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    Wafer level test structure for detecting multiple domains and magnetic instability in a permanent magnet stabilized MR head
    1.
    发明授权
    Wafer level test structure for detecting multiple domains and magnetic instability in a permanent magnet stabilized MR head 失效
    用于检测永磁体稳定MR磁头中的多个磁畴和磁性不稳定性的晶圆级测试结构

    公开(公告)号：US5514953A

    公开(公告)日：1996-05-07

    申请号：US437692

    申请日：1995-05-09

    申请人： Allan E. Schultz ,  Peter K. George ,  William P. Wood ,  Duane C. Phinney ,  Patrick J. Ryan

    发明人： Allan E. Schultz ,  Peter K. George ,  William P. Wood ,  Duane C. Phinney ,  Patrick J. Ryan

    IPC分类号： G01N27/82 ,  G01R33/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/455 ,  G01R33/12 ,  H01L43/08

    CPC分类号： G11B5/397 ,  G01N27/82 ,  G01R33/09 ,  G01R33/096 ,  G11B5/455 ,  G11B5/3166 ,  G11B5/3189 ,  Y10T29/49004

    摘要： A wafer level test structure and method detects multiple magnetic domains and magnetic domain instability in a test magnetic element. The apparatus comprises a first MR sensor designed to be held in a single magnetic domain by shape anisotropy and a second MR sensor having a permanent magnet to hold the element in a single magnetic domain. A circuit connects the first and second MR sensors to detect differences between the changes in resistance between the first and second sensors in the presence of a magnetic field or differences in resistance after the application and release of a magnetic field. The circuit is preferably a balance circuit in which imbalance in the presence of a magnetic field indicates the presence of multiple magnetic domains in at least one of the test sensors. Magnetic domain stability may be tested by applying an external field to disrupt the existing single domain state of the test sensors, and thereafter detecting differences in resistance of the sensors during reversal of the magnetic field.

    摘要翻译： 晶圆级测试结构和方法检测测试磁性元件中的多个磁畴和磁畴不稳定性。 该装置包括被设计为通过形状各向异性保持在单个磁畴中的第一MR传感器和具有永磁体以将元件保持在单个磁畴中的第二MR传感器。 电路连接第一和第二MR传感器，以在存在磁场或施加和释放磁场之后的电阻差时检测第一和第二传感器之间的电阻变化之间的差异。 该电路优选地是其中存在磁场的不平衡指示在至少一个测试传感器中存在多个磁畴的平衡电路。 可以通过施加外部场来破坏测试传感器的现有单域状态，然后在磁场反转期间检测传感器的电阻差异来测试磁畴稳定性。

    Narrow track inductive write head having a two-piece pole
    3.
    发明授权
    Narrow track inductive write head having a two-piece pole 有权
    窄轨感应写头，具有两片极

    公开(公告)号：US06301076B1

    公开(公告)日：2001-10-09

    申请号：US09246448

    申请日：1999-02-09

    申请人： Frank E. Stageberg ,  Kenneth P. Ash ,  James K. Price ,  Feng Wang ,  Elzbieta J. Haftek ,  Allan E. Schultz ,  Richard P. Larson

    发明人： Frank E. Stageberg ,  Kenneth P. Ash ,  James K. Price ,  Feng Wang ,  Elzbieta J. Haftek ,  Allan E. Schultz ,  Richard P. Larson

    IPC分类号： G11B5147

    CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3153 ,  G11B5/3163 ,  Y10T29/49025 ,  Y10T29/49032 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49044

    摘要： A two-piece pole for an inductive write head has a first pole piece in the tip region contiguous the gap and confronting the other pole across the gap. The first pole piece has a width defining the gap width of the write head at the air bearing surface. A second pole piece is connected to the first pole piece and extends to the back gap. At least a portion of the second pole piece is connected to the first pole piece and has a width larger than the width of the first pole piece. The second pole piece means has surfaces within the pole tip region that intersect at external corners facing the gap, at least two surfaces of each of these external corners being joined at an obtuse angle so that none of said external corner is a sharp external corner, thereby minimizing fringe fields. In one form, a pole cap between the first and second pole pieces has a trapezoidal configuration forming the obtuse angles.

