公开(公告)号：US06807027B2

公开(公告)日：2004-10-19

申请号：US10321043

申请日：2002-12-17

申请人： Peter Kevin Mark McGeehin ,  Alison Mary Bell ,  Alan Biggar Johnston

发明人： Peter Kevin Mark McGeehin ,  Alison Mary Bell ,  Alan Biggar Johnston

IPC分类号： G11B5147

CPC分类号： G11B5/1278 ,  G11B5/3133 ,  G11B5/3163

摘要： A perpendicular write head includes a main pole, a return pole, and conductive coils. The main pole includes a seedlayer and a magnetic layer that is plated upon the seedlayer. The seedlayer is nonmagnetic, electrically conductive, and corrosion-resistant. The return pole is separated from the main pole by a gap at an air bearing surface of the write head and is coupled to the main pole opposite the air bearing surface. The conductive coils are positioned at least in part between the main pole and the return pole.

摘要翻译： 垂直写头包括主极，返回极和导电线圈。 主极包括电镀在种层上的种子层和磁性层。 种子层是非磁性的，导电的和耐腐蚀的。 返回极通过写头的空气轴承表面处的间隙与主极分离，并且连接到与空气轴承表面相对的主极。 导电线圈至少部分地位于主极和返回极之间。

公开(公告)号：US08194508B2

公开(公告)日：2012-06-05

申请号：US12613391

申请日：2009-11-05

申请人： Alan Biggar Johnston ,  Dieter Klaus Weller ,  Mark Anthony Gubbins

发明人： Alan Biggar Johnston ,  Dieter Klaus Weller ,  Mark Anthony Gubbins

IPC分类号： G11B11/00

CPC分类号： G11B5/59616 ,  B82Y10/00 ,  G11B5/09 ,  G11B5/743 ,  G11B2005/001

摘要： The presently disclosed technology teaches a transducer head with a read sensor, a write pole, and one or more waveform sensors attached to the transducer head. Further, a waveform propagates in the direction of a BPM and the waveform sensor is configured to detect the waveform after it is reflected from the BPM. Additionally, a spin-polarized current is influenced by the BPM and a spin angular momentum sensor detects changes in spin angular momentum of the current. Further, a processor relates at least one property of the reflected waveform and/or current with positions of patterned bits on the BPM. The processor may then modify a timing signal and/or transducer head position to ensure that data bits are accurately written to the BPM. The end result is the ability to more quickly and accurately detect the patterned bits and synchronize a position of the transducer head with the patterned bits.

公开(公告)号：US20110102930A1

公开(公告)日：2011-05-05

申请号：US12613391

申请日：2009-11-05

申请人： Alan Biggar Johnston ,  Dieter Klaus Weller ,  Mark Anthony Gubbins

发明人： Alan Biggar Johnston ,  Dieter Klaus Weller ,  Mark Anthony Gubbins

IPC分类号： G11B5/02

CPC分类号： G11B5/59616 ,  B82Y10/00 ,  G11B5/09 ,  G11B5/743 ,  G11B2005/001

摘要： The presently disclosed technology teaches a transducer head with a read sensor, a write pole, and one or more waveform sensors attached to the transducer head. Further, a waveform propagates in the direction of a BPM and the waveform sensor is configured to detect the waveform after it is reflected from the BPM. Additionally, a spin-polarized current is influenced by the BPM and a spin angular momentum sensor detects changes in spin angular momentum of the current. Further, a processor relates at least one property of the reflected waveform and/or current with positions of patterned bits on the BPM. The processor may then modify a timing signal and/or transducer head position to ensure that data bits are accurately written to the BPM. The end result is the ability to more quickly and accurately detect the patterned bits and synchronize a position of the transducer head with the patterned bits.

摘要翻译： 目前公开的技术教导了具有读取传感器，写入极和连接到换能器头的一个或多个波形传感器的换能器头。 此外，波形沿BPM的方向传播，并且波形传感器被配置为在从BPM反射之后检测波形。 此外，自旋极化电流受BPM影响，自旋角动量传感器检测电流的自旋角动量的变化。 此外，处理器将反射波形和/或电流的至少一个性质与BPM上的图案化位的位置相关联。 然后，处理器可以修改定时信号和/或换能器头位置，以确保将数据位准确地写入BPM。 最终的结果是能够更快速和准确地检测图案化的位并使换能器头部与图案化位的同步。

公开(公告)号：US06222702B1

公开(公告)日：2001-04-24

申请号：US09134780

申请日：1998-08-13

申请人： Declan Macken ,  Alan Biggar Johnston ,  Gregory Stephen Mowry ,  Charles Henry Tolman

发明人： Declan Macken ,  Alan Biggar Johnston ,  Gregory Stephen Mowry ,  Charles Henry Tolman

IPC分类号： G11B511

CPC分类号： G11B5/11 ,  G11B5/3113 ,  G11B5/3912

摘要： A shield for a read element of a magnetic recording head is disclosed. The shield includes a first and a second triangular shaped closure magnetic domains positioned approximate a top surface of the shield such that a first surface of each of the first and second magnetic domains are formed by a portion of a first side of the shield and a second side of the shield, respectively. The shield also includes a third and a fourth triangular shaped closure magnetic domains positioned approximate the bottom surface of the shield. A first surface of the third and fourth magnetic domains are formed by a portion of the first side and the second side of the shield, respectively. A first magnetic domain wall is positioned between the first and second triangular shaped closure magnetic domains, while a second magnetic domain wall is positioned between the third and fourth triangular shaped closure magnetic domains.

摘要翻译： 公开了一种用于磁记录头的读取元件的屏蔽。 屏蔽包括第一和第二三角形闭合磁畴，其近似于屏蔽的顶表面，使得第一和第二磁畴中的每一个的第一表面由屏蔽的第一侧的一部分形成，而第二 侧面的盾牌。 屏蔽还包括接近屏蔽底面的第三和第四三角形封闭磁畴。 第三和第四磁畴的第一表面分别由屏蔽的第一侧和第二侧的一部分形成。 第一磁畴壁位于第一和第二三角形封闭磁畴之间，而第二磁畴壁位于第三和第四三角形闭合磁畴之间。