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1. 发明授权

US07385789B2 Magnetostrictive actuator in a magnetic head 失效
标题翻译：磁头中的磁致伸缩致动器
公开(公告)号：US07385789B2
公开(公告)日：2008-06-10
申请号：US10835787
申请日：2004-04-30
申请人： David Hu , Moris Dovek , Kowang Liu
发明人： David Hu , Moris Dovek , Kowang Liu
IPC分类号： G11B21/21 , G11B5/56 , G11B5/58
CPC分类号： G11B5/56 , G11B5/5552 , G11B5/58
摘要： In order to obtain improved magnetic track density, it is desirable to bring the read and write elements as close to the recording surface as possible, short of actually touching it. This has been achieved by utilizing a magnetostrictive actuator, comprising single or multiple pairs of magnetostrictive elements and their associated conductor coils. A magnetic field is generated by passing electrical current through the conductor coils. This field will saturate the actuator and cause the magnetostrictive elements to contract or expand, thus moving the read/write element whenever so desired.
摘要翻译：为了获得改善的磁道密度，期望使读取和写入元件尽可能靠近记录表面，而不是实际接触它。这已经通过利用包括单对或多对磁致伸缩元件及其相关联的导体线圈的磁致伸缩致动器来实现。通过使电流通过导体线圈产生磁场。该场将使致动器饱和并导致磁致伸缩元件收缩或膨胀，从而在需要时移动读/写元件。

2. 发明申请

US20050243473A1 Magnetostrictive actuator in a magnetic head 失效
标题翻译：磁头中的磁致伸缩致动器
公开(公告)号：US20050243473A1
公开(公告)日：2005-11-03
申请号：US10835787
申请日：2004-04-30
申请人： David Hu , Moris Dovek , Kowang Liu
发明人： David Hu , Moris Dovek , Kowang Liu
IPC分类号： G11B5/60 , G11B5/55 , G11B5/56 , G11B5/58
CPC分类号： G11B5/56 , G11B5/5552 , G11B5/58
摘要： In order to obtain improved magnetic track density, it is desirable to bring the read and write elements as close to the recording surface as possible, short of actually touching it. This has been achieved by utilizing a magnetostrictive actuator, comprising single or multiple pairs of magnetostrictive elements and their associated conductor coils. A magnetic field is generated by passing electrical current through the conductor coils. This field will saturate the actuator and cause the magnetostrictive elements to contract or expand, thus moving the read/write element whenever so desired.
摘要翻译：为了获得改善的磁道密度，期望使读取和写入元件尽可能靠近记录表面，而不是实际接触它。这已经通过利用包括单对或多对磁致伸缩元件及其相关联的导体线圈的磁致伸缩致动器来实现。通过使电流通过导体线圈产生磁场。该场将使致动器饱和并导致磁致伸缩元件收缩或膨胀，从而在需要时移动读/写元件。

3. 发明申请

US20120087042A1 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：US20120087042A1
公开(公告)日：2012-04-12
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： G11B5/147 , G11B5/60
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 antiferromagnetic (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相变材料中写入期间最大化写入场并且通过以下方式切换到铁磁（FM）状态：书写过程中加热。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

US08085498B2 PMR write with flux choking area 有权
公开(公告)号：US08085498B2
公开(公告)日：2011-12-27
申请号：US12586249
申请日：2009-09-17
申请人： Zhigang Bai , Yue Liu , Kowang Liu , Yan Wu , Moris Dovek
发明人： Zhigang Bai , Yue Liu , Kowang Liu , Yan Wu , Moris Dovek
IPC分类号： G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/3163
摘要： A PMR writer having a trailing shield structure is disclosed in which a flux choking layer (FCL) formed adjacent to the ABS provides a means to limit the amount of flux flowing from the trailing shield to a first write shield (WS1) near the write pole tip thereby significantly reducing adjacent track erasure. The FCL has a substantially smaller thickness than a top section of the trailing shield to which it is attached along a side opposite the ABS. As a result, pole tip protrusion is reduced compared to prior art PMR writers. The FCL contacts a trailing side of WS1 at the ABS and one or both of the trailing sides of the WS1 and FCL may be tapered or perpendicular with respect to the ABS. The top trailing shield section, FCL, and WS1 may be comprised of NiFe, CoFe, CoFeNi, or alloys thereof.