    摘要翻译： 用于感应式写入头的两片式极头具有尖端区域中的与间隙连接的第一极片，并且将另一极对面跨越间隙。 第一极片具有限定写入头在空气支承表面处的间隙宽度的宽度。 第二极靴连接到第一极靴并延伸到后隙。 第二极靴的至少一部分连接到第一极靴，其宽度大于第一极靴的宽度。 第二极靴装置具有在极尖区域内的面向间隙的外角处的表面，这些外角中的每一个的至少两个表面以钝角连接，使得所述外角部都不是尖锐的外角， 从而最小化边缘场。 在一种形式中，第一和第二极片之间的极帽具有形成钝角的梯形构造。

    Amorphous diamond-like carbon gaps in magnetoresistive heads
    5.
    发明授权
    Amorphous diamond-like carbon gaps in magnetoresistive heads 失效
    磁阻磁头中的无定形菱形碳隙

    公开(公告)号：US5644455A

    公开(公告)日：1997-07-01

    申请号：US211759

    申请日：1994-04-15

    申请人： Allan E. Schultz

    发明人： Allan E. Schultz

    IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3906 ,  G11B5/3106 ,  G11B5/313 ,  G11B5/3903 ,  G11B5/3967

    摘要： An assembly comprises a magnetoresistive element (16), a thermally conductive member or magnetic film (18, 26), and a film of thermally conductive, high electrical resistivity amorphous diamond-like carbon (14, 22) sandwiched between the magnetoresistive element and the thermally conductive member. In an MR head (12), at least one of the half-gaps of the MR head is fabricated of the amorphous diamond-like carbon film to dissipate heat from the MR element to the thermally conductive magnetic film(s) and shield the MR element from the magnetic film(s).

    摘要翻译： PCT No.PCT / US93 / 12685 Sec。 371日期1994年04月15日 102（e）日期1994年04月15日PCT 1993年12月30日提交组件包括磁阻元件（16），导热构件或磁性膜（18,26），以及导热，高电阻率无定形膜 夹在磁阻元件和导热构件之间的类金刚石碳（14,22）。 在MR头（12）中，MR头的半间隙中的至少一个由非晶类金刚石碳膜制成，以将热量从MR元件散发到导热磁性膜并屏蔽MR 元件。

    Diamond-like carbon encapsulation of magnetic heads
    7.
    发明授权
    Diamond-like carbon encapsulation of magnetic heads 失效
    钻石状碳封装磁头

    公开(公告)号：US5718949A

    公开(公告)日：1998-02-17

    申请号：US722910

    申请日：1996-09-27

    申请人： Allan E. Schultz ,  L. Vincent Ruscello ,  William H. Nunne

    发明人： Allan E. Schultz ,  L. Vincent Ruscello ,  William H. Nunne

    IPC分类号： G11B5/31 ,  C23C16/26 ,  G11B5/127

    CPC分类号： G11B5/3106

    摘要： A thin film magnetic transducer supported on a substrate includes a coil that terminates at pads supported on the substrate. A layer of diamond-like carbon material encapsulates the head, substrate and coil, but not the pads. A thin layer of diamond-like carbon is deposited over the exposed portions of the transducer, coil and substrate. Three techniques are described for exposing the pads including employing a photoresist mask, depositing an adhesive layer of silicon over the conductive paths but not the pads, and using a photoresist mask to etch the diamond-like carbon layer over the pads and breaking down the silicon adhesive layer with a design voltage.

    摘要翻译： 支撑在基板上的薄膜磁换能器包括终止在衬底上的衬垫上的线圈。 一层类似钻石的碳材料封装了头部，基底和线圈，但不包括垫片。 在传感器，线圈和基板的暴露部分上沉积一层类似金刚石的碳。 描述了三种技术，用于曝光焊盘，包括采用光致抗蚀剂掩模，在导电路径上沉积硅粘合剂层而不是焊盘，并且使用光致抗蚀剂掩模在焊盘上蚀刻类金刚石碳层并分解硅 具有设计电压的粘合剂层。

    Method of fabricating an inverted magnetoresistive head
    8.
    发明授权
    Method of fabricating an inverted magnetoresistive head 失效
    制造反向磁阻头的方法

