公开(公告)号：US09899046B2

公开(公告)日：2018-02-20

申请号：US13064993

申请日：2011-04-29

申请人： Cheukman Lui ,  Chiuming Lueng ,  Hokei Lam ,  Mankit Lee ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Cheukman Lui ,  Chiuming Lueng ,  Hokei Lam ,  Mankit Lee ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G11B5/455 ,  G11B20/18 ,  G11B27/36 ,  G01R33/12

CPC分类号： G11B5/455 ,  G01R33/1207 ,  G11B5/4555 ,  G11B20/1816 ,  G11B27/36

摘要： A method of testing anti-high temperature performance of a magnetic head comprises applying a plurality of second magnetic fields with different intensities in a second direction to the magnetic head, and measuring a second output parameter curve, and judging whether a variation that is beyond an allowable value is presented on the second output parameter curve, therein the second direction passes through the ABS and at an angle whose absolute value is an acute angle to the ABS. The present invention can screen out defective magnetic heads that possess poor anti-high temperature performance without heating the magnetic head.

公开(公告)号：US20120275047A1

公开(公告)日：2012-11-01

申请号：US13064993

申请日：2011-04-29

申请人： Cheukman Lui ,  Chiuming Lueng ,  Hokei Lam ,  Mankit Lee ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Cheukman Lui ,  Chiuming Lueng ,  Hokei Lam ,  Mankit Lee ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G11B27/36

CPC分类号： G11B5/455 ,  G01R33/1207 ,  G11B5/4555 ,  G11B20/1816 ,  G11B27/36

摘要： A method of testing anti-high temperature performance of a magnetic head comprises applying a plurality of second magnetic fields with different intensities in a second direction to the magnetic head, and measuring a second output parameter curve, and judging whether a variation that is beyond an allowable value is presented on the second output parameter curve, therein the second direction passes through the ABS and at an angle whose absolute value is an acute angle to the ABS. The present invention can screen out defective magnetic heads that possess poor anti-high temperature performance without heating the magnetic head.

摘要翻译： 一种测试磁头的抗高温性能的方法包括：向第二方向施加具有不同强度的多个第二磁场到磁头，以及测量第二输出参数曲线，并且判断是否超出 允许值呈现在第二输出参数曲线上，其中第二方向穿过ABS并以与ABS绝对值成锐角的角度相交。 本发明可以在不加热磁头的情况下屏蔽具有差的抗高温性能的有缺陷的磁头。

公开(公告)号：US20120274317A1

公开(公告)日：2012-11-01

申请号：US13064994

申请日：2011-04-29

申请人： Chiuming Lueng ,  Cheukman Lui ,  Mankit Lee ,  Hokei Lam ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Cheukman Lui ,  Mankit Lee ,  Hokei Lam ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G01R33/12

CPC分类号： G01R33/1207 ,  B82Y25/00 ,  G01R33/12 ,  G11B5/455 ,  G11B5/4555 ,  G11B27/36

摘要： A method of testing anti-high temperature performance of a magnetic head comprises applying a second magnetic field with different intensities in a second direction and the changing first magnetic fields in a first direction, and measuring a plurality of second output parameter curves; and judging whether a variation that is beyond an allowable value is presented on the second output parameter curves, thereby screening out a defective magnetic head, therein the first direction is perpendicular to the air bearing surface of the magnetic head, and the second direction is perpendicular to the shielding layers of the magnetic head. The present invention can screen out defective magnetic heads that possess poor anti-high temperature performance without heating the magnetic head and with high precision.

摘要翻译： 一种测试磁头的抗高温性能的方法包括：在第二方向施加不同强度的第二磁场，并在第一方向上改变第一磁场，并测量多个第二输出参数曲线; 并且判断在所述第二输出参数曲线上是否存在超出允许值的变化，从而筛选出所述第一方向上的有缺陷的磁头垂直于所述磁头的所述空气支承表面，并且所述第二方向垂直 到磁头的屏蔽层。 本发明可以在不加热磁头的情况下高精度地筛选出具有差的抗高温性能的有缺陷的磁头。

公开(公告)号：US09121888B2

公开(公告)日：2015-09-01

申请号：US13064994

申请日：2011-04-29

申请人： Chiuming Lueng ,  Cheukman Lui ,  Mankit Lee ,  Hokei Lam ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Cheukman Lui ,  Mankit Lee ,  Hokei Lam ,  Kwokkam Leung ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G01R33/12 ,  G11B5/455 ,  B82Y25/00 ,  G11B27/36

CPC分类号： G01R33/1207 ,  B82Y25/00 ,  G01R33/12 ,  G11B5/455 ,  G11B5/4555 ,  G11B27/36

摘要： A method of testing anti-high temperature performance of a magnetic head comprises applying a second magnetic field with different intensities in a second direction and the changing first magnetic fields in a first direction, and measuring a plurality of second output parameter curves; and judging whether a variation that is beyond an allowable value is presented on the second output parameter curves, thereby screening out a defective magnetic head, therein the first direction is perpendicular to the air bearing surface of the magnetic head, and the second direction is perpendicular to the shielding layers of the magnetic head. The present invention can screen out defective magnetic heads that possess poor anti-high temperature performance without heating the magnetic head and with high precision.

