公开(公告)号：US07372665B1

公开(公告)日：2008-05-13

申请号：US11039635

申请日：2005-01-18

申请人： Kroum S. Stoev ,  Suping Song ,  Tao Pan

发明人： Kroum S. Stoev ,  Suping Song ,  Tao Pan

IPC分类号： G11B5/147

CPC分类号： G11B5/6064 ,  G11B5/3133 ,  G11B5/607

摘要： A magnetic head includes a slider body having a trailing surface meeting an air-bearing surface at a trailing edge, with a thin-film transducer disposed on the trailing surface of the slider body near the trailing edge. The thin-film transducer includes a coil embedded between first and second poles. A resistive heating element is disposed adjacent and electrically insulated from, the coil. Application of power to the resistive heating element causes expansion of at least the first and second poles.

摘要翻译： 磁头包括滑块主体，其具有在后缘处会合空气轴承表面的后表面，薄片换能器设置在靠近后缘的滑块体的后表面上。 薄膜换能器包括嵌入在第一和第二极之间的线圈。 电阻加热元件设置成与线圈相邻并与之电绝缘。 对电阻加热元件的电力施加导致至少第一和第二极的膨胀。

公开(公告)号：US07349170B1

公开(公告)日：2008-03-25

申请号：US11414569

申请日：2006-04-28

申请人： Victor Rudman ,  Jagdeep S. Buttar ,  Yogesh P. Kharady ,  Tao Pan

发明人： Victor Rudman ,  Jagdeep S. Buttar ,  Yogesh P. Kharady ,  Tao Pan

IPC分类号： G11B21/02 ,  G11B27/36

CPC分类号： G11B5/6029 ,  G11B5/607

摘要： A method monitors operation of a disk drive. The method includes providing a disk drive which includes a rotating disk and a head having a read transducer in proximity to a surface of the disk and an adjustment mechanism which controllably adjusts an average relative spacing between the read transducer and the surface. The method further includes generating a read-back signal by reading from the surface using the read transducer. The read-back signal includes a high frequency carrier signal having an envelope that is modulated by a lower frequency signal. The method further includes varying the average relative spacing between the read transducer and the surface using the adjustment mechanism. The method further includes analyzing the envelope in the frequency domain and detecting an emergence of at least one frequency component of the envelope within an air bearing resonance range of frequencies.

摘要翻译： 一种方法监视磁盘驱动器的操作。 该方法包括提供一种磁盘驱动器，其包括旋转盘和具有接近盘的表面的读换能器的头以及可调节地调节读换能器与表面之间的平均相对间距的调节机构。 该方法还包括通过使用读取换能器从表面读取来产生回读信号。 回读信号包括具有由较低频率信号调制的包络的高频载波信号。 该方法还包括使用调节机构来改变读取换能器与表面之间的平均相对间隔。 该方法还包括分析频域中的包络并且检测在空气轴承共振频率范围内的包络的至少一个频率分量的出现。

公开(公告)号：US07280325B1

公开(公告)日：2007-10-09

申请号：US10816158

申请日：2004-03-31

申请人： Tao Pan

发明人： Tao Pan

IPC分类号： G11B5/39

CPC分类号： G11B5/3932 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3912 ,  G11B2005/3996

摘要： A CPP magnetic sensor is disclosed with a ferromagnetic layer that extends in a first direction a first distance; a nonferromagnetic spacer layer that adjoins the ferromagnetic layer and extends in the first direction a second distance that is substantially equal to the first distance; and a ferromagnetic structure that is separated from the ferromagnetic layer by the spacer layer, the ferromagnetic structure having a first section that extends in the first direction a third distance that is substantially equal to the second distance, the ferromagnetic structure having a second section that is disposed further than the first section from the spacer layer, the second section extending at least twice as far as the first section in the first direction. The ferromagnetic structure can be used for in-stack bias or pinning of free or pinned layers, respectively, and side shields can be provided for high areal density.