5. 发明申请

US20110063755A1 PMR write with flux choking area 有权
标题翻译： PMR写入焊剂阻塞区域
公开(公告)号：US20110063755A1
公开(公告)日：2011-03-17
申请号：US12586249
申请日：2009-09-17
申请人： Zhigang Bai , Yue Liu , Kowang Liu , Yan Wu , Moris Dovek
发明人： Zhigang Bai , Yue Liu , Kowang Liu , Yan Wu , Moris Dovek
IPC分类号： G11B5/10 , G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/3163
摘要： A PMR writer having a trailing shield structure is disclosed in which a flux choking layer (FCL) formed adjacent to the ABS provides a means to limit the amount of flux flowing from the trailing shield to a first write shield (WS1) near the write pole tip thereby significantly reducing adjacent track erasure. The FCL has a substantially smaller thickness than a top section of the trailing shield to which it is attached along a side opposite the ABS. As a result, pole tip protrusion is reduced compared to prior art PMR writers. The FCL contacts a trailing side of WS1 at the ABS and one or both of the trailing sides of the WS1 and FCL may be tapered or perpendicular with respect to the ABS. The top trailing shield section, FCL, and WS1 may be comprised of NiFe, CoFe, CoFeNi, or alloys thereof.
摘要翻译：公开了具有拖尾屏蔽结构的PMR写入器，其中与ABS相邻形成的通量阻塞层（FCL）提供了一种将从后屏蔽流过的磁通量限制在写极附近的第一写屏蔽（WS1）的装置从而显着地减少相邻轨道擦除。 FCL具有比尾部护罩的顶部部分基本上小的厚度，其沿着与ABS相对的一侧被附接到该顶部部分。结果，与现有技术的PMR写入器相比，极尖突起减小。 FCL在ABS处接触WS1的后侧，并且WS1和FCL的一个或两个后侧可以相对于ABS呈锥形或垂直。顶部后屏蔽部分FCL和WS1可以由NiFe，CoFe，CoFeNi或其合金组成。

6. 发明申请

US20090052092A1 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：US20090052092A1
公开(公告)日：2009-02-26
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： G11B5/33
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. 发明申请

US20100277832A1 PMR writer device with multi-level tapered write pole 有权
标题翻译： PMR写入器，具有多级锥形写入极
公开(公告)号：US20100277832A1
公开(公告)日：2010-11-04
申请号：US12387534
申请日：2009-05-04
申请人： Zhigang Bai , Kowang Liu , Yan Wu , Moris Dovek
发明人： Zhigang Bai , Kowang Liu , Yan Wu , Moris Dovek
IPC分类号： G11B5/127
CPC分类号： G11B5/398 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163 , G11B5/3183 , G11B5/3186 , Y10T29/49032 , Y10T29/49041 , Y10T29/49044 , Y10T29/49048
摘要： A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole. The write pole comprises a main pole with a tapered tip on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the tapered tip, giving the write pole a stepped profile. The tapered tip can be two sloped surfaces that are symmetric about a mid plane of the main pole or the taper can be a single sloped edge on the leading side or the trailing side of the pole. The yoke structure can consist of a single yoke formed on one side of the main pole or it can consist of two yokes formed symmetrically on both the leading and trailing sides of the main pole. Other yoke/pole combinations are also described as are various shield formations. The write pole structure creates an efficient channeling of magnetic flux to the ABS surface of the pole tip which produces magnetic recording field at high area densities.
摘要翻译：垂直磁记录（PMR）头用多级锥形写柱制造。写入极包括具有锥形尖端的主极，其上形成有至少一个具有锥形边缘的轭。轭的边缘从锥形尖端的ABS凹入，给写极一个阶梯轮廓。锥形尖端可以是关于主极的中间平面对称的两个倾斜表面，或者锥形可以是在杆的前侧或后侧的单个倾斜边缘。轭结构可以由形成在主极的一侧上的单个磁轭组成，或者可以由在主极的前后两侧对称地形成的两个磁轭组成。其他轭/杆组合也被描述为各种盾构形式。写磁极结构产生磁通量到磁极尖端的ABS表面的有效的通道，其产生高区域密度的磁记录场。

