公开(公告)号：US08520336B1

公开(公告)日：2013-08-27

申请号：US13315098

申请日：2011-12-08

申请人： Feng Liu ,  Tao Pan ,  Zhigang Bai ,  Yugang Wang ,  Sining Mao

发明人： Feng Liu ,  Tao Pan ,  Zhigang Bai ,  Yugang Wang ,  Sining Mao

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3116

摘要： A perpendicular magnetic recording head for use in a hard disk drive has a main pole that has a main pole tip in proximity to an air bearing surface. The main pole tip has a first width at the ABS, extending distally at a first angle measured from the plane of the ABS to a second width measured at a first distance from the ABS. The main pole tip extends distally at a second angle measured from the plane of the ABS from the second width to a third width, wherein the second angle is less than the first angle. The main pole tip extends distally at a third angle measured from the plane of the ABS from the third width to a fourth width, wherein the third angle is greater than the second angle. The first distance is between 25 and 100 nanometers.

摘要翻译： 用于硬盘驱动器的垂直磁记录头具有主极，该主极具有靠近空气轴承表面的主极尖。 主极端部在ABS处具有第一宽度，以从ABS的平面测量的第一角度向距离ABS的第一距离测量的第二宽度向远侧延伸。 主极尖以从ABS的平面从第二宽度测量到第二宽度的第二角度向远侧延伸，其中第二角度小于第一角度。 主极尖以从ABS的平面测量的第三角度从第三宽度向第四宽度向远侧延伸，其中第三角度大于第二角度。 第一个距离在25到100纳米之间。

公开(公告)号：US08179636B1

公开(公告)日：2012-05-15

申请号：US12042691

申请日：2008-03-05

申请人： Zhigang Bai ,  Lisha Wang ,  Tao Pan ,  Yugang Wang ,  Matthew R. Gibbons ,  Sining Mao

发明人： Zhigang Bai ,  Lisha Wang ,  Tao Pan ,  Yugang Wang ,  Matthew R. Gibbons ,  Sining Mao

IPC分类号： G11B5/31

CPC分类号： G11B5/1278 ,  G11B5/3116

摘要： A method and system for providing a magnetic transducer for recording to media is described. The method and system include providing a first pole, a main pole, an auxiliary pole, and at least one coil. The main pole has a first media-facing surface including a recessed portion and a write portion. The auxiliary pole is magnetically coupled with the main pole and has a second media-facing surface. The second media-facing surface includes a first portion and a second portion. The first portion is in proximity to the write portion of the first media-facing surface of the main pole. The second portion is in proximity to and recessed from the recessed portion of the first media-facing surface of the main pole. The coil(s) are for energizing the main pole.

摘要翻译： 描述了一种用于提供用于记录到介质的磁换能器的方法和系统。 该方法和系统包括提供第一极，主极，辅助极和至少一个线圈。 主极具有包括凹部和写入部的第一面向媒体的表面。 辅助极与主极磁耦合并具有第二介质面向表面。 第二面向媒体的表面包括第一部分和第二部分。 第一部分靠近主极的第一面向媒体的表面的写入部分。 第二部分接近主凹槽的第一面向介质表面的凹陷部分并且从其凹入。 线圈用于激励主极。

公开(公告)号：US09053715B1

公开(公告)日：2015-06-09

申请号：US13075070

申请日：2011-03-29

申请人： Lisha Wang ,  Tao Pan ,  Sining Mao ,  Zhigang Bai ,  Feng Liu ,  Zhanjie Li

发明人： Lisha Wang ,  Tao Pan ,  Sining Mao ,  Zhigang Bai ,  Feng Liu ,  Zhanjie Li

IPC分类号： G11B5/147 ,  G11B5/31

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  Y10T29/49044

摘要： A method and system for providing a magnetic recording head is described. The magnetic recording head has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The magnetic recording head includes a main pole, at least one auxiliary pole, a nonmagnetic spacer, and at least one coil. The main pole includes a first main pole piece and a second main pole piece. The first main pole piece includes a pole tip occupying a portion of the ABS and a back edge distal from the ABS. The second main pole piece has a front surface. The auxiliary pole(s) have a front recessed from the ABS and are magnetically coupled with the main pole. The nonmagnetic spacer is between the back edge of the first main pole piece and the front surface of the second main pole piece. The coil(s) are for energizing the main pole.

