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81. 发明授权

US08760819B1 Magnetic recording sensor with sputtered antiferromagnetic coupling trilayer between plated ferromagnetic shields 有权
标题翻译：磁性记录传感器与电镀铁磁屏蔽之间的溅射反铁磁耦合三层
公开(公告)号：US08760819B1
公开(公告)日：2014-06-24
申请号：US12978145
申请日：2010-12-23
申请人： Feng Liu , Dehua Han , Ming Sun , Yimin Guo
发明人： Feng Liu , Dehua Han , Ming Sun , Yimin Guo
IPC分类号： G11B5/11 , G11B5/33
CPC分类号： G11B5/3912
摘要： A magnetic recording sensor for use in a data storage device is described. The sensor has a magnetoresistive sensing element and magnetic shields shielding the magnetoresistive sensing element. The magnetic shields include a first plated soft ferromagnetic layer, a second plated soft ferromagnetic layer, and an antiferromagnetic coupling (AFC) trilayer between the first plated soft ferromagnetic layer and the second plated soft ferromagnetic layer. The AFC trilayer includes a first AFC layer of sputtered ferromagnetic material; a second AFC layer of a nonmagnetic antiferromagnetic exchange material, and a third AFC layer of sputtered ferromagnetic material. Shields with AFC trilayers in bottom, side, and/or top shields, and well as between shields are provided. A method of fabricating is also provided.
摘要翻译：描述了用于数据存储装置的磁记录传感器。传感器具有磁阻感测元件和屏蔽磁阻感测元件的磁屏蔽。磁屏蔽包括第一镀层软铁磁层，第二电镀软铁磁层和第一镀层软铁磁层与第二电镀软铁磁层之间的反铁磁耦合（AFC）三层。 AFC三层包括溅射铁磁材料的第一AFC层; 非磁性反铁磁交换材料的第二AFC层和溅射的铁磁材料的第三AFC层。提供了在底部，侧面和/或顶部屏蔽以及屏蔽之间的AFC三层玻璃的屏蔽。还提供了一种制造方法。

82. 发明授权

US08194366B1 TMR read head structures with differential stripe heights 有权
标题翻译： TMR读取具有差分条纹高度的头结构
公开(公告)号：US08194366B1
公开(公告)日：2012-06-05
申请号：US12579315
申请日：2009-10-14
申请人： Shaoping Li , Yimin Guo , Feng Liu , Wei Zhang , Sining Mao
发明人： Shaoping Li , Yimin Guo , Feng Liu , Wei Zhang , Sining Mao
IPC分类号： G11B5/33
CPC分类号： G11B5/398 , G01R33/098 , G11B5/3909 , H01L43/08 , H01L43/12
摘要： A tunneling magnetoresistance (TMR) read head and a method of producing the same are disclosed. A free layer having a free layer stripe height is provided, the free layer having a first side and a second side. A tunneling barrier layer is formed adjacent to the first side of the free layer, the tunneling barrier layer having a first side and a second side, the second side of the tunneling barrier layer facing the first side of the free layer. A pinned stack is formed adjacent to the first side of the tunneling barrier layer. The pinned stack comprises at least one magnetic layer having a current path stripe height that is less than the free layer stripe height.
摘要翻译：公开了一种隧道磁阻（TMR）读头及其制造方法。提供具有自由层条纹高度的自由层，自由层具有第一侧和第二侧。隧道势垒层邻近自由层的第一侧形成，隧道势垒层具有第一侧和第二侧，隧道势垒层的第二面面向自由层的第一侧。在隧道势垒层的第一侧附近形成钉扎层。钉扎堆叠包括至少一个具有小于自由层条纹高度的电流路径条纹高度的磁性层。

83. 发明授权

US07750620B2 MTJ sensor based method to measure an electric current 有权
标题翻译：基于MTJ传感器的测量电流的方法
公开(公告)号：US07750620B2
公开(公告)日：2010-07-06
申请号：US12321841
申请日：2009-01-26
申请人： Yimin Guo , Po-Kang Wang
发明人： Yimin Guo , Po-Kang Wang
IPC分类号： G01R15/18 , G01R11/00
CPC分类号： G01R33/093 , B82Y25/00 , B82Y40/00 , G01R15/205 , G01R33/098 , G11B5/3932 , H01F10/3254 , H01F10/3277 , H01F41/302
摘要： By subdividing the free layer of a GMR/TMR device into multiple sub-elements that share common top and bottom electrodes, a magnetic detector is produced that is domain stable in the presence of large stray fields, thereby eliminating the need for longitudinal bias magnets. Said detector may be used to measure electric currents without being affected by local temperature fluctuations and/or stray fields.
摘要翻译：通过将GMR / TMR器件的自由层细分成共享共同的顶部和底部电极的多个子元件，产生在大的杂散场存在下稳定的磁性检测器，从而不需要纵向偏置磁体。所述检测器可用于测量电流而不受局部温度波动和/或杂散场的影响。

