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11. 发明申请

US20090021868A1 Perpendicular magnetic recording head with a laminated pole 有权
标题翻译：带磁极的垂直磁记录头
公开(公告)号：US20090021868A1
公开(公告)日：2009-01-22
申请号：US11879952
申请日：2007-07-19
申请人： Kenichi Takano , Lijie Guan , Yuchen Zhou , Joe Smyth , Moris Dovek
发明人： Kenichi Takano , Lijie Guan , Yuchen Zhou , Joe Smyth , Moris Dovek
IPC分类号： G11B5/33 , G11B5/147 , B05D5/12
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/147 , G11B5/3143
摘要： A laminated write pole layer for a PMR write head is disclosed in which a plurality of “n” magnetic layers and “n−1” non-magnetic spacers are formed in an alternating fashion on a substrate. The non-magnetic spacers promote exchange decoupling or antiferromagnetic coupling between adjacent magnetic layers. Writability is improved when the trailing magnetic layer has a thickness greater than the thickness of other magnetic layers and preferably >25% of the total thickness of the magnetic layers. The thicknesses of the other magnetic layers may be equal or may become progressively smaller with increasing distance from the trailing magnetic layer. In another embodiment, the non-magnetic spacer between the trailing magnetic layer and the nearest magnetic layer is replaced by a magnetic spacer made of a soft magnetic material to promote magnetic coupling and effectively increase the thickness of the trailing magnetic layer.
摘要翻译：公开了一种用于PMR写入头的层叠写入极层，其中在衬底上以交替的方式形成多个“n”个磁性层和“n-1”个非磁性间隔物。非磁性间隔物促进相邻磁性层之间的交换去耦或反铁磁耦合。当后磁性层的厚度大于其它磁性层的厚度，优选磁性层的总厚度的25％时，写入性能得到改善。其他磁性层的厚度可以相等或随着与后磁性层的距离的增加而逐渐变小。在另一个实施例中，后磁性层和最近的磁性层之间的非磁性间隔物被由软磁材料制成的磁性隔离层代替，以促进磁耦合并有效地增加后磁层的厚度。

12. 发明授权

US08625234B2 Graded bevel tapered write pole design for field enhancement 有权
标题翻译：分级斜面锥形写柱设计用于场增强
公开(公告)号：US08625234B2
公开(公告)日：2014-01-07
申请号：US12150553
申请日：2008-04-29
申请人： Lijie Guan , Po-Kang Wang , Moris Dovek , Joe Smyth , Kenichi Takano , Yoshitaka Sasaki
发明人： Lijie Guan , Po-Kang Wang , Moris Dovek , Joe Smyth , Kenichi Takano , Yoshitaka Sasaki
IPC分类号： G11B5/31
CPC分类号： G11B5/1278 , G11B5/232 , G11B5/3116 , G11B5/3146
摘要： A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed.
摘要翻译：公开了一种用于在ABS处提供增加的磁通量的垂直写入极的结构和工艺。这是通过增加起始于写入间隙的写入通量的量来实现的，而不改变ABS处的极锥度。讨论本发明的三个实施例。

13. 发明授权

US08339751B2 Shield design for magnetic recording head 有权
标题翻译：磁记录头的屏蔽设计
公开(公告)号：US08339751B2
公开(公告)日：2012-12-25
申请号：US13066099
申请日：2011-04-06
申请人： Glen Garfunkel , Moris Dovek , Kenichi Takano , Joseph Smyth , Yuchen Zhou
发明人： Glen Garfunkel , Moris Dovek , Kenichi Takano , Joseph Smyth , Yuchen Zhou
IPC分类号： G11B5/39
CPC分类号： G11B5/11 , G11B5/3146 , G11B5/3912
摘要： A method is disclosed for forming a magnetic shield in which all domain patterns and orientations are stable and which are consistently repeated each time said shield is exposed to an initialization field. The shield is given a shape which ensures that all closure domains can align themselves at a reduced angle relative to the initialization direction while still being roughly antiparallel to one another. Most, though not all, of these shapes are variations on trapezoids.
摘要翻译：公开了一种用于形成磁屏蔽的方法，其中所有区域图案和取向是稳定的，并且每当所述屏蔽暴露于初始化场时一直被重复。该护罩具有一种形状，其确保所有封闭区域能够相对于初始化方向以较小的角度对准自身，同时仍然彼此大致反平行。这些形状的大部分（尽管不是全部）是梯形的变化。

