公开(公告)号：US11848034B2

公开(公告)日：2023-12-19

申请号：US17541794

申请日：2021-12-03

Applicant: Western Digital Technologies, Inc.

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

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

CPC classification number: G11B5/3113 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3146 ,  G11B5/3912

Abstract: 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.

公开(公告)号：US09928856B2

公开(公告)日：2018-03-27

申请号：US15130442

申请日：2016-04-15

Applicant: International Business Machines Corporation

Inventor： Richard Lionel Bradshaw ,  Icko Eric Timothy Iben ,  Wayne Alan McKinley ,  Lee Curtis Randall

IPC: G11B5/255 ,  G11B5/008 ,  G11B5/31 ,  G11B5/40 ,  G11B5/41 ,  G11B23/00

CPC classification number: G11B5/255 ,  G11B5/00821 ,  G11B5/3106 ,  G11B5/3113 ,  G11B5/40 ,  G11B5/41 ,  G11B23/0071

Abstract: A magnetic storage system according to one embodiment includes a magnetic head having a removable organic coating thereon in an amount sufficient for reducing exposure of the head to oxidation promoting materials. The system also includes an applicator in a drive in which the magnetic head resides, the applicator being configured to apply the organic coating directly to the magnetic head without contacting the magnetic head. At least one guide is configured to create a spacing between the magnetic head and the guide, wherein the spacing is sufficient to insert the applicator into the spacing.

公开(公告)号：US08446692B2

公开(公告)日：2013-05-21

申请号：US13199188

申请日：2011-08-22

Applicant: Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

Inventor： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

IPC: G11B5/127 ,  G11B5/147

CPC classification number: G11B5/3113 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/3146 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044

Abstract: A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material that is in an anti-ferromagnetic (AFM) state during non-writing and switches to a ferromagnetic (FM) state by heating during writing. The main pole layer including the write pole may be comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged in an alternating manner. The AFM-FM phase change material is preferably a FeRh, FeRhPt, FeRhPd, or FeRhIr and may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times.

Abstract translation: 公开了一种PMR写入器，其在非写入期间最小化磁极擦除并且在写入期间通过在非写入期间处于反铁磁（AFM）状态的AFM-FM相变材料中的写入磁场最大化并切换到铁磁（FM） 在写作期间加热状态。 包括写极的主极层可以由具有多个“n”个铁磁层和“n-1”个AFM-FM相变材料层的交替排列的层压结构构成。 AFM-FM相变材料优选为FeRh，FeRhPt，FeRhPd或FeRhIr，并且还可以用作磁通门以防止磁轭焊剂泄漏到写极尖端。 AFM到FM转换的加热由位于AFM-FM相变材料附近的写入线圈和/或线圈提供，以实现更快的转换时间。

公开(公告)号：US08320077B1

公开(公告)日：2012-11-27

申请号：US12334753

申请日：2008-12-15

Applicant: Yunjun Tang ,  Yun-Fei Li ,  Yingjian Chen

Inventor： Yunjun Tang ,  Yun-Fei Li ,  Yingjian Chen

IPC: G11B5/127 ,  G11B5/147 ,  G11B5/31

CPC classification number: G11B5/147 ,  G11B5/1278 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3146

Abstract: A method and system for providing a high moment film are disclosed. The high moment film might be used in structures, such as a pole, of a magnetic transducer. The method and system includes providing a plurality of high moment layers and at least one soft magnetic layer interleaved with and ferromagnetically coupled with the plurality of high moment layers. Each of the plurality of high moment layers has a magnetic moment of greater than 2.4 Tesla. The at least one soft magnetic layer has a hard axis coercivity of not more than twenty Oersted. The high moment film has a total thickness of at least one thousand Angstroms.

Abstract translation: 公开了一种用于提供高力矩薄膜的方法和系统。 高力矩胶片可用于磁性传感器的结构，如磁极。 该方法和系统包括提供多个高力矩层和至少一个与多个高力矩层交织并且与磁化耦合的软磁层。 多个高力矩层中的每一个具有大于2.4特斯拉的磁矩。 所述至少一个软磁性层具有不超过二十奥斯特的硬轴矫顽力。 高力矩薄膜的总厚度至少为一千埃。

公开(公告)号：US08318242B2

公开(公告)日：2012-11-27

申请号：US12115449

申请日：2008-05-05

Applicant: Richard Lionel Bradshaw ,  Icko E. Tim Iben ,  Wayne Alan McKinley ,  Lee Curtis Randall

