polarization layer having magnetic anisotropy in the direction perpendicular to the film plane.

Abstract translation: 在一个实施例中，MAMR头包括主磁极，位于主磁极附近的STO，STO包括位于主磁极上方的第一垂直磁性层，其中第一垂直磁性层是具有第一自旋极化层的第一自旋极化层， 在垂直于膜表面的方向上的磁各向异性轴，位于第一垂直磁性层上方的第一非磁性传输层，在第一非磁性层之上的膜表面中有效地具有易磁化平面的磁性层 透光层，磁性层是FGL，位于磁性层上方的第二非磁性传输层和位于第二非磁性传输层之上的第二垂直磁性层，其中第二垂直磁性层是第二自旋极化 层在垂直于膜平面的方向上具有磁各向异性。

公开(公告)号：US08705206B1

公开(公告)日：2014-04-22

申请号：US13725354

申请日：2012-12-21

Applicant: HGST Netherlands B.V.

Inventor： Maki Maeda ,  Masato Shiimoto ,  Hiroyuki Katada

IPC: G11B5/187 ,  G11B5/23

CPC classification number: G11B5/23 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/3163 ,  G11B2005/0024

Abstract: A magnetic data storage system according to one embodiment includes a magnetic head adapted to record data according to a shingled magnetic recording (SMR) process. The magnetic head includes a main pole adapted to produce a writing magnetic field, a trailing shield positioned above a trailing side of the main pole, wherein a trailing gap is defined between the trailing shield and the main pole, and a spin torque oscillator (STO) positioned above a first trailing corner of the main pole at an STO-side of the main pole, wherein the trailing gap has a greater length in a film thickness direction near the STO-side of the main pole and a lesser length in the film thickness direction near a second trailing corner of the main pole opposite the first trailing corner in a track width direction of the main pole.

Abstract translation: 根据一个实施例的磁数据存储系统包括适于根据带状磁记录（SMR）处理记录数据的磁头。 磁头包括适于产生写入磁场的主极，位于主极的后侧上方的后屏蔽，其中在后屏蔽和主极之间限定后跟间隙，以及自旋扭矩振荡器（STO ），其位于主极的STO侧的主极的第一后角上方，其中后缘在主极的STO侧附近的膜厚方向上具有较大的长度，并且膜的较小长度 在主极的轨道宽度方向上与第一后角相对的主极的第二后角附近的厚度方向。

公开(公告)号：US09406322B2

公开(公告)日：2016-08-02

申请号：US14850984

申请日：2015-09-11

Applicant: HGST Netherlands B.V.

Inventor： Jun Aoyama ,  Masahiko Hatatani ,  Hiroyuki Katada ,  Masato Shiimoto

IPC: G11B5/39 ,  G11B5/11

CPC classification number: G11B5/3912 ,  G11B5/11 ,  G11B5/398

Abstract: Embodiments of the present invention generally include magnetoresistive heads, such as read heads, having a sensor structure and side shields disposed adjacent to the sensor structure. The distance between the side shields and the sensor structure increase in a direction from an ABS in the off-track direction. The magnetoresistive heads may include tapered surfaces on the side shields or sensor structure, or may include stepped surfaces on the side shields or sensor structure.

Abstract translation: 本发明的实施例通常包括诸如读取头的磁阻头，具有传感器结构和邻近传感器结构设置的侧面屏蔽。 侧挡板和传感器结构之间的距离在离开轨道方向的ABS方向上增加。 磁阻头可以包括在侧屏蔽或传感器结构上的锥形表面，或者可以包括侧屏蔽或传感器结构上的台阶表面。

公开(公告)号：US09378759B2

公开(公告)日：2016-06-28

申请号：US14548853

申请日：2014-11-20

Applicant: HGST Netherlands B.V.

Inventor： Keiichi Nagasaka ,  Yo Sato ,  Masashige Sato ,  Susumu Okamura ,  Masato Shiimoto ,  Masukazu Igarashi

IPC: G11B5/31 ,  G11B5/35 ,  G11B5/00

CPC classification number: G11B5/35 ,  G11B5/314 ,  G11B5/607 ,  G11B2005/0024

Abstract: Embodiments disclosed herein generally relate to a magnetic disk device employing a MAMR head. The MAMR head includes an STO. The STO comprises an underlayer, an SPL, an interlayer, an FGL, and a capping layer. The SPL is comprised of a high perpendicular magnetic anisotropy material. The SPL has a large effective perpendicular magnetic anisotropy field, and the SPL has a lower magnetic moment than the FGL. An applied current is adapted to flow in a direction from the FGL to the SPL resulting in the magnetization direction of the SPL being almost perpendicular to the FGL and anti-parallel to a head-gap magnetic field due to a relation between a first spin torque directed from the SPL to the FGL and a second spin torque directed from the FGL to the SPL.

Abstract translation: 本文公开的实施例通常涉及采用MAMR头的磁盘装置。 MAMR头包括STO。 STO包括底层，SPL，中间层，FGL和覆盖层。 SPL由高垂直磁各向异性材料组成。 SPL具有大的有效垂直磁各向异性场，SPL具有比FGL低的磁矩。 施加的电流适于沿着从FGL到SPL的方向流动，导致SPL的磁化方向几乎垂直于FGL，并且由于第一自旋转矩之间的关系而与头间隙磁场反平行 从SPL引导到FGL，以及从FGL指向SPL的第二自旋扭矩。