公开(公告)号：US06417998B1

公开(公告)日：2002-07-09

申请号：US09274187

申请日：1999-03-23

申请人： Billy W. Crue, Jr. ,  Zhupei Shi ,  Vijay K. Dhingra ,  Sean Yao

发明人： Billy W. Crue, Jr. ,  Zhupei Shi ,  Vijay K. Dhingra ,  Sean Yao

IPC分类号： G11B539

CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313

摘要： A magnetoresistive write element having a planar coil layer between a first pole and a second pole. The magnetoresistive write element further includes a buildup insulation layer having an upper surface that is substantially coplanar with an upper surface of the first pole. Further, the planar coil layer is disposed above both the first pole and the buildup insulation layer. A method for forming a magnetoresistive write element includes providing a first pole and covering the first pole with an insulating layer. The insulating layer is then planarized, thereby exposing the first pole and defining a buildup insulation layer. This planarization also results in the formation of a substantially planar upper surface of the buildup insulation layer and a substantially planar upper surface of the first pole. More specifically, the first pole upper surface is substantially coplanar with the buildup insulation layer upper surface. The method also includes forming a write gap material layer above the insulation layer and first pole, and forming a substantially planar coil layer above said write gap material layer. In addition, a second pole is formed above the write gap material layer, with the coil layer thereby disposed between the first pole and the second pole.

摘要翻译： 一种在第一极和第二极之间具有平面线圈层的磁阻写入元件。 磁阻写入元件还包括具有与第一极的上表面基本共面的上表面的积层绝缘层。 此外，平面线圈层设置在第一极和积层绝缘层两者之上。 形成磁阻写入元件的方法包括提供第一极并且用绝缘层覆盖第一极。 然后将绝缘层平坦化，从而暴露第一极并限定积层绝缘层。 这种平面化还导致形成积层绝缘层的基本平坦的上表面和第一极的基本平坦的上表面。 更具体地，第一极上表面与积层绝缘层上表面基本上共面。 该方法还包括在绝缘层和第一极之上形成写间隙材料层，以及在所述写间隙材料层之上形成基本平面的线圈层。 此外，在写入间隙材料层的上方形成第二极，由此将线圈层设置在第一极和第二极之间。

公开(公告)号：US06304414B1

公开(公告)日：2001-10-16

申请号：US09357580

申请日：1999-07-20

申请人： Billy W. Crue, Jr. ,  Renuka Apparao ,  Zhupei Shi ,  Sean Yao

发明人： Billy W. Crue, Jr. ,  Renuka Apparao ,  Zhupei Shi ,  Sean Yao

IPC分类号： G11B531

CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313

摘要： A magnetoresistive write element having a greatly reduced stack height allowing construction of a smaller track width and tighter track width tolerances. The reduced stack height also produces improved magnetic flux flow properties in the write element leading to an improved magnetic fringing field in the write gap region The magnetoresistive write head includes an electrically conductive planar coil having a portion thereof extending between first and second poles. The first and second poles join one another to form a magnetic yoke which is closed at one end and open at the other. An insulation layer separates the coil from the first pole. Another layer of insulating material is formed into the coil, interspersed between the winds and having an upper surface which is flush with the upper surface of the coil. A thin layer of write gap material insulates the coil from the second pole. Since there is only a thin layer of write gap material between the coil and the second pole, rather than a thicker insulation layer, the topography of the second pole can be reduced. This lowers the stack height which allows the second pole to be constructed to define a smaller write gap with tighter tolerances.

摘要翻译： 具有大大降低的堆叠高度的磁阻写入元件，允许构造更小的轨道宽度和更紧密的轨道宽度公差。 减小的堆叠高度还在写入元件中产生改善的磁通流动特性，导致写入间隙区域中改善的磁边界场磁阻写入头包括导电平面线圈，其具有在第一和第二极之间延伸的部分。 第一和第二极彼此结合形成磁轭，该磁轭在一端封闭并在另一端开放。 绝缘层将线圈与第一极分开。 绝缘材料的另一层形成为线圈，散布在风之间并且具有与线圈的上表面齐平的上表面。 写入间隙材料的薄层将线圈与第二极绝缘。 由于在线圈和第二极之间只有薄层的写间隙材料，而不是较厚的绝缘层，所以可以减小第二极的形貌。 这降低了堆叠高度，这允许构造第二极点以限定更小的公差的写入间隙。

公开(公告)号：US06944938B1

公开(公告)日：2005-09-20

申请号：US10976504

申请日：2004-10-29

申请人： Billy W. Crue, Jr. ,  Mark David Thomas ,  Zhupei Shi ,  Renuka Apparao

发明人： Billy W. Crue, Jr. ,  Mark David Thomas ,  Zhupei Shi ,  Renuka Apparao

IPC分类号： G11B5/127 ,  G11B5/39 ,  H04R31/00

CPC分类号： G11B5/39 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49071 ,  Y10T29/49073 ,  Y10T29/49798