摘要翻译： 一种测试磁头的抗高温性能的方法包括：在第二方向施加不同强度的第二磁场，并在第一方向上改变第一磁场，并测量多个第二输出参数曲线; 并且判断在所述第二输出参数曲线上是否存在超出允许值的变化，从而筛选出所述第一方向上的有缺陷的磁头垂直于所述磁头的所述空气支承表面，并且所述第二方向垂直 到磁头的屏蔽层。 本发明可以在不加热磁头的情况下高精度地筛选出具有差的抗高温性能的有缺陷的磁头。

公开(公告)号：US08664950B2

公开(公告)日：2014-03-04

申请号：US13067887

申请日：2011-07-01

申请人： Siuman Mok ,  Hokei Lam ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni ,  Wanyin Kwan ,  Cheukman Lui ,  Chiuming Lueng

发明人： Siuman Mok ,  Hokei Lam ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni ,  Wanyin Kwan ,  Cheukman Lui ,  Chiuming Lueng

IPC分类号： G01R33/12

CPC分类号： G01R33/098

摘要： A method for measuring longitudinal bias magnetic field in a tunnel magnetoresistive sensor of a magnetic head, the method includes the steps of: applying an external longitudinal time-changing magnetic field onto the tunnel magnetoresistive sensor; determining a shield saturation value of the tunnel magnetoresistive sensor under the application of the external longitudinal time-changing magnetic field; applying an external transverse time-changing magnetic field and an external longitudinal DC magnetic field onto the tunnel magnetoresistive sensor; determining a plurality of different output amplitudes under the application of the external transverse time-changing magnetic field and the application of different field strength values of the external longitudinal DC magnetic field; plotting a graph according to the different output amplitudes and the different field strength values; and determining the strength of the longitudinal bias magnetic field according to the graph and the shield saturation value.

摘要翻译： 一种用于测量磁头的隧道磁阻传感器中的纵向偏置磁场的方法，所述方法包括以下步骤：将外部纵向时变磁场施加到隧道磁阻传感器上; 在外部纵向时变磁场的应用下，确定隧道磁阻传感器的屏蔽饱和度值; 将外部横向时变磁场和外部纵向直流磁场施加到隧道磁阻传感器上; 在外部横向时变磁场的应用和外部纵向直流磁场的不同场强值的应用中确定多个不同的输出幅度; 根据不同的输出幅度和不同的场强值绘制图形; 并根据曲线图和屏蔽饱和度值确定纵向偏置磁场的强度。

公开(公告)号：US08984738B2

公开(公告)日：2015-03-24

申请号：US13402061

申请日：2012-02-22

申请人： Chiuming Lueng ,  Mankit Lee ,  Lorest Garcia Pingul ,  Yasutoshi Fujita ,  Cheukman Lui ,  ChiYuen Mok ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Mankit Lee ,  Lorest Garcia Pingul ,  Yasutoshi Fujita ,  Cheukman Lui ,  ChiYuen Mok ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/3169 ,  G11B5/102 ,  G11B5/3173 ,  Y10T29/49025 ,  Y10T29/49034 ,  Y10T29/49041

摘要： A manufacturing method of a slider includes steps of (a) providing a row bar with a plurality of slider elements connecting together, the row bar having an air bearing surface, a back surface opposite the air bearing surface, a bonding surface and a bottom surface opposite the bonding surface; (b) grinding the bottom surface of the row bar; (c) lapping the air bearing surface of the row bar so as to obtain a predetermined requirement, and applying a first magnetic field with a first direction during lapping the air bearing surface, and the first direction being parallel to the air bearing surface and the bonding surface; and (d) cutting the row bar into a plurality of individual sliders. The present invention can maintain a good performance of a magnetic head during the manufacturing process.

摘要翻译： 滑块的制造方法包括以下步骤：（a）提供具有连接在一起的多个滑动元件的行杆，所述排条具有空气轴承表面，与空气支承表面相对的后表面，接合表面和底表面 与粘结面相对; （b）研磨排条的底面; （c）研磨行杆的空气轴承表面以获得预定要求，并且在研磨空气轴承表面时施加具有第一方向的第一磁场，并且第一方向平行于空气轴承表面和 粘合面; 和（d）将行条切割成多个单独的滑块。 本发明可以在制造过程中保持磁头的良好性能。

公开(公告)号：US20130219699A1

公开(公告)日：2013-08-29

申请号：US13408063

申请日：2012-02-29

申请人： Chiuming Lueng ,  Mankit Lee ,  Lorest Garcia Pingul ,  Yasutoshi Fujita ,  Cheukman Lui ,  ChiYuen Mok ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Mankit Lee ,  Lorest Garcia Pingul ,  Yasutoshi Fujita ,  Cheukman Lui ,  ChiYuen Mok ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： B24B37/00 ,  B24B37/34 ,  H05K13/00

CPC分类号： B24B37/048 ,  Y10T29/49048

摘要： A manufacturing method of a slider includes steps of: (a) providing a row bar with a plurality of slider elements connecting together; (b) lapping surfaces of the row bar so as to obtain a predetermined requirement; (c) lowering the temperature of the surfaces lapped in the step (b) before and/or during lapping; and (d) cutting the row bar into a plurality of sliders. The present invention can prevent a local high temperature generated on the magnetic head during lapping so that the performance of the magnetic head is improved.

