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1. 发明授权

US06795280B1 Tunneling magneto-resistive read head with two-piece free layer 有权
标题翻译：隧道式磁阻读取头，具有两片自由层
公开(公告)号：US06795280B1
公开(公告)日：2004-09-21
申请号：US09441901
申请日：1999-11-17
申请人： Dian Song , Nurul Amin , Sining Mao
发明人： Dian Song , Nurul Amin , Sining Mao
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3906 , G11B2005/3996
摘要： A method and apparatus for a recording head using a spin-dependent tunneling (SDT) junction. The SDT junction utilizes an aluminum oxide tunnel barrier. The tunnel barrier can be formed to a thickness comparable with a typical Cu spacer layer on a spin valve. With the SDT junction, current is applied perpendicular to the plane of the film. The SDT junctions can have high magneto-resistance up to 40%. The magnetoresistive qualities of a head design incorporating the SDT junction are not directly related to head resistance, head geometry, bias current and film thickness. The method can include forming a spin tunnel barrier by fashioning a stack into a bottom electrode, defining a junction, depositing a layer of insulator, performing a photoprocess, depositing an upper electrode layer and lifting off the top electrode layer to define the electrode. The stack can include a pinned layer, a barrier layer and a free layer. The pinned layer can include NiFe. The barrier layer can include AlOx. The free layer can include Co. The junction can be defined with an ion mill and the insulator can include Al2O3. In addition, the top electrode layer can include Cu.
摘要翻译：一种使用自旋相关隧道（SDT）结的记录头的方法和装置。 SDT连接处使用氧化铝隧道屏障。隧道势垒可以形成为与自旋阀上的典型Cu间隔层相当的厚度。使用SDT结，电流垂直于膜的平面施加。 SDT结可以具有高达40％的高磁阻。结合SDT结的头部设计的磁阻性质与磁头电阻，磁头几何形状，偏置电流和膜厚度无直接关系。该方法可以包括通过将堆叠形成底部电极形成自旋隧道势垒，限定结，沉积绝缘体层，执行光电处理，沉积上部电极层和提起顶部电极层以限定电极。堆叠可以包括钉扎层，阻挡层和自由层。钉扎层可以包括NiFe。阻挡层可以包括AlOx。自由层可以包括公司。接合点可以用离子磨机定义，绝缘体可以包括Al2O3。此外，顶部电极层可以包括Cu。

2. 发明授权

US06724584B2 Data head and method using a single antiferromagnetic material to pin multiple magnetic layers with differing orientation 有权
标题翻译：数据头和方法使用单个反铁磁材料来引导具有不同取向的多个磁性层
公开(公告)号：US06724584B2
公开(公告)日：2004-04-20
申请号：US10152192
申请日：2002-05-20
申请人： Anthony M. Mack , Zheng Gao , Nurul Amin , Sining Mao , Richard Michel
发明人： Anthony M. Mack , Zheng Gao , Nurul Amin , Sining Mao , Richard Michel
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , B82Y40/00 , G01R33/093 , G11B5/3113 , G11B5/3163 , G11B5/3903 , H01F10/3272 , H01F10/3295 , H01F41/304 , Y10T29/49034
摘要： Methods of fabricating spin valve sensors in accordance with the invention include forming a pinning layer from an antiferromagnetic material and forming a synthetic antiferromagnet adjacent the pinning layer. A free ferromagnetic layer is formed, and exchange tabs are formed adjacent outer portions of the free ferromagnetic layer for biasing the free layer. The exchange tabs are formed from the same antiferromagnetic material as the first pinning layer. Then, the magnetic moments of the synthetic antiferromagnet are set, and the magnetic moment of the free ferromagnetic layer is biased, during a single anneal in the presence of a single magnetic field.
摘要翻译：制造根据本发明的自旋阀传感器的方法包括从反铁磁材料形成钉扎层并在钉扎层附近形成合成的反铁磁体。形成自由铁磁层，并且在自由铁磁层的外部附近形成交换突片以偏置自由层。交换翼片由与第一钉扎层相同的反铁磁材料形成。然后，在存在单个磁场的单次退火期间，设定合成反铁磁体的磁矩，并且自由铁磁层的磁矩被偏置。

3. 发明授权

US06256176B1 Highly sensitive spin valve heads using a self-aligned demag-field balance element 失效
标题翻译：高灵敏度的自旋阀头采用自对准的场均衡元件
公开(公告)号：US06256176B1
公开(公告)日：2001-07-03
申请号：US09355784
申请日：1999-07-27
申请人： Sining Mao , Nurul Amin , Edward S. Murdock
发明人： Sining Mao , Nurul Amin , Edward S. Murdock
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3935 , G11B5/3938 , G11B2005/3996
摘要： A magnetic read head (30) for use in a magnetic data storage and retrieval system has a first current contact (40), a second current contact (42), a magnetoresistive read sensor (34), and a demagnetization field balance element (50). Positioned between the first and second current contacts (40, 42) are both the magnetoresistive read sensor (34) and the demagnetization field balance element (50). The demagnetization field balance element (50) is both electrically isolated from and magnetically coupled to the magnetoresistive read sensor (34).
摘要翻译：用于磁数据存储和检索系统的磁读头（30）具有第一电流触点（40），第二电流触点（42），磁阻读取传感器（34）和去磁场平衡元件（50））。位于第一和第二电流触头（40,42）之间的是磁阻读取传感器（34）和去磁场平衡元件（50）。去磁场平衡元件（50）与磁阻读取传感器（34）电隔离并磁耦合到磁阻读取传感器（34）。

