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41.发明授权公开(公告)号：US06813115B2
公开(公告)日：2004-11-02
申请号：US10235356
申请日：2002-09-05
IPC分类号： G11B5127
CPC分类号： G11B5/1278 , G11B5/187 , G11B5/3153 , G11B2005/0029
摘要： A single pole magnetic recording head is provided according to the present invention for perpendicular magnetic recording on a recording medium. The magnetic recording head includes a main magnetic pole and a coil magnetically coupled to the main pole for magnetizing the main pole in a first magnetization direction. The magnetic recording head further includes a layer of ferromagnetic material anti-ferromagnetically coupled to the main pole such that magnetization of the ferromagnetic layer is in a second magnetization direction substantially anti-parallel to the first magnetization direction of the main pole.
摘要翻译： 根据本发明提供了一种用于垂直磁记录在记录介质上的单极磁记录头。 磁记录头包括主磁极和磁耦合到主极的线圈，用于在第一磁化方向上磁化主极。 磁记录头还包括铁磁材料层，其与铁磁磁性地耦合到主极，使得铁磁层的磁化强度基本上与主极的第一磁化方向反平行。
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42.发明授权公开(公告)号：US06777113B2
公开(公告)日：2004-08-17
申请号：US10116577
申请日：2002-04-04
申请人： Isabel G. Trindade , Sharat Batra , Dieter K. Weller , Yukiko Kubota , Kurt W. Wierman , James K. Howard , Ganping Ju
发明人： Isabel G. Trindade , Sharat Batra , Dieter K. Weller , Yukiko Kubota , Kurt W. Wierman , James K. Howard , Ganping Ju
IPC分类号： G11B5667
CPC分类号： G11B5/66 , Y10T428/31833
摘要： A perpendicular magnetic recording medium includes a hard magnetic recording layer and a soft magnetic underlayer adjacent the hard magnetic recording layer. The soft magnetic underlayer includes first and second ferromagnetically coupled multilayer structures and a coupling layer positioned between the first and second multilayer structures for antiferromagnetically coupling the first and second multilayer structures. A magnetic disc drive storage system incorporating such a perpendicular magnetic recording medium and a method of making such a perpendicular magnetic recording medium are also included.
摘要翻译： 垂直磁记录介质包括硬磁记录层和与硬磁记录层相邻的软磁性底层。 软磁性底层包括第一和第二铁磁耦合多层结构以及位于第一和第二多层结构之间的用于反铁磁耦合第一和第二多层结构的耦合层。 还包括一种包含这种垂直磁记录介质的磁盘驱动器存储系统和制造这种垂直磁记录介质的方法。
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公开(公告)号：US06707642B1
公开(公告)日：2004-03-16
申请号：US09777033
申请日：2001-02-05
申请人： Sharat Batra
发明人： Sharat Batra
IPC分类号： G11B523
CPC分类号： G11B5/3116 , G11B5/012 , G11B5/1871 , G11B5/23 , G11B5/2455 , G11B5/2457 , G11B5/312 , G11B5/313
摘要： A longitudinal recording head for use with magnetic recording media includes first and second writes poles in which the second pole has sides that wrap around a portion of the first pole in order to reduce or eliminate side fringing fields. The wrapped around sides of the second pole have relatively small cross sections away from the air bearing surface of the recording head, and relatively large cross sections at the air bearing surface. The sides may saturate in the narrow regions away from the air bearing surface, but do not saturate in the broad regions adjacent the air bearing surface. Longitudinal recording heads incorporating the wrapped around second pole sides effectively reduce or eliminate side fringing and are capable of improved recording densities.
摘要翻译： 与磁记录介质一起使用的纵向记录头包括第一和第二写入极，其中第二极具有围绕第一极的一部分的侧面，以便减少或消除边缘场。 第二极的缠绕的侧面具有远离记录头的空气支承表面的相对小的横截面，以及在空气轴承表面处的相对较大的横截面。 侧面可能在远离空气轴承表面的狭窄区域饱和，但不能在靠近空气轴承表面的宽阔区域饱和。 结合缠绕在第二极侧的纵向记录头有效地减少或消除侧边缘并且能够改善记录密度。
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44.发明授权
公开(公告)号：US5314596A
公开(公告)日：1994-05-24
申请号：US888105
申请日：1992-05-26
CPC分类号： G11B5/3153 , G11B5/3113 , G11B5/3163
摘要： A thin film magnetic recording head for high-density recording applications. The head includes a pole formed from at least two ferromagnetic material layers with one layer having high anisotropy (H.sub.k) and low permeability (.mu.), and the other layer having low H.sub.k and high .mu.. The high H.sub.k layer provides the lower magnetic impedance flux path in the tip region and the low H.sub.k layer provides the lower magnetic impedance path in the yoke region of the head. A non-magnetic film may be disposed between the layers, with a thickness chosen to minimize domain flux coupling of the two magnetic layers, while allowing magnetic signal flux transfer between layers at an appropriate point between the tip and the yoke. The pole may be sculpted so that the low H.sub.k layer extends only partially into the tip region, or so that the high H.sub.k layer extends only partially into the yoke. Alternatively, the invention may use a laminated, high permeability layer and a homogeneous layer in place of the high H.sub.k and low H.sub.k layers.
摘要翻译： 一种用于高密度记录应用的薄膜磁记录头。 头包括由至少两个铁磁材料层形成的极，一个具有高各向异性（Hk）和低磁导率（μ）的层，另一层具有低Hk和高mu。 高Hk层在尖端区域提供较低的磁阻抗通量，低Hk层在磁头的磁轭区域提供较低的磁阻抗路径。 可以在层之间设置非磁性膜，其厚度被选择为最小化两个磁性层的磁通量耦合，同时允许在尖端和轭之间的适当点处的层之间的磁信号通量传递。 极可以被雕刻，使得低Hk层仅部分地延伸到尖端区域，或者使得高Hk层仅部分地延伸到轭中。 或者，本发明可以使用层叠的高透过性层和均匀层代替高Hk和低Hk层。
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公开(公告)号：US5157570A
公开(公告)日：1992-10-20
申请号：US546280
申请日：1990-06-29
IPC分类号： G11B5/31
CPC分类号： G11B5/3153 , G11B5/3113 , G11B5/3163
摘要： A thin film magnetic recording head for high-density recording applications. The head includes a pole formed from at least two ferromagnetic material layers with one layer having high anisotropy (H.sub.k) and low permeability (.mu.), and the other layer having low H.sub.k and high .mu.. The high H.sub.k layer provides the lower magnetic impedance flux path in the tip region and the low H.sub.k layer provides the lower magnetic impedance path in the yoke region of the head. A non-magnetic film may be disposed between the layers, with a thickness chosen to minimize domain flux coupling of the two magnetic layers, while allowing magnetic signal flux transfer between layers at an appropriate point between the tip and the yoke. The pole may be sculpted so that the low H.sub.k layer extends only partially into the tip region, or so that the high H.sub.k layer extends only partially into the yoke. Alternatively, the invention may use a laminated, high permeability layer and a homogeneous layer in place of the high H.sub.k and low H.sub.k layers.
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