Inventor： Richard Lionel Bradshaw ,  Icko E. Tim Iben ,  Wayne Alan McKinley ,  Lee Curtis Randall

IPC: B05D5/12

CPC classification number: G11B5/255 ,  G11B5/00821 ,  G11B5/3106 ,  G11B5/3113 ,  G11B5/40 ,  G11B5/41 ,  G11B23/0071

Abstract: A method in one embodiment includes applying an organic coating to a magnetic head for reducing exposure of the head to oxidation promoting materials; and storing the magnetic head. A method in another embodiment includes applying an organic coating to a magnetic head for reducing exposure of the head to oxidation promoting materials, the organic coating being applied to the magnetic head after the head is installed in the magnetic storage system. Another method includes fabricating a tape having an applicator portion for applying an organic coating to a magnetic head for reducing exposure of the head to oxidation promoting materials; applying the organic coating to the applicator portion of the tape; and applying a lubricant to a data portion of the tape. A method in another embodiment includes fabricating a tape having a data portion, and a cleaning portion for removing an organic coating from a magnetic head.

Abstract translation: 一个实施方案中的方法包括将有机涂层施加到磁头以减少头部对氧化促进材料的暴露; 并存储磁头。 在另一个实施方案中的方法包括将有机涂层施加到磁头以减少头部对氧化促进材料的暴露，该有机涂层在磁头安装在磁存储系统中之后被施加到磁头。 另一种方法包括制造具有用于将有机涂层施加到磁头的涂敷部分以减少头部暴露于氧化促进材料的胶带; 将有机涂层施加到胶带的涂抹部分上; 以及向所述带的数据部分施加润滑剂。 另一实施例中的方法包括制造具有数据部分的带和用于从磁头去除有机涂层的清洁部分。

公开(公告)号：US20110308074A1

公开(公告)日：2011-12-22

申请号：US13199179

申请日：2011-08-22

Applicant: Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

Inventor： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

IPC: G11B5/127

CPC classification number: G11B5/3113 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/3146 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044

Abstract: A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material that is in an AFM state during non-writing and switches to a FM state by heating during writing. The main pole layer including the write pole may be comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged in an alternating manner. The AFM-FM phase change material is preferably a FeRh or FeRhX alloy (X=Pt, Pd, or Ir) having a Rh content>35 atomic %. AFM-FM phase change material may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times.

Abstract translation: 公开了一种PMR写入器，其在非写入期间最小化磁极擦除，并且通过在非写入期间处于AFM状态的AFM-FM相变材料的写入期间写入字段最大化并且在写入期间通过加热切换到FM状态。 包括写极的主极层可以由具有多个“n”个铁磁层和“n-1”个AFM-FM相变材料层的交替排列的层压结构构成。 AFM-FM相变材料优选为Rh含量> 35原子％的FeRh或FeRhX合金（X = Pt，Pd或Ir）。 AFM-FM相变材料也可以用作磁通门，以防止磁轭磁通泄漏到写极尖端。 AFM到FM转换的加热由位于AFM-FM相变材料附近的写入线圈和/或线圈提供，以实现更快的转换时间。

公开(公告)号：US08023227B2

公开(公告)日：2011-09-20

申请号：US11710079

申请日：2007-02-23

Applicant: Peng Luo ,  Shuyu Sun ,  Chaoyuan Chen

Inventor： Peng Luo ,  Shuyu Sun ,  Chaoyuan Chen

IPC: G11B5/127

CPC classification number: G11B5/1278 ,  G11B5/3113 ,  G11B5/3116

Abstract: Disclosed is a perpendicular recording head for a hard disk drive. The perpendicular recording head includes a yoke that has a plurality of grooves essentially perpendicular to a magnetic flux that flows in a vertical direction relative to the yoke. The perpendicular grooves inhibit residual magnetism in the vertical direction and enhance yoke domain stability.

Abstract translation: 公开了用于硬盘驱动器的垂直记录头。 垂直记录头包括具有基本上垂直于相对于磁轭在垂直方向上流动的磁通的多个凹槽的磁轭。 垂直槽在垂直方向上抑制剩余磁性，并增强轭结构域的稳定性。

公开(公告)号：US08004794B2

公开(公告)日：2011-08-23

申请号：US11894494

申请日：2007-08-21

Applicant: Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

Inventor： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

IPC: G11B5/127 ,  G11B5/147

CPC classification number: G11B5/3113 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/3146 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044

Abstract: A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material that is in an AFM state during non-writing and switches to a FM state by heating during writing. The main pole layer including the write pole may be comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged in an alternating manner. The AFM-FM phase change material is preferably a FeRh or FeRhX alloy (X=Pt, Pd, or Ir) having a Rh content >35 atomic %. AFM-FM phase change material may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times.