4. 发明申请

US20100021767A1 DISCRETE TRACK MEDIA 有权
标题翻译：分离轨道介质
公开(公告)号：US20100021767A1
公开(公告)日：2010-01-28
申请号：US12178443
申请日：2008-07-23
申请人： Nurul Amin , Sining Mao
发明人： Nurul Amin , Sining Mao
IPC分类号： G11B5/66 , B05D5/12 , B26D3/00
CPC分类号： G11B5/84 , B26D3/16 , B82Y10/00 , G11B5/64 , G11B5/66 , G11B5/743 , G11B5/82 , G11B5/851 , G11B5/865 , Y10T83/04
摘要： A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.
摘要翻译：一种制造离散轨道磁记录介质的方法。提供基层，沉积重复和交替的磁性层和非磁性层。磁性层的厚度对应于记录介质的轨道的宽度。可以使用圆柱形棒作为基层，使得交替的磁性和非磁性层围绕杆螺旋或同心层。所得到的介质层可以被切割或切成单独的磁性介质，或用于用介质层的离散图案印刷其它介质盘。

5. 发明授权

US07016160B2 Differential CPP reader for perpendicular magnetic recording 有权
标题翻译：用于垂直磁记录的差分CPP读码器
公开(公告)号：US07016160B2
公开(公告)日：2006-03-21
申请号：US10715695
申请日：2003-11-18
申请人： Sining Mao , Eric S. Linville , Nurul Amin , Johannes Van Ek , Olle G. Heinonen
发明人： Sining Mao , Eric S. Linville , Nurul Amin , Johannes Van Ek , Olle G. Heinonen
IPC分类号： G11B5/127
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3948 , G11B2005/0008 , G11B2005/0029 , G11B2005/3996
摘要： A differential read head comprises one tri-layer reader or a plurality of tri-layer readers operating in a current perpendicular to plane (CPP) mode. The tri-layer readers each comprise a first free layer, a second free layer, and a nonmagnetic layer positioned therebetween. A nonmagnetic spacer is positioned between the plurality of tri-layer readers for electrically connecting the plurality of tri-layer readers in series such that a single CPP sense current representing a differential signal flows serially through the read head. With a single tri-layer reader, the free layers are spaced by a width substantially similar to the transition width of the magnetic medium.
摘要翻译：差分读取头包括在垂直于平面（CPP）模式的电流中操作的一个三层读取器或多个三层读取器。三层读取器各自包括位于其间的第一自由层，第二自由层和非磁性层。非磁性间隔件位于多个三层读取器之间，用于串联电连接多个三层读取器，使得表示差分信号的单个CPP感测电流串行地流过读取头。使用单个三层读取器，自由层间隔开与磁介质的过渡宽度基本相似的宽度。

6. 发明授权

US06469878B1 Data head and method using a single antiferromagnetic material to pin multiple magnetic layers with differing orientation 有权
公开(公告)号：US06469878B1
公开(公告)日：2002-10-22
申请号：US09500778
申请日：2000-02-08
申请人： Anthony M. Mack , Zheng Gao , Nurul Amin , Sining Mao , Richard Michel
发明人： Anthony M. Mack , Zheng Gao , Nurul Amin , Sining Mao , Richard Michel
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , B82Y40/00 , G01R33/093 , G11B5/3113 , G11B5/3163 , G11B5/3903 , H01F10/3272 , H01F10/3295 , H01F41/304 , Y10T29/49034
摘要： Methods of fabricating spin valve sensors in accordance with the invention include forming a pinning layer from an antiferromagnetic material and forming a synthetic antiferromagnet adjacent the pinning layer. A free ferromagnetic layer is formed, and exchange tabs are formed adjacent outer portions of the free ferromagnetic layer for biasing the free layer. The exchange tabs are formed from the same antiferromagnetic material as the first pinning layer. Then, the magnetic moments of the synthetic antiferromagnet are set, and the magnetic moment of the free ferromagnetic layer is biased, during a single anneal in the presence of a single magnetic field.

