公开(公告)号：US20150109699A1

公开(公告)日：2015-04-23

申请号：US14060504

申请日：2013-10-22

Applicant: HGST Netherlands B.V.

Inventor： Carl Boone ,  Jianhua Li ,  Isao Nunokawa ,  Erhard Schreck ,  Mikito Sugiyama ,  Ikuya Tagawa ,  Yuta Udo

IPC: G11B5/40 ,  G11B5/127

CPC classification number: G11B5/3116 ,  G11B5/3136 ,  G11B5/3146 ,  G11B2005/0024 ,  Y10T29/49032

Abstract: In accordance with one embodiment, a magnetic head includes a main pole configured to emit a recording magnetic field for affecting a magnetic medium, spin torque oscillator (STO) device in electrical communication with and positioned above the main pole in a track direction, the STO device being configured to generate a high-frequency magnetic field which is superimposed with the recording magnetic field in order to record data to the magnetic medium when current flows to the STO device, and a heat sink positioned near the STO device, the heat sink being configured to reduce a temperature of the STO device when current flows to the STO device. In another embodiment, a method includes forming a heat sink behind a STO device in an element height direction perpendicular to a media facing surface, and/or on both sides of the STO device in a cross-track direction at the media facing surface.

Abstract translation: 根据一个实施例，磁头包括被配置为发射用于影响磁介质的记录磁场的主极，在轨道方向上与主极电连通并位于主极上方的自旋扭矩振荡器（STO）装置，STO 器件被配置为产生与记录磁场叠加的高频磁场，以便当电流流向STO器件时将数据记录到磁介质，以及位于STO器件附近的散热器，散热器 被配置为当电流流向STO装置时降低STO装置的温度。 在另一个实施例中，一种方法包括在垂直于介质相对表面的元件高度方向和/或在STO器件的两侧上在介质相对表面上沿交叉轨道方向形成STO器件后面的散热器。

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：US09355668B2

公开(公告)日：2016-05-31

申请号：US13899334

申请日：2013-05-21

Applicant: HGST Netherlands B.V.

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

IPC: G11B5/00 ,  G11B5/60

CPC classification number: G11B5/6076 ,  G11B2005/0024

Abstract: A hard-disk drive having a structurally efficient magnetic head slider utilizes a MAMR-based spin torque oscillator (STO) for head-disk contact detection and for flying height sensing. Contact detection and spacing estimation techniques consider the nominal temperature difference, and thus different criteria, between read and write operations.

Abstract translation: 具有结构有效的磁头滑块的硬盘驱动器利用基于MAMR的旋转扭矩振荡器（STO）来进行头盘接触检测和飞行高度感测。 接触检测和间隔估计技术考虑了读写操作之间的标称温差，因此考虑了不同的标准。

公开(公告)号：US08917465B1

公开(公告)日：2014-12-23

申请号：US14316628

申请日：2014-06-26

Applicant: HGST Netherlands B.V.

Inventor： John Contreras ,  Samir Y. Garzon ,  Ikuya Tagawa ,  Rehan Ahmed Zakai

IPC: G11B27/36

CPC classification number: G11B5/455 ,  G11B2005/0024

Abstract: A method, apparatus, and system are provided for implementing a power-on spin-torque oscillator (STO) oscillation checker to monitor STO resistance to identify STO oscillation with microwave assisted magnetic recording (MAMR) hard disk drives (HDDs). A changing bias current is applied to the STO in the presence of constant write drive current. The STO bias current is changed to observe sudden changes in STO resistance monitored using a differentiator circuit to identify STO oscillation, used to ensure stable MAMR HDD write operation.

Abstract translation: 提供了一种方法，装置和系统，用于实现上电自旋扭矩振荡器（STO）振荡检查器，以监测STO电阻以利用微波辅助磁记录（MAMR）硬盘驱动器（HDD）识别STO振荡。 在存在恒定写驱动电流的情况下，对STO施加变化的偏置电流。 改变STO偏置电流以观察使用微分电路监测的STO电阻的突然变化，以识别STO振荡，用于确保稳定的MAMR HDD写入操作。

公开(公告)号：US08570684B1

公开(公告)日：2013-10-29

申请号：US13646614

申请日：2012-10-05

Applicant: HGST Netherlands B.V.

Inventor： John Thomas Contreras ,  Ikuya Tagawa ,  Albert John Wallash

IPC: G11B5/127

CPC classification number: G11B5/02 ,  G11B2005/0024

Abstract: A method, apparatus, and system for implementing spin integrated spin-torque oscillator (STO) with an interface bias control for hard disk drives. Bias circuitry for a spin-torque oscillator (STO) is integrated with a slider for microwave assisted magnetic recording (MAMR). The slider includes read and write transducers and the integrated STO bias circuitry controls a bias potential applied to a write return pole to the write transducer with respect to a disk.