14. 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。

15. 发明授权

US08059366B2 Perpendicular magnetic recording head with a laminated pole 有权
标题翻译：带磁极的垂直磁记录头
公开(公告)号：US08059366B2
公开(公告)日：2011-11-15
申请号：US11879952
申请日：2007-07-19
申请人： Kenichi Takano , Lijie Guan , Yuchen Zhou , Joe Smyth , Moris Dovek
发明人： Kenichi Takano , Lijie Guan , Yuchen Zhou , Joe Smyth , Moris Dovek
IPC分类号： G11B5/147 , G11B5/127
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/147 , G11B5/3143
摘要： A laminated write pole layer for a PMR write head is disclosed in which a plurality of “n” magnetic layers and “n−1” non-magnetic spacers are formed in an alternating fashion on a substrate. The non-magnetic spacers promote exchange decoupling or antiferromagnetic coupling between adjacent magnetic layers. Writability is improved when the trailing magnetic layer has a thickness greater than the thickness of other magnetic layers and preferably >25% of the total thickness of the magnetic layers. The thicknesses of the other magnetic layers may be equal or may become progressively smaller with increasing distance from the trailing magnetic layer. In another embodiment, the non-magnetic spacer between the trailing magnetic layer and the nearest magnetic layer is replaced by a magnetic spacer made of a soft magnetic material to promote magnetic coupling and effectively increase the thickness of the trailing magnetic layer.
摘要翻译：公开了一种用于PMR写入头的层叠写入极层，其中在衬底上以交替的方式形成多个“n”个磁性层和“n-1”个非磁性间隔物。非磁性间隔物促进相邻磁性层之间的交换去耦或反铁磁耦合。当后磁性层的厚度大于其它磁性层的厚度，优选磁性层的总厚度的25％时，写入性能得到改善。其他磁性层的厚度可以相等或随着与后磁性层的距离的增加而逐渐变小。在另一个实施例中，后磁性层和最近的磁性层之间的非磁性间隔物被由软磁材料制成的磁性间隔物代替，以促进磁耦合并有效地增加后磁层的厚度。

16. 发明授权

US08035930B2 Perpendicular magnetic recording write head with a side shield 有权
标题翻译：垂直磁记录头带侧面屏蔽
公开(公告)号：US08035930B2
公开(公告)日：2011-10-11
申请号：US11906717
申请日：2007-10-03
申请人： Kenichi Takano , Lijie Guan , Yiu Liu , Joe Smyth , Moris Dovek
发明人： Kenichi Takano , Lijie Guan , Yiu Liu , Joe Smyth , Moris Dovek
IPC分类号： G11B5/127
CPC分类号： G11B5/3163 , G11B5/1278 , G11B5/3116 , G11B5/3146 , G11B5/315
摘要： A side shield structure for a PMR write head is disclosed that narrows write width and minimizes adjacent track and far track erasure. The side shield structure on each side of the write pole has two sections. One section along the ABS and adjacent to the pole tip has a height (SSH1) defined by SSH1≦[(0.6×neck height)+0.08] microns. There is a non-magnetic gap layer between the first section and a second section that is formed adjacent to the flared sides of the main pole layer and serves to suction leakage flux from the flared portion and prevent unwanted flux from reaching the first side shield sections. A fabrication method is provided that includes electroplating the first side shield sections, depositing the non-magnetic gap layer, and then electroplating the second side shield sections. Subsequently, a main pole layer and a trailing shield are formed.
摘要翻译：公开了一种用于PMR写头的侧屏蔽结构，其减小写入宽度并使相邻轨道和远轨道擦除最小化。写磁极两侧的侧面屏蔽结构有两个部分。沿着ABS并且与极尖相邻的一个部分具有由SSH1＆nlE定义的高度（SSH1）; [（0.6×颈部高度）+0.08]微米。在第一部分和第二部分之间存在非磁性间隙层，该第二部分与主极层的扩张侧相邻形成，并用于从扩张部分吸收泄漏的焊剂，并防止不期望的焊剂到达第一侧面屏蔽部分。提供一种制造方法，其包括电镀第一侧屏蔽部分，沉积非磁隙层，然后电镀第二侧屏蔽部分。随后，形成主极层和后屏蔽。

