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1.发明授权Magnetic recording head having narrow write gap, and disk device provided with the same 有权具有窄写入间隙的磁记录头，以及具有该间隙的磁盘装置公开(公告)号：US09142228B2
公开(公告)日：2015-09-22
申请号：US14174711
申请日：2014-02-06
CPC分类号： G11B5/23 , G11B5/1278 , G11B5/3116 , G11B5/3146 , G11B2005/0024
摘要： A recording head of a disk device includes a main magnetic pole, a write shield which faces the main magnetic pole with a write gap interposed therebetween, a coil configured to generate a magnetic field in the main magnetic pole, and a spin torque oscillator which is arranged in the write gap. The spin torque oscillator includes an intermediate layer formed on the main magnetic pole, a field generation layer formed on the intermediate layer, a spin injection layer, and an interface magnetic layer. The field generation layer and the spin injection layer are arranged in parallel to each other in the direction which intersects with the gap length direction of the write gap, and the spin injection layer is electrically connected with the write shield.
摘要翻译： 磁盘装置的记录头包括主磁极，面对主磁极的写屏蔽，其中插入有写入间隙，被配置为在主磁极中产生磁场的线圈，以及自旋扭矩振荡器，其是 排列在写入间隙。 自旋扭矩振荡器包括形成在主磁极上的中间层，形成在中间层上的场产生层，自旋注入层和界面磁性层。 场产生层和自旋注入层在与写入间隙的间隙长度方向相交的方向上彼此平行地布置，并且自旋注入层与写入屏蔽电连接。
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公开(公告)号：US08953273B1
公开(公告)日：2015-02-10
申请号：US14482085
申请日：2014-09-10
发明人： Tomomi Funayama
IPC分类号： G11B5/02
CPC分类号： G11B5/1278 , G11B5/012 , G11B2005/0024
摘要： According to one embodiment, a magnetic disk apparatus includes a main magnetic pole configured to apply a recording magnetic field to a recording medium, a recording coil configured to magnetize the main magnetic pole, a spin-torque oscillator adjacent to the main magnetic pole, and configured to generate a high frequency magnetic field, a recording current control circuit configured to supply a recording current to the recording coil, a driving current control circuit configured to supply a fixed driving current to the spin-torque oscillator, and an overshoot control circuit configured to control overshoot current of the recording current in proportion to the magnitude of the driving current after the recording current has reversed.
摘要翻译： 根据一个实施例，磁盘装置包括被配置为向记录介质施加记录磁场的主磁极，被配置为磁化主磁极的记录线圈，与主磁极相邻的自旋扭矩振荡器，以及 被配置为产生高频磁场;记录电流控制电路，被配置为向所述记录线圈提供记录电流;驱动电流控制电路，被配置为向所述自旋转矩振荡器提供固定的驱动电流;以及过冲控制电路， 以在记录电流反转之后与驱动电流的大小成比例地控制记录电流的过冲电流。
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公开(公告)号：US20170263272A1
公开(公告)日：2017-09-14
申请号：US15257029
申请日：2016-09-06
发明人： Tomomi Funayama
CPC分类号： G11B5/3909 , G11B5/09 , G11B5/17 , G11B20/10018
摘要： According to one embodiment, a magnetic disk device includes a magnetic recording medium, a head including a recording magnetic pole, a spin torque oscillator provided near the recording magnetic pole, and a coil which excites the recording magnetic pole, a first current supply which supplies the coil with a first current corresponding to write data, a detector which detects a first signal corresponding to the write data, and outputs a second signal in accordance with the first signal, and a second power supply which varies, in accordance with the second signal, a second current supplied to the spin torque oscillator.
