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1. 发明授权

US10115416B2 Magnetic recording write apparatus having a pole having an aspect ratio greater than one and an auxiliary pole 有权
公开(公告)号：US10115416B2
公开(公告)日：2018-10-30
申请号：US15652629
申请日：2017-07-18
申请人： WESTERN DIGITAL (FREMONT), LLC
发明人： Feng Liu , Zhigang Bai , Peng Luo , Jinqiu Zhang , Ming Sun , Xiaoyu Yang , Yifan Zhang , Xiaojun Zhang , Ming Jiang
IPC分类号： G11B5/31 , G11B5/127 , G11B5/21 , G11B5/147
摘要： A magnetic write apparatus has a media-facing surface (MFS) and includes an auxiliary pole, coil(s) and a main pole having a pole tip and a yoke. The pole tip occupies part of the MFS. The yoke has a yoke length measured from the MFS in a yoke direction perpendicular to the MFS. The yoke length is less than four microns. The main pole has a total length in the yoke direction and a width in a cross-track direction. The main pole is continuous along the total length. The aspect ratio of the main pole is the total length divided by the width and exceeds one. The main pole includes surface(s) having a nonzero acute flare angle from the MFS. The auxiliary pole is adjacent to the main pole and recessed from the MFS by not more than 1.05 micron. The coil(s) energizes the main pole and have not more than two turns.

2. 发明授权

US09741366B1 Method for fabricating a magnetic writer having a gradient in saturation magnetization of the shields 有权
公开(公告)号：US09741366B1
公开(公告)日：2017-08-22
申请号：US14871553
申请日：2015-09-30
申请人： Western Digital (Fremont), LLC
发明人： Jinqiu Zhang , Feng Liu , Ming Sun , Yunfei Li , Ming Jiang , Xiaojun Zhang
IPC分类号： G11B5/127 , G11B5/187 , G11B5/31
CPC分类号： G11B5/1272 , G11B5/11 , G11B5/1278 , G11B5/187 , G11B5/23 , G11B5/3116 , G11B5/315 , G11B5/3163
摘要： A method provides a magnetic transducer having a media-facing surface (MFS). The method includes providing a pole, providing a side gap, providing coil(s) for energizing the pole and providing side shield(s). A portion of the pole resides at the MFS. The side gap is between the pole and the side shield(s). The side shield(s) have a gradient in a saturation magnetization such that the saturation magnetization increases in a yoke direction perpendicular to the MFS. The step of providing the side shield(s) further includes providing a nonmagnetic structure having a side surface parallel to the MFS and providing at least one side shield layer. A portion of the side shield layer(s) are on the side surface. The portion of the side shield layer(s) has the gradient in the saturation magnetization. At least part of the side shield being formed by the portion of the side shield layer(s).

3. 发明授权

US09135930B1 Method for fabricating a magnetic write pole using vacuum deposition 有权
标题翻译：使用真空沉积制造磁性写入极的方法
公开(公告)号：US09135930B1
公开(公告)日：2015-09-15
申请号：US14300482
申请日：2014-06-10
申请人： Western Digital (Fremont), LLC
发明人： Li Zeng , Dehua Han , Ming Sun , Jose A. Medina , Jia Li , Liang Hong , Zhigang Bai , Yugang Wang
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163
摘要： A method and system provide a magnetic transducer having an air-bearing surface (ABS) and an intermediate layer. A trench having a shape and location corresponding to a main pole is formed in the intermediate layer. The main pole is provided. At least a portion of the main pole is in the trench. Providing the main pole further includes vacuum depositing a first main pole material layer. The first main pole material layer is thin enough to preclude filling of the trench. The first main pole material layer is then ion beam etched. A second main pole layer is vacuum deposited on the first main pole layer. The second main pole material layer is also thin enough to preclude filling of the trench. An additional main pole layer is also deposited.
摘要翻译：一种方法和系统提供具有空气轴承表面（ABS）和中间层的磁换能器。在中间层中形成具有与主极对应的形状和位置的沟槽。提供主杆。主极的至少一部分在沟槽中。设置主极还包括真空沉积第一主极材料层。第一主极材料层足够薄以防止填充沟槽。然后将第一主极材料层进行离子束蚀刻。第二主极层被真空沉积在第一主极层上。第二主极材料层也足够薄以阻止填充沟槽。还沉积了另外的主极层。

