公开(公告)号：US5768070A

公开(公告)日：1998-06-16

申请号：US856532

申请日：1997-05-14

Applicant: Mohamad Towfik Krounbi ,  Mark E. Re

Inventor： Mohamad Towfik Krounbi ,  Mark E. Re

IPC: G11B5/012 ,  G11B5/127 ,  G11B5/17 ,  G11B5/265 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39 ,  G11B5/48 ,  G11B19/04

CPC classification number: G11B5/3954 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/4886 ,  G11B19/04 ,  G11B5/2652 ,  G11B5/3113 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

Abstract: A horizontal combined head is provided which has both a thin film write and an MR read element located at an air bearing surface (ABS). The read element can be formed with a track width that is independent of the track width of the write element. The MR sensor or the read element is separated from one of the first and second pole pieces of the write element by an insulation layer. Accordingly, the shields for the read element remain more stable after a write operation. In one embodiment of the present invention a single stripe MR sensor is employed while in a second embodiment a dual stripe MR sensor is employed. A method of the invention includes forming the dual MR stripe in a single process step so that the dual MR stripes of the dual MR sensor are near identical for implementing near absolute common mode rejection of noise.

Abstract translation: 提供了水平组合头，其具有位于空气轴承表面（ABS）处的薄膜写入和MR读取元件。 读取元件可以形成为与写入元件的轨迹宽度无关的轨道宽度。 MR传感器或读取元件通过绝缘层与写入元件的第一和第二极片中的一个分离。 因此，读写元件的屏蔽在写操作之后保持更稳定。 在本发明的一个实施例中，采用单条MR传感器，而在第二实施例中采用双条MR传感器。 本发明的方法包括在单个工艺步骤中形成双MR条纹，使得双MR传感器的双MR条带几乎相同以实现噪声的近绝对共模抑制。

公开(公告)号：US06722019B1

公开(公告)日：2004-04-20

申请号：US09044268

申请日：1998-03-19

Applicant: Mohamad Towfik Krounbi ,  Mark E. Re

Inventor： Mohamad Towfik Krounbi ,  Mark E. Re

IPC: G11B542

CPC classification number: G11B5/3954 ,  G11B5/2652 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/4886 ,  G11B19/04 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

Abstract: A horizontal combined head is provided which has both a thin film write and an MR read element located at an air bearing surface (ABS). The read element can be formed with a track width that is independent of the track width of the write element. The MR sensor or the read element is separated from one of the first and second pole pieces of the write element by an insulation layer. Accordingly, the shields for the read element remain more stable after a write operation. In one embodiment of the present invention a single stripe MR sensor is employed while in a second embodiment a dual stripe MR sensor is employed. A method of the invention includes forming the dual MR stripe in a single process step so that the dual MR stripes of the dual MR sensor are near identical for implementing near absolute common mode rejection of noise.

Abstract translation: 提供了水平组合头，其具有位于空气轴承表面（ABS）处的薄膜写入和MR读取元件。 读取元件可以形成为与写入元件的轨迹宽度无关的轨道宽度。 MR传感器或读取元件通过绝缘层与写入元件的第一和第二极片中的一个分离。 因此，读写元件的屏蔽在写操作之后保持更稳定。 在本发明的一个实施例中，采用单条MR传感器，而在第二实施例中采用双条MR传感器。 本发明的方法包括在单个工艺步骤中形成双MR条纹，使得双MR传感器的双MR条带几乎相同以实现噪声的近绝对共模抑制。

公开(公告)号：US5527110A

公开(公告)日：1996-06-18

申请号：US56164

申请日：1993-04-30

Applicant: David W. Abraham ,  Anthony P. Praino ,  Mark E. Re ,  Hemantha K. Wickramasinghe

Inventor： David W. Abraham ,  Anthony P. Praino ,  Mark E. Re ,  Hemantha K. Wickramasinghe

IPC: G01N25/72 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/596 ,  G11B5/60 ,  G11B5/82 ,  G11B11/00 ,  G11B11/06 ,  G11B13/00 ,  G11B17/32 ,  G11B19/04 ,  G11B20/10 ,  G11B20/24 ,  G11B33/10 ,  G01N25/70

CPC classification number: G11B20/10009 ,  G01N25/72 ,  G11B11/00 ,  G11B13/00 ,  G11B17/32 ,  G11B20/24 ,  G11B33/10 ,  G11B5/00 ,  G11B5/012 ,  G11B5/59683 ,  G11B5/607 ,  G11B11/06 ,  G11B19/04 ,  G11B2005/0021 ,  G11B5/02 ,  G11B5/59633 ,  G11B5/6005 ,  G11B5/82

