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    Thermally assisted magnetic recording system and method of writing using magnetic and thermal gradients
    1.
    发明授权
    Thermally assisted magnetic recording system and method of writing using magnetic and thermal gradients 有权
    热辅助磁记录系统和使用磁和热梯度的写入方法

    公开(公告)号：US06950260B2

    公开(公告)日：2005-09-27

    申请号：US09874673

    申请日：2001-06-04

    申请人： Kevin Robert Coffey ,  Robert Edward Fontana, Jr. ,  Jan-Ulrich Thiele

    发明人： Kevin Robert Coffey ,  Robert Edward Fontana, Jr. ,  Jan-Ulrich Thiele

    IPC分类号： G11B5/02 ,  G11B5/55 ,  G11B5/596 ,  G11B27/36

    CPC分类号： G11B5/02 ,  G11B5/5521 ,  G11B5/59683

    摘要： A magnetic recording system is provided having a write head employing a combination of magnetic write field gradient and thermal gradient to write data on a ‘thermal spring’ magnetic recording media. The write head comprises a magnetic element using a write current to induce a magnetic write field at the magnetic media and a thermal element using a very small aperture laser to heat a portion of the media. The thermal spring magnetic media comprises [comprises] first and second stacks providing two exchange coupled ferromagnetic layers having different Curie temperatures [The first stack has a high magneto-crystalline anisotropy, a relatively low saturation magnetization and a low Curie temperature.] [The second stack has a relatively low magneto-crystalline anisotropy, a high saturation magnetization and a high Curie temperature.] The magnetic field gradient and the thermal gradient are arranged to substantially overlap at the trailing edge of the heated portion of the magnetic media allowing data at high density with high thermal stability to be recorded on the rapidly cooling thermal spring magnetic recording media.

    摘要翻译： 提供磁记录系统，其具有采用磁写场梯度和热梯度的组合的写头，以在“温度弹簧”磁记录介质上写入数据。 写头包括使用写入电流以在磁性介质上引起磁写入场的磁性元件，以及使用非常小的孔径激光器加热介质的一部分的热元件。 热弹簧磁介质包括[包括]第一和第二堆叠，提供具有不同居里温度的两个交换耦合铁磁层[第一堆叠具有高磁晶各向异性，相对低的饱和磁化强度和低居里温度]。[第二 堆叠具有相对较低的磁晶各向异性，高饱和磁化强度和高居里温度。]磁场梯度和热梯度被布置成在磁介质的加热部分的后缘处基本上重叠，允许高数据 具有高热稳定性的密度被记录在快速冷却的热弹簧磁记录介质上。

    Magnetic tunnel junction magnetoresistive read head with sensing layer as rear flux guide
    4.
    发明授权
    Magnetic tunnel junction magnetoresistive read head with sensing layer as rear flux guide 失效
    磁性隧道结磁阻读头，传感层作为后通量引导

    公开(公告)号：US5901018A

    公开(公告)日：1999-05-04

    申请号：US957788

    申请日：1997-10-24

    申请人： Robert Edward Fontana, Jr. ,  Stuart Stephen Papworth Parkin ,  Ching Hwa Tsang ,  Mason Lamar Williams

    发明人： Robert Edward Fontana, Jr. ,  Stuart Stephen Papworth Parkin ,  Ching Hwa Tsang ,  Mason Lamar Williams

    IPC分类号： G11B5/39 ,  G11B5/33

    CPC分类号： G11B5/33 ,  G11B5/332

    摘要： A magnetic tunnel junction (MTJ) magnetoresistive read head for a magnetic recording system has the MTJ sensing or free ferromagnetic layer also functioning as a flux guide to direct magnetic flux from the magnetic recording medium to the tunnel junction. The MTJ fixed ferromagnetic layer and the MTJ tunnel barrier layer have their front edges substantially coplanar with the sensing surface of the head. Both the fixed and free ferromagnetic layers are in contact with opposite surfaces of the MTJ tunnel barrier layer but the free ferromagnetic layer extends beyond the back edge of either the tunnel barrier layer or the fixed ferromagnetic layer, whichever back edge is closer to the sensing surface. This assures that the magnetic flux is non-zero in the tunnel junction region. The magnetization direction of the fixed ferromagnetic layer is fixed in a direction generally perpendicular to the sensing surface and thus to the magnetic recording medium, preferably by interfacial exchange coupling with an antiferromagnetic layer. The magnetization direction of the free ferromagnetic layer is aligned in a direction generally parallel to the surface of the medium in the absence of an applied magnetic field and is free to rotate in the presence of applied magnetic fields from the medium. A layer of high coercivity hard magnetic material adjacent the sides of the free ferromagnetic layer longitudinally biases the magnetization of the free ferromagnetic layer in the preferred direction.