84. 发明授权

US07619407B2 Gear tooth sensor with single magnetoresistive bridge 有权
标题翻译：带单磁阻桥的齿轮传感器
公开(公告)号：US07619407B2
公开(公告)日：2009-11-17
申请号：US12082257
申请日：2008-04-10
申请人： Yimin Guo , Grace Gorman
发明人： Yimin Guo , Grace Gorman
IPC分类号： G01B7/30 , G01R33/09
CPC分类号： G01B7/30 , G01D5/147 , G01P3/488
摘要： The invention discloses a rotation sensor suitable for gear wheels. MR (magneto-resistive) sensors are placed inside a zero field region generated by at least two permanent magnets. The sensors are divided into two groups that are immersed in different locally generated magnetic environments. A differential signal taken between the two groups then senses the movement of the wheel's teeth. A single wafer method for manufacturing the device is also briefly described.
摘要翻译：本发明公开了一种适用于齿轮的旋转传感器。 MR（磁阻）传感器被放置在由至少两个永磁体产生的零场区域内。传感器被分为浸没在不同的本地产生的磁环境中的两组。在两组之间拍摄的差分信号然后感测到车轮的齿的运动。还简要描述了用于制造该器件的单晶片方法。

85. 发明申请

US20090256552A1 GEAR TOOTH SENSOR WITH SINGLE MAGNETORESISTIVE BRIDGE 有权
标题翻译：具有单磁铁桥的齿轮传感器
公开(公告)号：US20090256552A1
公开(公告)日：2009-10-15
申请号：US12082257
申请日：2008-04-10
申请人： Yimin Guo , Grace Gorman
发明人： Yimin Guo , Grace Gorman
IPC分类号： G01B7/30
CPC分类号： G01B7/30 , G01D5/147 , G01P3/488
摘要： The invention discloses a rotation sensor suitable for gear wheels. MR (magneto-resistive) sensors are placed inside a zero field region generated by at least two permanent magnets. Said sensors are divided into two groups that are immersed in different locally generated magnetic environments. A differential signal taken between the two groups then senses the movement of the wheel's teeth. A single wafer method for manufacturing the device is also briefly described.
摘要翻译：本发明公开了一种适用于齿轮的旋转传感器。 MR（磁阻）传感器被放置在由至少两个永磁体产生的零场区域内。所述传感器被分成浸没在不同的局部产生的磁环境中的两组。在两组之间拍摄的差分信号然后感测到车轮的齿的运动。还简要描述了用于制造该器件的单晶片方法。

86. 发明授权

US07592803B1 Highly sensitive AMR bridge for gear tooth sensor 有权
标题翻译：用于齿轮传感器的高灵敏度AMR桥
公开(公告)号：US07592803B1
公开(公告)日：2009-09-22
申请号：US12214865
申请日：2008-06-23
申请人： Yimin Guo , Grace Gorman
发明人： Yimin Guo , Grace Gorman
IPC分类号： G01B7/30 , G01R33/05 , G01R33/09
CPC分类号： G01R33/093 , B82Y25/00 , G01R33/096
摘要： An AMR gear tooth rotation sensor and a method for utilizing it are disclosed. These facilitate easy manufacture of the device without sacrificing either high sensitivity or high signal output. This is achieved by forming individual sensing elements out of AMR stripes and then connecting four such sensing elements as a Wheatstone bridge. The latter is attached to a permanent magnet that provides a bias field whose value rises and falls as wheel teeth and valleys (respectively) move past the rotation sensor.
摘要翻译：公开了一种AMR齿轮齿旋转传感器及其利用方法。这些便于制造设备而不牺牲高灵敏度或高信号输出。这可以通过将AMR条纹中的各个感测元件形成，然后连接四个这样的传感元件如惠斯通电桥来实现。后者附着在永磁体上，该永磁体提供偏置场，其值随着轮齿和谷（分别）移动经过旋转传感器而上升和下降。

87. 发明申请

US20090115405A1 Magnetic field angular sensor with a full angle detection 审中-公开
标题翻译：具有全角度检测功能的磁场角度传感器
公开(公告)号：US20090115405A1
公开(公告)日：2009-05-07
申请号：US11982188
申请日：2007-11-01
申请人： Yimin Guo , Grace Gorman
发明人： Yimin Guo , Grace Gorman
IPC分类号： G01B7/30 , B05D5/12
CPC分类号： G01D5/145
摘要： An integrated angular magnetic sensor apparatus for determining a magnetic field angle within two axes of a plane is formed on a substrate onto which two anisotropic magneto-resistive sensing elements and at least one magneto-resistive sensing element are fabricated. The two anisotropic magneto-resistive sensing elements are oriented such that the output voltages of a first and second of the anisotropic magneto-resistive sensing elements are a function of a first and second trigonometric function (a sine function) of the magnetic field angle to a reference axis. The at least one magneto-resistive sensing element on the substrate and having a fixed reference magnetization oriented with respect to the reference axis such that an output voltage of the at least one magneto-resistive sensing element provides a quadrant indicator for the magnetic field angle with respect to the reference axis. The quadrant indicator is a trigonometric function such as a sine or cosine function.
摘要翻译：在其上制造两个各向异性磁阻感测元件和至少一个磁阻感测元件的基板上形成用于确定平面的两个轴内的磁场角的集成角度磁传感器装置。两个各向异性磁阻感测元件被定向成使得第一和第二个各向异性磁阻感测元件的输出电压是与第一和第二个各向异性磁阻感测元件的磁场角的第一和第二三角函数（正弦函数）的函数参考轴。所述至少一个磁阻感测元件在所述衬底上并且具有相对于所述参考轴线定向的固定参考磁化，使得所述至少一个磁阻感测元件的输出电压提供用于磁场角的象限指示符，相对于参考轴。象限指示器是一个三角函数，如正弦或余弦函数。