摘要翻译： 公开了一种CPP磁传感器，其具有在第一方向上延伸第一距离的铁磁层; 邻接所述铁磁层并沿所述第一方向延伸第二距离的非铁磁间隔层，所述第二距离基本上等于所述第一距离; 以及铁磁结构，其通过所述间隔层与所述铁磁层分离，所述铁磁结构具有第一部分，所述第一部分沿所述第一方向延伸第三距离，所述第三距离基本上等于所述第二距离，所述铁磁结构具有第二部分， 所述第二部分比所述间隔层的所述第一部分更远，所述第二部分在所述第一方向上延伸至少所述第一部分的两倍。 铁磁结构可分别用于堆叠偏压或自由或固定层的钉扎，并且可以提供侧面屏蔽以实现高密度。

公开(公告)号：US07161773B2

公开(公告)日：2007-01-09

申请号：US11075079

申请日：2005-03-07

申请人： Robert Edward Fontana, Jr. ,  Kuok San Ho ,  Tao Pan ,  Ching Hwa Tsang

发明人： Robert Edward Fontana, Jr. ,  Kuok San Ho ,  Tao Pan ,  Ching Hwa Tsang

IPC分类号： G11B5/39 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T29/49044 ,  Y10T29/49046

摘要： Several embodiments of a sense current perpendicular to the planes of the sensor (CPP) and flux guide type of read head has a gap between first and second shield layers at an air bearing surface (ABS) where the flux guide is located which is less than a gap between the first and second shield layers at a recessed location where the sensor is located. This reduced gap increases the linear bit density capability of the read head. A longitudinal bias stack (LBS) is located in the sensor stack. Several unique methods of construction are described for forming the magnetic head assemblies.

摘要翻译： 垂直于传感器（CPP）的平面的感测电流和读取头的通量引导类型的几个实施例在通量指示器所在的空气轴承表面（ABS）处具有小于第一和第二屏蔽层的空隙 第一和第二屏蔽层之间在传感器所在的凹陷位置处的间隙。 这种减小的间隙增加了读取头的线性位密度能力。 纵向偏置堆栈（LBS）位于传感器堆叠中。 描述了用于形成磁头组件的几种独特的结构方法。

公开(公告)号：US07036208B2

公开(公告)日：2006-05-02

申请号：US10675514

申请日：2003-09-30

申请人： Kuok San Ho ,  Tao Pan

发明人： Kuok San Ho ,  Tao Pan

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3916 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A magnetoresistive sensor for use in a data storage device has a recessed sensing element (magnetic tunnel junction, CPP spin valve, etc.) with an exchange biased sensing ferromagnetic (free) layer, and a flux guide that magnetically connects the sensing element to a sensing surface of the sensor. The free layer is selectively exchange biased by a layer of exchange bias material placed under non-active regions of the free layer that lie outside the sensing element and flux guide track widths. The flux guide is provided by extending the free layer from a forward edge of the sensing element to the sensor surface. Advantageously, the sensing element and the flux guide have equal track width so that magnetic flux directed from the flux guide into the sensing element is not diluted with consequent loss of sensitivity.

公开(公告)号：US20050183946A1

公开(公告)日：2005-08-25

申请号：US11100864

申请日：2005-04-06

申请人： Tao Pan ,  Richard Demaray ,  Yu Chen ,  Yong Xie ,  Rajiv Pethe

发明人： Tao Pan ,  Richard Demaray ,  Yu Chen ,  Yong Xie ,  Rajiv Pethe

IPC分类号： C23C14/04 ,  G02B6/12 ,  G02B6/122 ,  G02B6/132 ,  C23C14/32

CPC分类号： C23C14/044 ,  G02B6/1228 ,  G02B6/132 ,  G02B2006/12195

摘要： A process for forming a mode size converter with an out-of-plane taper formed during deposition with a shadow mask is disclosed. Mode-size converters according to the present invention can have any number of configurations. Measured coupling efficiencies for waveguides with mode size converters according to the present invention show marked improvement.

公开(公告)号：US06754056B2

公开(公告)日：2004-06-22

申请号：US10054656

申请日：2002-01-18

申请人： Kuok San Ho ,  Tao Pan

发明人： Kuok San Ho ,  Tao Pan

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T29/49044

摘要： Longitudinal biasing of a free layer in a current perpendicular to the planes of the layers (CPP) type of sensor in a read head is implemented by pinning magnetic moments of first and second side portions of the free layer beyond the track width of the read head with first and second insulating antiferromagnetic (AFM) layers which are exchange coupled thereto. The pinning of the magnetic moments of the first and second side portions of the free layer pin and longitudinally bias the central active portion of the free layer within the track width so that the central portion of the free layer is magnetically stable.

摘要翻译： 通过将自由层的第一和第二侧部分的磁矩固定在读取磁头的磁道宽度上来实现垂直于读取头中的层（CPP）类型的传感器平面的电流中的自由层的纵向偏置 具有与其交换耦合的第一和第二绝缘反铁磁（AFM）层。 自由层销的第一和第二侧面部分的磁矩的钉扎，并且将自由层的中心有效部分纵向偏置在轨道宽度内，使得自由层的中心部分是磁性稳定的。