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1.发明授权Magnetic recording disk drive with write driver to write head transmission line having non-uniform sections for optimal write current pulse overshoot 有权具有写驱动器的磁记录磁盘驱动器，其写头传输线具有不均匀的部分，用于最佳写入电流脉冲过冲公开(公告)号：US08189281B2
公开(公告)日：2012-05-29
申请号：US12641362
申请日：2009-12-18
CPC分类号： G11B5/02 , G11B5/484 , G11B5/4853 , G11B5/486 , G11B2005/0002
摘要： An interconnect between the write driver and the write head in a magnetic recording disk drive enables an inherent write current overshoot. The interconnect includes an integrated lead suspension (ILS) and a short flex cable that connects the write driver circuitry to the ILS. The interconnect is a two-segment transmission line, with the first segment connected to the write driver having multiple sub-segments or sections with non-uniform impedance levels. The section of the first segment that connects to the write driver is the short flex cable and has an impedance substantially higher than the source impedance ZWD of the write driver. The multiple sections of the first segment have non-uniform impedance values that have an effective impedance Z01-eff that substantially matches ZWD. The second segment of the transmission line has an effective impedance Z02-eff that is substantially less than Z01-eff. The write lines for the +W and −W signals are preferably interleaved on the transmission line sections.
摘要翻译： 磁记录盘驱动器中的写入驱动器和写入头之间的互连使得能够产生固有的写入电流过冲。 互连包括集成引线悬架（ILS）和将写入驱动器电路连接到ILS的短柔性电缆。 互连是双段传输线，其中第一段连接到具有不均匀阻抗水平的多个子段或部分的写驱动器。 连接到写驱动器的第一段的部分是短柔性电缆，并且具有显着高于写驱动器的源阻抗ZWD的阻抗。 第一段的多个部分具有不均匀的阻抗值，其具有基本上与ZWD匹配的有效阻抗Z01-eff。 传输线的第二段具有实质上小于Z01-eff的有效阻抗Z02-eff。 用于+ W和-W信号的写入线优选地在传输线部分上交错。
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2.发明申请MAGNETIC RECORDING DISK DRIVE WITH WRITE DRIVER TO WRITE HEAD TRANSMISSION LINE HAVING NON-UNIFORM SECTIONS FOR OPTIMAL WRITE CURRENT PULSE OVERSHOOT 有权具有写入驱动器的磁性记录盘驱动器具有非均匀部分的写入头部传输线，用于最佳写入电流脉冲过电压公开(公告)号：US20110149441A1
公开(公告)日：2011-06-23
申请号：US12641362
申请日：2009-12-18
IPC分类号： G11B21/16
CPC分类号： G11B5/02 , G11B5/484 , G11B5/4853 , G11B5/486 , G11B2005/0002
摘要： An interconnect between the write driver and the write head in a magnetic recording disk drive enables an inherent write current overshoot. The interconnect includes an integrated lead suspension (ILS) and a short flex cable that connects the write driver circuitry to the ILS. The interconnect is a two-segment transmission line, with the first segment connected to the write driver having multiple sub-segments or sections with non-uniform impedance levels. The section of the first segment that connects to the write driver is the short flex cable and has an impedance substantially higher than the source impedance ZWD of the write driver. The multiple sections of the first segment have non-uniform impedance values that have an effective impedance Z01-eff that substantially matches ZWD. The second segment of the transmission line has an effective impedance Z02-eff that is substantially less than Z01-eff. The write lines for the +W and −W signals are preferably interleaved on the transmission line sections.
