公开(公告)号：US5018037A

公开(公告)日：1991-05-21

申请号：US419246

申请日：1989-10-10

申请人： Mohamad T. Krounbi ,  Otto Voegeli ,  Po-Kang Wang

发明人： Mohamad T. Krounbi ,  Otto Voegeli ,  Po-Kang Wang

IPC分类号： G11B5/39

CPC分类号： G11B5/3903

摘要： A magnetoresistive (MR) read transducer having passive end regions separated by a central active region in which an MR layer is formed which extends over substantially only the central active region and in which a hard magnetic layer is formed in each end region. The hard magnetic layers form an abutting junction having electrical and magnetic continuity with the MR layer to produce a longitudinal bias in the MR sensor. The transducer is produced by a method in which the same stencil defines the extent of both the MR layer and the hard magnetic layers so that the abutting junctions are formed easily and reliably.

公开(公告)号：US4939837A

公开(公告)日：1990-07-10

申请号：US239562

申请日：1988-09-01

申请人： Mohamad T. Krounbi

发明人： Mohamad T. Krounbi

IPC分类号： G11B5/39

CPC分类号： G11B5/3903 ,  Y10T29/49034 ,  Y10T29/49044 ,  Y10T29/49046

摘要： A process for the batch fabrication of an array of shielded magnetoresistive (MR) read transducers comprising the steps of depositing a full film over the entire substrate of a first magnetic shield layer, a first non-magnetic gap layer and sputter depositing a layer of MR sensor material in the presence of a magnetic field for orienting the anisotropy axes of the layers of MR sensor material in a chosen direction. The MR sensor layer and the first gap layer are permitted to produce a plurality of MR read transducers, and the first magnetic shield layer is then patterned to produce a first shield for each of the MR read transducers. A second gap layer and a second shield layer are patterned to produce a second shield for each of the MR read transducers.

公开(公告)号：US08104166B1

公开(公告)日：2012-01-31

申请号：US10741857

申请日：2003-12-19

申请人： Jinqiu Zhang ,  Ming Zhao ,  Mohamad T. Krounbi ,  Henry Yuan ,  Lien-Chang Wang

发明人： Jinqiu Zhang ,  Ming Zhao ,  Mohamad T. Krounbi ,  Henry Yuan ,  Lien-Chang Wang

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/3163 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/398 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A method is provided for fabricating a read element with leads that overlay a top surface of a sensor of the read element. The method includes forming a mask over a sensor layer, then using the mask to define the sensor from the sensor layer. The mask is then narrowed and a lead layer is formed that overlays both ends of the top surface of the sensor without covering a center portion of the top surface.

摘要翻译： 提供了一种制造读取元件的方法，该元件具有覆盖读取元件的传感器的顶表面的引线。 该方法包括在传感器层上形成掩模，然后使用掩模从传感器层定义传感器。 然后使掩模变窄，并且形成覆盖传感器顶表面两端的引线层，而不覆盖顶表面的中心部分。

公开(公告)号：US07639457B1

公开(公告)日：2009-12-29

申请号：US10788765

申请日：2004-02-27

申请人： Yingjian Chen ,  Wei Zhang ,  Jinqiu Zhang ,  Haifeng Wang ,  Satoru Araki ,  Mohamad T. Krounbi

发明人： Yingjian Chen ,  Wei Zhang ,  Jinqiu Zhang ,  Haifeng Wang ,  Satoru Araki ,  Mohamad T. Krounbi

IPC分类号： G11B5/39 ,  G11B5/127

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/098 ,  G11B5/3163 ,  G11B5/3932 ,  G11B2005/3996 ,  H01F10/3272

摘要： A magnetic sensor is disclosed comprising an antiferromagnetic layer; a first ferromagnetic layer disposed over the antiferromagnetic layer, the first ferromagnetic layer having a magnetization that is pinned by the antiferromagnetic layer; a second ferromagnetic layer disposed over the first ferromagnetic layer, the second ferromagnetic layer having a magnetization that rotates due to an applied magnetic field; a third ferromagnetic layer disposed adjacent to an end of the second ferromagnetic layer, the third ferromagnetic layer having a primarily in-plane magnetization providing a magnetic field to stabilize the end of the second ferromagnetic layer; an amorphous, metallic, nonmagnetic underlayer disposed adjacent to the antiferromagnetic layer; and a crystalline seed layer disposed between the underlayer and the third ferromagnetic layer, the seed layer having a crystalline structure that promotes the in-plane magnetization of the third ferromagnetic layer.