    公开(公告)号：US5640753A

    公开(公告)日：1997-06-24

    申请号：US477290

    申请日：1995-06-07

    申请人： Allan E. Schultz ,  Frank S. Stageberg ,  Kenneth P. Ash ,  Brian S. Zak

    发明人： Allan E. Schultz ,  Frank S. Stageberg ,  Kenneth P. Ash ,  Brian S. Zak

    IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3967 ,  G11B5/3903 ,  G11B5/3163 ,  Y10T29/49034 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49067

    摘要： A method of fabricating an inverted magnetoresistive head is disclosed. The method includes fabricating a writer. The writer includes a bottom pole positioned within a recessed substrate. The bottom pole is filled with copper coils and polymer. A write gap, a pole tip, and a top pole/bottom shield are fabricated on a portion of the polymer. A top surface of both the polymer and the write gap are planarized to provide a substantially smooth surface upon which a reader can be placed. The reader is fabricated on top of the writer and includes a first reader gap, a magnetoresistive element, a second reader gap, and a shield.

    摘要翻译： 公开了一种制造反相磁阻磁头的方法。 该方法包括制作作者。 写入器包括位于凹入的衬底内的底极。 底极填充有铜线圈和聚合物。 在聚合物的一部分上制造写间隙，极尖和顶极/底屏蔽。 聚合物和写入间隙的顶表面被平坦化以提供基本平滑的表面，读取器可以放置在该基本光滑的表面上。 读写器在写入器的顶部制造并且包括第一读取器间隙，磁阻元件，第二读取器间隙和屏蔽。

    Diamond-like carbon and oxide bilayer insulator for magnetoresistive transducers
    9.
    发明授权
    Diamond-like carbon and oxide bilayer insulator for magnetoresistive transducers 失效
    用于磁阻换能器的类金刚石碳和氧化物双层绝缘体

    公开(公告)号：US06215630B1

    公开(公告)日：2001-04-10

    申请号：US08741277

    申请日：1996-10-30

    申请人： Allan E. Schultz ,  L. Vincent Ruscello ,  William H. Nunne

    发明人： Allan E. Schultz ,  L. Vincent Ruscello ,  William H. Nunne

    IPC分类号： G11B533

    CPC分类号： G11B5/3906 ,  G11B5/3163 ,  G11B5/3903 ,  H01F41/34 ,  Y10T409/303752

    摘要： A magnetic structure is formed by depositing a layer of diamond-like carbon onto the exposed surface of an a first material and depositing a layer of second material onto the layer of diamond-like carbon. A photoresist is applied to the exposed surface of the second layer and is patterned in the form of the desire structure. The exposed portions of the second layer are removed with a wet etchant that does not attack the diamond-like carbon layer. Thereafter, any remaining photoresist is removed.

    摘要翻译： 通过在第一材料的暴露表面上沉积一层类金刚石碳并将一层第二材料沉积到类金刚石碳层上形成磁性结构。 将光致抗蚀剂施加到第二层的暴露表面，并以期望结构的形式进行图案化。 用不侵蚀类金刚石碳层的湿蚀刻剂去除第二层的暴露部分。 此后，除去任何剩余的光致抗蚀剂。

    Inverted magnetoresistive head
    10.
    发明授权
    Inverted magnetoresistive head 失效
    倒置磁阻头

    公开(公告)号：US5668689A

    公开(公告)日：1997-09-16

    申请号：US695756

    申请日：1996-08-08

    申请人： Allan E. Schultz ,  Frank S. Stageberg ,  Kenneth P. Ash ,  Brian S. Zak

    发明人： Allan E. Schultz ,  Frank S. Stageberg ,  Kenneth P. Ash ,  Brian S. Zak

    IPC分类号： G11B5/39

    CPC分类号： G11B5/3903 ,  G11B5/3967

    摘要： An inverted magnetoresistive head is disclosed. The inverted magnetoresistive head includes a reader positioned on top of a writer. The writer includes a bottom pole, a polymer insulator, a write gap, a pole tip and a top pole. The reader includes a bottom shield, a first reader gap, a magnetoresistive element, electrical contacts, a second reader gap and a shield.

    摘要翻译： 公开了一种反转磁阻磁头。 反转磁阻头包括位于写入器顶部的读取器。 作者包括底极，聚合物绝缘体，写间隙，极尖和顶极。 读取器包括底部屏蔽，第一读取器间隙，磁阻元件，电触点，第二读取器间隙和屏蔽。