摘要翻译： 磁记录盘驱动器中的写入驱动器和写入头之间的互连使得能够产生固有的写入电流过冲。 互连包括集成引线悬架（ILS）和将写入驱动器电路连接到ILS的短柔性电缆。 互连是双段传输线，其中第一段连接到具有不均匀阻抗水平的多个子段或部分的写驱动器。 连接到写驱动器的第一段的部分是短柔性电缆，并且具有显着高于写驱动器的源阻抗ZWD的阻抗。 第一段的多个部分具有不均匀的阻抗值，其具有基本上与ZWD匹配的有效阻抗Z01-eff。 传输线的第二段具有实质上小于Z01-eff的有效阻抗Z02-eff。 用于+ W和-W信号的写入线优选地在传输线部分上交错。
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3.发明授权Perpendicular magnetic recording write head with spin torque oscillator for fast switching of write pole magnetization 有权垂直磁记录写头具有自旋转矩振荡器，可快速切换写磁极磁化公开(公告)号：US08446690B2
公开(公告)日：2013-05-21
申请号：US12542677
申请日：2009-08-17
IPC分类号： G11B5/17
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B5/3146 , G11B2005/0005
摘要： A perpendicular magnetic recording write head that a write pole, an electrically conductive coil coupled to the write pole for generating magnetic flux in the write pole in the presence of electrical write current, and a spin torque oscillator (STO) that injects auxiliary magnetic flux to the write pole in a direction generally orthogonal to the write pole to facilitate magnetization switching of the write pole. The STO comprises a stack of layers including electrodes, a pinned ferromagnetic layer having a fixed, a free ferromagnetic layer having a magnetization free to rotate, and a nonmagnetic spacer layer between the pinned and free layers. The free layer may be oriented either substantially orthogonal to the write pole or substantially parallel to the write pole, in which latter embodiment a flux guide may be located between the free layer and the write pole for directing the auxiliary magnetic flux from the free layer to the write pole.
摘要翻译： 垂直磁记录写头具有写极，耦合到写极的导电线圈，用于在存在写写电流的情况下在写极中产生磁通;以及自旋扭矩振荡器（STO），其将辅助磁通量注入到 写磁极在与写磁极大致垂直的方向上，以方便写磁极的磁化切换。 STO包括一叠层，包括电极，具有固定磁化的钉扎铁磁层，具有自由旋转的磁化的自由铁磁层和在被钉扎层和自由层之间的非磁性间隔层。 自由层可以取向为大致正交于写极或基本上平行于写极，其中后一实施例中的磁通引导件可以位于自由层和写极之间，用于将辅助磁通从自由层引导到 写柱。
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4.发明申请PERPENDICULAR MAGNETIC RECORDING WRITE HEAD WITH SPIN TORQUE OSCILLATOR FOR FAST SWITCHING OF WRITE POLE MAGNETIZATION 有权具有旋转扭矩振荡器的磁性记录磁头，用于快速切换写入磁场公开(公告)号：US20110038080A1
公开(公告)日：2011-02-17
申请号：US12542677
申请日：2009-08-17
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B5/3146 , G11B2005/0005
摘要： A perpendicular magnetic recording write head that a write pole, an electrically conductive coil coupled to the write pole for generating magnetic flux in the write pole in the presence of electrical write current, and a spin torque oscillator (STO) that injects auxiliary magnetic flux to the write pole in a direction generally orthogonal to the write pole to facilitate magnetization switching of the write pole. The STO comprises a stack of layers including electrodes, a pinned ferromagnetic layer having a fixed, a free ferromagnetic layer having a magnetization free to rotate, and a nonmagnetic spacer layer between the pinned and free layers. The free layer may be oriented either substantially orthogonal to the write pole or substantially parallel to the write pole, in which latter embodiment a flux guide may be located between the free layer and the write pole for directing the auxiliary magnetic flux from the free layer to the write pole.
摘要翻译： 垂直磁记录写头具有写极，耦合到写极的导电线圈，用于在存在写写电流的情况下在写极中产生磁通;以及自旋扭矩振荡器（STO），其将辅助磁通量注入到 写磁极在与写磁极大致垂直的方向上，以方便写磁极的磁化切换。 STO包括一叠层，包括电极，具有固定磁化的钉扎铁磁层，具有自由旋转的磁化的自由铁磁层和在被钉扎层和自由层之间的非磁性间隔层。 自由层可以取向为大致正交于写极或基本上平行于写极，其中后一实施例中的磁通引导件可以位于自由层和写极之间，用于将辅助磁通从自由层引导到 写柱。
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5.发明授权Perpendicular magnetic recording system with helical write coil and auxiliary coil for fast switching of write pole magnetization 有权具有螺旋写入线圈和辅助线圈的垂直磁记录系统，用于快速切换写磁极磁化公开(公告)号：US08116031B2
公开(公告)日：2012-02-14
申请号：US12419278
申请日：2009-04-06
IPC分类号： G11B5/17
CPC分类号： G11B5/3123 , G11B5/1278 , G11B2005/001
摘要： A perpendicular magnetic recording system has a write head having a main helical coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The auxiliary coil is preferably a helical coil wrapped around the auxiliary pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.