摘要翻译： 公开了一种磁传感器，其包括反铁磁层; 设置在所述反铁磁层上的第一铁磁层，所述第一铁磁层具有由所述反铁磁层固定的磁化; 设置在所述第一铁磁层上的第二铁磁层，所述第二铁磁层具有由施加的磁场旋转的磁化; 与所述第二铁磁层的端部相邻设置的第三铁磁层，所述第三铁磁层具有主要的面内磁化，提供磁场以稳定所述第二铁磁层的端部; 邻近反铁磁层设置的无定形金属非磁性底层; 以及设置在所述底层和所述第三铁磁层之间的结晶种子层，所述种子层具有促进所述第三铁磁层的平面内磁化的晶体结构。

公开(公告)号：US07386933B1

公开(公告)日：2008-06-17

申请号：US11295243

申请日：2005-12-06

申请人： Mohamad T. Krounbi ,  Ming Zhao ,  Yining Hu ,  Jim Watterston

发明人： Mohamad T. Krounbi ,  Ming Zhao ,  Yining Hu ,  Jim Watterston

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3967 ,  G11B2005/3996 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A method for fabricating a magnetic recording head writer. The writer includes a bottom magnetic pole and a write gap formed over the bottom pole and a coil trench formed in the bottom pole. A top magnetic pole is provided as two layers with the first layer including front and back tips with spaced apart walls positioned adjacent the trench bottom defining trench sides. A pole cover layer is included that is made up of a thin layer of insulating material deposited to cover sides and bottom of the coil trench. A bottom coil is formed on the pole cover layer in the bottom of the coil trench and coil insulation is provided between coil elements and adjacent trench walls and covemg the coil. A top coil with insulation is formed over the planarized bottom coil insulation and the top pole second layer is formed over the top coil.

摘要翻译： 一种制造磁记录头写入器的方法。 写入器包括形成在底极上的底部磁极和写入间隙以及形成在底部极中的线圈沟槽。 顶部磁极设置为两层，其中第一层包括前部和后部末端，间隔开的壁定位在沟槽底部限定沟槽侧面附近。 包括极覆盖层，其由沉积成覆盖线圈沟槽的侧面和底部的绝缘材料薄层构成。 底线圈形成在线圈沟槽底部的极覆盖层上，线圈绝缘体设置在线圈元件与相邻的沟槽壁之间并且缠绕线圈。 在平坦化的底部线圈绝缘体上形成具有绝缘的顶部线圈，并且顶部第二层形成在顶部线圈上。

公开(公告)号：US07283327B1

公开(公告)日：2007-10-16

申请号：US11451770

申请日：2006-06-13

申请人： Francis H. Liu ,  Kroum S. Stoev ,  Mohamad T. Krounbi

发明人： Francis H. Liu ,  Kroum S. Stoev ,  Mohamad T. Krounbi

IPC分类号： G11B5/17 ,  G11B5/56 ,  G11B21/02

CPC分类号： G11B5/60 ,  G11B5/6064

摘要： A magnetic write head includes a magnetic yoke having a first pole and a second pole. The first pole and the second pole each terminate at an air bearing surface. The first pole is magnetically coupled to the second pole in a backgap region. The magnetic write head further includes a electrically conductive write coil magnetically coupled to the magnetic yoke. The magnetic write head further includes a resistive heater coil having a first coil turn and a second coil turn. The heater coil is electrically isolated from the write coil. At least a portion of the first coil turn is between the first pole and the second pole and between the air bearing surface and the backgap region. At least a portion of the second coil turn is between the first pole and the second pole and between the air bearing surface and the backgap region. The portion of the first coil turn overlaps the portion of the second coil turn.