4. 发明授权

US08879207B1 Method for providing a side shield for a magnetic recording transducer using an air bridge 有权
标题翻译：用于使用空气桥提供用于磁记录换能器的侧屏蔽的方法
公开(公告)号：US08879207B1
公开(公告)日：2014-11-04
申请号：US13887252
申请日：2013-05-03
申请人： Western Digital (Fremont), LLC
发明人： Jinqiu Zhang , Feng Liu , Shaoping Li , Ming Sun
IPC分类号： G11B5/127 , G11B5/11
CPC分类号： G11B5/112 , G11B5/1278 , G11B5/3116 , G11B5/315 , G11B5/3163 , Y10T29/49044
摘要： A method fabricates a side shield for a magnetic transducer having a nonmagnetic layer and an ABS location corresponding to an ABS. The nonmagnetic layer has a pole trench therein. The pole trench has a shape and location corresponding to the pole. A wet etchable layer is deposited. Part of the wet etchable layer resides in the pole trench. A pole is formed. The pole has a bottom and a top wider than the bottom in the pole tip region. Part of the pole in the pole tip region is in the pole trench on at least part of the wet etchable layer. At least parts of the wet etchable layer and the nonmagnetic layer are removed, forming an air bridge. The air bridge is between part of the pole at the ABS location and an underlying layer. Side shield layer(s) that substantially fill the air bridge are deposited.
摘要翻译：一种制造用于具有对应于ABS的非磁性层和ABS位置的磁换能器的侧屏蔽的方法。非磁性层在其中具有极沟槽。极沟具有对应于极的形状和位置。沉积湿蚀刻层。湿蚀刻层的一部分位于极沟槽中。一个极点形成。电极具有底部和顶部宽于电极尖端区域中的底部。极尖区域中的极的一部分在至少部分湿蚀刻层的极沟中。去除湿蚀刻层和非磁性层的至少一部分，形成空气桥。空气桥在ABS位置的极点的一部分和下层之间。基本上填充空气桥的侧面屏蔽层被沉积。

5. 发明授权

US09721591B1 Magnetic recording write apparatus having a pole having an aspect ratio greater than one and an auxiliary pole 有权
公开(公告)号：US09721591B1
公开(公告)日：2017-08-01
申请号：US15097182
申请日：2016-04-12
申请人： Western Digital (Fremont), LLC
发明人： Feng Liu , Zhigang Bai , Peng Luo , Jinqiu Zhang , Ming Sun , Xiaoyu Yang , Yifan Zhang , Xiaojun Zhang , Ming Jiang
IPC分类号： G11B5/127 , G11B5/31 , G11B5/21 , G11B5/147
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1475 , G11B5/21 , G11B5/3146
摘要： A magnetic write apparatus has a media-facing surface (MFS) and includes an auxiliary pole, coil(s) and a main pole having a pole tip and a yoke. The pole tip occupies part of the MFS. The yoke has a yoke length measured from the MFS in a yoke direction perpendicular to the MFS. The yoke length is less than four microns. The main pole has a total length in the yoke direction and a width in a cross-track direction. The main pole is continuous along the total length. The aspect ratio of the main pole is the total length divided by the width and exceeds one. The main pole includes surface(s) having a nonzero acute flare angle from the MFS. The auxiliary pole is adjacent to the main pole and recessed from the MFS by not more than 1.05 micron. The coil(s) energizes the main pole and have not more than two turns.

6. 发明授权

US09934811B1 Methods for controlling stray fields of magnetic features using magneto-elastic anisotropy 有权
公开(公告)号：US09934811B1
公开(公告)日：2018-04-03
申请号：US14312317
申请日：2014-06-23
申请人： Western Digital (Fremont), LLC
发明人： Ming Sun , Jose A. Medina , Ming Jiang , Ming Zhao
IPC分类号： G11B5/858 , C25D21/04 , G11B5/84 , C25D5/18 , C25D5/00
CPC分类号： G11B5/858 , C25D3/562 , C25D5/003 , C25D5/18 , C25D5/48 , C25D17/10 , C25D21/12 , G11B5/00
摘要： Systems and methods for controlling stray fields of a magnetic feature are provided. One such method can involve selecting a plurality of materials for a magnetic feature, selecting a plurality of additives, combining the plurality of materials for the magnetic feature and the plurality of additives in an electrolyte solution to form a combined solution, adding nitrogen to the combined solution, degassing the combined solution, depositing the combined solution as a thin film on a wafer using pulse plating, and lapping the thin film to form an edge of the magnetic feature. In several embodiments, the magnetic feature is a component of a magnetic transducer such as a writer pole, a reader shield, or a writer shield.

7. 发明授权

US09443541B1 Magnetic writer having a gradient in saturation magnetization of the shields and return pole 有权
标题翻译：磁性写入器具有屏蔽和返回极的饱和磁化梯度
公开(公告)号：US09443541B1
公开(公告)日：2016-09-13
申请号：US14667506
申请日：2015-03-24
申请人： Western Digital (Fremont), LLC
发明人： Feng Liu , El-Amine Salhi , Ming Sun , Tao Pan
IPC分类号： G11B5/11 , G11B5/60 , G11B5/127
CPC分类号： G11B5/11 , G11B5/1278 , G11B5/315 , G11B5/3163
摘要： A method and system provide a magnetic transducer. The transducer includes a main pole, a side gap, at least one coil, a side shield and at least one of a leading shield, a trailing shield and a return pole. The coil(s) are configured to energize the main pole. The side gap is between the main pole and the side shield. The main pole is between the leading shield and the trailing shield. The trailing shield is between the main pole and the return pole. The side shield is between the leading shield and the trailing shield. At least one of the leading shield, the trailing shield and the return pole have a gradient in saturation magnetization such that the saturation magnetization varies in a down track direction.
摘要翻译：一种方法和系统提供一种磁换能器。换能器包括主极，侧间隙，至少一个线圈，侧屏蔽以及前屏蔽，后屏蔽和返回极中的至少一个。线圈被配置为使主极通电。侧面间隙位于主极和侧面屏蔽之间。主杆位于前盾和后盾之间。后挡板位于主杆和返回杆之间。侧面护罩位于前挡板和后挡板之间。前导屏蔽，后屏蔽和返回极中的至少一个具有饱和磁化强度的梯度，使得饱和磁化强度沿向下的磁道方向变化。