摘要翻译： 垂直磁记录系统具有写磁头，该写头具有主磁螺旋线圈（写线圈）和主磁极（写磁极），其在与磁记录介质中的记录层垂直的方向上引导写磁通，辅助线圈和 辅助极以与写极的主轴或垂直轴成一定角度注入磁极。 辅助线圈优选为缠绕在辅助极上的螺旋线圈。 来自辅助极的不平行于写入磁极的一次磁化的附加磁通对写入磁极的磁化施加相对较大的转矩，从而促进写入极的磁化反转。 电路连接到主线圈和辅助线圈，以与写入极的磁化转换同时产生辅助通量。
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6.发明申请PERPENDICULAR MAGNETIC RECORDING SYSTEM WITH HELICAL WRITE COIL AND AUXILIARY COIL FOR FAST SWITCHING OF WRITE POLE MAGNETIZATION 有权具有螺旋线圈和辅助线圈的永磁磁记录系统，用于快速切换写入磁场公开(公告)号：US20100254041A1
公开(公告)日：2010-10-07
申请号：US12419278
申请日：2009-04-06
IPC分类号： G11B5/17
CPC分类号： G11B5/3123 , G11B5/1278 , G11B2005/001
摘要： A perpendicular magnetic recording system has a write head having a main helical coil (the write coil) and main pole (the write pole) that directs write flux in a direction perpendicular to the recording layer in the magnetic recording medium, and an auxiliary coil and auxiliary pole that injects magnetic flux into the write pole at an angle to the primary or perpendicular axis of the write pole. The auxiliary coil is preferably a helical coil wrapped around the auxiliary pole. The additional flux from the auxiliary pole, which is injected non-parallel to the primary magnetization of the write pole, exerts a relatively large torque on the magnetization of the write pole, thereby facilitating magnetization reversal of the write pole. Electrical circuitry is connected to the main coil and the auxiliary coil to generate the auxiliary flux simultaneous with the switching of the magnetization of the write pole.
摘要翻译： 垂直磁记录系统具有写磁头，该写头具有主磁螺旋线圈（写线圈）和主磁极（写磁极），其在与磁记录介质中的记录层垂直的方向上引导写磁通，辅助线圈和 辅助极以与写极的主轴或垂直轴成一定角度注入磁极。 辅助线圈优选为缠绕在辅助极上的螺旋线圈。 来自辅助极的不平行于写入磁极的一次磁化的附加磁通对写入磁极的磁化施加相对较大的转矩，从而促进写入极的磁化反转。 电路连接到主线圈和辅助线圈，以与写入极的磁化转换同时产生辅助通量。
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公开(公告)号：US08116021B2
公开(公告)日：2012-02-14
申请号：US12629437
申请日：2009-12-02
申请人： Michael Alex , Xiaodong Che , Zhen Jin , Michael Paul Salo
发明人： Michael Alex , Xiaodong Che , Zhen Jin , Michael Paul Salo
IPC分类号： G11B27/36
CPC分类号： G11B19/041 , G11B5/02 , G11B20/10009 , G11B20/10398 , G11B2005/001 , G11B2020/10898 , G11B2220/2516
摘要： A hard disk drive (HDD) including a magnetic disk, the magnetic disk including a data track. The HDD also includes a synchronized rewrite controller for synchronizing a plurality of rewrites of a data pattern on a location of the track of the magnetic disk and the HDD includes a write head controlled by the synchronized rewrite controller for writing the data pattern on the location of the data track and rewriting the data pattern a plurality of times on the location in synchronization with a prior writing of the data pattern on the data track.