摘要翻译： 磁写头包括具有第一极和第二极的磁轭。 第一极和第二极各自终止于空气轴承表面。 第一极在后隙区域磁耦合到第二极。 磁写头还包括磁耦合到磁轭的导电写入线圈。 磁写头还包括具有第一线圈匝和第二线圈匝的电阻加热器线圈。 加热器线圈与写入线圈电隔离。 第一线圈匝的至少一部分在第一极和第二极之间以及空气支承表面和后隙区之间。 第二线圈匝的至少一部分在第一极和第二极之间以及空气支承表面和后隙区之间。 第一线圈圈的部分与第二线圈匝的部分重叠。

公开(公告)号：US06751055B1

公开(公告)日：2004-06-15

申请号：US10042674

申请日：2002-01-08

申请人： Arshad Alfoqaha ,  Mohamad T. Krounbi ,  Sandrawattie Sankar ,  David J. Seagle ,  Kenneth R. Young

发明人： Arshad Alfoqaha ,  Mohamad T. Krounbi ,  Sandrawattie Sankar ,  David J. Seagle ,  Kenneth R. Young

IPC分类号： G11B531

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/17 ,  G11B5/3103 ,  G11B5/3109 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/3136 ,  G11B5/332 ,  G11B5/3909 ,  G11B5/3967 ,  G11B5/40 ,  G11B2005/3996

摘要： An inductive transducer has inorganic nonferromagnetic material disposed in an apex region adjacent to a submicron nonferromagnetic gap in a magnetic core. The inorganic nonferromagnetic material has a much lower coefficient of thermal expansion than that of hardbaked photoresist, reducing pole tip protrusion even if other insulation surrounding the coil sections within the core is made of hardbaked photoresist. Alternatively, the entire insulation surrounding the coil sections within the core, in addition to the apex region, can be formed of inorganic nonferromagnetic material, further reducing pole tip protrusion. The transducer has SiO2 rather than alumina in an undercoat layer joining the wafer substrate and the thin film layers of the transducer. SiO2 may also replace alumina in other areas, such as a piggyback layer joining the inductive transducer with a magnetoresistive transducer.

摘要翻译： 感应换能器具有无机非铁磁材料，其设置在与磁芯中的亚微米非铁磁间隙相邻的顶点区域中。 无机非铁磁材料的热膨胀系数比硬化的光致抗蚀剂要低得多，即使在芯体内的线圈部分周围的其它绝缘体也是由硬质的光致抗蚀剂制成的，也可以减小极尖突起。 或者，除了顶点区域之外围绕线圈部分的整个绝缘体可以由无机非铁磁材料形成，进一步减小极尖突起。 传感器在连接晶片衬底和换能器的薄膜层的底涂层中具有SiO 2而不是氧化铝。 SiO 2还可以在其它区域中替代氧化铝，例如将感应换能器与磁阻换能器接合的搭载背衬层。

公开(公告)号：US5452165A

公开(公告)日：1995-09-19

申请号：US214902

申请日：1994-03-16

申请人： Mao-Min Chen ,  Kochan Ju ,  Mohamad T. Krounbi ,  Denny D. Tang ,  Po-Kang Wang

发明人： Mao-Min Chen ,  Kochan Ju ,  Mohamad T. Krounbi ,  Denny D. Tang ,  Po-Kang Wang

IPC分类号： G11B5/008 ,  G11B5/012 ,  G11B5/31 ,  G11B5/48 ,  G11B5/56 ,  G11B5/584 ,  G11B5/29

CPC分类号： G11B5/3103 ,  G11B5/3183 ,  G11B5/4886 ,  G11B5/4893 ,  G11B5/56 ,  G11B5/584 ,  G11B5/00817 ,  G11B5/012

摘要： The present invention includes a plurality of thin film magnetic heads which are arranged in a linear array with a spacing D between adjacent heads. The pole pieces of the magnetic heads are positioned in a side by side relationship in contrast to the normal pancake type of magnetic head. The linear array is angled at a skew angle .theta. with respect to the direction of travel of the magnetic medium. The track pitch is then D sin .theta.. The track width is substantially equal to the thickness of the pole tips P1T and P2T of the magnetic heads. This thickness can be in the order of 3 .mu.m. With such a pole tip thickness the track pitch of each magnetic head in the linear array can be 3-4 .mu.m. A plurality of narrow data tracks can then be provided with minimum pitch by a corresponding number of magnetic heads. The write signals are simultaneously fed to the heads or the read signals are simultaneously fed to the heads. This allows high data rates to be processed. The invention also provides different azimuth between adjacent heads to minimize cross talk between the tracks caused by track misregistration. Additional magnetic heads can be employed for servo control as needed.