7. 发明授权

US08298611B2 Discrete track media 有权
标题翻译：离散轨道媒体
公开(公告)号：US08298611B2
公开(公告)日：2012-10-30
申请号：US12178443
申请日：2008-07-23
申请人： Nurul Amin , Sining Mao
发明人： Nurul Amin , Sining Mao
IPC分类号： G11B5/00
CPC分类号： G11B5/84 , B26D3/16 , B82Y10/00 , G11B5/64 , G11B5/66 , G11B5/743 , G11B5/82 , G11B5/851 , G11B5/865 , Y10T83/04
摘要： A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.
摘要翻译：一种制造离散轨道磁记录介质的方法。提供基层，沉积重复和交替的磁性层和非磁性层。磁性层的厚度对应于记录介质的轨道的宽度。可以使用圆柱形棒作为基层，使得交替的磁性和非磁性层围绕杆螺旋或同心层。所得到的介质层可以被切割或切成单独的磁性介质，或用于用介质层的离散图案印刷其它介质盘。

8. 发明申请

US20050105219A1 Differential CPP reader for perpendicular magnetic recording 有权
标题翻译：用于垂直磁记录的差分CPP读码器
公开(公告)号：US20050105219A1
公开(公告)日：2005-05-19
申请号：US10715695
申请日：2003-11-18
申请人： Sining Mao , Eric Linville , Nurul Amin , Johannes Van Ek , Olle Heinonen
发明人： Sining Mao , Eric Linville , Nurul Amin , Johannes Van Ek , Olle Heinonen
IPC分类号： G11B5/00 , G11B5/127 , G11B5/33 , G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3948 , G11B2005/0008 , G11B2005/0029 , G11B2005/3996
摘要： A differential read head comprises one tri-layer reader or a plurality of tri-layer readers operating in a current perpendicular to plane (CPP) mode. The tri-layer readers each comprise a first free layer, a second free layer, and a nonmagnetic layer positioned therebetween. A nonmagnetic spacer means is positioned between the plurality of tri-layer readers for electrically connecting the plurality of tri-layer readers in series such that a single CPP sense current representing a differential signal flows serially through the read head. With a single tri-layer reader, the free layers are spaced by a width substantially similar to the transition width of the magnetic medium.
摘要翻译：差分读取头包括在垂直于平面（CPP）模式的电流中操作的一个三层读取器或多个三层读取器。三层读取器各自包括位于其间的第一自由层，第二自由层和非磁性层。非磁性间隔装置位于多个三层读取器之间，用于串联电连接多个三层读取器，使得表示差分信号的单个CPP感测电流串行流过读取头。使用单个三层读取器，自由层间隔开与磁介质的过渡宽度基本相似的宽度。

9. 发明授权

US06462919B1 Spin valve sensor with exchange tabs 失效
标题翻译：带交换接头的旋转阀传感器
公开(公告)号：US06462919B1
公开(公告)日：2002-10-08
申请号：US09442798
申请日：1999-11-18
申请人： Anthony M. Mack , Sining Mao , Michael A. Seigler , Nurul Amin , Taras G. Pokhil , Ananth Naman , Jin Li , Zheng Gao , Edward S. Murdock , Jumna P. Ramdular , Timothy Radke
发明人： Anthony M. Mack , Sining Mao , Michael A. Seigler , Nurul Amin , Taras G. Pokhil , Ananth Naman , Jin Li , Zheng Gao , Edward S. Murdock , Jumna P. Ramdular , Timothy Radke
IPC分类号： G11B5127
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/3116 , G11B5/3163 , G11B5/3903 , G11B5/3932
摘要： A spin valve sensor is disclosed that comprises a first layer of ferromagnetic material and a second layer of ferromagnetic material. A first layer of non-ferromagnetic material is positioned between the first and second layers of ferromagnetic material. A pinning layer is positioned adjacent to the first layer of ferromagnetic material such that the pinning layer is in contact with the first layer of ferromagnetic material. The spin valve includes synthetic antiferromagnetic bias means extending over passive end regions of the second layer of ferromagnetic material for producing a longitudinal bias in the passive end regions of a level sufficient to maintain the passive end regions in a single domain state. A method for forming a spin valve sensor with exchange tabs is also disclosed.
摘要翻译：公开了一种自旋阀传感器，其包括第一层铁磁材料层和第二层铁磁材料层。第一层非铁磁材料位于第一和第二层铁磁材料之间。钉扎层定位成与第一铁磁材料层相邻，使得钉扎层与第一层铁磁材料接触。自旋阀包括在第二铁磁材料层的无源端区域上延伸的合成反铁磁偏压装置，用于在被动端区域产生足以将被动端区域维持在单一畴状态的水平面上的纵向偏压。还公开了一种用于形成具有交换接头的自旋阀传感器的方法。

10. 发明申请

US20130017413A1 Discrete Track Media 审中-公开
标题翻译：离散轨道媒体
公开(公告)号：US20130017413A1
公开(公告)日：2013-01-17
申请号：US13620499
申请日：2012-09-14
申请人： Nurul Amin , Sining Mao
发明人： Nurul Amin , Sining Mao
IPC分类号： G11B5/673
CPC分类号： G11B5/84 , B26D3/16 , B82Y10/00 , G11B5/64 , G11B5/66 , G11B5/743 , G11B5/82 , G11B5/851 , G11B5/865 , Y10T83/04
摘要： A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.
摘要翻译：一种制造离散轨道磁记录介质的方法。提供基层，沉积重复和交替的磁性层和非磁性层。磁性层的厚度对应于记录介质的轨道的宽度。可以使用圆柱形棒作为基层，使得交替的磁性和非磁性层围绕杆螺旋或同心层。所得到的介质层可以被切割或切成单独的磁性介质，或用于用介质层的离散图案印刷其它介质盘。

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