公开(公告)号：US09019665B2

公开(公告)日：2015-04-28

申请号：US13067164

申请日：2011-05-12

申请人： Chiuming Lueng ,  Mankit Lee ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Mankit Lee ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G11B5/33 ,  G01R33/00 ,  G01R33/025 ,  G11B5/39

CPC分类号： G11B5/398 ,  G01R33/0011 ,  G01R33/0017 ,  G01R33/025 ,  G11B5/3912 ,  G11B5/3932 ,  G11B2005/3996

摘要： A reader sensor comprises a first shielding layer, a second shielding layer, a read element formed therebetween, and a pair of permanent magnet layer respectively placed on two sides of the read element; and it further comprises a magnetic field generating means formed beside the read element and arranged for providing a magnetic field with a direction perpendicular to the first shielding layer and the second shielding layer, thereby stabilizing the reading performance of the reader sensor. The invention can stabilize the reading performance, ameliorate the unstable defective reader sensor, and decrease the waste and the manufacturing cost. The present invention also discloses a magnetic head, a HGA and a disk drive unit.

摘要翻译： 读取器传感器包括第一屏蔽层，第二屏蔽层，在其间形成的读取元件和分别放置在读取元件两侧的一对永磁体层; 并且还包括在读取元件旁边形成的磁场产生装置，用于提供垂直于第一屏蔽层和第二屏蔽层的方向的磁场，从而稳定读取器传感器的读取性能。 本发明可以稳定阅读性能，改善不稳定的读卡器不稳定传感器，减少浪费和制造成本。 本发明还公开了一种磁头，HGA和盘驱动单元。

公开(公告)号：US20120287534A1

公开(公告)日：2012-11-15

申请号：US13067164

申请日：2011-05-12

申请人： Chiuming Lueng ,  Mankit Lee ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Mankit Lee ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G11B5/127 ,  G11B17/02 ,  G11B5/48

CPC分类号： G11B5/398 ,  G01R33/0011 ,  G01R33/0017 ,  G01R33/025 ,  G11B5/3912 ,  G11B5/3932 ,  G11B2005/3996

摘要： A reader sensor comprises a first shielding layer, a second shielding layer, a read element formed therebetween, and a pair of permanent magnet layer respectively placed on two sides of the read element; and it further comprises a magnetic field generating means formed beside the read element and arranged for providing a magnetic field with a direction perpendicular to the first shielding layer and the second shielding layer, thereby stabilizing the reading performance of the reader sensor. The invention can stabilize the reading performance, ameliorate the unstable defective reader sensor, and decrease the waste and the manufacturing cost. The present invention also discloses a magnetic head, a HGA and a disk drive unit.

摘要翻译： 读取器传感器包括第一屏蔽层，第二屏蔽层，在其间形成的读取元件和分别放置在读取元件两侧的一对永磁体层; 并且还包括在读取元件旁边形成的磁场产生装置，用于提供垂直于第一屏蔽层和第二屏蔽层的方向的磁场，从而稳定读取器传感器的读取性能。 本发明可以稳定阅读性能，改善不稳定的读卡器不稳定传感器，减少浪费和制造成本。 本发明还公开了一种磁头，HGA和盘驱动单元。

公开(公告)号：US20120158349A1

公开(公告)日：2012-06-21

申请号：US13064188

申请日：2011-03-09

申请人： Mankit Lee ,  Chiuming Lueng ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Mankit Lee ,  Chiuming Lueng ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G01K7/01 ,  G06F15/00

CPC分类号： G01K13/10 ,  B82Y25/00 ,  G01K7/36 ,  G01K15/005 ,  G01K2217/00 ,  G01R33/007 ,  G01R33/098 ,  H01F10/3254

摘要： A method for measuring the temperature rise induced by bias current/bias voltage in a magnetic tunnel junction, the method includes the steps of: (a) applying an external time-changing magnetic field to the magnetic tunnel junction; (b) measuring different first outer pin flip field values under different temperature values; (c) calculating the correlation between the temperature and the outer pin flip field according to the temperature values and the first outer pin flip field values; (d) measuring different second outer pin flip field values under different bias current/bias voltage values; (e) calculating the correlation between the bias current/bias voltage and the outer pin flip field according to the bias current/bias voltage values and the second outer pin flip field values; (f) calculating the correlation between the temperature and the bias current/bias voltage according to the results produced by the steps (c) and (e). The method of the present invention can obtain the correlation between the temperature and the bias current/bias voltage, thereby determining what kind of TMR reader design providing more stable and reliable reading performance especially under higher operational temperature.

摘要翻译： 一种用于测量由磁性隧道结中的偏置电流/偏置电压引起的升温的方法，所述方法包括以下步骤：（a）将外部时变磁场施加到磁性隧道结; （b）在不同的温度值下测量不同的第一外部引脚翻转场值; （c）根据温度值和第一外部引脚翻转场值计算温度和外部引脚翻转场之间的相关性; （d）在不同的偏置电流/偏置电压值下测量不同的第二外部引脚翻转电压值; （e）根据偏置电流/偏置电压值和第二外部引脚翻转值计算偏置电流/偏置电压与外部引脚翻转场之间的相关性; （f）根据步骤（c）和（e）产生的结果计算温度和偏置电流/偏置电压之间的相关性。 本发明的方法可以获得温度和偏置电流/偏置电压之间的相关性，从而确定什么样的TMR读取器设计提供更稳定和可靠的读取性能，特别是在较高的工作温度下。

公开(公告)号：US20110235214A1

公开(公告)日：2011-09-29

申请号：US12801518

申请日：2010-06-11

申请人： Chiuming Leung ,  Kosuke Tanaka ,  Kazuki Sato ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni ,  Wanyin Kwan ,  Mankit Lee

