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101. 发明授权

US09324342B2 Dual reader structure 有权
标题翻译：双读卡器结构
公开(公告)号：US09324342B2
公开(公告)日：2016-04-26
申请号：US14839489
申请日：2015-08-28
申请人： Seagate Technology LLC
发明人： Victor Boris Sapozhnikov , Harry Edelman , Mohammed Sharia Ullah Patwari
IPC分类号： G11B5/39 , G11B5/115 , G11B5/48
CPC分类号： G11B5/3948 , G11B5/115 , G11B5/3909 , G11B5/3912 , G11B5/3951 , G11B5/3954 , G11B5/398 , G11B5/4886 , G11B2005/3996
摘要： Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack separated by a top mid-shield and a bottom mid-shield, and a pre-amplifier circuit comprising a top lead connected to the top mid-shield, configured to collect current flowing from the top mid-shield through the top sensor stack opposite a direction of current flowing from the bottom mid-shield to a bottom lead through the bottom sensor stack.
摘要翻译：本文描述和要求保护的实施例提供了具有底部传感器堆叠和由顶部中间屏蔽和底部中间屏蔽隔开的顶部传感器堆叠的堆叠双重读取器，以及包括顶部引线的前置放大器电路，屏蔽件，被配置为收集从顶部中间屏蔽件流过顶部传感器堆叠的电流，该电流与从底部中间屏蔽件流过底部传感器堆叠的底部引线的电流方向相反。

102. 发明授权

US09251810B2 Methods and systems for utilizing sensor resistance for detecting damage to magnetoresistive sensors 有权
标题翻译：利用传感器电阻检测磁阻传感器损坏的方法和系统
公开(公告)号：US09251810B2
公开(公告)日：2016-02-02
申请号：US13331902
申请日：2011-12-20
申请人： Icko E. Tim Iben
发明人： Icko E. Tim Iben
IPC分类号： G01R35/00 , G11B5/008 , G11B5/455 , G11B5/39
CPC分类号： G11B5/455 , G11B5/00826 , G11B5/3948
摘要： Methods and systems for detecting a damaged magnetoresistive sensor are disclosed. In one embodiment, resistances of a plurality of sensors are measured at at least a first bias current level. Further, it is determined whether one of the sensors has a resistance that is at least a predetermined amount higher or lower than the resistances of the other sensors. Moreover, output indicates that the one of the sensors has a resistance that is at least a predetermined amount higher than the resistances of the other sensors.
摘要翻译：公开了用于检测损坏的磁阻传感器的方法和系统。在一个实施例中，在至少第一偏置电流电平上测量多个传感器的电阻。此外，确定传感器之一是否具有比其他传感器的电阻高至少至少预定量的电阻。此外，输出表示传感器中的一个具有比其他传感器的电阻高至少预定量的电阻。

103. 发明申请

US20150255092A1 Multi-Sensor Reader with Different Readback Sensitivities 有权
标题翻译：具有不同回读灵敏度的多传感器读取器
公开(公告)号：US20150255092A1
公开(公告)日：2015-09-10
申请号：US14201358
申请日：2014-03-07
申请人： Seagate Technology LLC
发明人： Declan Macken , Jason Gadbois , Eric W. Singleton , John M. Wolf
IPC分类号： G11B5/39
CPC分类号： G11B5/3951 , G11B5/3909 , G11B5/3912 , G11B5/3932 , G11B5/3948 , G11B5/3958 , G11B2005/3996
摘要： Apparatus for sensing data from a magnetic recording medium using a multi-sensor reader with different readback sensitivities. In accordance with some embodiments, a data transducing head has first and second read sensors. The first read sensor is optimized for reading data and the second read sensor is optimized to detect thermal asperity (TA) events.
摘要翻译：用于使用具有不同回读敏感度的多传感器读取器来感测来自磁记录介质的数据的装置。根据一些实施例，数据传感头具有第一和第二读取传感器。第一个读取传感器被优化用于读取数据，第二个读取传感器被优化以检测热不均匀性（TA）事件。

