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1. 发明授权

US10115419B2 Method for AFC shields for multiple sensor magnetic transducers and magnetic transducers having multiple sensors and AFC shields 有权
公开(公告)号：US10115419B2
公开(公告)日：2018-10-30
申请号：US15672857
申请日：2017-08-09
申请人： WESTERN DIGITAL (FREMONT), LLC
发明人： Rongfu Xiao , Shihai He , Daniele Mauri , Ming Mao , Shaoping Li
IPC分类号： G11B5/39 , G11B5/11 , G11B5/48 , C21D6/00 , C21D9/00 , G11B5/31
摘要： A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method includes providing a first shield, a first read sensor, an antiferromagnetically coupled (AFC) shield that includes an antiferromagnet, a second read sensor and a second shield. The read sensors are between the first and second shields. The AFC shield is between the read sensors. An optional anneal for the first shield is in a magnetic field at a first angle from the ABS. Anneals for the first and second read sensors are in magnetic fields in desired first and second read sensor bias directions. The AFC shield anneal is in a magnetic field at a third angle from the ABS. The second shield anneal is in a magnetic field at a fifth angle from the ABS. The fifth angle is selected based on a thickness and a desired AFC shield bias direction for the antiferromagnet.

2. 发明授权

US10074387B1 Method and system for providing a read transducer having symmetric antiferromagnetically coupled shields 有权
公开(公告)号：US10074387B1
公开(公告)日：2018-09-11
申请号：US14578450
申请日：2014-12-21
申请人： Western Digital (Fremont), LLC
发明人： Rongfu Xiao , Miaoyin Wang , Zhihong Zhang , Guanghong Luo , Ming Mao
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/3909 , G11B2005/3996
摘要： A method provides a magnetic transducer including a first antiferromagnetically coupled (AFC) shield, a second AFC shield and a read sensor between the first and second AFC shields. The first AFC shield includes first and second ferromagnetic layers and a first nonmagnetic spacer layer between the first and second ferromagnetic layers. The first and second ferromagnetic layers have first and second saturation magnetizations and first and second thicknesses, respectively. The second ferromagnetic layer is between the read sensor and the first ferromagnetic layer. The second AFC shield includes third and fourth ferromagnetic layers and a second nonmagnetic spacer layer between the third and fourth ferromagnetic layers. The third ferromagnetic layer is between the read sensor and the fourth ferromagnetic layer. The third and fourth ferromagnetic layers have third and saturation magnetizations and third and fourth thicknesses, respectively. The second AFC shield is a mirror image of the first AFC shield.

3. 发明授权

US09830936B2 Magnetic read head with antiferromagentic layer 有权
公开(公告)号：US09830936B2
公开(公告)日：2017-11-28
申请号：US14943211
申请日：2015-11-17
申请人： Western Digital (Fremont), LLC
发明人： Shaoping Li , Yuankai Zheng , Gerardo A. Bertero , Qunwen Leng , Michael L. Mallary , Rongfu Xiao , Ming Mao , Zhihong Zhang , Anup G. Roy , Chen Jung Chien , Zhitao Diao , Ling Wang
IPC分类号： G11B5/39 , G11B5/31
CPC分类号： G11B5/3909 , G11B5/3163 , G11B5/3912 , G11B5/398 , Y10T428/1114
摘要： A tunnel magnetoresistance (TMR) read sensor having a tabbed AFM layer and an extended pinned layer and methods for making the same are provided. The TMR read sensor has an AFM layer recessed from the air bearing surface, providing a reduced shield-to-shield distance.

4. 发明授权

US09666214B1 Free layer magnetic reader that may have a reduced shield-to-shield spacing 有权
公开(公告)号：US09666214B1
公开(公告)日：2017-05-30
申请号：US14862895
申请日：2015-09-23
申请人： Western Digital (Fremont), LLC
发明人： Gerardo A. Bertero , Shaoping Li , Qunwen Leng , Yuankai Zheng , Rongfu Xiao , Ming Mao , Shihai He , Miaoyin Wang
IPC分类号： G11B5/39 , G11B5/115
CPC分类号： G11B5/3912 , G11B5/115 , G11B5/3909 , G11B5/3932 , G11B5/398 , G11B2005/3996
摘要： A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.