摘要： A method of forming a head comprises forming a write transducer on a wafer, cutting the wafer to produce a slider bar with a cut surface, and planarizing the cut surface of the slider bar. Forming the write transducer can include forming a first pole layer and forming a first pole pedestal layer over the first pole layer, where the first pole pedestal layer includes a tapered portion defined by a first end having a nose width less than a desired final nose width, and a second end having a zero throat width greater than the desired final nose width. Planarizing the cut surface of the slider bar exposes the first pole pedestal layer until a width thereof approximately equals the desired final nose width.

摘要翻译： 形成头部的方法包括在晶片上形成写入传感器，切割晶片以产生具有切割表面的滑动条，并平滑化滑块的切割表面。 形成写传感器可以包括形成第一极层并在第一极层上形成第一极基座层，其中第一极基座层包括由第一端限定的锥形部分，第一端部的鼻部宽度小于期望的最终鼻部宽度 ，并且具有大于所需最终鼻宽度的零喉部宽度的第二端。 平滑化滑块的切割表面暴露第一极基座层，直到其宽度大致等于期望的最终鼻部宽度。

公开(公告)号：US07023658B1

公开(公告)日：2006-04-04

申请号：US09500380

申请日：2000-02-08

申请人： Kenneth E. Knapp ,  Ronald A. Barr ,  Zhupei Shi ,  Billy W. Crue, Jr.

发明人： Kenneth E. Knapp ,  Ronald A. Barr ,  Zhupei Shi ,  Billy W. Crue, Jr.

IPC分类号： G11B5/31 ,  G11B5/187 ,  G11B5/265 ,  G11B5/39

CPC分类号： G11B5/3116 ,  G11B5/313 ,  G11B5/3136 ,  G11B5/3163 ,  G11B5/3967

摘要： A trailing pole-tip for an electromagnetic transducer is formed as a layer oriented substantially perpendicular to other layers of the transducer, allowing the pole-tip to be made much thinner than conventional pole-tips. The novel pole-tip is formed on an edge or sidewall of a base layer instead of being formed on top of an existing layer. Potential errors in pole-tip thickness are much less than standard error tolerances for conventional pole-tip thickness. Having a greatly reduced pole-tip width significantly reduces the track width so that many more tracks can fit on a media surface, providing a large increase in areal density.

摘要翻译： 形成用于电磁换能器的拖尾极尖作为基本上垂直于换能器的其它层定向的层，允许极尖比常规杆尖薄得多。 新颖的极尖形成在基底层的边缘或侧壁上，而不是形成在现有层的顶部上。 极尖厚度的潜在误差远小于常规极尖厚度的标准误差公差。 具有极大降低的极尖宽度显着地减小了轨道宽度，使得更多的轨迹可以适合于介质表面，从而提供面密度的大幅增加。

公开(公告)号：US06496330B1

公开(公告)日：2002-12-17

申请号：US09393056

申请日：1999-09-09

申请人： Billy W. Crue, Jr. ,  Zhupei Shi ,  Mark David Thomas ,  Lien-Chang Wang

发明人： Billy W. Crue, Jr. ,  Zhupei Shi ,  Mark David Thomas ,  Lien-Chang Wang

IPC分类号： G11B517

CPC分类号： G11B5/313 ,  G11B2005/0013 ,  Y10T29/49062

摘要： A magnetoresistive head having a split coil structure including multiple, similar coil layers separated by an insulator and joined at their ends to define parallel electrical paths. The coil passes through a magnetic yoke having an open end and a closed end and is electrically insulated from the yoke. The parallel electrical paths of the separate coil layers can each be modeled as a resistor in series with an inductor, each of the paths also being in parallel with a capacitor. The split coil has a much faster current rise time than a comparable single layer coil or than multiple coils connected in series. Since the coil current provides the magneto-motive force for imparting a signal on a passing recording medium, the decreased current rise time corresponds to an increased data recording rate.