104. 发明授权

US09099156B2 Two-dimensional magnetic recording systems and methods for minimizing and accounting for inter-modulation of signals induced in adjacent read elements 有权
标题翻译：二维磁记录系统和用于最小化和计算在相邻读取元件中感应的信号的相互调制的方法
公开(公告)号：US09099156B2
公开(公告)日：2015-08-04
申请号：US14501255
申请日：2014-09-30
申请人： Marvell World Trade LTD.
发明人： Xiao Yu Miao , Sang Kong Chan , Ah Siah Chua , Thart Fah Voo
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B20/10314 , G11B5/09 , G11B5/3948 , G11B20/10027
摘要： A system including transmission lines, read elements, and differential amplifiers. The read elements are connected in series. Each of the read elements is connected to a respective pair of the transmission lines. The differential amplifiers are connected respectively to the read elements via the transmission lines. The differential amplifiers are configured to amplify differential signals received from the respective pairs of the transmission lines.
摘要翻译：包括传输线，读取元件和差分放大器的系统。读取元件串联连接。每个读取元件连接到相应的传输线对。差分放大器经由传输线分别连接到读取元件。差分放大器被配置为放大从各对传输线接收的差分信号。

105. 发明授权

US09099121B2 Current-perpendicular-to-plane magnetoresistive read sensor with grooved contact and free layers 有权
标题翻译：电流垂直于平面的磁阻读取传感器，带有沟槽接触和自由层
公开(公告)号：US09099121B2
公开(公告)日：2015-08-04
申请号：US14293199
申请日：2014-06-02
申请人： International Business Machines Corporation
发明人： Giovanni Cherubini , Simeon Furrer , Jens Jelitto , Mark A. Lantz
IPC分类号： G11B5/39
CPC分类号： G11B5/39 , G11B5/3909 , G11B5/3912 , G11B5/3929 , G11B5/3948 , G11B5/3958 , G11B2005/3996 , Y10T428/1114 , Y10T428/1121 , Y10T428/1129
摘要： A current-perpendicular-to-plane magnetoresistive read sensor includes a stack of layers extending along a stacking direction, and an edge surface parallel to the stacking direction that forms at least part of a bearing surface of the read sensor, the bearing surface designed to face a recording medium. The stack of layers includes a first contact layer, a ferromagnetic free layer whose magnetic orientation varies according to an applied magnetic field, above the first contact layer, a non-magnetic layer above the ferromagnetic layer, a ferromagnetic spin injection layer above the non-magnetic layer, and a second contact layer above the spin injection layer, such that a current can flow between the second contact layer and the first contact layer along a current-perpendicular-to-plane direction, parallel to the stacking direction. The stack of layers further includes a series of structures extending along a direction parallel to the bearing surface and perpendicular to the stacking direction.
摘要翻译：电流垂直于平面的磁阻读取传感器包括沿堆叠方向延伸的层叠层，以及平行于层叠方向的边缘表面，其形成读取传感器的支承表面的至少一部分，该轴承表面被设计为面对记录介质。层叠层包括第一接触层，铁磁自由层，其磁取向根据所施加的磁场而变化，在第一接触层上方，铁磁层上方的非磁性层，非磁性层上方的铁磁自旋注入层，磁性层和自旋注入层上方的第二接触层，使得电流可以沿平行于堆叠方向的电流垂直于平面的方向在第二接触层和第一接触层之间流动。层叠层还包括沿着平行于支承表面并垂直于层叠方向的方向延伸的一系列结构。