摘要翻译： 描述了一种用于提供磁记录头的方法和系统。 磁记录头具有在使用期间被配置为驻留在介质附近的空气轴承表面（ABS）。 磁记录头包括主极，至少一个辅助极，非磁性间隔物和至少一个线圈。 主极包括第一主极片和第二主极片。 第一主极件包括占据ABS的一部分的极尖和远离ABS的后边缘。 第二主极片具有前表面。 辅助极具有从ABS凹入的前部并与主极磁耦合。 非磁性间隔物位于第一主极片的后边缘和第二主极片的前表面之间。 线圈用于激励主极。

公开(公告)号：US08259410B1

公开(公告)日：2012-09-04

申请号：US12126310

申请日：2008-05-23

申请人： Zhigang Bai ,  Suping Song ,  Matthew R. Gibbons ,  Sining Mao

发明人： Zhigang Bai ,  Suping Song ,  Matthew R. Gibbons ,  Sining Mao

IPC分类号： G11B5/133

CPC分类号： G11B5/3136 ,  G11B5/133 ,  G11B5/3143 ,  Y10T29/49032

摘要： A method and system for providing a magnetic transducer for recording to media is described. The method and system include providing a first pole, a main pole, at least one coil and at least one auxiliary pole. The main pole is for providing a magnetic field for recording to the media. The coil(s) are for energizing the main pole. The auxiliary pole is magnetically coupled with the main pole. The shield(s) are for magnetically isolating a portion of the magnetic transducer. At least one of the first pole, the auxiliary pole, and the at least one shield includes a composite magnetic material including a plurality of ferromagnetic grains in an insulating matrix.

摘要翻译： 描述了一种用于提供用于记录到介质的磁换能器的方法和系统。 该方法和系统包括提供第一极，主极，至少一个线圈和至少一个辅助极。 主极是为了向媒体提供磁场。 线圈用于激励主极。 辅助极与主极磁耦合。 屏蔽件用于磁性隔离磁换能器的一部分。 第一极，辅助极和至少一个屏蔽中的至少一个包括在绝缘矩阵中包括多个铁磁晶粒的复合磁性材料。

公开(公告)号：US07755861B1

公开(公告)日：2010-07-13

申请号：US11951670

申请日：2007-12-06

申请人： Shaoping Li ,  Zhigang Bai ,  Sining Mao

发明人： Shaoping Li ,  Zhigang Bai ,  Sining Mao

IPC分类号： G11B5/02

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/656 ,  G11B5/66 ,  G11B5/746 ,  G11B2005/0021

摘要： A method and system for providing a magnetic recording medium is disclosed. The magnetic recording medium includes a plurality of regions. Each region corresponds to a bit and includes at least one grain. The grain(s) include a plurality of magnetic layers and at least one interlayer between the magnetic layers. The grain(s) have a thickness less than an exchange length of each of the magnetic layers. In addition, at least one of the magnetic layers has a coercivity different from another of the magnetic layers.

摘要翻译： 公开了一种用于提供磁记录介质的方法和系统。 磁记录介质包括多个区域。 每个区域对应一位，并且包括至少一个颗粒。 颗粒包括多个磁性层和磁性层之间的至少一个中间层。 颗粒的厚度小于每个磁性层的交换长度。 此外，至少一个磁性层具有与另一个磁性层不同的矫顽力。

公开(公告)号：US08194366B1

公开(公告)日：2012-06-05

申请号：US12579315

申请日：2009-10-14

申请人： Shaoping Li ,  Yimin Guo ,  Feng Liu ,  Wei Zhang ,  Sining Mao

发明人： Shaoping Li ,  Yimin Guo ,  Feng Liu ,  Wei Zhang ,  Sining Mao

IPC分类号： G11B5/33

CPC分类号： G11B5/398 ,  G01R33/098 ,  G11B5/3909 ,  H01L43/08 ,  H01L43/12

摘要： A tunneling magnetoresistance (TMR) read head and a method of producing the same are disclosed. A free layer having a free layer stripe height is provided, the free layer having a first side and a second side. A tunneling barrier layer is formed adjacent to the first side of the free layer, the tunneling barrier layer having a first side and a second side, the second side of the tunneling barrier layer facing the first side of the free layer. A pinned stack is formed adjacent to the first side of the tunneling barrier layer. The pinned stack comprises at least one magnetic layer having a current path stripe height that is less than the free layer stripe height.

摘要翻译： 公开了一种隧道磁阻（TMR）读头及其制造方法。 提供具有自由层条纹高度的自由层，自由层具有第一侧和第二侧。 隧道势垒层邻近自由层的第一侧形成，隧道势垒层具有第一侧和第二侧，隧道势垒层的第二面面向自由层的第一侧。 在隧道势垒层的第一侧附近形成钉扎层。 钉扎堆叠包括至少一个具有小于自由层条纹高度的电流路径条纹高度的磁性层。

公开(公告)号：US08514506B1

公开(公告)日：2013-08-20

申请号：US13371252

申请日：2012-02-10

申请人： Shaoping Li ,  Yimin Guo ,  Francis H. Liu ,  Sining Mao

发明人： Shaoping Li ,  Yimin Guo ,  Francis H. Liu ,  Sining Mao

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B5/3954 ,  G11B5/012 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10074 ,  G11B20/10175 ,  G11B20/10222 ,  G11B20/10231 ,  G11B20/10277 ,  G11B20/10305 ,  G11B20/10314 ,  G11B20/10379 ,  G11B20/1258 ,  G11B2220/2516

