公开(公告)号：US06697294B1

公开(公告)日：2004-02-24

申请号：US10055118

申请日：2002-01-22

申请人： Qiuqun Qi ,  Xizeng Shi ,  Matthew R. Gibbons

发明人： Qiuqun Qi ,  Xizeng Shi ,  Matthew R. Gibbons

IPC分类号： G11C702

CPC分类号： G11C11/16

摘要： A reference cell circuit for a magnetic tunnel junction MRAM includes two magnetic tunnel junctions where one is always set to a low resistance state and the other is always set to a high resistance state. The two magnetic tunnel junctions are connected between two segments of a bit line. The reference cell also includes a digit line that crosses both of the bit line segments.

摘要翻译： 用于磁隧道结MRAM的参考单元电路包括两个磁隧道结，其中一个总是设置为低电阻状态，另一个总是设置为高电阻状态。 两个磁隧道结连接在位线的两段之间。 参考单元还包括穿过两个位线段的数字线。

公开(公告)号：US06721203B1

公开(公告)日：2004-04-13

申请号：US10017647

申请日：2001-12-12

申请人： Qiuqun Qi ,  Xizeng Shi ,  Matthew R. Gibbons

发明人： Qiuqun Qi ,  Xizeng Shi ,  Matthew R. Gibbons

IPC分类号： G11C1115

CPC分类号： G11C11/16

摘要： A reference cell circuit for a magnetic tunnel junction MRAM includes a first magnetic tunnel junction device set to a low resistance state and a second magnetic tunnel junction device set to a high resistance state. A reference cell series unit includes the first magnetic tunnel junction device electrically coupled in series with the second magnetic tunnel junction device. The reference cell series unit further has a first end and a second end with the first end being electrically coupled to a first current source and the second end being electrically coupled to a current sink and a second current source.

摘要翻译： 用于磁性隧道结MRAM的参考单元电路包括设置为低电阻状态的第一磁性隧道结器件和设置为高电阻状态的第二磁性隧道结器件。 参考单元串联单元包括与第二磁隧道结装置串联电耦合的第一磁性隧道结装置。 参考单元串联单元还具有第一端和第二端，其第一端电耦合到第一电流源，并且第二端电耦合到电流吸收器和第二电流源。

公开(公告)号：US06721138B1

公开(公告)日：2004-04-13

申请号：US09999694

申请日：2001-10-24

申请人： Yingjian Chen ,  Xizeng Shi ,  Hugh Craig Hiner ,  Zi-Wen Dong ,  Francis Liu ,  Matthew R. Gibbons ,  Joyce Anne Thompson ,  William D. Jensen ,  Chester Xiaowen Chien ,  Yugang Wang

发明人： Yingjian Chen ,  Xizeng Shi ,  Hugh Craig Hiner ,  Zi-Wen Dong ,  Francis Liu ,  Matthew R. Gibbons ,  Joyce Anne Thompson ,  William D. Jensen ,  Chester Xiaowen Chien ,  Yugang Wang

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3153 ,  G11B5/3163 ,  G11B5/3909 ,  G11B5/3967 ,  G11B2005/3996

摘要： An inductive transducer having first and second magnetic pedestals disposed between first and second magnetic pole layers and adjacent to a media-facing surface, the pedestals separated by a submicron, nonmagnetic gap. The first pedestal extends less than the second pedestal from the media-facing surface, defining a short throat height. The second pedestal extends further to provide sufficient area for stitching to the second pole layer. The stitching and the thickness provided by the pedestals allow plural coil layers to be disposed between the pole layers, and the second pedestal, as well as other features, can be defined by high-resolution photolithography. The two coil layers have lower resistance, lower inductance and allow the pole layers to be shorter, improving performance. All or part of either or both of the pedestals may be formed of high magnetic saturation material, further enhancing performance.

摘要翻译： 一种感应换能器，其具有设置在第一和第二磁极层之间并且邻近介质面向表面的第一和第二磁性基座，所述基座由亚微米非磁性间隙分开。 第一基座从面向介质的表面延伸小于第二基座，限定短的喉部高度。 第二基座进一步延伸以提供足够的面积用于缝合到第二极层。 由基座提供的缝合和厚度允许在极层之间设置多个线圈层，并且第二基座以及其它特征可以通过高分辨率光刻来定义。 两个线圈层具有较低的电阻，较低的电感，并允许极层更短，从而提高性能。 基座中的一个或两个的全部或一部分可以由高磁饱和材料形成，进一步提高性能。

公开(公告)号：US08526275B1

公开(公告)日：2013-09-03

申请号：US13458949

申请日：2012-04-27

申请人： Hongxing Yuan ,  Zhongyan Wang ,  Wentao Yan ,  Yanfeng Chen ,  Matthew R. Gibbons ,  Zhong Shi

发明人： Hongxing Yuan ,  Zhongyan Wang ,  Wentao Yan ,  Yanfeng Chen ,  Matthew R. Gibbons ,  Zhong Shi

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： Embodiments of the present invention are directed to a recording head for energy assisted magnetic recording. The recording head includes a near-field transducer (NFT) having a preselected shape and a surface, a writing pole on the NFT, and a non-metal heat dissipator positioned between the NFT surface and the writing pole. The non-metal heat dissipator includes a first portion in contact with the NFT surface, the first portion extending beyond an edge of the NFT surface in a first direction substantially perpendicular to an air bearing surface (ABS) and parallel to the NFT surface.