17. 发明申请

US20090268344A1 Graded bevel tapered write pole design for field enhancement 有权
标题翻译：分级斜面锥形写柱设计用于场增强
公开(公告)号：US20090268344A1
公开(公告)日：2009-10-29
申请号：US12150553
申请日：2008-04-29
申请人： Lijie Guan , Po-Kang Wang , Moris Dovek , Joe Smyth , Kenichi Takano , Yoshitaka Sasaki
发明人： Lijie Guan , Po-Kang Wang , Moris Dovek , Joe Smyth , Kenichi Takano , Yoshitaka Sasaki
IPC分类号： G11B5/23
CPC分类号： G11B5/1278 , G11B5/232 , G11B5/3116 , G11B5/3146
摘要： A structure and a process for a perpendicular write pole that provides increased magnetic flux at the ABS is disclosed. This is accomplished by increasing the amount of write flux that originates above the write gap, without changing the pole taper at the ABS. Three embodiment of the invention are discussed.
摘要翻译：公开了一种用于在ABS处提供增加的磁通量的垂直写入极的结构和工艺。这是通过增加起始于写入间隙的写入通量的量来实现的，而不改变ABS处的极锥度。讨论本发明的三个实施例。

18. 发明申请

US20090034130A1 Shield design for magnetic recording head 审中-公开
标题翻译：磁记录头的屏蔽设计
公开(公告)号：US20090034130A1
公开(公告)日：2009-02-05
申请号：US11888856
申请日：2007-08-02
申请人： Glen Garfunkel , Moris Dovek , Kenichi Takano , Joseph Smyth , Yuchen Zhou
发明人： Glen Garfunkel , Moris Dovek , Kenichi Takano , Joseph Smyth , Yuchen Zhou
IPC分类号： G11B5/127 , G11B5/33
CPC分类号： G11B5/11 , G11B5/3146 , G11B5/3912
摘要： A magnetic shield in which all domain patterns and orientations are stable and which are consistently repeated each time said shield is exposed to an initialization field, is disclosed. This has been achieved by giving it a suitable shape which ensures that all closure domains can align themselves at a reduced angle relative to the initialization direction while still being roughly antiparallel to one another. Most, though not all, of these shapes are variations on trapezoids.
摘要翻译：公开了一种磁屏蔽，其中所有的畴图案和取向都是稳定的，并且每当所述屏蔽暴露于初始化场时一直被重复。这已经通过赋予其合适的形状来实现，该形状确保所有封闭区域能够相对于初始化方向以相对于初始化方向减小的角度对准它们，同时仍然彼此大致反平行。这些形状的大部分（尽管不是全部）是梯形的变化。