Abstract: A method and apparatus for mapping the character and location of small surface variations on a planar surface. Energy is supplied to an object in close proximity to the planar surface to thereby raise the temperature of the object. The object is moved with respect to the planer surface substantially constant. A decrease in temperature of the object is detected when it is in proximity to the variation to define the location and character of the variation. The energy supply may be thermal energy or optical energy but preferably is electrical energy which heats a resistive element. Preferably, the object is the magnetoresistive head of a disk drive assembly. The surface may be that of a magnetic recording material. The change in temperature is detected by monitoring the resistance of the magnetoresistive coil of the head. The energy may be supplied in pulses to obtain higher peek temperatures while avoiding mechanical distortion of the object. It is preferred that the object be positioned with respect to the surface so that when that relative motion between the surface and the object occurs, the object does not contact the surface.

Abstract translation: 一种在平坦表面上映射小表面变化的字符和位置的方法和装置。 能量被提供给靠近平面的物体，从而提高物体的温度。 物体相对于平面移动大致恒定。 当物体接近变化以检测变化的位置和特征时，检测物体的温度的降低。 能量供应可以是热能或光能，但优选是加热电阻元件的电能。 优选地，该目的是磁盘驱动器组件的磁阻磁头。 表面可以是磁记录材料的表面。 通过监测磁头的磁阻线圈的电阻来检测温度变化。 可以以脉冲提供能量以获得更高的窥视温度，同时避免物体的机械变形。 优选地，物体相对于表面定位，使得当表面和物体之间的相对运动发生时，物体不接触表面。

公开(公告)号：US06925702B2

公开(公告)日：2005-08-09

申请号：US10688726

申请日：2003-10-17

Applicant: Mohamad Towfik Krounbi ,  Mark E. Re

Inventor： Mohamad Towfik Krounbi ,  Mark E. Re

IPC: G11B5/012 ,  G11B5/127 ,  G11B5/17 ,  G11B5/265 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39 ,  G11B5/48 ,  G11B19/04 ,  G11B5/42

CPC classification number: G11B5/3954 ,  G11B5/2652 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/4886 ,  G11B19/04 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

Abstract: A horizontal combined head is provided which has both a thin film write and an MR read element located at an air bearing surface (ABS). The read element can be formed with a track width that is independent of the track width of the write element. The MR sensor or the read element is separated from one of the first and second pole pieces of the write element by an insulation layer. Accordingly, the shields for the read element remain more stable after a write operation. In one embodiment of the present invention a single stripe MR sensor is employed while in a second embodiment a dual stripe MR sensor is employed. A method of the invention includes forming the dual MR stripe in a single process step so that the dual MR stripes of the dual MR sensor are near identical for implementing near absolute common mode rejection of noise.

Abstract translation: 提供了水平组合头，其具有位于空气轴承表面（ABS）处的薄膜写入和MR读取元件。 读取元件可以形成为与写入元件的轨迹宽度无关的轨道宽度。 MR传感器或读取元件通过绝缘层与写入元件的第一和第二极片中的一个分离。 因此，读写元件的屏蔽在写操作之后保持更稳定。 在本发明的一个实施例中，采用单条MR传感器，而在第二实施例中采用双条MR传感器。 本发明的方法包括在单个工艺步骤中形成双MR条纹，使得双MR传感器的双MR条带几乎相同以实现噪声的近绝对共模抑制。

公开(公告)号：US5537273A

公开(公告)日：1996-07-16

申请号：US379125

申请日：1995-01-27

Applicant: Ferdinand Hendriks ,  Mark E. Re

Inventor： Ferdinand Hendriks ,  Mark E. Re

IPC: G11B5/58 ,  G11B5/60 ,  G11B21/20 ,  G11B21/21 ,  G11B17/32

CPC classification number: G11B5/6005 ,  G11B21/20 ,  G11B21/21 ,  G11B5/58

Abstract: An air bearing slider incorporating the invention has both front and rear pads extending from a generally planar body. Both pads have bearing faces separated by a gap that is substantially in excess of any fly height of the slider. The sides of both pads are oriented at a rake angle that is approximately equal to the maximum expected skew angle. The separation of the pads enables the slider to exhibit good pitch stability, and the pad rake angles provide resistance to roll effects that occur at large skew angles. Both pad faces exhibit extremely small taper angles that enable "inlet throttling" of air entrained by the slider. Such inlet throttling provides the slider with a fly height that is substantially independent of relative speed changes between the slider and a recording medium. A further embodiment includes a rear slider for contact recording applications.