8. 发明授权

US09105287B2 Method of forming a PMR writer device with multi-level tapered write pole 有权
标题翻译：用多级锥形写柱形成PMR写入器的方法
公开(公告)号：US09105287B2
公开(公告)日：2015-08-11
申请号：US13608308
申请日：2012-09-10
申请人： Zhigang Bai , Kowang Liu , Yan Wu , Moris Dovek
发明人： Zhigang Bai , Kowang Liu , Yan Wu , Moris Dovek
IPC分类号： G11B5/127 , G11B5/31 , G11B5/39
CPC分类号： G11B5/398 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163 , G11B5/3183 , G11B5/3186 , Y10T29/49032 , Y10T29/49041 , Y10T29/49044 , Y10T29/49048
摘要： A method of fabricating a perpendicular magnetic recording (PMR) head with a multi-level tapered write pole which creates an efficient channeling of magnetic flux to the pole tip. A tapered bottom yoke is first formed in an etched substrate and a write pole is formed on the tapered bottom yoke. The write pole comprises a main pole with a tapered tip. A tapered top yoke is then formed on the write pole and symmetrically positioned relative to the bottom yoke. The edge of each yoke is recessed from the ABS of the tapered tip, giving the write pole a stepped profile. The tapered tip can be two sloped surfaces that are symmetric about a mid-plane of the main pole or a single sloped edge on the leading side or the trailing side of the pole.
摘要翻译：一种制造具有多级锥形写磁极的垂直磁记录（PMR）磁头的方法，其产生磁极到极尖的有效沟道。首先在蚀刻的衬底中形成锥形底部磁轭，并且在锥形底部磁轭上形成写入磁极。写入极包括具有锥形尖端的主极。然后，锥形顶部磁轭形成在写入磁极上并相对于底部磁轭对称地定位。每个轭的边缘从锥形尖端的ABS凹入，给写极一个阶梯轮廓。锥形尖端可以是关于主极的中间平面对称的两个倾斜表面或在极的前侧或后侧的单个倾斜边缘。

9. 发明授权

US08881376B2 Method of manufacturing a perpendicular magnetic recording head laminated with AFM-FM phase change material 有权
标题翻译：制造用AFM-FM相变材料层叠的垂直磁记录头的方法
公开(公告)号：US08881376B2
公开(公告)日：2014-11-11
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 , G11B5/21 , G11B5/31 , 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 method of manufacturing a PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing by including an AFM-FM phase change material spacer 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 formed as a laminated structure by a sputter deposition process wherein a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers are laid down 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 %, and may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip.
摘要翻译：公开了一种制造PMR写入器的方法，其在非写入期间使磁极擦除最小化，并且在写入期间使写入场最大化，包括在非写入期间处于AFM状态的AFM-FM相变材料间隔物，并且通过书写过程中加热。包括写极的主极层可以通过溅射沉积工艺形成为层叠结构，其中以交替的方式放置多个“n”个铁磁层和“n-1”个AFM-FM相变材料层。 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），并且还可以用作磁通门以防止磁轭焊剂泄漏到写极点。

10. 发明授权

US08670212B2 PMR writer device with multi-level tapered write pole 有权
标题翻译： PMR写入器，具有多级锥形写入极
公开(公告)号：US08670212B2
公开(公告)日：2014-03-11
申请号：US13608321
申请日：2012-09-10
申请人： Zhigang Bai , Kowang Liu , Yan Wu , Moris Dovek
发明人： Zhigang Bai , Kowang Liu , Yan Wu , Moris Dovek
IPC分类号： G11B5/31
CPC分类号： G11B5/398 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163 , G11B5/3183 , G11B5/3186 , Y10T29/49032 , Y10T29/49041 , Y10T29/49044 , Y10T29/49048
摘要： A perpendicular magnetic recording (PMR) head is fabricated with a multi-level tapered write pole. The write pole comprises a main pole with a tapered tip on a leading edge or a trailing edge, on which is formed at least one yoke that has a tapered edge. The edge of the yoke is recessed from the ABS of the main pole, giving the head a stepped profile. The yoke can be a single yoke formed on one side of the main pole or it can be two yokes formed on both the leading and trailing sides of the main pole. The write pole structure creates an efficient channeling of magnetic flux to the ABS surface of the pole tip which produces magnetic recording field at high area densities.
摘要翻译：垂直磁记录（PMR）头用多级锥形写柱制造。写极包括在前缘或后缘具有锥形尖端的主极，在其上形成有至少一个具有锥形边缘的轭。轭的边缘从主极的ABS凹入，使头部呈阶梯状。轭可以是形成在主极的一侧上的单个磁轭，或者它可以是形成在主极的前侧和后侧的两个轭。写磁极结构产生磁通量到磁极尖端的ABS表面的有效的通道，其产生高区域密度的磁记录场。

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