公开(公告)号：US5923502A

公开(公告)日：1999-07-13

申请号：US576496

申请日：1995-12-21

申请人： Thomas Charles Christensen ,  Jodie Ann Christner ,  Earl Albert Cunningham ,  Jay Michael Mosbrucker

发明人： Thomas Charles Christensen ,  Jodie Ann Christner ,  Earl Albert Cunningham ,  Jay Michael Mosbrucker

IPC分类号： G11B5/11 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48 ,  G11B23/00 ,  G11B5/008

CPC分类号： G11B5/3903 ,  G11B5/11 ,  G11B23/0007 ,  G11B5/3143 ,  G11B5/4806

摘要： A magnetic head including a shielded MR element which incorporates a low reluctance path between the shields to reduce interference picked up by inductive reading of the shields. The low reluctance path is provided outside a conductive loop of material which includes the MR element and its associated leads. The low reluctance path may include a magnetic short between the two shields.

摘要翻译： 包括屏蔽MR元件的磁头，其在屏蔽之间包含低磁阻路径，以减少通过屏蔽的感应读数拾取的干扰。 低磁阻路径设置在包括MR元件及其相关引线的材料的导电回路外部。 低磁阻路径可以包括两个屏蔽之间的磁短路。

公开(公告)号：US5859739A

公开(公告)日：1999-01-12

申请号：US640530

申请日：1996-05-01

申请人： Earl Albert Cunningham ,  Jodie Ann Christner

发明人： Earl Albert Cunningham ,  Jodie Ann Christner

IPC分类号： G11B5/39 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/035 ,  G11B5/55 ,  G11B5/596 ,  G11B19/04

CPC分类号： G11B5/5547 ,  G11B19/04 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/5526 ,  G11B5/59683 ,  G11B2005/0013 ,  G11B2005/0016 ,  G11B5/035

摘要： A rigid disk drive unit includes head assemblies having both inductive and magnetoresistive heads. When information is read from a disk surface, signals from the inductive head and the magnetoresistive head are combined to provide an output signal, thereby to overcome disadvantages of using either signal alone. The relative contributions of the magnetoresistive and inductive signals are varied to optimize performance depending on the radial position of the head assembly over a magnetic disk and upon whether the information being read is data or servo position information. The inductive signal is ignored during data recovery procedure head shift operations.

摘要翻译： 刚性盘驱动单元包括具有感应磁头和磁阻头的磁头组件。 当从盘表面读取信息时，来自感应头和磁阻头的信号被组合以提供输出信号，从而克服单独使用任一信号的缺点。 根据磁头组件在磁盘上的径向位置以及被读取的信息是数据还是伺服位置信息，磁阻和感应信号的相对贡献被改变以优化性能。 在数据恢复过程头移动操作期间，感应信号被忽略。

公开(公告)号：US5748415A

公开(公告)日：1998-05-05

申请号：US739240

申请日：1996-10-29

申请人： Jodie Ann Christner ,  Earl Albert Cunningham

发明人： Jodie Ann Christner ,  Earl Albert Cunningham

IPC分类号： G11B5/39 ,  G11B5/127

CPC分类号： G11B5/398

摘要： A magnetoresistive (MR) head includes an MR film that has a bottom edge to be positioned adjacent to a magnetic medium, a first side with a first outside edge, and a second side with a second outside edge. The first outside edge extends in a direction that forms an obtuse angle with the bottom edge. A first lead layer is electrically connected to the magnetoresistive film at the first outside edge, and a second lead layer is electrically connected to the magnetoresistive film at the second outside edge. Because of the orientation of the first outside edge of the MR film, magnetic flux from the magnetic medium is more likely to propagate through the MR film without being impeded by the first outside edge, and thus the read sensitivity profile of the MR head is improved. In a preferred embodiment, the first and the second outside edges of the MR film both include a lower portion substantially perpendicular to the bottom edge and an upper portion extending in a direction that forms an obtuse angle with the bottom edge. This minimizes variation in the width of the MR film due to lapping height tolerance because the lower portions of the first and second outside edges are parallel to one another. In another preferred embodiment, the height of the MR film narrows from the second outside edge to the first outside edge. This further improves the read sensitivity profile of the MR head.

摘要翻译： 磁阻（MR）头包括MR膜，其具有邻近磁介质定位的底边缘，具有第一外边缘的第一侧和具有第二外边缘的第二侧。 第一外边缘沿与底边形成钝角的方向延伸。 第一引线层在第一外部边缘处电连接到磁阻膜，并且第二引线层在第二外部边缘处电连接到磁阻膜。 由于MR膜的第一外边缘的取向，来自磁介质的磁通更可能通过MR膜传播而不受第一外边缘的阻碍，因此改善了MR头的读灵敏度分布 。 在优选实施例中，MR膜的第一和第二外边缘都包括基本上垂直于底部边缘的下部和在与底部边缘形成钝角的方向上延伸的上部。 由于第一和第二外边缘的下部彼此平行，因此由于研磨高度公差，这使得MR膜的宽度的变化最小化。 在另一个优选实施例中，MR膜的高度从第二外边缘变窄到第一外边缘。 这进一步提高了MR磁头的读取灵敏度分布。