公开(公告)号：EP0634740B1

公开(公告)日：1999-09-22

申请号：EP94304883.5

申请日：1994-07-04

申请人： International Business Machines Corporation

发明人： Chen, Mao-Min ,  Fontana, Robert Edward ,  Krounbi, Mohamad Towfik ,  Kung, Kenneth Ting-Yuan ,  Lee, James Hsi-Tang ,  Lo, Jyh-Shliey Jerry ,  Tsang, Ching Hwa ,  Wang, Po-Kang

IPC分类号： G11B5/39

CPC分类号： G11B5/399

公开(公告)号：EP0634740A3

公开(公告)日：1996-01-31

申请号：EP94304883.5

申请日：1994-07-04

申请人： International Business Machines Corporation

发明人： Chen, Mao-Min ,  Fontana, Robert Edward ,  Krounbi, Mohamad Towfik ,  Kung, Kenneth Ting-Yuan ,  Lee, James Hsi-Tang ,  Lo, Jyh-Shliey Jerry ,  Tsang, Ching Hwa ,  Wang, Po-Kang

IPC分类号： G11B5/39

CPC分类号： G11B5/399

摘要： An MR transducer (70) is disclosed having passive end regions (71) separated by a central active region (77) in which an MR layer (81) is formed over substantially only the central active region and in which a magnetic bias layer (75,79) is formed in each passive end region. In one embodiment, each of the magnetic bias layers includes a layer of ferromagnetic material (79) and a layer of antiferromagnetic material (75) overlaying and in contact with the ferromagnetic layer to provide an exchange-coupled magnetic bias field. Alternatively a hard magnetic material is used to form the biasing layer. Each of the magnetic bias layers form an abutting junction (87) having magnetic and electrical continuity with the MR layer to produce a stable longitudinal magnetic bias field in the transducer, even when the length of the active region is small to accommodate small track widths.

公开(公告)号：EP0634740A2

公开(公告)日：1995-01-18

申请号：EP94304883.5

申请日：1994-07-04

申请人： International Business Machines Corporation

发明人： Chen, Mao-Min ,  Fontana, Robert Edward ,  Krounbi, Mohamad Towfik ,  Kung, Kenneth Ting-Yuan ,  Lee, James Hsi-Tang ,  Lo, Jyh-Shliey Jerry ,  Tsang, Ching Hwa ,  Wang, Po-Kang

IPC分类号： G11B5/39

CPC分类号： G11B5/399

摘要： An MR transducer (70) is disclosed having passive end regions (71) separated by a central active region (77) in which an MR layer (81) is formed over substantially only the central active region and in which a magnetic bias layer (75,79) is formed in each passive end region. In one embodiment, each of the magnetic bias layers includes a layer of ferromagnetic material (79) and a layer of antiferromagnetic material (75) overlaying and in contact with the ferromagnetic layer to provide an exchange-coupled magnetic bias field. Alternatively a hard magnetic material is used to form the biasing layer. Each of the magnetic bias layers form an abutting junction (87) having magnetic and electrical continuity with the MR layer to produce a stable longitudinal magnetic bias field in the transducer, even when the length of the active region is small to accommodate small track widths.

摘要翻译： 公开了一种磁阻（MR）读取传感器，其具有被中心有源区域隔开的被动端区域，其中MR层仅在中心有源区域上形成，并且在每个被动端区域中形成磁偏置层。 在一个实施例中，每个磁偏置层包括铁磁材料层和与铁磁层重叠并接触的反铁磁材料层，以提供交换耦合磁偏置场。 或者，使用硬磁性材料来形成偏置层。 每个磁偏置层形成与MR层具有磁性和电连续性的邻接结，以便在换能器中产生稳定的纵向磁偏置场，即使当有源区的长度小以适应小轨道宽度时。