Abstract translation: 结合本发明的空气轴承滑块具有从大体上平坦的主体延伸的前垫和后垫。 两个垫片具有由基本上超过滑块的任何飞行高度的间隙分开的轴承面。 两个焊盘的侧面定向成大致等于最大预期倾斜角的前角。 垫的分离使得滑块能够表现出良好的桨距稳定性，并且垫前角提供对大倾斜角发生的滚动效应的抵抗。 两个焊盘表面都呈现出非常小的锥角，使得滑块夹带的空气能够“进入节流”。 这种入口节流为滑块提供了飞行高度，其基本上与滑块和记录介质之间的相对速度变化无关。 另一实施例包括用于接触记录应用的后滑块。

公开(公告)号：US4825318A

公开(公告)日：1989-04-25

申请号：US058827

申请日：1987-06-05

Applicant: Stanley S. K. Hoo ,  Mark E. Re

Inventor： Stanley S. K. Hoo ,  Mark E. Re

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/58 ,  G11B5/596 ,  G11B5/27 ,  G11B5/18

CPC classification number: G11B5/31 ,  G11B5/1278 ,  G11B5/58 ,  G11B5/596

Abstract: An inductive vertical or horizontal read/write head element for use in rigid magnetic disk files. The element is comprised of at least three spaced apart poles, each of said poles having a flux path extending from said head means, magnetically connecting said path, and at least two electrical coils positioned about said flux paths for inducing a flux in said flux paths. The element also has tracking capabilities when the first and last poles are offset from the other poles, which are essentially aligned.

Abstract translation: 用于刚性磁盘文件的感应式垂直或水平读/写头元件。 所述元件由至少三个间隔开的极组成，每个所述极具有从所述头部装置延伸的磁通路径，磁性地连接所述路径，以及围绕所述磁通路径定位的至少两个电线圈，用于在所述磁通路径 。 当第一和最后的极点与基本对齐的其他极点偏移时，元件也具有跟踪能力。

公开(公告)号：US07213326B2

公开(公告)日：2007-05-08

申请号：US11172735

申请日：2005-07-01

Applicant: Mohamad Towfik Krounbi ,  Mark E. Re

Inventor： Mohamad Towfik Krounbi ,  Mark E. Re

IPC: G11B5/42

CPC classification number: G11B5/3954 ,  G11B5/2652 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/4886 ,  G11B19/04 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

Abstract: A horizontal combined head is provided which has both a thin film write and an MR read element located at an air bearing surface (ABS). The read element can be formed with a track width that is independent of the track width of the write element. The MR sensor or the read element is separated from one of the first and second pole pieces of the write element by an insulation layer. Accordingly, the shields for the read element remain more stable after a write operation. In one embodiment of the present invention a single stripe MR sensor is employed while in a second embodiment a dual stripe MR sensor is employed. A method of the invention includes forming the dual MR stripe in a single process step so that the dual MR stripes of the dual MR sensor are near identical for implementing near absolute common mode rejection of noise.

Abstract translation: 提供了水平组合头，其具有位于空气轴承表面（ABS）处的薄膜写入和MR读取元件。 读取元件可以形成为与写入元件的轨迹宽度无关的轨道宽度。 MR传感器或读取元件通过绝缘层与写入元件的第一和第二极片中的一个分离。 因此，读写元件的屏蔽在写操作之后保持更稳定。 在本发明的一个实施例中，采用单条MR传感器，而在第二实施例中采用双条MR传感器。 本发明的方法包括在单个工艺步骤中形成双MR条纹，使得双MR传感器的双MR条带几乎相同以实现噪声的近绝对共模抑制。

公开(公告)号：US07100268B2

公开(公告)日：2006-09-05

申请号：US11172734

申请日：2005-07-01

Applicant: Mohamad Towfik Krounbi ,  Mark E. Re

Inventor： Mohamad Towfik Krounbi ,  Mark E. Re

IPC: G11B5/42 ,  H04R31/00

CPC classification number: G11B5/3954 ,  G11B5/2652 ,  G11B5/3113 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967 ,  G11B5/4886 ,  G11B19/04 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/4906

Abstract: A method of making a magnetic head includes imbedding a coil layer in an insulation stack. The coil layer is formed with a filament that extends about a central axis. The central axis is perpendicular to a planar head surface and a coil plane. First and second pole pieces are formed with the insulation stack sandwiched between the first and second pole pieces. A first shield layer having first and second major planar thin film surfaces is joined by a third edge with the first major planar thin film surface of the first shield layer forming a portion of the planar head surface. A magnetoresistive (MR) sensor and first and second gap layers are formed with the MR sensor sandwiched between the first and second gap layers and the first and second gap layers located between the third edge and the first horizontal component and with the MR sensor and the first and second gap layers forming portions of the planar head surface.

