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1. 发明授权

US11848034B2 Anti-parallel coupled writer shields with stable magnetic domain configuration 有权
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.

2. 发明授权

US09928856B2 Systems and methods for protecting a sensitive device from corrosion 有权
公开(公告)号：US09928856B2
公开(公告)日：2018-03-27
申请号：US15130442
申请日：2016-04-15
申请人： International Business Machines Corporation
发明人： Richard Lionel Bradshaw , Icko Eric Timothy Iben , Wayne Alan McKinley , Lee Curtis Randall
IPC分类号： G11B5/255 , G11B5/008 , G11B5/31 , G11B5/40 , G11B5/41 , G11B23/00
CPC分类号： G11B5/255 , G11B5/00821 , G11B5/3106 , G11B5/3113 , G11B5/40 , G11B5/41 , G11B23/0071
摘要： 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.

3. 发明授权

US08446692B2 Perpendicular magnetic recording head laminated with AFM-FM phase change material 有权
标题翻译：垂直磁记录头与AFM-FM相变材料层压
公开(公告)号：US08446692B2
公开(公告)日：2013-05-21
申请号：US13199188
申请日：2011-08-22
申请人： Yuchen Zhou , Kenichi Takano , Kowang Liu , Kunliang Zhang , Liejie Guan , Moris Dovek , Joe Smyth
发明人： Yuchen Zhou , Kenichi Takano , Kowang Liu , Kunliang Zhang , Liejie Guan , Moris Dovek , Joe Smyth
IPC分类号： G11B5/127 , G11B5/147
CPC分类号： G11B5/3113 , G11B5/1278 , G11B5/147 , G11B5/3146 , Y10T29/49032 , Y10T29/49034 , Y10T29/49043 , Y10T29/49044
摘要： 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.
摘要翻译：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。

4. 发明授权

US08320077B1 Method and system for providing a high moment film 有权
标题翻译：提供高力矩胶片的方法和系统
公开(公告)号：US08320077B1
公开(公告)日：2012-11-27
申请号：US12334753
申请日：2008-12-15
申请人： Yunjun Tang , Yun-Fei Li , Yingjian Chen
发明人： Yunjun Tang , Yun-Fei Li , Yingjian Chen
IPC分类号： G11B5/127 , G11B5/147 , G11B5/31
CPC分类号： G11B5/147 , G11B5/1278 , G11B5/3113 , G11B5/3116 , G11B5/3146
摘要： 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.
摘要翻译：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。

5. 发明授权

US08318242B2 Systems and methods for protecting a sensitive device from corrosion 失效
标题翻译：保护敏感器件免受腐蚀的系统和方法
公开(公告)号：US08318242B2
公开(公告)日：2012-11-27
申请号：US12115449
申请日：2008-05-05
申请人： Richard Lionel Bradshaw , Icko E. Tim Iben , Wayne Alan McKinley , Lee Curtis Randall
发明人： Richard Lionel Bradshaw , Icko E. Tim Iben , Wayne Alan McKinley , Lee Curtis Randall
IPC分类号： B05D5/12
CPC分类号： G11B5/255 , G11B5/00821 , G11B5/3106 , G11B5/3113 , G11B5/40 , G11B5/41 , G11B23/0071
摘要： 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.
摘要翻译：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。

6. 发明申请

US20110308074A1 Perpendicular magnetic recording head laminated with AFM-FM phase change material 有权
标题翻译：垂直磁记录头与AFM-FM相变材料层压
公开(公告)号：US20110308074A1
公开(公告)日：2011-12-22
申请号：US13199179
申请日：2011-08-22
申请人： Yuchen Zhou , Kenichi Takano , Kowang Liu , Kunliang Zhang , Liejie Guan , Moris Dovek , Joe Smyth
发明人： Yuchen Zhou , Kenichi Takano , Kowang Liu , Kunliang Zhang , Liejie Guan , Moris Dovek , Joe Smyth
IPC分类号： G11B5/127
CPC分类号： G11B5/3113 , G11B5/1278 , G11B5/147 , G11B5/3146 , Y10T29/49032 , Y10T29/49034 , Y10T29/49043 , Y10T29/49044
摘要： 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.
摘要翻译：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。

7. 发明授权

US08023227B2 Perpendicular recording head with a grooved yoke 失效
标题翻译：垂直记录头带有槽形轭
公开(公告)号：US08023227B2
公开(公告)日：2011-09-20
申请号：US11710079
申请日：2007-02-23
申请人： Peng Luo , Shuyu Sun , Chaoyuan Chen
发明人： Peng Luo , Shuyu Sun , Chaoyuan Chen
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/3113 , G11B5/3116
摘要： 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.
摘要翻译：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。

8. 发明授权

US08004794B2 Perpendicular magnetic recording head laminated with AFM-FM phase change material 有权
标题翻译：垂直磁记录头与AFM-FM相变材料层压
公开(公告)号：US08004794B2
公开(公告)日：2011-08-23
申请号：US11894494
申请日：2007-08-21
申请人： Yuchen Zhou , Kenichi Takano , Kowang Liu , Kunliang Zhang , Liejie Guan , Moris Dovek , Joe Smyth
发明人： Yuchen Zhou , Kenichi Takano , Kowang Liu , Kunliang Zhang , Liejie Guan , Moris Dovek , Joe Smyth
IPC分类号： G11B5/127 , G11B5/147
CPC分类号： G11B5/3113 , G11B5/1278 , G11B5/147 , G11B5/3146 , Y10T29/49032 , Y10T29/49034 , Y10T29/49043 , Y10T29/49044
摘要： 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.
摘要翻译：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。

9. 发明授权

US07889457B2 Perpendicular magnetic recording head device capable of increasing magnetic field gradient to exhibit excellent recording performance while maintaining magnetic field intensity 失效
标题翻译：垂直磁记录头装置，其能够增加磁场梯度以在保持磁场强度的同时表现出优异的记录性能
公开(公告)号：US07889457B2
公开(公告)日：2011-02-15
申请号：US11611473
申请日：2006-12-15
申请人： Hisayuki Yazawa , Toshinori Watanabe
发明人： Hisayuki Yazawa , Toshinori Watanabe
IPC分类号： G11B5/147 , G11B5/187
CPC分类号： G11B5/3163 , G11B5/1278 , G11B5/3113 , G11B5/3116 , G11B5/3146
摘要： 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.
摘要翻译：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。

10. 发明授权

US07508619B2 Magnetic head and magnetic disc drive 失效
标题翻译：磁头和磁盘驱动器
公开(公告)号：US07508619B2
公开(公告)日：2009-03-24
申请号：US11880236
申请日：2007-07-20
申请人： Hisao Okamoto , Hideki Zaitsu
发明人： Hisao Okamoto , Hideki Zaitsu
IPC分类号： G11B20/20 , G11B5/265
CPC分类号： G11B5/5547 , G11B5/012 , G11B5/1278 , G11B5/31 , G11B5/3113 , G11B5/3116
摘要： 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.
摘要翻译：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。

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