发明人： Chiuming Leung ,  Kosuke Tanaka ,  Kazuki Sato ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni ,  Wanyin Kwan ,  Mankit Lee

IPC分类号： G11B5/48 ,  G11B5/33

CPC分类号： G11B5/398 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3932

摘要： A MR sensor includes a first shielding layer, a second shielding layer, a MR element formed therebetween, and a pair of hard magnet layers respectively placed on two sides of the MR element. The MR element comprises an AFM layer formed on the first shielding layer, a pinned layer formed on the AFM layer and a free layer formed between the pinned layer and the second shielding layer. The free layer is funnel-shaped, which having a first edge facing the air bearing surface and a second edge opposite the first edge, and the first edge has a narrower width than that of the second edge. The structure of the MR sensor can improve MR height control performance, and improve the ESD performance and decrease the PCN and RTN and, in turn, get a more stable performance. The present invention also discloses a magnetic head, a HGA and a disk drive unit.

摘要翻译： MR传感器包括第一屏蔽层，第二屏蔽层，在其间形成的MR元件和分别放置在MR元件的两侧上的一对硬磁体层。 MR元件包括形成在第一屏蔽层上的AFM层，形成在AFM层上的钉扎层和形成在钉扎层和第二屏蔽层之间的自由层。 自由层是漏斗形的，其具有面向空气支承表面的第一边缘和与第一边缘相对的第二边缘，并且第一边缘具有比第二边缘窄的宽度。 MR传感器的结构可以提高MR高度控制性能，提高ESD性能，减少PCN和RTN，进而获得更稳定的性能。 本发明还公开了一种磁头，HGA和盘驱动单元。

公开(公告)号：US08767356B2

公开(公告)日：2014-07-01

申请号：US12801518

申请日：2010-06-11

申请人： Chiuming Leung ,  Kosuke Tanaka ,  Kazuki Sato ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni ,  Wanyin Kwan ,  Mankit Lee

发明人： Chiuming Leung ,  Kosuke Tanaka ,  Kazuki Sato ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni ,  Wanyin Kwan ,  Mankit Lee

IPC分类号： G11B5/39

CPC分类号： G11B5/398 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3932

摘要： An MR sensor includes a first shielding layer, a second shielding layer, an MR element formed therebetween, and a pair of hard magnet layers respectively placed on two sides of the MR element. The MR element includes an AFM layer formed on the first shielding layer, a pinned layer formed on the AFM layer and a free layer formed between the pinned layer and the second shielding layer. The free layer is funnel-shaped, which has a first edge facing an air bearing surface and a second edge opposite the first edge, and the first edge has a narrower width than that of the second edge. The MR sensor can improve MR height control performance, and improve the ESD performance and decrease the PCN and RTN and, in turn, get a more stable performance. The present invention also discloses a magnetic head, an HGA and a disk drive unit.

摘要翻译： MR传感器包括第一屏蔽层，第二屏蔽层，在其间形成的MR元件和分别放置在MR元件的两侧上的一对硬磁体层。 MR元件包括形成在第一屏蔽层上的AFM层，形成在AFM层上的钉扎层和形成在被钉扎层和第二屏蔽层之间的自由层。 自由层是漏斗形的，其具有面向空气轴承表面的第一边缘和与第一边缘相对的第二边缘，并且第一边缘具有比第二边缘窄的宽度。 MR传感器可以提高MR高度控制性能，提高ESD性能，减少PCN和RTN，进而获得更稳定的性能。 本发明还公开了一种磁头，HGA和盘驱动单元。

公开(公告)号：US08493683B2

公开(公告)日：2013-07-23

申请号：US13289399

申请日：2011-11-04

申请人： Chiu ming Lueng ,  Mankit Lee ,  Cheukwing Leung ,  Ju ren Ding ,  Rong kwang Ni

发明人： Chiu ming Lueng ,  Mankit Lee ,  Cheukwing Leung ,  Ju ren Ding ,  Rong kwang Ni

IPC分类号： G11B21/02 ,  G01R33/12

CPC分类号： G11B5/455

摘要： Measuring method of a magnetic head includes (a) placing the magnetic head at normal position, defining a first direction parallel to an air bearing surface and two shielding layers of the magnetic head, and defining a second direction perpendicular to the first direction; (b) tilting the magnetic head at an angle to the second direction, applying a plurality of first magnetic fields with different intensities in the first direction, and measuring out a first output parameter curve; (c) repeating the step (b) with different angles and measuring out a plurality of first output parameter curves; (d) calculating a plurality of pinned direction tilt ratios that a pinned direction of a pinned layer of the magnetic head tilts towards the second direction according to the parameter curves; and (e) calculating a pinned direction tilt angle that the pinned direction tilts towards the second direction according to the pinned direction tilting ratios.

摘要翻译： 磁头的测量方法包括（a）将磁头放置在正常位置，限定平行于空气支承表面的第一方向和磁头的两个屏蔽层，并限定垂直于第一方向的第二方向; （b）使磁头与第二方向成一角度倾斜，在第一方向施加多个具有不同强度的第一磁场，并测量第一输出参数曲线; （c）以不同的角度重复步骤（b）并测量多个第一输出参数曲线; （d）根据所述参数曲线计算所述磁头的被钉扎层的钉扎方向朝向所述第二方向倾斜的多个钉扎方向倾斜比; 以及（e）根据被钉扎方向倾斜比计算销钉方向朝向第二方向倾斜的钉扎方向倾斜角度。