    摘要翻译： 用于磁记录系统的磁隧道结（MTJ）磁阻读取头具有MTJ感测或自由铁磁层，还用作磁通指引，以将磁通量从磁记录介质引导到隧道结。 MTJ固定铁磁层和MTJ隧道阻挡层的前缘基本上与头部的感测表面共面。 固定和自由铁磁层都与MTJ隧道势垒层的相对表面接触，但自由铁磁层延伸超过隧道势垒层或固定铁磁层的后边缘，无论哪个后边缘更靠近感测表面 。 这确保了隧道结区域中的磁通量不为零。 固定铁磁层的磁化方向固定在大致垂直于感测表面的方向上，并因此固定在磁记录介质上，优选地通过与反铁磁层的界面交换耦合。 在没有施加的磁场的情况下，自由铁磁层的磁化方向在大致平行于介质的表面的方向上对齐，并且在存在来自介质的施加的磁场的情况下自由旋转。 邻近自由铁磁层侧面的高矫顽磁性硬磁材料层沿优选方向纵向偏置自由铁磁层的磁化。

    Wobble motor microactuator for fine positioning and disk drive incorporating the microactuator
    5.
    发明授权
    Wobble motor microactuator for fine positioning and disk drive incorporating the microactuator 失效
    摆动电机微型致动器用于精细定位和磁盘驱动器，并入微致动器

    公开(公告)号：US5805375A

    公开(公告)日：1998-09-08

    申请号：US703111

    申请日：1996-08-22

    申请人： Long-Sheng Fan ,  Robert Edward Fontana, Jr. ,  Tomotake Furuhata ,  Timothy Clark Reiley ,  Hans Helmut Zappe

    发明人： Long-Sheng Fan ,  Robert Edward Fontana, Jr. ,  Tomotake Furuhata ,  Timothy Clark Reiley ,  Hans Helmut Zappe

    IPC分类号： G11B5/55 ,  G11B5/596 ,  H02N1/00 ,  H02N1/100

    CPC分类号： G11B5/596 ,  G11B5/5521 ,  H02N1/004

    摘要： A microfabricated wobble motor with a positioning arm attached to the wobble motor rotor acts as a fine positioner with bidirectional movement. The primary application is a rotary actuator for the read/write head in a very small magnetic recording disk drive. An integrated head-arm assembly is attached at one end to the rotor of the wobble motor. The other end of the head-arm assembly has a head carrier that is maintained in contact with the disk. Head position error information is read from the disk and used to provide control signals to each of the stator elements. The stator elements are sequentially addressed by applying a voltage from a driver circuit. This causes the rotor to be electrostatically attracted to the activated stators, so that the rotor is movable bidirectionally. The read/write head can thus be moved bidirectionally to any of the data tracks on the disk and maintained on a desired data track for reading or writing data. The fine positioner also includes a digital control system where each of the stator elements is represented by an address, and the movement of the rotor is controlled by incrementing or decrementing the stator address in an address register.

    摘要翻译： 具有连接到摆动电动机转子的定位臂的微型摆动电动机作为具有双向运动的精细定位器。 主要应用是在非常小的磁记录磁盘驱动器中用于读/写磁头的旋转致动器。 一体的头臂组件一端连接到摆动马达的转子上。 头臂组件的另一端具有保持与盘接触的头托架。 磁头位置误差信息从磁盘读取并用于向每个定子元件提供控制信号。 通过施加来自驱动器电路的电压来顺序地寻址定子元件。 这导致转子被静电吸引到激活的定子，使得转子可双向移动。 因此，读/写头可以双向移动到磁盘上的任何数据轨道，并保持在用于读取或写入数据的所需数据轨道上。 精细定位器还包括数字控制系统，其中每个定子元件由地址表示，并且通过递增或递减地址寄存器中的定子地址来控制转子的移动。

    Magnetic head for recording with ultra low force
    6.
    发明授权
    Magnetic head for recording with ultra low force 失效
    用于超低力录音的磁头

    公开(公告)号：US5745979A

    公开(公告)日：1998-05-05

    申请号：US548767

    申请日：1995-10-26

    申请人： Robert Edward Fontana, Jr. ,  Linda Hope Lane ,  Mason Lamar Williams, III ,  Celia Elizabeth Yeack-Scranton

    发明人： Robert Edward Fontana, Jr. ,  Linda Hope Lane ,  Mason Lamar Williams, III ,  Celia Elizabeth Yeack-Scranton

    IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/48 ,  G11B5/49 ,  G11B21/21

    CPC分类号： G11B5/484 ,  G11B5/3103 ,  Y10T29/4903 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49046

    摘要： A disk drive assembly in which the suspension and read/write transducer are integrated into a combination assembly and fabricated using thin film deposition techniques thereby producing an assembly which is very low in mass permitting contact recording. In one embodiment, transducers are deposited in a row and column configuration onto a release and support layer covering a wafer substrate having a thickness equal to a desired suspension length. The wafer is separated into a plurality of row sections, with each row section providing one thin film transducer from each column. A second release layer is formed on a separated side on the row section and thin layers of suitable materials are deposited to form a suspension layer including conductive lines extending to the thin film transducers. The first and second release layers are dissolved and the row section is further cut to form the individual combination assemblies. In a second embodiment, the wafer substrate has a thickness equal to the width of the suspension. The transducers deposited on a row are separated by the desired suspension length to produce combination assemblies useful for linear disk drive actuators. The excess portion of the wafer substrate can alternatively be removed by cutting or etching eliminating the requirement for release or support layers.

    摘要翻译： 一种磁盘驱动器组件，其中悬架和读/写换能器集成到组合组件中并使用薄膜沉积技术制造，从而产生质量非常低的组件，允许接触记录。 在一个实施例中，换能器以行和列结构沉积到覆盖具有等于期望悬挂长度的厚度的晶片衬底的释放和支撑层上。 晶片被分成多个行部分，每个行部分从每个列提供一个薄膜换能器。 第二释放层形成在行部分上的分离侧上，并且沉积合适材料的薄层以形成包括延伸到薄膜换能器的导电线的悬浮层。 第一和第二释放层被溶解并且行部分被进一步切割以形成单独的组合组件。 在第二实施例中，晶片衬底的厚度等于悬架的宽度。 沉积在一排上的换能器被分离所需的悬挂长度，以产生用于线性盘驱动致动器的组合组件。 替代地，可以通过切割或蚀刻去除晶片衬底的多余部分，从而消除了释放或支撑层的要求。

    Flux guide read head with in stack biased current perpendicular to the planes (CPP) sensor
    7.
    发明授权
    Flux guide read head with in stack biased current perpendicular to the planes (CPP) sensor 失效
    磁通导向读头与堆叠偏置电流垂直于平面（CPP）传感器

    公开(公告)号：US06757144B2

    公开(公告)日：2004-06-29

    申请号：US10054530

    申请日：2002-01-18

    申请人： Kashmira J. Carey ,  Robert Edward Fontana, Jr. ,  Kuok San Ho ,  Tao Pan

    发明人： Kashmira J. Carey ,  Robert Edward Fontana, Jr. ,  Kuok San Ho ,  Tao Pan

    IPC分类号： G11B539

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

    摘要： Various embodiments of a read head employ a bias stack which is in a sensor stack of the read head. The bias stack includes a biasing layer and is separated from a free layer in the sensor by a spacer layer. A magnetic moment of the free layer is longitudinally biased antiparallel to a magnetic moment of the biasing layer because of the coupling therebetween. The free layer is therefore more uniformly longitudinally biased than when hard bias layers are employed at first and second side surfaces of the sensor. Various methods are described for making the various read heads of the present invention.

    摘要翻译： 读头的各种实施例使用位于读头的传感器堆叠中的偏置堆叠。 偏置堆叠包括偏置层，并且通过间隔层与传感器中的自由层分离。 由于它们之间的耦合，自由层的磁矩被纵向偏置反平行于偏置层的磁矩。 因此，与在传感器的第一和第二侧表面使用硬偏压层时相比，自由层的纵向偏移更均匀。 描述了用于制造本发明的各种读取头的各种方法。

    Flying height adjustment for air bearing sliders
    8.
    发明授权
    Flying height adjustment for air bearing sliders 失效
    空气轴承滑块的飞行高度调整

    公开(公告)号：US06344949B1

    公开(公告)日：2002-02-05

    申请号：US09352538

    申请日：1999-07-13

    申请人： Thomas Robert Albrecht ,  Robert Edward Fontana, Jr. ,  Prakash Kasiraj ,  Erno Hilbrand Klaassen ,  Robert Nolan Payne ,  Timothy Clark Reiley

    发明人： Thomas Robert Albrecht ,  Robert Edward Fontana, Jr. ,  Prakash Kasiraj ,  Erno Hilbrand Klaassen ,  Robert Nolan Payne ,  Timothy Clark Reiley

