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81. 发明授权

US5898548A Shielded magnetic tunnel junction magnetoresistive read head 失效
标题翻译：屏蔽磁隧道结磁阻读头
公开(公告)号：US5898548A
公开(公告)日：1999-04-27
申请号：US957787
申请日：1997-10-24
申请人： Frederick Hayes Dill , Robert Edward Fontana, Jr. , Stuart Stephen Papworth Parkin , Ching Hwa Tsang
发明人： Frederick Hayes Dill , Robert Edward Fontana, Jr. , Stuart Stephen Papworth Parkin , Ching Hwa Tsang
IPC分类号： G11B5/39 , G11B5/33 , H01F10/16 , H01F10/32 , H01L43/08
CPC分类号： G11B5/332 , G11B5/33 , G11B5/3909 , G11B5/3912
摘要： A magnetic tunnel junction (MTJ) magnetoresistive read head for a magnetic recording system has the MTJ device located between two spaced-apart magnetic shields. The magnetic shields, which allow the head to detect individual magnetic transitions from the magnetic recording medium without interference from neighboring transitions, also function as electrical leads for connection of the head to sense circuitry. Electrically conductive spacer layers are located at the top and bottom of the MTJ device and connect the MTJ device to the shields. The thickness of the spacer layers is selected to optimize the spacing between the shields, which is a parameter that controls the linear resolution of the data that can be read from the magnetic recording medium. To reduce the likelihood of electrical shorting between the shields if the shield-to-shield spacing is too small, each of the shields can have a pedestal region with the MTJ device located between the two pedestals, so that the shield-to-shield spacing outside the pedestal regions is greater than in the pedestal regions.
摘要翻译：用于磁记录系统的磁性隧道结（MTJ）磁阻读取头具有位于两个间隔开的磁屏蔽之间的MTJ器件。允许头部从磁记录介质检测各个磁转变而不受相邻转变的干扰的磁屏蔽也用作用于将头连接到感测电路的电引线。导电间隔层位于MTJ设备的顶部和底部，并将MTJ设备连接到屏蔽。选择间隔层的厚度以优化屏蔽之间的间隔，这是控制可从磁记录介质读取的数据的线性分辨率的参数。为了减少屏蔽间隔太小的屏蔽之间的电气短路的可能性，每个屏蔽件可以具有基座区域，MTJ装置位于两个基座之间，使得屏蔽与屏蔽间隔在基座区域外部大于基座区域。

82. 发明授权

US5811971A Magnetic sensor and magnetic field sensing method using said magnetic sensor based on impedance changes of a high frequency excited conductor 失效
标题翻译：基于高频激励导体的阻抗变化，使用所述磁传感器的磁传感器和磁场感测方法
公开(公告)号：US5811971A
公开(公告)日：1998-09-22
申请号：US593387
申请日：1996-01-29
申请人： Masakatsu Senda , Osamu Ishii , Yasuhiro Koshimoto , Tomoyuki Toshima
发明人： Masakatsu Senda , Osamu Ishii , Yasuhiro Koshimoto , Tomoyuki Toshima
IPC分类号： G01R33/02 , G01R33/06 , G11B5/33
CPC分类号： G01R33/02 , G01R33/06 , G11B5/33 , G11B5/332
摘要： In a magnetic field sensing method in accordance with the invention of the present application, a magnetic sensor comprising a conductor and at least one magnetic material provided on any of the surfaces of this conductor, is employed. This magnetic sensor is disposed in the vicinity of an external magnetic field which is to be sensed, and by means of supplying a high frequency current to this conductor, the impedance of the conductor changes in accordance with the external magnetic field, and based on this, the external magnetic field is sensed.
摘要翻译：在根据本申请的本发明的磁场感测方法中，使用包括导体和设置在该导体的任何表面上的至少一个磁性材料的磁传感器。该磁传感器设置在要感测的外部磁场附近，并且通过向该导体提供高频电流，导体的阻抗根据外部磁场而变化，并且基于该，感测到外部磁场。

83. 发明授权

US5365391A Magnetic reproducing head having a distributed-constant circuit type magnetic field detector 失效
标题翻译：具有分布常数电路型磁场检测器的磁性再现头
公开(公告)号：US5365391A
公开(公告)日：1994-11-15
申请号：US842924
申请日：1992-02-27
申请人： Yasunari Sugiyama , Kiyoshi Kagawa , Masatoshi Hayakawa , Hiroyuki Ohmori
发明人： Yasunari Sugiyama , Kiyoshi Kagawa , Masatoshi Hayakawa , Hiroyuki Ohmori
IPC分类号： G01R33/02 , G01R33/12 , G11B5/33 , G11B5/39 , H01P1/00 , H01P3/08 , H01P11/00 , G11B5/127
CPC分类号： G01R33/02 , G11B5/33
摘要： A distributed-constant circuit type magnetic field detector which includes a magnetic member whose permeability varies with changes in a magnetic field applied thereto disposed at a point where a magnetic field is produced in a distributed-constant circuit excited with an electromagnetic wave and a detector for detecting a change in electromagnetic field distribution in the distributed-constant circuit produced by a variation in permeability of the magnetic member upon application thereto of a magnetic field to be detected.
摘要翻译：一种分布常数电路式磁场检测器，包括磁性部件，该磁性部件的磁导率随施加于其上的磁场的变化而变化，所述磁场设置在由电磁波激发的分布常数电路中产生磁场的点处，检测在应用待检测的磁场时由磁性部件的磁导率的变化产生的分布常数电路中的电磁场分布的变化。