摘要翻译： 本发明包括多个薄膜磁头，其以相邻磁头之间的间隔D布置成线性阵列。 与正常的煎饼型磁头相反，磁头的极片与并排的关系定位。 线性阵列相对于磁性介质的行进方向以偏斜角θ成角度。 轨道间距为Dsinθ。 轨道宽度基本上等于磁头的极尖P1T和P2T的厚度。 该厚度可以在3μm左右。 具有这样的极尖厚度，线阵列中每个磁头的轨道间距可以是3-4μm。 然后可以通过相应数量的磁头以最小间距来提供多个窄数据轨道。 写入信号被同时馈送到头部，或者读取信号被同时馈送到头部。 这样可以处理高数据速率。 本发明还提供相邻头部之间的不同方位角，以最小化由轨道重合失调引起的轨道之间的串扰。 可根据需要使用额外的磁头进行伺服控制。

公开(公告)号：US5375023A

公开(公告)日：1994-12-20

申请号：US998171

申请日：1992-12-29

申请人： Kochan Ju ,  Mohamad T. Krounbi ,  Po-Kang Wang

发明人： Kochan Ju ,  Mohamad T. Krounbi ,  Po-Kang Wang

IPC分类号： G11B5/31 ,  G11B5/23 ,  G11B5/127 ,  G11B5/147

CPC分类号： G11B5/3163 ,  G11B5/3116

摘要： A thin film inductive head having staggered pole-tips with a self-aligned recording gap region. The recording gap region is bounded by stepped pole-tip element with the steps made large with respect to the gap thickness. The pole-tip layers extend back from the air bearing surface to form a throat region that is also large with respect to the gap thickness. The self-aligned staggered pole-tip geometry is suitable for submicron track widths because the pole-tips may themselves be much wider and the self-aligned configuration avoids submicron masking and registration difficulties. The stepped pole-tip surfaces also eliminate the side-writing problem known in the art for overlapping thin film poles.

摘要翻译： 具有具有自对准记录间隙区域的交错极尖的薄膜感应头。 记录间隙区域由步进的极尖元件限定，相对于间隙厚度的步长较大。 极尖层从空气支承表面向后延伸以形成相对于间隙厚度也很大的喉部区域。 自对准交错极尖几何形状适用于亚微米轨道宽度，因为极尖本身可能宽得多，并且自对准配置避免了亚微米掩蔽和配准困难。 阶梯式极尖表面也消除了本领域已知的用于重叠薄膜极的侧面写入问题。

公开(公告)号：US5285340A

公开(公告)日：1994-02-08

申请号：US843676

申请日：1992-02-28

申请人： Kochan Ju ,  Mohamad T. Krounbi

发明人： Kochan Ju ,  Mohamad T. Krounbi

IPC分类号： G11B5/31 ,  G11B5/187 ,  G11B5/23 ,  G11B5/33

CPC分类号： G11B5/3116 ,  G11B5/3163

摘要： A thin film magnetic head comprises a first magnetic yoke layer extending from a back gap region to a sensing edge such as an air bearing surface (ABS), and a second magnetic yoke layer contacting the first magnetic yoke layer at the back gap region and extending to the ABS in a position aligned with, but spaced from, the first magnetic yoke layer. A pole tip structure, with geometry formed by a single photolithographic process, comprising a first pole tip layer, a gap forming layer, and a second pole tip layer is positioned between the first and second magnetic yoke layers at the ABS with the first pole tip layer in contact with the first magnetic yoke layer and the second pole tip layer in contact with the second magnetic yoke layer at the ABS.

摘要翻译： 薄膜磁头包括从后间隙区域延伸到诸如空气轴承表面（ABS）的感测边缘的第一磁轭层，以及在后间隙区域处接触第一磁轭层的第二磁轭层，并且延伸 在与第一磁轭层对准但与第一磁轭层隔开的位置处的ABS。 具有通过单个光刻工艺形成的几何形状的极尖结构包括第一极尖端层，间隙形成层和第二极尖端层，其位于ABS的第一和第二磁轭层之间，具有第一极尖 在与ABS的第二磁轭层接触的第一磁轭层和第二极尖端层接触的层。