5. 发明授权

US09412400B2 Tunnel magnetoresistance read head with narrow shield-to-shield spacing 有权
公开(公告)号：US09412400B2
公开(公告)日：2016-08-09
申请号：US14740027
申请日：2015-06-15
申请人： Western Digital (Fremont), LLC
发明人： Rongfu Xiao , Guanxiong Li , Zhihong Zhang , Ming Mao , Chen-Jung Chien
IPC分类号： G11B5/39 , G01R33/09 , G11B5/31 , H01L43/12
CPC分类号： G11B5/3909 , G01R33/098 , G11B5/3163 , G11B5/3912 , G11B5/398 , H01L43/12 , Y10T29/49052
摘要： A tunnel magnetoresistance (TMR) read sensor having a tabbed AFM layer and an extended pinned layer and methods for making the same are provided. The TMR read sensor has an AFM layer recessed from the air bearing surface, providing a reduced shield-to-shield distance.

6. 发明授权

US10121501B2 Free layer magnetic reader that may have a reduced shield-to-shield spacing 有权
公开(公告)号：US10121501B2
公开(公告)日：2018-11-06
申请号：US15597342
申请日：2017-05-17
申请人： WESTERN DIGITAL (FREMONT), LLC
发明人： Gerardo A. Bertero , Shaoping Li , Qunwen Leng , Yuankai Zheng , Rongfu Xiao , Ming Mao , Shihai He , Miaoyin Wang
IPC分类号： G11B5/39 , G11B5/115
摘要： A magnetic read apparatus includes a read sensor, a shield structure and a side magnetic bias structure. The read sensor includes a free layer having a side and a nonmagnetic spacer layer. The shield structure includes a shield pinning structure and a shield reference structure. The nonmagnetic spacer layer is between the shield reference structure and the free layer. The shield reference structure is between the shield pinning structure and the nonmagnetic spacer layer. The shield pinning structure includes a pinned magnetic moment in a first direction. The shield reference structure includes a shield reference structure magnetic moment weakly coupled with the pinned magnetic moment. The side magnetic bias structure is adjacent to the side of the free layer.

7. 发明授权

US09431031B1 System and method for magnetic transducers having multiple sensors and AFC shields 有权
标题翻译：具有多个传感器和AFC屏蔽的磁性换能器的系统和方法
公开(公告)号：US09431031B1
公开(公告)日：2016-08-30
申请号：US14667433
申请日：2015-03-24
申请人： Western Digital (Fremont), LLC
发明人： Rongfu Xiao , Shihai He , Daniele Mauri , Ming Mao , Shaoping Li
IPC分类号： G11B5/39 , G11B5/11 , G11B5/60
CPC分类号： G11B5/3912 , C21D6/001 , C21D6/007 , C21D9/0068 , G11B5/11 , G11B5/112 , G11B5/3163 , G11B5/3909 , G11B5/3932 , G11B5/3948 , G11B5/397 , G11B5/4886 , G11B2005/3996
摘要： A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method includes providing a first shield, a first read sensor, an antiferromagnetically coupled (AFC) shield that includes an antiferromagnet, a second read sensor and a second shield. The read sensors are between the first and second shields. The AFC shield is between the read sensors. An optional anneal for the first shield is in a magnetic field at a first angle from the ABS. Anneals for the first and second read sensors are in magnetic fields in desired first and second read sensor bias directions. The AFC shield anneal is in a magnetic field at a third angle from the ABS. The second shield anneal is in a magnetic field at a fifth angle from the ABS. The fifth angle is selected based on a thickness and a desired AFC shield bias direction for the antiferromagnet.
摘要翻译：一种方法和系统提供具有空气轴承表面（ABS）的磁换能器。该方法包括提供第一屏蔽，第一读取传感器，包括反铁磁体的反铁磁耦合（AFC）屏蔽，第二读取传感器和第二屏蔽。读取的传感器位于第一和第二屏蔽之间。 AFC屏蔽位于读取传感器之间。第一屏蔽件的可选退火处于与ABS成一定角度的磁场中。用于第一和第二读取传感器的退火处于期望的第一和第二读取传感器偏置方向的磁场中。 AFC屏蔽退火处于与ABS成三角的磁场。第二屏蔽退火处于与ABS成五度角的磁场中。基于反铁磁体的厚度和期望的AFC屏蔽偏置方向选择第五角度。