19. 发明授权

US09222994B2 Perpendicular spin torque oscillator FMR frequency measurement method 有权
标题翻译：垂直自旋转矩振荡器FMR频率测量方法
公开(公告)号：US09222994B2
公开(公告)日：2015-12-29
申请号：US13200148
申请日：2011-09-19
申请人： Yuchen Zhou , Kunliang Zhang , Min Li , Kenichi Takano , Joe Smyth , Moris Dovek , Akihiko Takeo , Tomomi Funayama , Masahiro Takashita , Masayuki Takagishi
发明人： Yuchen Zhou , Kunliang Zhang , Min Li , Kenichi Takano , Joe Smyth , Moris Dovek , Akihiko Takeo , Tomomi Funayama , Masahiro Takashita , Masayuki Takagishi
IPC分类号： G01R23/02 , G01R33/12 , G11B5/39 , H01L43/08 , G11C11/16
CPC分类号： G01R33/1284 , G11B5/3903 , G11C11/161 , G11C11/1673 , G11C11/1675 , H01L43/08
摘要： A method for measuring the frequency in a spin torque oscillator having at least a magnetic oscillation layer (MOL), junction layer, and magnetic reference layer (MRL) is disclosed. In a first embodiment, a small in-plane magnetic field is applied to the STO after a DC current is applied to excite the MOL into an oscillation state. The MRL has a perpendicular magnetization that is tilted slightly to give an in-plane magnetization component to serve as a reference layer for measuring the oscillation frequency of the MOL in-plane magnetization component. An AC voltage change is produced in the DC current as a result of variable STO resistance and directly correlates to MOL oscillation frequency. Alternatively, a field having both perpendicular and in-plane components may be applied externally or by forming the STO between two magnetic poles thereby producing an in-plane magnetization reference component in the MRL.
摘要翻译：公开了一种用于测量至少具有磁振荡层（MOL），结层和磁参考层（MRL）的自旋转矩振荡器中的频率的方法。在第一实施例中，在施加DC电流以将MOL激发到振荡状态之后，将小的面内磁场施加到STO。 MRL具有稍微倾斜的垂直磁化，以产生面内磁化分量，用作用于测量MOL面内磁化分量的振荡频率的参考层。作为可变STO电阻的结果，在DC电流中产生AC电压变化，并直接与MOL振荡频率相关。或者，具有垂直和平面内部分量的场可以在外部施加，或者通过在两个磁极之间形成STO，从而在MRL中产生面内磁化参考分量。

20. 发明授权

US08559132B2 Perpendicular magnetic recoding head with a laminated pole 有权
标题翻译：垂直磁记录头与层叠极
公开(公告)号：US08559132B2
公开(公告)日：2013-10-15
申请号：US13373251
申请日：2011-11-09
申请人： Kenichi Takano , Lijie Guan , Yuchen Zhou , Joe Smyth , Moris Dovek
发明人： Kenichi Takano , Lijie Guan , Yuchen Zhou , Joe Smyth , Moris Dovek
IPC分类号： G11B5/127 , G11B5/147
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/147 , G11B5/3143
摘要： A laminated write pole layer for a PMR write head is disclosed in which a plurality of “n” magnetic layers and “n−1” non-magnetic spacers are formed in an alternating fashion on a substrate. The non-magnetic spacers promote exchange decoupling or antiferromagnetic coupling between adjacent magnetic layers. Writability is improved when the trailing magnetic layer has a thickness greater than the thickness of other magnetic layers and preferably >25% of the total thickness of the magnetic layers. The thicknesses of the other magnetic layers may be equal or may become progressively smaller with increasing distance from the trailing magnetic layer. In another embodiment, the non-magnetic spacer between the trailing magnetic layer and the nearest magnetic layer is replaced by a magnetic spacer made of a soft magnetic material to promote magnetic coupling and effectively increase the thickness of the trailing magnetic layer.
摘要翻译：公开了一种用于PMR写入头的层叠写入极层，其中在衬底上以交替的方式形成多个“n”个磁性层和“n-1”个非磁性间隔物。非磁性间隔物促进相邻磁性层之间的交换去耦或反铁磁耦合。当后磁性层的厚度大于其它磁性层的厚度，优选磁性层的总厚度的25％时，写入性能得到改善。其他磁性层的厚度可以相等或随着与后磁性层的距离的增加而逐渐变小。在另一个实施例中，后磁性层和最近的磁性层之间的非磁性间隔物被由软磁材料制成的磁性隔离层代替，以促进磁耦合并有效地增加后磁层的厚度。

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