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    Magnetic write head employing multiple magnetomotive force (MMF) sources
    3.
    发明申请
    Magnetic write head employing multiple magnetomotive force (MMF) sources 审中-公开
    使用多个磁动势（MMF）源的磁写头

    公开(公告)号：US20080112080A1

    公开(公告)日：2008-05-15

    申请号：US11598419

    申请日：2006-11-13

    申请人： Byron Hassberg Lengsfield ,  Ian Robson McFadyen ,  James L. Nix ,  James Terrence Olson ,  Petrus Antonius Van Der Heijden ,  Bruce Wilson

    发明人： Byron Hassberg Lengsfield ,  Ian Robson McFadyen ,  James L. Nix ,  James Terrence Olson ,  Petrus Antonius Van Der Heijden ,  Bruce Wilson

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3123 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/3143

    摘要： A write head for perpendicular magnetic recording having a write pole and first and second return poles. The write head can include a first magnetomotive force source for delivering a magnetomotive force to the first return pole and the write pole and a second magnetomotive force source for delivering magnetomotive force to the second return pole and the write pole. The first and second magnetomotive force sources can be operated independently of one another so that different relative amounts of magnetomotive force can be applied to the first and second return poles. A trailing magnetic shield can be connected with one of the return poles, such as the second return poles, and the variation in magnetomotive force can be used to increase the amount of flux flowing through the trailing shield when increased field gradient is desired (such as when writing a transition), and to decrease the amount of flux through the trailing shield when decreased field gradient and increased write field are desired (such as when writing a long magnetic section on a magnetic medium).

    摘要翻译： 用于垂直磁记录的写头，具有写极和第一和第二返回极。 写头可以包括用于将磁动势传递到第一返回极和写极的第一磁动势源和用于将磁动势传递到第二返回极和写极的第二磁动势力源。 第一和第二磁动势源可以彼此独立地操作，使得可以将不同的相对量的磁动势施加到第一和第二返回极。 拖尾磁屏蔽可以与诸如第二返回极中的一个返回极连接，并且当需要增加磁场梯度时，可以使用磁动势的变化来增加流过后屏蔽的磁通量（例如 当写入转换时），并且当需要减小的场梯度和增加的写入场（例如当在磁介质上写入长磁场时）时，减小通过后屏蔽的通量的量。

    Perpendicular write head having a stepped flare structure and method of manufacture thereof
    10.
    发明授权
    Perpendicular write head having a stepped flare structure and method of manufacture thereof 有权
    具有阶梯式火炬结构的垂直写头及其制造方法

    公开(公告)号：US08797685B2

    公开(公告)日：2014-08-05

    申请号：US12646879

    申请日：2009-12-23

    申请人： Christian Rene Bonhote ,  Jeffrey S. Lille ,  Scott Arthur MacDonald ,  Xhavin Sinha ,  Petrus Antonius Van Der Heijden

    发明人： Christian Rene Bonhote ,  Jeffrey S. Lille ,  Scott Arthur MacDonald ,  Xhavin Sinha ,  Petrus Antonius Van Der Heijden

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3146 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3166 ,  G11B5/3169

    摘要： A magnetic write head for data recording having a magnetic write pole with a stepped magnetic shell structure that defines a secondary flare point. The secondary flare point defined by the magnetic shell portion can be more tightly controlled with respect to its distance from the air bearing surface (ABS) of the write head than can a traditional flare point that is photolithographically on the main pole structure. This allows the effective flare point of the write head to be moved much closer to the ABS than would otherwise be possible using currently available tooling and photolithography techniques. The write head also includes a non-magnetic spacer layer formed over the magnetic shell structure that is recessed from the ABS by a distance that is greater than that of the magnetic shell portion. A magnetic shield is formed over the magnetic shell and non-magnetic spacer.

    摘要翻译： 一种用于数据记录的磁写头，具有限定二次闪光点的阶梯状磁性壳结构的磁性写入极。 由磁性壳体部分限定的次级火炬点可以相对于与写入磁头的空气轴承表面（ABS）的距离比在主极结构上光刻的传统闪光点更加严格地控制。 这使得使用当前可用的工具和光刻技术可以使写入头的有效喇叭点移动得更接近ABS。 写头还包括形成在磁性壳结构上的非磁性间隔层，其从ABS凹陷的距离大于磁性壳部分的距离。 在磁性壳体和非磁性间隔物上形成磁屏蔽。