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公开(公告)号：US09747932B1
公开(公告)日：2017-08-29
申请号：US15267438
申请日：2016-09-16
发明人： Tomoko Taguchi , Tomomi Funayama
CPC分类号： G11B5/3909 , G11B5/1278 , G11B5/17 , G11B5/235 , G11B5/3146 , G11B5/6082 , G11B2005/0024
摘要： According to one embodiment, a magnetic recording head includes an air bearing surface, a magnetic core including a main magnetic pole and a write shield arranged to face the main magnetic pole with a write gap, a coil, and a high-frequency oscillator provided between the main magnetic pole and the write shield in the write gap. The magnetic core includes an opposite surface facing a film surface of the high-frequency oscillator, a magnetic layer, and a nonmagnetic layer in which magnetic microparticles are dispersed. The nonmagnetic layer is provided outside the magnetic layer in at least a part of the opposite surface of the magnetic core.
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公开(公告)号：US09653103B2
公开(公告)日：2017-05-16
申请号：US14869087
申请日：2015-09-29
发明人： Yuuzo Kamiguchi , Hitoshi Iwasaki , Masayuki Takagishi , Tomomi Funayama , Kenichiro Yamada , Satoshi Shirotori , Susumu Hashimoto
CPC分类号： G11B5/4853 , G11B5/02 , G11B5/11 , G11B5/3903 , G11B5/3906 , G11B5/398
摘要： A magnetic head according to an embodiment includes: a spin valve element with three terminals including a nonmagnetic base layer, a first terminal including a first magnetic layer, a second terminal including a second magnetic layer, and a third terminal including a third magnetic layer; and a slider including a first external lead terminal connecting to the first terminal, a second external lead terminal connecting to the second terminal, and a third external lead terminal connecting to the third terminal, in an operation, a first current being caused to flow from the second external lead terminal to the third terminal via the second terminal and the nonmagnetic base layer, and a second current that is lower than the first current being caused to flow to the first terminal.
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公开(公告)号：US09047887B2
公开(公告)日：2015-06-02
申请号：US14022411
申请日：2013-09-10
发明人： Tomomi Funayama
CPC分类号： G11B5/23 , G11B5/1278 , G11B5/235 , G11B5/3143 , G11B2005/0024
摘要： According to one embodiment, a magnetic recording head includes a main pole, a write shield facing the main pole with a write gap interposed therebetween, a recording coil, and a high-frequency oscillator including an oscillation layer provided within the write gap between an end portion of the main pole and the write shield, and an intermediate layer and a spin-injection layer stacked on the oscillation layer. The oscillation layer, the intermediate layer and the spin-injection layer are stacked in a direction intersecting the gap length direction of the write gap, and at least one of the oscillation layer and the spin-injection layer is electrically connected to one of the main pole and the write shield.
摘要翻译： 根据一个实施例，磁记录头包括主极，面对主极的写入屏蔽，其中插入有写入间隙，记录线圈和高频振荡器，其包括设置在写入间隙内的振荡层， 主磁极和写屏蔽的部分，以及堆叠在振荡层上的中间层和自旋注入层。 振荡层，中间层和自旋注入层在与写入间隙的间隙长度方向交叉的方向上堆叠，并且振荡层和自旋注入层中的至少一个电连接到主体 极和写屏蔽。
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公开(公告)号：US20170249960A1
公开(公告)日：2017-08-31
申请号：US15267438
申请日：2016-09-16
发明人： Tomoko Taguchi , Tomomi Funayama
CPC分类号： G11B5/3909 , G11B5/1278 , G11B5/17 , G11B5/235 , G11B5/3146 , G11B5/6082 , G11B2005/0024
摘要： According to one embodiment, a magnetic recording head includes an air bearing surface, a magnetic core including a main magnetic pole and a write shield arranged to face the main magnetic pole with a write gap, a coil, and a high-frequency oscillator provided between the main magnetic pole and the write shield in the write gap. The magnetic core includes an opposite surface facing a film surface of the high-frequency oscillator, a magnetic layer, and a nonmagnetic layer in which magnetic microparticles are dispersed. The nonmagnetic layer is provided outside the magnetic layer in at least a part of the opposite surface of the magnetic core.