Abstract translation: 制造磁头的方法包括将线圈层嵌入绝缘堆叠中。 线圈层形成有围绕中心轴线延伸的细丝。 中心轴垂直于平面头表面和线圈平面。 第一和第二极片形成有夹在第一和第二极靴之间的绝缘堆叠。 具有第一和第二主平面薄膜表面的第一屏蔽层通过第三边缘连接，第一屏蔽层的第一主平面薄膜表面形成平面头表面的一部分。 形成磁阻（MR）传感器和第一和第二间隙层，其中MR传感器夹在第一和第二间隙层之间，第一和第二间隙层位于第三边缘和第一水平部件之间，并且与MR传感器和 第一和第二间隙层形成平面头表面的部分。

公开(公告)号：US5392169A

公开(公告)日：1995-02-21

申请号：US73187

申请日：1993-06-08

Applicant: Bernell E. Argyle ,  Anthony P. Praino ,  Mark E. Re ,  Rudolf Schafer ,  Shinji Takayama ,  Philip L. Trouilloud

Inventor： Bernell E. Argyle ,  Anthony P. Praino ,  Mark E. Re ,  Rudolf Schafer ,  Shinji Takayama ,  Philip L. Trouilloud

IPC: G11B5/00 ,  G11B5/09 ,  G11B5/187 ,  G11B5/31 ,  G11B5/455 ,  G11B5/465 ,  G11B19/04 ,  G11C19/08 ,  H01F13/00 ,  H01H47/00

CPC classification number: G11B19/04 ,  G11B5/09 ,  G11B5/1878 ,  G11B5/3113 ,  G11B5/455 ,  G11B5/465 ,  G11B2005/0008

Abstract: A method and apparatus for conditioning a magnetic read/write head to substantially eliminate read-back pulse distortions associated with unfavorable magnetic domain patterns in the head stores the polarity of the last write current pulse of a write pulse train applied to the head-coils. This polarity is compared to a pre-determined reset current pulse polarity. If the last write current polarity is opposite to the reset current polarity, then a reset pulse, or a series of pulses, having the pre-determined reset polarity is applied to the head prior to performing a read operation with the head. The pre-determined reset polarity corresponds to the polarity that resets the head to the magnetic domain state most preferred for reading due to reduction of read-back distortion. The reset pulse, or pulse train, according to the present invention is of constant polarity. If the last write current pulse polarity is the same as the reset polarity, then no reset pulse is applied to the head. Prior to applying the reset pulse, the head is either re-positioned or, if not re-positioned, the reset pulse is applied to the head only when it is flying over a sector gap.

Abstract translation: 用于调节磁读/写头以基本上消除与头部中不利的磁畴图案相关联的回读脉冲失真的方法和装置存储施加到磁头线圈的写入脉冲序列的最后写入电流脉冲的极性。 该极性与预定的复位电流脉冲极性进行比较。 如果最后的写入电流极性与复位电流极性相反，则在执行与磁头的读取操作之前，将具有预定复位极性的复位脉冲或一系列脉冲施加到磁头。 预定的复位极性对应于由于回读失真的减少将磁头重置为最优选用于读取的磁畴状态的极性。 根据本发明的复位脉冲或脉冲串具有恒定的极性。 如果最后一个写入电流脉冲极性与复位极性相同，则不会对磁头施加复位脉冲。 在应用复位脉冲之前，头部被重新定位，或者如果不是重新定位，则仅当其在扇形间隙上飞行时才将复位脉冲施加到头部。

公开(公告)号：US5142426A

公开(公告)日：1992-08-25

申请号：US542288

申请日：1990-06-21

Applicant: Mark E. Re ,  Michael A. Russak ,  Bucknell C. Webb

Inventor： Mark E. Re ,  Michael A. Russak ,  Bucknell C. Webb

IPC: G11B5/33 ,  G11B5/31

CPC classification number: G11B5/3143

Abstract: A thin film magnetic head, having a predetermined cut-off frequency is constructed of alternating first and second layers, the first layers include a magnetic material and the second layers include a resistive material. The resistivity of the second layers is chosen so that the head's cut-off frequency exceeds the head's required frequency response. The resistivity of the second layers is chosen to be considerably less than any level of resistivity which falls within the insulation regime.