84. 发明授权

US5111352A Three-pole magnetic head with reduced flux leakage 失效
标题翻译：三极磁头漏磁通减少
公开(公告)号：US5111352A
公开(公告)日：1992-05-05
申请号：US369833
申请日：1989-06-22
申请人： Shyam C. Das , Michael L. Mallary
发明人： Shyam C. Das , Michael L. Mallary
IPC分类号： G11B5/127 , G11B5/245 , G11B5/31 , G11B5/33 , G11B5/37 , G11B5/39
CPC分类号： G11B5/3925 , G11B5/127 , G11B5/1278 , G11B5/245 , G11B5/312 , G11B5/3143 , G11B5/33 , G11B5/332 , G11B5/374 , G11B5/3903 , G11B5/3967
摘要： A magnetic recording head including a read pole disposed in a gap between a pair of write poles, and a sensor spaced away from the gap, the read pole adapted to conduct flux to the sensor, each write pole forming a respective cavity between itself and the read pole where the outside of at least one pole is tapered down toward the pole tip, the poles being closer together at their tips than they are near the sensor.
摘要翻译：一种磁记录头，包括设置在一对写磁极之间的间隙中的读极和与间隙隔开的传感器，读极适于将磁通量传导到传感器，每个写磁极在其与其之间形成相应的腔，读极，其中至少一个极的外部朝向磁极尖端向下逐渐变细，磁极在它们的尖端处比它们靠近传感器更靠近在一起。

85. 发明授权

US4782415A Differential twin track vertical read/write magnetic head structure 失效
标题翻译：差分双轨垂直读/写磁头结构
公开(公告)号：US4782415A
公开(公告)日：1988-11-01
申请号：US782660
申请日：1985-10-02
申请人： Albert W. Vinal
发明人： Albert W. Vinal
IPC分类号： G11B5/127 , G11B5/33 , G11B5/39 , G11B5/30
CPC分类号： G11B5/3903 , G11B5/1278 , G11B5/33
摘要： An improved twin track read/write head structure that is differential in its response, thereby eliminating common mode noise signals is described. It also has a low electrical offset, increased linearity and reduction or elimination of any bias fields interfering with the magnetic recording medium. The structure utilizes a dual coupled film magneto resistive sensor bridging the legs of two magnetically permeable coupling members so that the dual magnetic sensors are in a series magnetic circuit with the coupling members. The dual coupled film magnetic sensors are connected together in a center tapped arrangement and are oppositely magnetically biased. Opposing voltages changes occur when the pair are subjected to a magnetic flux field passing serially through them. This produces a differential output signal that rejects unwanted common mode noise of all types. In addition, during read back when the sensors are biased by a magnetic flux field into their sensitive range, the balanced differential structure of the head presents equal magneto motive forces at both ends of the sensor where they connect to the flux coupling legs. As a consequence, there is no net flux available at the other ends of the coupling legs and no flux is coupled to the media.
摘要翻译：描述了其响应差异的改进的双轨读/写头结构，从而消除共模噪声信号。它还具有低的电偏移，增加的线性度和减少或消除干扰磁记录介质的任何偏置场。该结构利用双耦合薄膜磁阻传感器桥接两个磁导耦合构件的腿，使得双磁传感器与联接构件成串联磁路。双耦合薄膜磁传感器以中心抽头布置连接在一起，并且相反地磁偏置。当该对受到串联通过它们的磁通场时，发生相反的电压变化。这产生差分输出信号，可以抑制所有类型的不需要的共模噪声。此外，在传感器被磁通场偏置到敏感范围内的读回时，磁头的平衡差动结构在传感器的两端具有相同的磁动力，它们连接到磁通耦合支腿。因此，在耦合腿的另一端没有可用的净通量，并且没有通量耦合到介质。

86. 发明授权

US4593332A Magnetic reproduction system utilizing magnetic body as capacitor 失效
标题翻译：利用磁体作为电容器的磁再生系统
公开(公告)号：US4593332A
公开(公告)日：1986-06-03
申请号：US485060
申请日：1983-04-14
申请人： Junichi Akiyama , Shu Chiba , Norikazu Sawazaki
发明人： Junichi Akiyama , Shu Chiba , Norikazu Sawazaki
IPC分类号： G01R33/02 , G11B5/02 , G11B5/33
CPC分类号： G11B5/33 , G01R33/02 , G11B5/02
摘要： A capacitance element includes as an interelectrode substance a magnetic body for detecting a magnetic field formed by a magnetic recording medium. A tuned circuit includes the capacitance element as a tuning element and receives a signal from a high-frequency oscillator. The magnetic characteristics of the magnetic body change with changes in the magnetic field formed by the magnetic recording medium. The high-frequency signal output from the tuned circuit changes with changes in the magnetic characteristics of the magnetic body. A detecting circuit detects the changes in the high-frequency signal output so as to reproduce signals recorded on the magnetic recording medium.
摘要翻译：电容元件包括用于检测由磁记录介质形成的磁场的磁体作为电极间物质。调谐电路包括作为调谐元件的电容元件并且接收来自高频振荡器的信号。磁体的磁特性随着磁记录介质形成的磁场的变化而变化。从调谐电路输出的高频信号随磁体的磁特性的变化而变化。检测电路检测高频信号输出的变化，以便再现记录在磁记录介质上的信号。