8. 发明授权

US09280990B1 Method for fabricating a magnetic writer using multiple etches 有权
标题翻译：使用多个蚀刻制造磁性写入器的方法
公开(公告)号：US09280990B1
公开(公告)日：2016-03-08
申请号：US14229297
申请日：2014-03-28
申请人： Western Digital (Fremont), LLC
发明人： Jinqiu Zhang , Feng Liu , Hongmei Han , Ming Sun , Xiaotian Zhou
IPC分类号： B44C1/22 , G11B5/31
CPC分类号： G11B5/3163 , G11B5/1278 , G11B5/3116
摘要： A method and system provide a magnetic transducer having an air-bearing surface (ABS) location. The method includes forming a trench in the intermediate layer using a plurality of etches. A first etch substantially provides a first portion of the trench having a first sidewall angle. The second etch substantially provides a second portion of the trench having a second sidewall angle. The second sidewall angle is greater than the first sidewall angle. The second portion of the trench includes the ABS location. The method also includes providing a main pole in the trench. The main pole has a plurality of sidewalls. The sidewalls having the first sidewall angle in the first portion of the trench and the second sidewall angle in the second portion of the trench.
摘要翻译：一种方法和系统提供具有空气轴承表面（ABS）位置的磁换能器。该方法包括使用多个蚀刻在中间层中形成沟槽。第一蚀刻基本上提供具有第一侧壁角的沟槽的第一部分。第二蚀刻基本上提供具有第二侧壁角的沟槽的第二部分。第二侧壁角度大于第一侧壁角度。沟槽的第二部分包括ABS位置。该方法还包括在沟槽中提供主极。主极具有多个侧壁。所述侧壁在沟槽的第一部分具有第一侧壁角，并且在沟槽的第二部分中具有第二侧壁角。

9. 发明授权

US10037770B1 Method for providing a magnetic recording write apparatus having a seamless pole 有权
公开(公告)号：US10037770B1
公开(公告)日：2018-07-31
申请号：US14939934
申请日：2015-11-12
申请人： Western Digital (Fremont), LLC
发明人： Krishna Bahadur Chetry , Ming Sun , Jinqiu Zhang
IPC分类号： G11B5/127 , G11B5/17 , G11B5/31
CPC分类号： G11B5/1272 , G11B5/1278 , G11B5/17 , G11B5/3116 , G11B5/3163 , Y10T29/49021 , Y10T29/49032 , Y10T29/4906
摘要： A method provides a magnetic write apparatus. The method includes providing a pole including a pole tip, a yoke, a pole bottom and a pole top. The pole is seam free and formed vertically in a direction from the pole bottom toward the pole top. At least one coil for energizing the pole is also provided. In some aspects, providing the pole may include removing a portion of an intermediate layer to form a trench therein. The trench has a shape and location corresponding to the pole, a bottom, a top and sides. A conductive layer is deposited in the trench and on a top surface of the intermediate layer. Insulating layer(s) are provided on the sides of the trench. Only part of the conductive layer on the trench bottom is exposed. Pole material(s) are grown on the exposed portion of the conductive layer to provide the pole.

10. 发明授权

US09934794B1 Writer having a recessed trailing shield and nonmagnetic refill 有权
公开(公告)号：US09934794B1
公开(公告)日：2018-04-03
申请号：US15019062
申请日：2016-02-09
申请人： Western Digital (Fremont), LLC
发明人： Ran Lin , Ming Sun , El-Amine Salhi , Donghong Li , Yunfei Li , Ming Jiang
IPC分类号： G11B5/31 , G11B5/17 , G11B5/60
CPC分类号： G11B5/3116 , G11B5/17 , G11B5/6005
摘要： A magnetic apparatus has a media-facing surface (MFS), a pole, a write gap at the MFS, a trailing shield, coil(s) and a nonmagnetic refill material. The pole includes a pole tip proximate to the MFS. The trailing shield includes a pedestal and a recessed portion. The pedestal occupies a portion of the MFS. The recessed portion has a front surface at an acute angle from the MFS and is recessed from the MFS by a distance of not more than 0.8 micrometers. The write gap is between the pedestal and the pole tip. The coil(s) energize the pole and have at least one turn. The coil(s) are between the recessed portion of the trailing shield and the pole. The trailing shield is between the nonmagnetic refill material and the pole. A portion of the nonmagnetic refill material is between the recessed portion and the MFS.

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