Abstract translation: 一种用于实现具有用于硬盘驱动器的接口偏置控制的自旋集成自旋扭矩振荡器（STO）的方法，装置和系统。 用于自旋扭矩振荡器（STO）的偏置电路与微波辅助磁记录滑块（MAMR）集成在一起。 滑动器包括读和写转换器，并且集成的STO偏置电路控制施加到相对于盘的写换能器的写入返回极的偏置电位。

公开(公告)号：US20140347969A1

公开(公告)日：2014-11-27

申请号：US13899334

申请日：2013-05-21

Applicant: HGST Netherlands B.V.

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

IPC: G11B5/60

CPC classification number: G11B5/6076 ,  G11B2005/0024

Abstract: A hard-disk drive having a structurally efficient magnetic head slider utilizes a MAMR-based spin torque oscillator (STO) for head-disk contact detection and for flying height sensing. Contact detection and spacing estimation techniques consider the nominal temperature difference, and thus different criteria, between read and write operations.

Abstract translation: 具有结构有效的磁头滑块的硬盘驱动器利用基于MAMR的旋转扭矩振荡器（STO）来进行头盘接触检测和飞行高度感测。 接触检测和间隔估计技术考虑了读写操作之间的标称温差，因此考虑了不同的标准。

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：US08995088B1

公开(公告)日：2015-03-31

申请号：US14060504

申请日：2013-10-22

Applicant: HGST Netherlands B.V.

Inventor： Carl Boone ,  Jianhua Li ,  Isao Nunokawa ,  Erhard Schreck ,  Mikito Sugiyama ,  Ikuya Tagawa ,  Yuta Udo

IPC: G11B5/127 ,  G11B5/40 ,  G11B5/00

CPC classification number: G11B5/3116 ,  G11B5/3136 ,  G11B5/3146 ,  G11B2005/0024 ,  Y10T29/49032

Abstract: In accordance with one embodiment, a magnetic head includes a main pole configured to emit a recording magnetic field for affecting a magnetic medium, a spin torque oscillator (STO) device in electrical communication with and positioned above the main pole in a track direction, the STO device being configured to generate a high-frequency magnetic field which is superimposed with the recording magnetic field in order to record data to the magnetic medium when current flows to the STO device, and a heat sink positioned near the STO device, the heat sink being configured to reduce a temperature of the STO device when current flows to the STO device. In another embodiment, a method includes forming a heat sink behind a STO device in an element height direction perpendicular to a media facing surface, and/or on both sides of the STO device in a cross-track direction at the media facing surface.

Abstract translation: 根据一个实施例，磁头包括被配置为发射用于影响磁介质的记录磁场的主极，在磁道方向上与主磁极电连通并位于主磁极上方的自旋扭矩振荡器（STO）装置， STO装置被配置为产生与记录磁场叠加的高频磁场，以便当电流流向STO装置时将数据记录到磁介质，以及位于STO装置附近的散热片，散热片 被配置为当电流流向STO装置时降低STO装置的温度。 在另一个实施例中，一种方法包括在垂直于介质相对表面的元件高度方向和/或在STO器件的两侧上在介质相对表面上沿交叉轨道方向形成STO器件后面的散热器。

公开(公告)号：US08553507B1

公开(公告)日：2013-10-08

申请号：US13675836

申请日：2012-11-13

Applicant: HGST Netherlands B.V.

Inventor： Ikuya Tagawa ,  Masaomi Ikeda

IPC: G11B11/00

CPC classification number: G11B5/314 ,  G11B2005/0024

Abstract: In one embodiment, a magnetic data storage system includes a magnetic disk medium, a microwave-assisted magnetic recording (MAMR) head including a main pole adapted for recording data to the magnetic disk medium having a first recording width, a spin torque oscillator (STO) adapted to apply a high-frequency magnetic field to the magnetic disk medium during a recording operation, wherein the STO is operable or inoperable when in an on or off state, respectively, wherein the main pole has a second recording width when the STO is in the on state, and the second recording width is different from the first recording width, a drive mechanism for passing the magnetic disk medium over the MAMR head, a read head including a magnetoresistance sensor, and a controller adapted for adjusting a shift quantity of the magnetic head depending on whether the STO is in the on or off state.

Abstract translation: 在一个实施例中，磁数据存储系统包括磁盘介质，包括适于向具有第一记录宽度的磁盘介质记录数据的主极的微波辅助磁记录（MAMR）头，自旋扭矩振荡器（STO ），其适于在记录操作期间将高频磁场施加到所述磁盘介质，其中所述STO分别在处于导通或关闭状态时可操作或不可操作，其中当所述STO为所述STO时，所述主极具有第二记录宽度 并且第二记录宽度不同于第一记录宽度，用于使磁盘介质通过MAMR磁头的驱动机构，包括磁阻传感器的读头，以及用于调整磁记录介质的位移量的控制器 磁头取决于STO是否处于开或关状态。