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11. 发明申请

WO2013169592A2 METHOD AND STRUCTURE FOR TESTING AND CALIBRATING THREE AXIS MAGNETIC FIELD SENSING DEVICES 审中-公开
标题翻译：用于测试和校准三轴磁场感应装置的方法和结构
公开(公告)号：WO2013169592A2
公开(公告)日：2013-11-14
申请号：PCT/US2013/039463
申请日：2013-05-03
申请人： LIU, Lianjun , MATHER, Phillip , EVERSPIN TECHNOLOGIES, INC.
发明人： LIU, Lianjun , MATHER, Phillip
IPC分类号： G01R35/00 , G01R33/09
CPC分类号： G01R33/09 , G01R33/0035 , G01R33/0206 , G01R33/093 , G01R35/00 , G01R35/005
摘要： A structure and method are provided for self-test of a Z axis sensor. Two self-test current lines are symmetrically positioned adjacent, but equidistant from, each sense element. The vertical component of the magnetic field created from a current in the self-test lines is additive in a flux guide positioned adjacent, and orthogonal to, the sense element; however, the components of the magnetic fields in the plane of the sense element created by each of the two self-test current line pairs cancel one another at the sense element center, resulting in only the Z axis magnetic field being sensed during the self-test.
摘要翻译：提供了一种用于Z轴传感器自检的结构和方法。两条自测电流线对称地定位在与每个感测元件相邻但等距离的位置。由自检线中的电流产生的磁场的垂直分量在与感测元件相邻且正交的位置处的磁通导向器中是相加的; 然而，由两个自检电流线对中的每一个产生的感测元件的平面中的磁场的分量在感测元件中心彼此抵消，导致在自适应期间仅感测到Z轴磁场，测试。

12. 发明申请

WO2011085153A1 METHOD AND STRUCTURE FOR TESTING AND CALIBRATING MAGNETIC FIELD SENSING DEVICE 审中-公开
标题翻译：用于测试和校准磁场感测装置的方法和结构
公开(公告)号：WO2011085153A1
公开(公告)日：2011-07-14
申请号：PCT/US2011/020451
申请日：2011-01-07
申请人： EVERSPIN TECHNOLOGIES, INC. , MATHER, Phillip
发明人： MATHER, Phillip
IPC分类号： G01B7/14 , G01R33/06 , H01L43/08
CPC分类号： G01R33/098 , G01R33/0035
摘要： A method of sensing a magnetic field including at least one magnetoresistive sensing element (100) in a circuit (101) includes supplying (702) a first plurality of currents to a stabilization line (116) disposed adjacent the magnetoresistive sensing element (100), applying (704) a second plurality of currents to a self test line (120) disposed adjacent the magnetic tunnel junction (100), one each of the first plurality of currents being supplied during one each of the second plurality of currents. Values sensed by the magnetic tunnel junction sensing element (100) in response to the supplying (702) of the first plurality of currents and the applying (704) of the second plurality of currents are sampled (706) and the sensitivity of the magnetic tunnel junction sensor (100) and electrical and magnetic offset are determined (708) from the sampled values. The temperature coefficient of offset may also be determined.
摘要翻译：一种感测包括电路（101）中的至少一个磁阻感测元件（100）的磁场的方法包括：将第一多个电流提供（702）到邻近磁阻感测元件（100）设置的稳定线（116）将第二多个电流施加（704）到邻近所述磁性隧道结（100）设置的自测试线（120），所述第一多个电流中的每一个在所述第二多个电流中的每一个期间被提供。由磁隧道结感测元件（100）响应于第一多个电流的供应（702）和第二多个电流的施加（704）而感测的值被采样（706），磁隧道的灵敏度结点传感器（100）以及电和磁偏移量从采样值确定（708）。也可以确定偏移的温度系数。

13. 发明申请

WO2009120894A3 IMPROVED MAGNETIC SENSOR DESIGN FOR SUPPRESSION OF BARKHAUSEN NOISE 审中-公开
公开(公告)号：WO2009120894A3
公开(公告)日：2009-10-01
申请号：PCT/US2009/038448
申请日：2009-03-26
申请人： MATHER, Phillip , CHUNG, Young, Sir , ENGEL, Bradley, N. , EVERSPIN TECHNOLOGIES, INC.
发明人： MATHER, Phillip , CHUNG, Young, Sir , ENGEL, Bradley, N.
IPC分类号： G01R33/09
摘要： A semiconductor process and apparatus provide a high-performance magnetic field sensor from two differential sensor configurations (201, 211) which require only two distinct pinning axes (206, 216), where each differential sensor (e.g., 201) is formed from a Wheatstone bridge structure with four unshielded MTJ sensors (202-205), each of which includes a magnetic field pulse generator (e.g., 414) for selectively applying a field pulse to stabilize or restore the easy axis magnetization of the sense layers (e.g., 411) to eliminate micromagnetic domain switches during measurements of small magnetic fields.

14. 发明申请

WO2012115924A2 APPARATUS AND METHOD FOR SEQUENTIALLY RESETTING ELEMENTS OF A MAGNETIC SENSOR ARRAY 审中-公开
标题翻译：用于顺序重置磁传感器阵列元件的装置和方法
公开(公告)号：WO2012115924A2
公开(公告)日：2012-08-30
申请号：PCT/US2012/025858
申请日：2012-02-21
申请人： EVERSPIN TECHNOLOGIES, INC. , ENGEL, Bradley , MATHER, Phillip
发明人： ENGEL, Bradley , MATHER, Phillip
IPC分类号： G01R33/02
CPC分类号： G01R33/098 , B82Y25/00 , G01R33/0023 , G01R33/09 , G01R33/093
摘要： A semiconductor process and apparatus provide a high-performance magnetic field sensor with three differential sensor configurations which require only two distinct pinning axes, where each differential sensor is formed from a Wheatstone bridge structure with four unshielded magnetic tunnel junction sensor arrays, each of which includes a magnetic field pulse generator for selectively applying a field pulse to stabilize or restore the easy axis magnetization of the sense layers to orient the magnetization in the correct configuration. prior to measurements of small magnetic fields. The field pulse is sequentially applied to groups of the sense layers of the Wheatstone bridge structures, thereby allowing for a higher current pulse or larger sensor array size for maximal signal to noise ratio.
摘要翻译：半导体工艺和设备提供具有三个差分传感器配置的高性能磁场传感器，其仅需要两个不同的钉扎轴，其中每个差分传感器由具有四个非屏蔽磁隧道结传感器阵列的惠斯登电桥结构形成，每个包括磁场脉冲发生器，用于选择性地施加场脉冲以稳定或恢复感测层的容易轴的磁化，以便以正确的构型定向磁化。在测量小磁场之前。场脉冲顺序地施加到惠斯登电桥结构的感测层的组，从而允许更高的电流脉冲或更大的传感器阵列尺寸以获得最大的信噪比。

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