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公开(公告)号：US20170047084A1
公开(公告)日：2017-02-16
申请号：US14928868
申请日：2015-10-30
发明人： Tomomi Funayama , Akihiko Takeo
CPC分类号： G11B5/112 , G11B5/3146 , G11B5/315 , G11B5/3166 , G11B5/3169 , G11B5/3173 , G11B2005/0024
摘要： According to one embodiment, a method of manufacturing a magnetic recording head includes forming a microwave oscillator to cover a main pole and a side shield and also to cross at least a part of a side gap between the main pole and the side shield, and lapping the main pole, the side shield and the microwave oscillator in a height direction while monitoring an electric resistance between the main pole and the side shield.
摘要翻译： 根据一个实施例，制造磁记录头的方法包括形成微波振荡器以覆盖主极和侧屏蔽，并且还跨越主极和侧屏蔽之间的侧间隙的至少一部分，并且研磨 主极，侧屏蔽和微波振荡器，同时监测主极和侧屏蔽之间的电阻。
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9.发明授权公开(公告)号：US09171558B2
公开(公告)日：2015-10-27
申请号：US14152974
申请日：2014-01-10
CPC分类号： G11B5/3163 , G11B5/29 , G11B5/3909 , G11B5/3912 , G11B5/3932 , G11B5/3958 , G11B5/4886 , G11B5/4976
摘要： A magnetic head includes a plurality of reproducing elements so that the magnetic head can acquire reproduction signals from a plurality of tracks at the same time. The magnetic head includes a first reproducing element, a first magnetic film formed on a first side wall of the first reproducing element with a first side wall insulating film interposed therebetween, a second magnetic film formed on a second side wall of the first reproducing element with a second side wall insulating film interposed therebetween, a second reproducing element electrically isolated from the first reproducing element and formed on the first magnetic film, a third magnetic film formed on the first magnetic film, and a fourth magnetic film formed on the first reproducing element and electrically isolated from the second reproducing element.
摘要翻译： 磁头包括多个再现元件，使得磁头可以同时从多个轨道获取再现信号。 磁头包括第一再现元件，形成在第一再现元件的第一侧壁上的第一磁性膜，其间插入有第一侧壁绝缘膜，形成在第一再现元件的第二侧壁上的第二磁性膜， 介于其间的第二侧壁绝缘膜，与第一再现元件电隔离并形成在第一磁性膜上的第二再现元件，形成在第一磁性膜上的第三磁性膜和形成在第一再现元件上的第四磁性膜 并且与第二再现元件电隔离。
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10.发明授权Magnetic recording head with spin torque oscillator having inverted current supply circuit 有权具有自旋转矩振荡器的磁记录头具有反相电流供应电路公开(公告)号：US09019660B2
公开(公告)日：2015-04-28
申请号：US13828222
申请日：2013-03-14
发明人： Tomomi Funayama
CPC分类号： G11B5/1278 , G11B5/314 , G11B2005/0024
摘要： According to one embodiment, a magnetic recording head includes a main magnetic pole configured to apply a recording magnetic field to a recording layer of a recording medium, a spin torque oscillator adjacent to the main magnetic pole in a vicinity of a disk-facing surface confronting the recording medium, a recording coil configured to excite the main magnetic pole, a recording current control circuit configured to supply a recording current to the recording coil, a constant current supply circuit configured to supply a constant current to the spin torque oscillator, and an inverted current supply circuit configured to supply an inverted current having a polarity different from the constant current to the spin torque oscillator.
摘要翻译： 根据一个实施例，磁记录头包括主磁极，该主磁极被配置为向记录介质的记录层施加记录磁场;邻近主磁极的旋转扭矩振荡器 记录介质，被配置为激励主磁极的记录线圈，被配置为向记录线圈提供记录电流的记录电流控制电路，被配置为向旋转扭矩振荡器提供恒定电流的恒流供应电路， 反相电流供给电路，被配置为向旋转扭矩振荡器提供具有与恒定电流不同的极性的反相电流。
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