106. 发明申请

US20150108972A1 SENSOR DEVICE AND METHOD 有权
标题翻译：传感器装置和方法
公开(公告)号：US20150108972A1
公开(公告)日：2015-04-23
申请号：US14057214
申请日：2013-10-18
申请人： Infineon Technologies AG
发明人： Juergen Zimmer , Harald Witschnig
IPC分类号： G01R33/09 , H01L43/12
CPC分类号： G01R33/093 , G11B5/3903 , G11B5/3909 , G11B5/3948 , G11B5/3961 , H01L27/22 , H01L43/12
摘要： Embodiments relate to a sensor device including a layer stack 600, the layer stack 600 including at least ferromagnetic and non-magnetic layers formed on a common substrate 620. The sensor device 600 further includes at least a first magneto-resistive sensor element 711 provided by a first section 611 of the layer stack 600. The first magneto-resistive sensor element 711 herein is configured to generate a first signal. The sensor device 600 also includes a second magneto-resistive sensor element 712 provided by a second section 612 of the layer stack 610. The second magneto-resistive sensor element 712 herein is configured to generate a second signal for verifying the first signal.
摘要翻译：实施例涉及包括层堆叠600的传感器设备，层堆叠600至少包括形成在公共衬底620上的铁磁和非磁性层。传感器设备600还包括至少第一磁阻传感器元件711，其由层堆叠600的第一部分611.这里的第一磁阻传感器元件711被配置为产生第一信号。传感器装置600还包括由层堆610的第二部分612提供的第二磁阻传感器元件712.此处的第二磁阻传感器元件712被配置为产生用于验证第一信号的第二信号。

107. 发明授权

US08953284B1 Multi-read sensor having a narrow read gap structure 有权
标题翻译：具有窄读取间隙结构的多读传感器
公开(公告)号：US08953284B1
公开(公告)日：2015-02-10
申请号：US14085734
申请日：2013-11-20
申请人： HGST Netherlands B.V.
发明人： Hideki Mashima , Nobuo Yoshida , Masashi Hattori , Tutomu Yasuda
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/3948
摘要： In one embodiment, a magnetic head includes a lower shield layer positioned at a media-facing surface of the magnetic head, at least two magnetoresistive (MR) elements positioned above the lower shield layer, each MR element extending in an element height direction away from the media-facing surface of the magnetic head, back wiring layers positioned above at least one lower layer of each of the MR elements at a position away from the media-facing surface of the magnetic head in the element height direction, wherein the back wiring layers are configured to electrically communicate with the MR elements and configured to separately extract signals from each MR element during a read operation, and an upper shield layer positioned above the MR elements that is configured to electrically communicate with the MR elements.
摘要翻译：在一个实施例中，磁头包括位于磁头的面向介质表面的下屏蔽层，位于下屏蔽层上方的至少两个磁阻（MR）元件，每个MR元件沿元件高度方向延伸远离所述磁头的面向介质的表面，背面布线层位于远离所述磁头的与所述介质相对表面在元件高度方向上的位置的每个所述MR元件的至少一个下层之上，其中所述背面布线层被配置为与MR元件电通信并且被配置为在读取操作期间单独提取来自每个MR元件的信号，以及位于配置为与MR元件电连通的MR元件之上的上屏蔽层。

108. 发明授权

US08786970B2 Determining inter-track coherence using output signals from first and second tracks 有权
标题翻译：使用来自第一和第二轨道的输出信号来确定轨道间相干性
公开(公告)号：US08786970B2
公开(公告)日：2014-07-22
申请号：US13429795
申请日：2012-03-26
申请人： Mehmet Fatih Erden
发明人： Mehmet Fatih Erden
IPC分类号： G11B5/09
CPC分类号： G11B5/012 , G11B5/3948 , G11B5/3954 , G11B5/4886 , G11B5/746 , G11B20/10222 , G11B20/10268 , G11B2220/2516
摘要： An assembly and method to determine adjacent track coherence is disclosed. The assembly includes coherence circuitry configured to receive phase and frequency offsets from timing recovery circuitry and determine an inter-track phase and frequency coherence between the encoded data on a first track and the encoded data on a second track adjacent to the first track utilizing the frequency and phase offsets from the timing recovery circuitry for the output signals corresponding to the first and second tracks.
摘要翻译：公开了一种用于确定相邻轨迹相干性的装配和方法。组件包括相干电路，其被配置为从定时恢复电路接收相位和频率偏移，并且确定第一磁道上的编码数据与第一磁道相邻的第二磁道上的编码数据之间的轨道间相位和频率相干性，利用频率以及来自对应于第一和第二磁道的输出信号的定时恢复电路的相位偏移。