摘要翻译： 包括磁盘的硬盘驱动器（HDD），磁盘包括数据磁道。 HDD还包括同步重写控制器，用于在磁盘的轨道的位置上同步数据模式的多个重写，并且HDD包括由同步重写控制器控制的写入头，用于将数据模式写入到 数据跟踪数据跟踪并重写数据模式多次在位置上与数据轨迹上的数据模式的先前写入同步。
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8.发明授权Energy assisted magnetic recording medium capable of suppressing high DC readback noise 有权能量辅助磁记录介质能够抑制高回波的高噪声公开(公告)号：US08743666B1
公开(公告)日：2014-06-03
申请号：US13042840
申请日：2011-03-08
IPC分类号： G11B11/00
CPC分类号： G11B5/64 , G11B5/00 , G11B5/66 , G11B5/82 , G11B20/10481 , G11B2005/0021
摘要： A perpendicular magnetic recording (PMR) disk used in energy assisted magnetic recording drives is described. The PMR disk includes a substrate, a magnetic recording layer disposed above the substrate, an exchange coupling layer disposed above the magnetic recording layer, and a capping layer disposed above the exchange coupling layer. The capping layer has a Curie temperature greater than the Curie temperature of the magnetic recording layer.
摘要翻译： 描述了用于能量辅助磁记录驱动器的垂直磁记录（PMR）盘。 PMR盘包括衬底，设置在衬底上的磁记录层，设置在磁记录层上方的交换耦合层和设置在交换耦合层上方的覆盖层。 封盖层的居里温度大于磁记录层的居里温度。
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9.发明授权
公开(公告)号：US5616218A
公开(公告)日：1997-04-01
申请号：US304561
申请日：1994-09-12
申请人： Michael Alex
发明人： Michael Alex
CPC分类号： C23C14/34 , G11B5/7325 , G11B5/8404 , G11B5/851
摘要： A method for selectively choosing the magnetic properties of a sputter deposited recording layer of a magnetic recording medium comprises sputtering a target of metal underlayer material onto a substrate to deposit an underlayer film and selectively collimating the sputtered underlayer particles to vary the arrival energy and angular distribution of the sputter particles striking the substrate to selectively establish the orientation of the crystals making up the underlayer film. A magnetic metal film is then sputter deposited upon the underlayer film to form a magnetic recording layer, the magnetic metal film having a crystal texture and recording properties affected by the orientation of the crystals in the underlayer film. The magnetic properties of the magnetic recording layer are chosen by selectively collimating while sputter depositing the underlayer material. In an alternative embodiment of the present invention, both the underlayer film and the magnetic metal recording film are selectively collimated when deposited upon the substrate. A still further embodiment of the invention includes selectively collimating only the magnetic metal recording film.
摘要翻译： 用于选择性地选择磁记录介质的溅射沉积记录层的磁特性的方法包括将金属底层材料的靶溅射到衬底上以沉积下层膜并选择性地准直溅射的底层颗粒以改变到达能量和角分布 的溅射颗粒撞击衬底以选择性地建立构成下层膜的晶体的取向。 然后将磁性金属膜溅射沉积在下层膜上以形成磁记录层，该磁性金属膜具有受下层膜中的晶体取向影响的晶体结构和记录性能。 通过选择性地准直来选择磁记录层的磁特性，同时溅射沉积底层材料。 在本发明的替代实施例中，当沉积在基板上时，下层膜和磁性金属记录膜都被选择性地准直。 本发明的另一个实施例包括仅选择性地准直磁性金属记录膜。
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公开(公告)号：US20110128646A1
公开(公告)日：2011-06-02
申请号：US12629437
申请日：2009-12-02
申请人： Michael Alex , Xiaodong Che , Zhen Jin , Michael Paul Salo
发明人： Michael Alex , Xiaodong Che , Zhen Jin , Michael Paul Salo
IPC分类号： G11B21/02
CPC分类号： G11B19/041 , G11B5/02 , G11B20/10009 , G11B20/10398 , G11B2005/001 , G11B2020/10898 , G11B2220/2516
摘要： A hard disk drive (HDD) including a magnetic disk, the magnetic disk including a data track. The HDD also includes a synchronized rewrite controller for synchronizing a plurality of rewrites of a data pattern on a location of the track of the magnetic disk and the HDD includes a write head controlled by the synchronized rewrite controller for writing the data pattern on the location of the data track and rewriting the data pattern a plurality of times on the location in synchronization with a prior writing of the data pattern on the data track.
摘要翻译： 包括磁盘的硬盘驱动器（HDD），磁盘包括数据磁道。 HDD还包括同步重写控制器，用于在磁盘的轨道的位置上同步数据模式的多个重写，并且HDD包括由同步重写控制器控制的写入头，用于将数据模式写入到 数据跟踪数据跟踪并重写数据模式多次在位置上与数据轨迹上的数据模式的先前写入同步。
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