公开(公告)号：US08542461B2

公开(公告)日：2013-09-24

申请号：US12806803

申请日：2010-08-20

申请人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

发明人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

IPC分类号： G11B5/147 ,  G11B5/187

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3146

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a configuration of leading edge shields and trailing edge shields that reduce the leakage of flux between the main pole and the shields. The reduction of leakage is achieved by eliminating the sharp 90° corner between the backside surfaces of the shields and the surfaces adjacent to the main pole. In one embodiment the corner is replaced by two successive acute angles, in another embodiment it is replaced by a rounded surface. In a final embodiment, leakage between the pole and trailing edge shield is achieved by shortening the length of the write gap by forming the shield with a double taper.

摘要翻译： 垂直磁记录（PMR）头被制造成具有前缘屏蔽和后缘屏蔽的结构，其减小主极和屏蔽之间的通量泄漏。 通过消除屏蔽的背面和与主极相邻的表面之间的尖锐的90°角来实现泄漏的减少。 在一个实施例中，角部被两个连续的锐角取代，在另一个实施例中，它被圆形表面所代替。 在最终实施例中，通过用双锥形形成屏蔽来缩短写入间隙的长度来实现极和后缘屏蔽之间的泄漏。

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.

公开(公告)号：US20110097602A1

公开(公告)日：2011-04-28

申请号：US12589598

申请日：2009-10-26

申请人： Zhigang Bai ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek ,  Yan Wu

发明人： Zhigang Bai ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek ,  Yan Wu

IPC分类号： G11B5/33 ,  B44C1/22

CPC分类号： G11B5/1278 ,  G11B5/315 ,  G11B5/6011 ,  Y10T428/1171

摘要： An improved magnetic shield for a perpendicular magnetic write head is disclosed. Its main feature is a pair of tabs at the shield's bottom corners. Said tabs are significantly wider at their point of attachment to the shield than further away from the shield. The end portions of each tab slope upwards (away from the ABS) at an angle of about ten degrees. A process for manufacturing the shield is also disclosed.

摘要翻译： 公开了用于垂直磁写头的改进的磁屏蔽。 它的主要特征是盾牌底角上的一对标签。 所述突片在其远离屏蔽件的位置处与屏蔽件的连接点明显更宽。 每个翼片的端部以大约十度的角度向上（远离ABS）倾斜。 还公开了一种用于制造屏蔽的工艺。

公开(公告)号：US20130003226A1

公开(公告)日：2013-01-03

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： G11B5/127 ,  G11B5/147

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。

公开(公告)号：US20130001190A1

公开(公告)日：2013-01-03

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

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 which creates an efficient channeling of magnetic flux to the pole tip. 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 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.

摘要翻译： 垂直磁记录（PMR）头由多级锥形写极制造，其产生磁极到磁极尖端的有效沟道。 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，使写极为阶梯轮廓。 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。 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。

公开(公告)号：US08264792B2

公开(公告)日：2012-09-11

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： G11B5/31

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 for efficient channeling of magnetic flux. 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 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.

摘要翻译： 垂直磁记录（PMR）头由多级锥形写极制造，用于磁通的高效通道。 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在极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。

公开(公告)号：US08125732B2

公开(公告)日：2012-02-28

申请号：US12583753

申请日：2009-08-25

申请人： Zhigang Bai ,  Yan Wu ,  Moris Dovek

发明人： Zhigang Bai ,  Yan Wu ,  Moris Dovek

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/3116

摘要： A main pole layer with a tapered trailing side is disclosed that has three sections each with a write pole portion along the ABS and a yoke portion. A lower section has a bottom surface including a leading edge at the write pole tip and sidewalls with a bevel angle between 4 and 20 degrees. The middle section has essentially vertical sidewalls with a tapered side starting at the trailing edge and extending to a back side of the write pole and into the yoke. An upper section includes a portion of the tapered side and a top surface of the main pole layer and has a sidewall with a bevel angle from 0 to 45 degrees. The thickness of the middle section is greater than the pole height variation caused by variations in back end processes including ion milling and lapping to reduce erase width (EW) variations.

摘要翻译： 公开了具有锥形后缘的主极层，其具有三个部分，每个部分具有沿ABS的写极部分和轭部分。 下部具有底表面，该底表面包括位于写入极尖端的前缘和具有4至20度之间的斜角的侧壁。 中间部分具有基本上垂直的侧壁，其具有从后缘开始并延伸到写入极的后侧并进入轭的渐缩侧。 上部包括锥形侧的一部分和主极层的顶表面，并且具有具有0至45度的斜角的侧壁。 中间部分的厚度大于由后端工艺变化引起的极高度变化，包括离子铣削和研磨以减少擦除宽度（EW）变化。

公开(公告)号：US08105705B2

公开(公告)日：2012-01-31

申请号：US12589598

申请日：2009-10-26

申请人： Zhigang Bai ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek ,  Yan Wu

发明人： Zhigang Bai ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek ,  Yan Wu

IPC分类号： G11B5/127 ,  G11B5/858

CPC分类号： G11B5/1278 ,  G11B5/315 ,  G11B5/6011 ,  Y10T428/1171

摘要： An improved magnetic shield for a perpendicular magnetic write head is disclosed. Its main feature is a pair of tabs at the shield's bottom corners. Said tabs are significantly wider at their point of attachment to the shield than further away from the shield. The end portions of each tab slope upwards (away from the ABS) at an angle of about ten degrees. A process for manufacturing the shield is also disclosed.

摘要翻译： 公开了用于垂直磁写头的改进的磁屏蔽。 它的主要特征是盾牌底角上的一对标签。 所述突片在其远离屏蔽件的位置处与屏蔽件的连接点明显更宽。 每个翼片的端部以大约十度的角度向上（远离ABS）倾斜。 还公开了一种用于制造屏蔽的工艺。

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。

公开(公告)号：US20120044598A1

公开(公告)日：2012-02-23

申请号：US12806803

申请日：2010-08-20

申请人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

发明人： Zhigang Bai ,  Moris Dovek ,  Yan Wu

IPC分类号： G11B5/17

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3146

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a configuration of leading edge shields and trailing edge shields that reduce the leakage of flux between the main pole and the shields. The reduction of leakage is achieved by eliminating the sharp 90° corner between the backside surfaces of the shields and the surfaces adjacent to the main pole. In one embodiment the corner is replaced by two successive acute angles, in another embodiment it is replaced by a rounded surface. In a final embodiment, leakage between the pole and trailing edge shield is achieved by shortening the length of the write gap by forming the shield with a double taper.

摘要翻译： 垂直磁记录（PMR）头被制造成具有前缘屏蔽和后缘屏蔽的结构，其减小主极和屏蔽之间的通量泄漏。 通过消除屏蔽的背面和与主极相邻的表面之间的尖锐的90°角来实现泄漏的减少。 在一个实施例中，角部被两个连续的锐角取代，在另一个实施例中，它被圆形表面所代替。 在最终实施例中，通过用双锥形形成屏蔽来缩短写入间隙的长度来实现极和后缘屏蔽之间的泄漏。