摘要： A disk drive is disclosed comprising a disk having a plurality of data tracks, and a head actuated over the disk, the head comprising a first read element and a second read element. A data track is read to generate a first read signal emanating from the first read element and a second read signal emanating from the second read element. The first read signal is delayed in continuous time relative to the second read signal to generate a delayed read signal, and the second read signal is combined with the delayed read signal to generate a combined read signal. An estimated data sequence is detected from the combined read signal.

摘要翻译： 公开了一种磁盘驱动器，其包括具有多个数据磁道的磁盘，以及在盘上驱动的磁头，磁头包括第一读取元件和第二读取元件。 读取数据磁道以产生从第一读取元件发出的第一读取信号和从第二读取元件发出的第二读取信号。 第一读取信号相对于第二读取信号以连续时间延迟，以产生延迟的读取信号，并且将第二读取信号与延迟的读取信号组合以产生组合的读取信号。 从组合的读取信号中检测估计的数据序列。

公开(公告)号：US08339736B2

公开(公告)日：2012-12-25

申请号：US11820703

申请日：2007-06-20

申请人： Kaizhong Gao ,  Sining Mao ,  Eric S. Linville ,  Xuebing Feng ,  Shaoping Li ,  Steven Paul Bozeman

发明人： Kaizhong Gao ,  Sining Mao ,  Eric S. Linville ,  Xuebing Feng ,  Shaoping Li ,  Steven Paul Bozeman

IPC分类号： G11B5/17

CPC分类号： G11B5/1278 ,  G11B5/02 ,  G11B5/3123 ,  G11B5/3133 ,  G11B2005/0002

摘要： A magnetic device includes a write element having a write element tip and a conductive coil that carries current to induce a first field in the write element. A first conductor is proximate a leading edge of the write pole tip for carrying current to generate a second field that augments the first field.

摘要翻译： 磁性装置包括具有写入元件尖端的写元件和承载电流以在写入元件中引起第一场的导电线圈。 第一导体靠近写极尖的前缘，用于承载电流以产生增大第一场的第二场。

公开(公告)号：US08298611B2

公开(公告)日：2012-10-30

申请号：US12178443

申请日：2008-07-23

申请人： Nurul Amin ,  Sining Mao

发明人： Nurul Amin ,  Sining Mao

IPC分类号： G11B5/00

CPC分类号： G11B5/84 ,  B26D3/16 ,  B82Y10/00 ,  G11B5/64 ,  G11B5/66 ,  G11B5/743 ,  G11B5/82 ,  G11B5/851 ,  G11B5/865 ,  Y10T83/04

摘要： A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.

摘要翻译： 一种制造离散轨道磁记录介质的方法。 提供基层，沉积重复和交替的磁性层和非磁性层。 磁性层的厚度对应于记录介质的轨道的宽度。 可以使用圆柱形棒作为基层，使得交替的磁性和非磁性层围绕杆螺旋或同心层。 所得到的介质层可以被切割或切成单独的磁性介质，或用于用介质层的离散图案印刷其它介质盘。

公开(公告)号：US07064934B2

公开(公告)日：2006-06-20

申请号：US10459820

申请日：2003-06-12

申请人： Sining Mao ,  William P. Vavra ,  Eric S. Linville

发明人： Sining Mao ,  William P. Vavra ,  Eric S. Linville

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3116 ,  G11B5/3133 ,  G11B5/3903 ,  G11B5/40 ,  G11B2005/0016

摘要： A magnetoresistive (MR) sensor having reduced operating temperature is disclosed. The MR sensor, which includes an MR stack having a magnetoresistive layer, is configured to operate in a current-perpendicular-to-plane (CPP) mode wherein a sense current flows substantially perpendicular to a longitudinal plane of the magnetoresistive layer. The MR sensor further includes a thermal sink layer positioned with respect to the MR stack to reduce an operating temperature of the magnetoresistive sensor. The thermal sink layer is made of a material having high thermal conductivity, and is preferably separated from the MR stack by a metallic cap or seed layer.

摘要翻译： 公开了具有降低的工作温度的磁阻（MR）传感器。 包括具有磁阻层的MR堆叠的MR传感器被配置为以电流垂直于平面（CPP）模式工作，其中感测电流基本上垂直于磁阻层的纵向平面流动。 MR传感器还包括相对于MR堆叠定位的散热层，以降低磁阻传感器的工作温度。 散热层由具有高导热性的材料制成，并且优选地通过金属盖或种子层与MR堆叠分离。