8. 发明授权

US09064507B1 Magnetic etch-stop layer for magnetoresistive read heads 有权
标题翻译：用于磁阻读头的磁蚀刻停止层
公开(公告)号：US09064507B1
公开(公告)日：2015-06-23
申请号：US14088320
申请日：2013-11-22
申请人： Western Digital (Fremont), LLC
发明人： Mahendra Pakala , Rongfu Xiao , Chando Park
IPC分类号： G11B5/39 , G11B5/11
CPC分类号： G11B5/11 , G11B5/3163 , G11B5/3903 , G11B5/3909 , G11B5/3912 , G11B5/3929
摘要： A tunneling magnetoresistive read head produced thereby are disclosed. A shield layer is provided. A magnetic etch-stop layer is formed over the shield layer, where the magnetic etch-stop layer comprises a nonmagnetic metal and a soft magnetic material with overall property still being magnetically soft. A sensor stack is formed over the magnetic etch-stop layer. A patterned mask layer is formed over the sensor stack. Material from a portion of the sensor stack not covered by the patterned mask is removed.
摘要翻译：公开了由此制造的隧道磁阻读取头。提供屏蔽层。在屏蔽层上形成磁性蚀刻停止层，其中磁性蚀刻停止层包括非磁性金属和总体性能仍然软磁性的软磁性材料。传感器堆叠形成在磁性蚀刻停止层上。在传感器堆叠上形成图案化掩模层。去除了未被图案化掩模覆盖的传感器堆叠的部分的材料。

9. 发明授权

US09754613B2 Method for AFC shields for multiple sensor magnetic transducers and magnetic transducers having multiple sensors and AFC shields 有权
公开(公告)号：US09754613B2
公开(公告)日：2017-09-05
申请号：US15219474
申请日：2016-07-26
申请人： Western Digital (Fremont), LLC
发明人： Rongfu Xiao , Shihai He , Daniele Mauri , Ming Mao , Shaoping Li
IPC分类号： G11B5/39 , G11B5/11 , G11B5/48 , C21D6/00 , C21D9/00 , G11B5/31
CPC分类号： G11B5/3912 , C21D6/001 , C21D6/007 , C21D9/0068 , G11B5/11 , G11B5/112 , G11B5/3163 , G11B5/3909 , G11B5/3932 , G11B5/3948 , G11B5/397 , G11B5/4886 , G11B2005/3996
摘要： A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method includes providing a first shield, a first read sensor, an antiferromagnetically coupled (AFC) shield that includes an antiferromagnet, a second read sensor and a second shield. The read sensors are between the first and second shields. The AFC shield is between the read sensors. An optional anneal for the first shield is in a magnetic field at a first angle from the ABS. Anneals for the first and second read sensors are in magnetic fields in desired first and second read sensor bias directions. The AFC shield anneal is in a magnetic field at a third angle from the ABS. The second shield anneal is in a magnetic field at a fifth angle from the ABS. The fifth angle is selected based on a thickness and a desired AFC shield bias direction for the antiferromagnet.

10. 发明授权

US09431047B1 Method for providing an improved AFM reader shield 有权
标题翻译：提供改进的AFM读取器屏蔽的方法
公开(公告)号：US09431047B1
公开(公告)日：2016-08-30
申请号：US13927007
申请日：2013-06-25
申请人： Western Digital (Fremont), LLC
发明人： Rongfu Xiao
IPC分类号： G11B5/852
CPC分类号： G11B5/852 , G11B5/3909 , G11B5/3912 , G11B2005/3996
摘要： A method provides a magnetic transducer including a first shield, a read sensor, and a second shield. The read sensor is between the first shield and the second shield. The read sensor has at least one pinned layer aligned with a sensor pinning direction. Providing the second shield includes depositing at least one of a first ferromagnetic layer, a second ferromagnetic and a pinning layer in the presence of a first magnetic field in a first direction non-orthogonal and non-parallel to the sensor pinning direction. A nonmagnetic spacer layer is between the first ferromagnetic layer and the second ferromagnetic layer. The pinning layer is adjacent to the second ferromagnetic layer. The first ferromagnetic layer is between the read sensor and the nonmagnetic spacer layer. The first ferromagnetic layer is coupled antiparallel with the second ferromagnetic layer.
摘要翻译：一种方法提供包括第一屏蔽，读取传感器和第二屏蔽的磁换能器。读取传感器位于第一屏蔽和第二屏蔽之间。读取传感器具有与传感器固定方向对准的至少一个固定层。提供第二屏蔽包括在第一方向存在第一方向上非正交并且不平行于传感器钉扎方向沉积第一铁磁层，第二铁磁体和钉扎层中的至少一个。非磁性间隔层位于第一铁磁层和第二铁磁层之间。钉扎层与第二铁磁层相邻。第一铁磁层位于读取传感器和非磁性间隔层之间。第一铁磁层与第二铁磁层反平行地耦合。

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