    IPC分类号： G11B1732

    CPC分类号： G11B5/486 ,  G11B5/4833 ,  G11B5/6064 ,  Y10S977/934

    摘要： Flying height Adjustment for Air Bearing Sliders An air bearing slider for sliding over a medium surface of a recording medium and having an air bearing surface facing the disk surface, a back surface perpendicular to the air bearing surface and a head at the back surface. During operation the head is maintained at a flying height above the disk surface with the aid of a flying height adjustment mechanism consisting of one or more ducts, each having an inlet at the air bearing surface and an outlet at the back surface. A valve mechanism controls an air flow through the duct or ducts by opening and closing the valve or valves together or independently. Alternatively, a deformable surface feature located on the back surface of the slider is used to alter the air flow to thus control the flying height. The mechanism of the invention allows one to achieve accurate flying height control in a range between 5 and 50 nm and between 0 nm and 15 nm as required for near-field or contact disk drives. By adjusting the flying height the contact can be limited to times of reading or writing data to the disk, thereby lowering the total contact time thereby reducing head/disk interface wear.

    摘要翻译： 空气轴承滑块的飞行高度调整用于在记录介质的介质表面上滑动并具有面向盘表面的空气轴承表面的空气轴承滑块，垂直于空气轴承表面的后表面和在后表面处的头部。 在操作期间，借助于由一个或多个管道组成的飞行高度调节机构，将头部保持在盘表面上方的飞行高度，每个管道在空气轴承表面具有入口和在后表面处的出口。 阀机构通过一起或独立地打开和关闭阀或阀来控制通过管道或管道的空气流。 或者，位于滑块后表面的可变形表面特征用于改变气流，从而控制飞行高度。 本发明的机构允许根据近场或接触盘驱动器的需要，在5至50nm之间和0nm至15nm的范围内实现精确的飞行高度控制。 通过调整飞行高度，可以将触点限制在读取或写入数据的次数，从而降低总接触时间，从而减少磁头/磁盘接口磨损。

    Magnetic head for recording with ultra low force
    9.
    发明授权
    Magnetic head for recording with ultra low force 失效
    用于超低力录音的磁头

    公开(公告)号：US06271995B1

    公开(公告)日：2001-08-07

    申请号：US08259370

    申请日：1994-06-14

    申请人： Robert Edward Fontana, Jr. ,  Linda Hope Lane ,  Mason Lamar Williams, III ,  Celia Elizabeth Yeack-Scranton

    发明人： Robert Edward Fontana, Jr. ,  Linda Hope Lane ,  Mason Lamar Williams, III ,  Celia Elizabeth Yeack-Scranton

    IPC分类号： G11B548

    CPC分类号： G11B5/484 ,  G11B5/3103 ,  Y10T29/4903 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49046

    摘要： A disk drive assembly in which the suspension and read/write transducer are integrated into a combination assembly and fabricated using thin film deposition techniques thereby producing an assembly which is very low in mass permitting contact recording. In one embodiment, transducers are deposited in a row and column configuration onto a release and support layer covering a wafer substrate having a thickness equal to a desired suspension length. The wafer is separated into a plurality of row sections, with each row section providing one thin film transducer from each column. A second release layer is formed on a separated side on the row section and thin layers of suitable materials are deposited to form a suspension layer including conductive lines extending to the thin film transducers. The first and second release layers are dissolved and the row section is further cut to form the individual combination assemblies. In a second embodiment, the wafer substrate has a thickness equal to the width of the suspension. The transducers deposited on a row are separated by the desired suspension length to produce combination assemblies useful for linear disk drive actuators. The excess portion of the wafer substrate can alternatively be removed by cutting or etching eliminating the requirement for release or support layers.

    摘要翻译： 一种磁盘驱动器组件，其中悬架和读/写换能器集成到组合组件中并使用薄膜沉积技术制造，从而产生质量非常低的组件，允许接触记录。 在一个实施例中，换能器以行和列结构沉积到覆盖具有等于期望悬挂长度的厚度的晶片衬底的释放和支撑层上。 晶片被分成多个行部分，每个行部分从每个列提供一个薄膜换能器。 第二释放层形成在行部分上的分离侧上，并且沉积合适材料的薄层以形成包括延伸到薄膜换能器的导电线的悬浮层。 第一和第二释放层被溶解并且行部分被进一步切割以形成单独的组合组件。 在第二实施例中，晶片衬底的厚度等于悬架的宽度。 沉积在一排上的换能器被分离所需的悬挂长度，以产生用于线性盘驱动致动器的组合组件。 替代地，可以通过切割或蚀刻去除晶片衬底的多余部分，从而消除了释放或支撑层的要求。