109. 发明申请

US20130250447A1 DETERMINING INTER-TRACK COHERENCE USING OUTPUT SIGNALS FROM FIRST AND SECOND TRACKS 有权
标题翻译：使用第一和第二轨迹的输出信号来确定帧间相干
公开(公告)号：US20130250447A1
公开(公告)日：2013-09-26
申请号：US13429795
申请日：2012-03-26
申请人： Mehmet Fatih Erden
发明人： Mehmet Fatih Erden
IPC分类号： G11B5/09
CPC分类号： G11B5/012 , G11B5/3948 , G11B5/3954 , G11B5/4886 , G11B5/746 , G11B20/10222 , G11B20/10268 , G11B2220/2516
摘要： An assembly and method to determine adjacent track coherence is disclosed. The assembly includes coherence circuitry configured to receive phase and frequency offsets from timing recovery circuitry and determine an inter-track phase and frequency coherence between the encoded data on a first track and the encoded data on a second track adjacent to the first track utilizing the frequency and phase offsets from the timing recovery circuitry for the output signals corresponding to the first and second tracks.
摘要翻译：公开了一种用于确定相邻轨迹相干性的装配和方法。组件包括相干电路，其被配置为从定时恢复电路接收相位和频率偏移，并且确定第一磁道上的编码数据与第一磁道相邻的第二磁道上的编码数据之间的轨道间相位和频率相干性，利用频率以及来自对应于第一和第二磁道的输出信号的定时恢复电路的相位偏移。

110. 发明申请

US20110276287A1 METHODS FOR DETECTING DAMAGE TO MAGNETORESISTIVE SENSORS 有权
标题翻译：检测磁传感器损坏的方法
公开(公告)号：US20110276287A1
公开(公告)日：2011-11-10
申请号：US13186341
申请日：2011-07-19
申请人： Icko E. Tim Iben , Darrell G. Follett , Guillermo Paniagua
发明人： Icko E. Tim Iben , Darrell G. Follett , Guillermo Paniagua
IPC分类号： G06F19/00
CPC分类号： G11B27/36 , G11B5/3948 , G11B5/40 , G11B2220/90
摘要： A system and method for detecting a damaged magnetoresistive sensor includes measuring a median DiffPN value of a group of GMR sensors on a module, the sensors characterized as having been deposited on a same wafer and having been lapped as a single unit; comparing the DiffPN values to the median; determining that physical and/or magnetic damage has occurred to an individual sensor if the difference in the DiffPN value of the individual sensor from the median is greater than a statistically predetermined value for the group of sensors; where the difference is at least one times the average of the standard deviations of a large number of normal modules or the average of the standard deviations of a large number of modules, wherein at least the largest and the smallest DiffPN value within the module is not included in the calculation of the module's standard deviation.
摘要翻译：用于检测损坏的磁阻传感器的系统和方法包括测量模块上的一组GMR传感器的中值DiffPN值，所述传感器被表征为已经沉积在相同的晶片上并且已被研磨为单个单元; 将DiffPN值与中位数进行比较; 如果单个传感器的DiffPN值与中值的差异大于传感器组的统计预定值，则确定个体传感器已经发生物理和/或磁损伤; 其中差异是大量正常模块的标准偏差的平均值的平均值或大量模块的标准偏差的平均值的至少一倍，其中模块中至少最大和最小的DiffPN值不是包含在模块标准偏差的计算中。

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