摘要翻译： 一种具有分离线圈结构的磁阻头，包括由绝缘体隔开并在其端部连接以限定平行电路径的多个相似的线圈层。 线圈通过具有开口端和封闭端的磁轭，并且与磁轭电绝缘。 单独线圈层的并联电路可以各自被建模为与电感器串联的电阻器，每个路径也与电容器并联。 分离线圈的电流上升时间比可比较的单层线圈要快得多，或多个线圈串联连接。 由于线圈电流提供用于在通过的记录介质上施加信号的磁动力，所以减小的电流上升时间对应于增加的数据记录速率。

公开(公告)号：US06466404B1

公开(公告)日：2002-10-15

申请号：US09994436

申请日：2001-11-26

申请人： Billy W. Crue, Jr. ,  Renuka Apparao ,  Zhupei Shi ,  Ken Young ,  Mark Seymour

发明人： Billy W. Crue, Jr. ,  Renuka Apparao ,  Zhupei Shi ,  Ken Young ,  Mark Seymour

IPC分类号： G11B5147

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/3123 ,  G11B5/313 ,  G11B5/3967 ,  G11B2005/3996

摘要： A write element for recording data on a magnetic medium includes a first pole and a second pole separated by a non-magnetic, electrically insulating write gap layer. In addition, a coil layer is recessed into the first pole and is electrically insulated from the first pole by a coil insulation layer, and form the second pole by a coil separation layer. The coil layer includes at least one coil turn, each of which are transversely separated from an adjacent coil turn by a coil turn divider. In some embodiments, the coil turn dividers are integral with and therefore formed of the same material as the first pole. The coil layer, first pole, and coil turn dividers are planarized before formation of the coil separation layer. Also, a second pole pedestal can be connected to the second pole at the air bearing surface, and separated from the first pole by the write gap layer. A highly heat conductive material can be disposed below the first pole as an undercoat. Such an undercoat can facilitate dispersion of heat that is generated by a current passing through the coil layer, away from other components of the write element. In addition, the write element can be formed in conjunction with a read element to form a read/write head. The read element can be formed above the write element, with the coil layer embedded in the first pole which is distal the read element.

公开(公告)号：US06483662B1

公开(公告)日：2002-11-19

申请号：US09350773

申请日：1999-07-09

申请人： Mark Thomas ,  Billy W. Crue, Jr. ,  Zhupei Shi ,  Sonny Tran

发明人： Mark Thomas ,  Billy W. Crue, Jr. ,  Zhupei Shi ,  Sonny Tran

IPC分类号： G11B5147

CPC分类号： G11B5/313 ,  G11B5/3116 ,  G11B5/3967

摘要： A magnetoresistive write element has a plurality of coils disposed between a first and second pole. A first coil having inner and outer contacts is provided on top of a layer of insulation on top of the first pole. A write gap material above the first coil separates the poles at a yoke tip region to form a write gap therebetween. Second and third coils wound in the form of a single bifilar coil are provided on top of the write gap material, each having an inner and an outer contact portion. Electrical connection between the inner contact of the first coil and the inner contact of the second coil is provided through a via in the write gap material. An insulation layer above the second and third coils provides separation from a fourth coil provided thereabove. The fourth coil also has inner and outer contact portions. The outer contact of the fourth coil electrically connects with the outer contact of the second coil through one of the vias in the second insulation layer separating the second and third coil from the fourth coil. Similarly, the inner contact of the fourth coil connects electrically with the inner contact of the third coil. An insulation layer is deposited on top of the fourth coil and the second pole is formed on top thereof such that the first and second poles make electrical connection with one another at back gap portion.

摘要翻译： 磁阻写入元件具有设置在第一和第二极之间的多个线圈。 具有内触点和外触点的第一线圈设置在第一极顶上的绝缘层的顶部。 在第一线圈上方的写入间隙材料将磁极尖端区域处的磁极分开，以在它们之间形成写入间隙。 卷绕在单个双线圈形式的第二和第三线圈设置在写入间隙材料的顶部，每个具有内部和外部接触部分。 通过写入间隙材料中的通孔提供第一线圈的内部接触和第二线圈的内部接触之间的电连接。 第二和第三线圈上方的绝缘层提供与设置在其上的第四线圈的分离。 第四线圈还具有内部和外部接触部分。 第四线圈的外触点通过第二绝缘层中的一个通孔与第二线圈的外触点电连接，以使第二和第三线圈与第四线圈分离。 类似地，第四线圈的内部接触件与第三线圈的内部接触件电连接。 绝缘层沉积在第四线圈的顶部上，并且第二极形成在其顶部上，使得第一和第二极在后间隙部分处彼此电连接。

公开(公告)号：US06400526B2

公开(公告)日：2002-06-04

申请号：US09320168

申请日：1999-05-26

申请人： Billy W. Crue, Jr. ,  Zhupei Shi ,  Carlos Corona ,  Mark D. Thomas

发明人： Billy W. Crue, Jr. ,  Zhupei Shi ,  Carlos Corona ,  Mark D. Thomas

IPC分类号： G11B5147

CPC分类号： G11B5/4853 ,  G11B5/00 ,  G11B5/012 ,  G11B5/313 ,  G11B2005/0005

摘要： A write element for recording data on a magnetic medium is provided having an impedance designed to substantially match the impedance of an electrical interconnection between it and a pre-amp chip located nearby on the load beam. Additional embodiments are directed to incorporating a read element with the write element to form a read/write head, and to further incorporate the read/write head into a magnetic disk drive. Further embodiments are directed towards the fabrication of the write element.