摘要翻译： 本发明的实施例涉及一种用于能量辅助磁记录的记录头。 记录头包括具有预选形状和表面的近场传感器（NFT），NFT上的书写杆和位于NFT表面和书写杆之间的非金属散热器。 非金属散热器包括与NFT表面接触的第一部分，第一部分在大致垂直于空气轴承表面（ABS）并平行于NFT表面的第一方向上延伸超过NFT表面的边缘。

公开(公告)号：US09153260B1

公开(公告)日：2015-10-06

申请号：US13419313

申请日：2012-03-13

申请人： Steven C. Rudy ,  Matthew R. Gibbons ,  Curtis V. Macchioni ,  Yun-Fei Li ,  Changhe Shang ,  Carlos Corona

发明人： Steven C. Rudy ,  Matthew R. Gibbons ,  Curtis V. Macchioni ,  Yun-Fei Li ,  Changhe Shang ,  Carlos Corona

IPC分类号： G11B5/31 ,  G11B5/455

CPC分类号： G11B5/455 ,  G11B5/3166 ,  G11B5/3169 ,  Y10T29/49036 ,  Y10T29/49037 ,  Y10T29/49041 ,  Y10T29/49048

摘要： A slider includes a transducer including a magnetic structure having a front edge and a back edge. The slider further includes an electronic lapping guide (ELG) substantially coplanar with the magnetic structure and having a top edge and a bottom edge. The slider further includes a plurality of pads configured to calibrate a sheet resistance of the ELG and an offset of the ELG.

摘要翻译： 滑块包括具有前缘和后缘的磁结构的换能器。 滑块还包括与磁性结构基本上共面并具有顶部边缘和底部边缘的电子研磨导向器（ELG）。 滑块还包括多个衬垫，其被配置成校准ELG的薄层电阻和ELG的偏移。

公开(公告)号：US07872824B1

公开(公告)日：2011-01-18

申请号：US11761266

申请日：2007-06-11

申请人： Curtis V. Macchioni ,  Jonas A. Goode ,  Matthew R. Gibbons ,  Tao Pan ,  Andrei F. Khapikov

发明人： Curtis V. Macchioni ,  Jonas A. Goode ,  Matthew R. Gibbons ,  Tao Pan ,  Andrei F. Khapikov

IPC分类号： G11B5/03

CPC分类号： G11B5/02 ,  G11B5/6005 ,  G11B5/6064 ,  G11B2005/0018

摘要： A disk drive is disclosed having a disk, and a head actuated over the disk, the head comprising a magnetoresistive (MR) element. Control circuitry within the disk drive sets an operating bias current for the MR element by computing a target voltage for the MR element, applying a bias current to the MR element, measuring a voltage across the MR element corresponding to the bias current, and adjusting the bias current applied to the MR element until the measured voltage substantially equals the target voltage.

摘要翻译： 公开了一种盘驱动器，其具有盘，并且在盘上致动的头，头包括磁阻（MR）元件。 磁盘驱动器内的控制电路通过计算MR元件的目标电压为MR元件设置工作偏置电流，向MR元件施加偏置电流，测量对应于偏置电流的MR元件两端的电压，并调整 施加到MR元件的偏置电流，直到测量的电压基本上等于目标电压。

公开(公告)号：US08619512B1

公开(公告)日：2013-12-31

申请号：US13531380

申请日：2012-06-22

申请人： Hongxing Yuan ,  Zhongyan Wang ,  Wentao Yan ,  Matthew R. Gibbons ,  Michael V. Morelli

发明人： Hongxing Yuan ,  Zhongyan Wang ,  Wentao Yan ,  Matthew R. Gibbons ,  Michael V. Morelli

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/3136 ,  G11B5/3163 ,  G11B2005/0021

摘要： An energy assisted magnetic recording (EAMR) head having a stress buffer for reducing the stress on a near-field transducer during thermal expansion and methods for fabricating the EAMR head are provided. The EAMR head includes a waveguide, a near-field transducer (NFT) configured to receive optical energy from the waveguide, and a cladding of the waveguide has an opening. The NFT is positioned within the opening, and an air gap is formed between the NFT and a side wall of the opening.