Abstract translation: 公开了一种PMR写入器，其在非写入期间最小化磁极擦除，并且通过在非写入期间处于AFM状态的AFM-FM相变材料的写入期间写入字段最大化并且在写入期间通过加热切换到FM状态。 包括写极的主极层可以由具有多个“n”个铁磁层和“n-1”个AFM-FM相变材料层的交替排列的层压结构构成。 AFM-FM相变材料优选为Rh含量> 35原子％的FeRh或FeRhX合金（X = Pt，Pd或Ir）。 AFM-FM相变材料也可以用作磁通门，以防止磁轭磁通泄漏到写极尖端。 AFM到FM转换的加热由位于AFM-FM相变材料附近的写入线圈和/或线圈提供，以实现更快的转换时间。

公开(公告)号：US07889457B2

公开(公告)日：2011-02-15

申请号：US11611473

申请日：2006-12-15

Applicant: Hisayuki Yazawa ,  Toshinori Watanabe

Inventor： Hisayuki Yazawa ,  Toshinori Watanabe

IPC: G11B5/147 ,  G11B5/187

CPC classification number: G11B5/3163 ,  G11B5/1278 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/3146

Abstract: There is provided a perpendicular magnetic recording head device which can increase magnetic field gradient to exhibit excellent recording performance while maintaining magnetic field intensity capable of performing information recording well. In a perpendicular magnetic recording head device composed of a main magnetic pole layer and a return path layer which are laminated with a nonmagnetic insulating layer therebetween, the return path layer has a two-layer structure composed of a low saturation magnetic flux density layer (low Bs layer), and a high saturation magnetic flux density layer (high Bs layer) formed an the low Bs layer and made of a material that has a relatively high saturation magnetic flux density. In a front end surface of the return path layer, the low Bs layer and the high Bs layer are exposed.

Abstract translation: 提供了一种垂直磁记录头装置，其可以增加磁场梯度以表现出优异的记录性能，同时保持能够良好地执行信息记录的磁场强度。 在由主磁极层和返回路径层构成的​​垂直磁记录头装置之间层叠有非磁性绝缘层，返回路径层具有由低饱和磁通密度层（低 Bs层）和高饱和磁通密度层（高Bs层）形成低B层，并由具有相对较高饱和磁通密度的材料制成。 在返回路径层的前端表面中露出低Bs层和高Bs层。

公开(公告)号：US07508619B2

公开(公告)日：2009-03-24

申请号：US11880236

申请日：2007-07-20

Applicant: Hisao Okamoto ,  Hideki Zaitsu

Inventor： Hisao Okamoto ,  Hideki Zaitsu

IPC: G11B20/20 ,  G11B5/265

CPC classification number: G11B5/5547 ,  G11B5/012 ,  G11B5/1278 ,  G11B5/31 ,  G11B5/3113 ,  G11B5/3116

Abstract: Embodiments in accordance with present invention provide a magnetic head and a magnetic disc drive capable of preventing a side erase while providing excellent recording characteristics. According to one embodiment, in order to prevent the side erase in an increased skew angle state, a first magnetic pole surface is formed in such a shape that the projection area of the first magnetic pole surface follows a track edge positioned on the boundary side in the track in the state where the first magnetic pole surface is positioned on the track at the innermost periphery thereof included in a first region. Likewise, to prevent the side erase in the increased skew angle state, a second magnetic pole surface is formed in such a shape that the projection area of the second magnetic pole surface follows a track edge positioned on the boundary side with respect to a track in the state where the second magnetic pole surface is positioned on the track at the outermost periphery thereof included in a second region.

Abstract translation: 根据本发明的实施例提供一种磁头和磁盘驱动器，其能够在提供优异的记录特性的同时防止侧面擦除。 根据一个实施例，为了防止在增加的倾斜角状态下的侧面擦除，第一磁极表面形成为使得第一磁极表面的投影区域沿着位于边界侧上的轨道边缘的形状 第一磁极表面位于包括在第一区域中的最内周边的轨道上的轨迹。 类似地，为了防止在增加的倾斜角状态下的侧面擦除，第二磁极表面形成为使得第二磁极表面的投影区域相对于轨道的轨迹位于边界侧上的轨道边缘 第二磁极表面位于包括在第二区域中的最外周的轨道上的状态。