摘要翻译： 提供了一种用于在磁介质上记录数据的写元件，其具有被设计为基本上匹配其与位于负载光束附近的前置放大器芯片之间的电互连的阻抗的阻抗。 另外的实施例旨在将读取元件与写入元件结合以形成读/写头，并且将读/写头进一步并入到磁盘驱动器中。 另外的实施例涉及写入元件的制造。

公开(公告)号：US06829819B1

公开(公告)日：2004-12-14

申请号：US10013431

申请日：2001-12-11

申请人： Billy W. Crue, Jr. ,  Mark David Thomas ,  Zhupei Shi ,  Renuka Apparao

发明人： Billy W. Crue, Jr. ,  Mark David Thomas ,  Zhupei Shi ,  Renuka Apparao

IPC分类号： G11B5127

CPC分类号： G11B5/3912 ,  G11B5/09 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3146 ,  G11B5/3163 ,  G11B5/3967 ,  Y10T29/49039 ,  Y10T29/49041 ,  Y10T29/49048 ,  Y10T29/4905 ,  Y10T29/49071 ,  Y10T29/49073

摘要： A magnetoresistive device having a first pole, a second pole, and a first tapered pole pedestal therebetween and magnetically connected to the second pole. The first tapered pole has a width that increases with increasing distance away from the air bearing surface, ABS. The magnetoresistive device can also include a second tapered pole pedestal magnetically connected to the first pole, and separated from the first tapered pole pedestal by a write gap. The second tapered pole pedestal has a width that increases with increasing distance away from the air bearing surface. A method of the present invention includes defining the trackwidth of a write element by lapping a tapered pole pedestal. More specifically, the trackwidth is given by a known taper angle, a zero throat width, and a throat height, wherein the throat height is controlled precisely by lapping.

摘要翻译： 一种具有第一极，第二极和它们之间的第一锥形极基座并与第二极磁性连接的磁阻器件。 第一锥形杆的宽度随着远离空气轴承表面ABS的距离而增加。 磁阻器件还可以包括磁性连接到第一极的第二锥形极基座，并且通过写入间隙与第一锥形极基座分离。 第二锥形极基座的宽度随着距离空气轴承表面的距离的增加而增加。 本发明的方法包括通过研磨锥形极基座来定义写入元件的轨道宽度。 更具体地，轨道宽度由已知的锥角，零喉部宽度和喉部高度给出，其中喉部高度通过研磨精确地控制。

公开(公告)号：US06396660B1

公开(公告)日：2002-05-28

申请号：US09379892

申请日：1999-08-23

申请人： William Jensen ,  Mark David Thomas ,  Zhupei Shi ,  Billy W. Crue, Jr.

发明人： William Jensen ,  Mark David Thomas ,  Zhupei Shi ,  Billy W. Crue, Jr.

IPC分类号： G11B531

CPC分类号： G11B5/3133 ,  G11B5/012 ,  G11B5/313 ,  G11B5/40 ,  G11B33/14

摘要： A magnetic read/write head having improved thermal characteristics. The read/write head includes a read element and a write element formed there over. The read element includes a read sensor embedded within a dielectric material and sandwiched between first and second shields. The write element includes first and second poles joined to form a yoke. The yoke is closed at one end and defines a write gap at the other. A coil having windings which extend through the yoke generates a magnetic flux within the yoke. This magnetic flux causes a magnetic fringe field at the location of the write gap, the fringe field being capable of imparting a magnetic signal onto a passing magnetic medium. The coil sits atop a thermally conductive, electrically insulating material which electrically isolates the coil from surrounding structure. When a current flows through the coil, heat will be generated. Such heat, which could be detrimental to read performance, is conducted through the thermally conductive material out of the yoke and away from the write element. The thermally conductive material provides a large heat sink for dissipation of the heat.

摘要翻译： 具有改善的热特性的磁读/写头。 读/写头包括读取元件和在其上形成的写入元件。 读取元件包括嵌入电介质材料内并夹在第一和第二屏蔽之间的读取传感器。 写入元件包括连接以形成轭的第一和第二极。 磁轭在一端封闭，并在另一端限定写入间隙。 具有延伸穿过轭的绕组的线圈在轭内产生磁通。 该磁通量在写入间隙的位置处产生磁性边缘场，边缘场能够将磁信号传递到通过的磁性介质上。 线圈位于导热电绝缘材料的顶部，将线圈与周围结构电隔离。 当电流流过线圈时，会产生热量。 可能对读取性能有害的这种热量通过导热材料从磁轭外部并且远离写入元件进行。 导热材料提供了一个大的散热片来散热。