摘要翻译： 提供了一种具有用于在热膨胀期间减小近场换能器上的应力的应力缓冲器的能量辅助磁记录（EAMR）头和用于制造EAMR头的方法。 EAMR头包括波导，被配置为从波导接收光能的近场换能器（NFT），并且波导的包层具有开口。 NFT位于开口内，并且在NFT和开口的侧壁之间形成气隙。

公开(公告)号：US08462592B1

公开(公告)日：2013-06-11

申请号：US12948425

申请日：2010-11-17

申请人： Christopher B. Wolf ,  Eric J. Champion ,  Kroum S. Stoev ,  Matthew R. Gibbons

发明人： Christopher B. Wolf ,  Eric J. Champion ,  Kroum S. Stoev ,  Matthew R. Gibbons

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A method and system for providing an EAMR transducer is described. The EAMR transducer has an ABS and is coupled with a laser. The EAMR transducer includes a write pole, coil(s), and an energy delivery device. The write pole magnetically writes to the media. The coil(s) energize the write pole. The energy delivery device is optically coupled with the laser and includes a top distal from the ABS, a bottom proximate to the ABS, a first side, and a second side opposite to the first side. The first side has a first apex angle from a normal to the ABS and is reflective. The second side has a second apex angle from the normal and is reflective. The first and second apex angles are each at least three and not more than twenty-five degrees. The first and second sides converge such that the top is wider than the bottom.

摘要翻译： 描述了一种用于提供EAMR换能器的方法和系统。 EAMR传感器具有ABS并与激光器耦合。 EAMR传感器包括写极，线圈和能量输送装置。 写磁极写入介质。 线圈使写入极点通电。 能量输送装置与激光器光学耦合，并且包括远离ABS的顶部，靠近ABS的底部，第一侧和与第一侧相对的第二侧。 第一侧具有从法线到ABS的第一顶角，并且是反射性的。 第二面具有与法线的第二顶角并且是反射的。 第一和第二顶角各自为至少三个而不多于二十五度。 第一和第二侧会聚，使得顶部比底部更宽。

公开(公告)号：US08441909B1

公开(公告)日：2013-05-14

申请号：US13418843

申请日：2012-03-13

申请人： Pradeep K. Thayamballi ,  Wentao Yan ,  Matthew R. Gibbons ,  Dennis W. Hogg

发明人： Pradeep K. Thayamballi ,  Wentao Yan ,  Matthew R. Gibbons ,  Dennis W. Hogg

IPC分类号： G11B7/00 ,  G11B11/00

CPC分类号： G11B5/40 ,  G11B5/607 ,  G11B2005/0021

摘要： A disk drive is disclosed comprising a disk comprising a plurality of data tracks, wherein each data track comprises a plurality of data sectors. A head is actuated over the disk, wherein the head comprises a laser operable to heat the disk while writing data to the disk. When a write command is received to write data to a target data sector of a target data track, the head is positioned over the target data track. When the head reaches the target data sector, a power applied to the laser is increased to above a steady state value to compensate for a high fly height of the head. The power applied to the laser is decreased toward the steady state value while writing at least part of the data to the target data sector.

摘要翻译： 公开了一种磁盘驱动器，其包括包括多个数据磁道的磁盘，其中每个数据磁道包括多个数据扇区。 头部被驱动在盘上，其中头部包括可操作的加热盘的激光器，同时将数据写入到盘中。 当接收到写入命令以将数据写入目标数据轨道的目标数据扇区时，头部位于目标数据轨道上方。 当头到达目标数据扇区时，施加到激光器的功率增加到高于稳态值，以补偿头的高飞高。 施加到激光器的功率朝向稳态值减小，同时将至少部分数据写入目标数据扇区。

公开(公告)号：US08310901B1

公开(公告)日：2012-11-13

申请号：US12796806

申请日：2010-06-09

申请人： Sharat Batra ,  Adam F. Torabi ,  Matthew R. Gibbons ,  Yugang Wang ,  Kroum S. Stoev

发明人： Sharat Batra ,  Adam F. Torabi ,  Matthew R. Gibbons ,  Yugang Wang ,  Kroum S. Stoev

IPC分类号： G11B11/00

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： An energy assisted magnetic recording (EAMR) transducer coupled with a laser is described. The EAMR transducer has an air-bearing surface (ABS) residing near a media during use. The EAMR transducer includes optical and writer modules. The optical module includes a waveguide and a near field transducer (NFT). The waveguide directs the energy from the laser toward the ABS. The NFT focuses the energy onto the media. The optical and writer modules are physically separate such that no portion of the waveguide is interleaved with a magnetic portion of the writer module. The writer module includes a write pole and coil(s). The write pole includes a pole-tip portion for providing a magnetic field to the media and a yoke. The pole-tip portion has an ABS-facing surface, a sloped surface, and a NFT-facing surface therebetween. The sloped surface is at least twenty-five and not more than sixty-five degrees from the NFT-facing surface.

摘要翻译： 描述了与激光器耦合的能量辅助磁记录（EAMR）传感器。 在使用过程中，EAMR传感器具有驻留在介质附近的空气轴承表面（ABS）。 EAMR传感器包括光学和写入器模块。 光学模块包括波导和近场换能器（NFT）。 波导将能量从激光器引向ABS。 NFT将能量集中在媒体上。 光学和写入器模块是物理上分离的，使得波导的任何部分与写入器模块的磁性部分交错。 写入器模块包括一个写入极和线圈。 写极包括用于向介质和磁轭提供磁场的极尖部分。 极尖部分具有面向ABS的表面，倾斜表面和它们之间的面向NFT的表面。 倾斜表面距离面向NFT的表面至少二十五度且不超过六十五度。