88. 发明申请

US20080205131A1 Magnetic random access memory with selective toggle memory cells 失效
标题翻译：具有选择性触发存储单元的磁性随机存取存储器
公开(公告)号：US20080205131A1
公开(公告)日：2008-08-28
申请号：US12151217
申请日：2008-05-05
申请人： Yimin Guo
发明人： Yimin Guo
IPC分类号： G11C11/15 , H01L21/00
CPC分类号： G11C11/16 , B82Y25/00 , H01F10/3254 , H01F10/3272 , H01F10/3295
摘要： A toggle MTJ is disclosed that has a SAF free layer with two or more magnetic sub-layers having equal magnetic moments but different anisotropies which is achieved by selecting Ni˜0.8Fe˜0.2 for one sub-layer and CoFeB or the like with a uni-axial anisotropy of 10 to 30 Oe for the higher anisotropy sub-layer. When a field is applied at
摘要翻译：公开了一种切换MTJ，其具有具有两个或更多个具有相同磁矩但具有不同各向异性的两个或更多个磁性子层的SAF自由层，其通过选择Ni-0.8No 0.2〜对于较高的各向异性子层，具有10〜30Oe的单轴各向异性的一个子层和CoFeB等。当从容易轴以<10°角施加场时，两个子层的磁矢量与容易轴旋转以形成不同的角度。还描述了一种用于选择性地写入沿着与位线段正交的字线的位的方法，并且避免了“首先读取”的需要。在没有位线脉冲的情况下，施加具有由无脉冲间隔分开的两个相反脉冲的双极字线脉冲，以写入“0”。与第二字线脉冲相反的位线脉冲写入“1”。

89. 发明授权

US07394247B1 Magnetic field angle sensor with GMR or MTJ elements 有权
标题翻译：具有GMR或MTJ元件的磁场角传感器
公开(公告)号：US07394247B1
公开(公告)日：2008-07-01
申请号：US11881349
申请日：2007-07-26
申请人： Yimin Guo , Grace Gorman , Po-Kang Wang
发明人： Yimin Guo , Grace Gorman , Po-Kang Wang
IPC分类号： G01R33/09 , G01B7/30
CPC分类号： G01R33/093 , B82Y25/00 , G01D5/145 , G01R33/098
摘要： The invention discloses a sensor for 360-degree magnetic field angle measurement. It comprises multiple GMR (or MTJ) stripes with identical geometries except for their orientations. These are used as the building blocks for a pair of Wheatstone bridges that signal the direction of magnetization of their environment. The design greatly enhances sensitivity within GMR stripes and does not require an additional Hall sensor in order to cover the full 360 degree measurement range.
摘要翻译：本发明公开了一种用于360度磁场角测量的传感器。它包括除了它们的取向之外具有相同几何形状的多个GMR（或MTJ）条纹。这些被用作一对惠斯通电桥的结构，它们表示了它们的环境的磁化方向。该设计极大地提高了GMR条纹下的灵敏度，并且不需要额外的霍尔传感器来覆盖整个360度的测量范围。

90. 发明申请

US20080062585A1 Method to achieve both narrow track width and effective longitudinal stabilization in a CPP GMR read head 失效
标题翻译：在CPP GMR读头中实现窄轨宽度和有效纵向稳定的方法
公开(公告)号：US20080062585A1
公开(公告)日：2008-03-13
申请号：US11880585
申请日：2007-07-23
申请人： Yimin Guo , Li-Yan Zhu
发明人： Yimin Guo , Li-Yan Zhu
IPC分类号： G11B5/133 , G11B5/127
CPC分类号： G11B5/39 , Y10T29/49043 , Y10T29/49044 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： Biasing schemes used for CIP GMR devices were previously thought to be impractical for CPP devices due to current shunting by the abutted hard magnets. In the present invention the CPP stripe is a narrow conductor directly above the free layer. The resistivity of the latter is made to be relatively high so the sensing current diverges very little as it passes through it. This makes it possible to use abutted hard magnets for longitudinal bias with virtually no loss of sensing current due to shunting by the magnets.
摘要翻译： CIP GMR器件的偏移方案以前被认为是由CPP器件由于邻接的硬磁体的电流分流而不切实际的。在本发明中，CPP条纹是直接位于自由层上方的窄导体。后者的电阻率相对较高，因此当感测电流通过时，感应电流发散很小。这使得可以使用邻接的硬磁体用于纵向偏置，由于磁体的分流，几乎不会损失感测电流。

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