摘要翻译： 滑块的制造方法包括以下步骤：（a）提供具有连接在一起的多个滑块元件的行杆; （b）研磨排条的表面以获得预定的要求; （c）在研磨之前和/或期间降低在步骤（b）中研磨的表面的温度; 和（d）将行条切割成多个滑块。 本发明可以防止在研磨期间在磁头上产生的局部高温，从而提高磁头的性能。

公开(公告)号：US20130212871A1

公开(公告)日：2013-08-22

申请号：US13402061

申请日：2012-02-22

申请人： Chiuming Lueng ,  Mankit Lee ,  Lorest Garcia Pingul ,  Yasutoshi Fujita ,  Cheukman Lui ,  ChiYuen Mok ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

发明人： Chiuming Lueng ,  Mankit Lee ,  Lorest Garcia Pingul ,  Yasutoshi Fujita ,  Cheukman Lui ,  ChiYuen Mok ,  Cheukwing Leung ,  Juren Ding ,  Rongkwang Ni

IPC分类号： B24B19/00 ,  B24B37/00 ,  B23P13/00

CPC分类号： G11B5/3169 ,  G11B5/102 ,  G11B5/3173 ,  Y10T29/49025 ,  Y10T29/49034 ,  Y10T29/49041

摘要： A manufacturing method of a slider includes steps of (a) providing a row bar with a plurality of slider elements connecting together, the row bar having an air bearing surface, a back surface opposite the air bearing surface, a bonding surface and a bottom surface opposite the bonding surface; (b) grinding the bottom surface of the row bar; (c) lapping the air bearing surface of the row bar so as to obtain a predetermined requirement, and applying a first magnetic field with a first direction during lapping the air bearing surface, and the first direction being parallel to the air bearing surface and the bonding surface; and (d) cutting the row bar into a plurality of individual sliders. The present invention can maintain a good performance of a magnetic head during the manufacturing process.

摘要翻译： 滑块的制造方法包括以下步骤：（a）提供具有连接在一起的多个滑动元件的行杆，所述排条具有空气轴承表面，与空气支承表面相对的后表面，接合表面和底表面 与粘结面相对; （b）研磨排条的底面; （c）研磨行杆的空气轴承表面以获得预定要求，并且在研磨空气轴承表面时施加具有第一方向的第一磁场，并且第一方向平行于空气轴承表面和 粘合面; 和（d）将行条切割成多个单独的滑块。 本发明可以在制造过程中保持磁头的良好性能。

公开(公告)号：US08935132B2

公开(公告)日：2015-01-13

申请号：US13368762

申请日：2012-02-08

申请人： Hokei Lam ,  Cheukman Lui ,  Chiuming Lueng ,  Kaichiu Cheung ,  Wahchun Chan ,  Juren Ding ,  Rongkwang Ni

发明人： Hokei Lam ,  Cheukman Lui ,  Chiuming Lueng ,  Kaichiu Cheung ,  Wahchun Chan ,  Juren Ding ,  Rongkwang Ni

IPC分类号： G06F17/10 ,  G11B5/455 ,  G11B19/04

CPC分类号： G11B5/455 ,  G11B19/048

摘要： A spectral simulation method during a noise testing for a magnetic head, includes steps of (a1) detecting several first noise profiles for several magnetic head samples under a first frequency bandwidth range by a dynamic testing machine; (b1) separating each first noise profile into at least two noise curves including a first noise curve and a second noise curve at a predetermined frequency bandwidth, wherein the first noise curve has a frequency bandwidth range lower than that of the second noise curve; (c1) fitting several mathematical equations according to the second noise curves; and (d1) establishing a correlative equation among the mathematical equations, so as to simulate the second noise curve for each magnetic head. The present invention can simulate a second noise curve of the noise profile in a higher frequency bandwidth and establishing the correlative equation according to the second noise curve.

摘要翻译： 在磁头的噪声测试期间的光谱模拟方法包括以下步骤：（a1）通过动态测试机检测在第一频率带宽范围内的几个磁头样本的几个第一噪声分布; （b1）将每个第一噪声分布分解成包括预定频率带宽的第一噪声曲线和第二噪声曲线的至少两个噪声曲线，其中所述第一噪声曲线具有低于所述第二噪声曲线的频带宽度范围; （c1）根据第二噪声曲线拟合几个数学方程; 和（d1）在数学方程之间建立相关方程，以便模拟每个磁头的第二噪声曲线。 本发明可以模拟较高频带宽噪声分布的第二噪声曲线，并根据第二噪声曲线建立相关方程。