87. 发明授权

US4464691A Magnetic reproducing system 失效
标题翻译：磁再现系统
公开(公告)号：US4464691A
公开(公告)日：1984-08-07
申请号：US290325
申请日：1981-08-05
申请人： Norikazu Sawazaki , Shu Chiba
发明人： Norikazu Sawazaki , Shu Chiba
IPC分类号： G11B5/02 , G11B5/33 , G11B5/34 , G11B5/04
CPC分类号： G11B5/332 , G11B5/33
摘要： A magnetic head includes a magnetic body, at least the permeability or high frequency loss of which is changed with changes of the record magnetic field on a magnetic tape, and a coil. A high frequency signal is supplied to a tuned circuit, which includes the coil and a capacitor, and a signal corresponding to the record magnetic field is taken out through the detection of the changes of the voltage of the high frequency signal supplied to the tuned circuit.
摘要翻译：磁头包括磁体，至少磁导率或高频损失随着磁带上的记录磁场和线圈的变化而变化。将高频信号提供给包括线圈和电容器的调谐电路，并且通过检测提供给调谐电路的高频信号的电压的变化来取出与记录磁场相对应的信号。

88. 发明授权

US4374403A Magnetic recording and reproducing system 失效
标题翻译：磁记录和再现系统
公开(公告)号：US4374403A
公开(公告)日：1983-02-15
申请号：US162611
申请日：1980-06-24
申请人： Mitsuaki Oshima , Yutaka Neichi , Atsushi Iga , Ryoichi Wada
发明人： Mitsuaki Oshima , Yutaka Neichi , Atsushi Iga , Ryoichi Wada
IPC分类号： G11B5/02 , G11B5/127 , G11B5/33 , G11B5/12
CPC分类号： G11B5/33 , G11B5/02 , G11B5/1278
摘要： A magnetic recording and reproducing system having a magnetic switching device of the thin film type which is disposed in a magnetic head and composed of a layer which is made of a magnetic material having a low coercive force and a layer which is made of a magnetic material having a high coercive force both layers are premagnetized by a magnetizing means; the magnetic switching is effected in the magnetic switching device in response to a magnetic recorded signal located on a facing magnetic recording media so that the magnetic switching is detected as a pulse voltage by means of a detecting coil which is wound around the magnetic switching device, so as to thereby generate a reproduced output corresponding to the recorded signal.
摘要翻译：一种磁记录和再现系统，具有薄膜型的磁性开关装置，该磁性开关装置设置在磁头中并且由具有低矫顽力的磁性材料制成的层和由磁性材料制成的层具有高的矫顽力，两层都被磁化装置预磁化; 响应于位于面对的磁记录介质上的磁记录信号，在磁切换装置中进行磁切换，从而通过卷绕在磁开关装置上的检测线圈将磁切换检测为脉冲电压，从而产生对应于记录信号的再现输出。

89. 发明授权

US4001890A Double chip flying head 失效
标题翻译：双芯飞行头
公开(公告)号：US4001890A
公开(公告)日：1977-01-04
申请号：US495028
申请日：1974-08-05
申请人： Wolfgang W. O. G. Kayser
发明人： Wolfgang W. O. G. Kayser
IPC分类号： G11B5/33 , G11B5/39 , G11B5/48 , G11B5/28 , G11B5/12 , G11B5/20 , G11B5/30
CPC分类号： G11B5/3903 , G11B5/33 , G11B5/3967 , G11B5/488
摘要： A plurality of thin-film transducer chips are mounted on a flying head. The head is mounted adjacent a magnetic storage medium having a plurality of closely spaced tracks. Each of the transducer chips has a transducer adjacent a corresponding one of each of the tracks of the storage medium so that a plurality of transducers may be used for reading or writing on each of the tracks. A specially designed write transducer may be used to write on each track and another specially designed read transducer may be used to read from each track.

90. 发明授权

US3389230A Semiconductive magnetic transducer 失效
标题翻译：半导体磁换能器
公开(公告)号：US3389230A
公开(公告)日：1968-06-18
申请号：US60015467
申请日：1967-01-06
申请人： HUDSON MAGISTON CORP
发明人： HUDSON JR EDWARD C
IPC分类号： G11B5/00 , G11B5/187 , G11B5/33 , H01L29/82 , H04R23/00
CPC分类号： H04R23/006 , G11B5/00 , G11B5/187 , G11B5/33 , H01L29/82

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