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1. 发明授权

US10360939B2 Metal-insulator-metal near-field transducer for heat-assisted magnetic recording 有权
公开(公告)号：US10360939B2
公开(公告)日：2019-07-23
申请号：US15853768
申请日：2017-12-23
申请人： Western Digital Technologies, Inc. , The Provost, Fellows, Foundation Scholars and the other members of the Board, of the College of the Holy and Undivided Trinity of Queen Elizabeth Near Dublin
发明人： Alexander Krichevsky , Frank Bello , Christopher Wolf , Fenghua Zong , Daniel Wolf , David McCloskey , Kyle Ballantine , John Donegan
IPC分类号： G11B13/08 , G11B5/00
摘要： Disclosed herein are embodiments of a heat-assisted magnetic recording (HAMR) device comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide. The NFT comprises a core layer comprising an insulator, a first metal layer adjacent to the core layer, and a second layer adjacent to the first metal layer, wherein the second layer comprises a material that is substantially mechanically and thermally stable and thereby functions as a hard jacket to mitigate deformation of the NFT. The first metal layer may comprise a plasmonic metal, such as gold. The second layer may comprise tungsten, chromium, or a dielectric material.

2. 发明授权

US09064528B1 Interferometric waveguide usable in shingled heat assisted magnetic recording in the absence of a near-field transducer 有权
标题翻译：干涉波导可用于在不存在近场换能器的带状热辅助磁记录中
公开(公告)号：US09064528B1
公开(公告)日：2015-06-23
申请号：US13927996
申请日：2013-06-26
申请人： Western Digital Technologies, Inc.
发明人： Alexander Krichevsky , Christopher B. Wolf
IPC分类号： G11B11/00 , G11B11/105
CPC分类号： G11B11/10576 , G11B5/314 , G11B5/6088 , G11B11/10536 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) head is coupled with a laser for providing energy and has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The HAMR head includes a slider coupled with the laser and a HAMR transducer coupled with the slider. The HAMR transducer includes a write pole that writes to a region of the media, coil(s) for energizing the write pole and an interferometric waveguide (IWG) optically coupled with the laser. The IWG includes a splitter, a recombination region and arms between the splitter and the recombination region. The arms have multiple optical path lengths. The IWG is configured to provide the energy from the laser to the media by forming an interference pattern in the recombination region. An antinode of the interference pattern is at a region of the media and heats the region of the media for a write operation.
摘要翻译：热辅助磁记录（HAMR）头与用于提供能量的激光器耦合并且具有配置为在使用期间驻留在介质附近的空气轴承表面（ABS）。 HAMR头包括与激光器耦合的滑块和与滑块耦合的HAMR换能器。 HAMR传感器包括写入磁极的区域的写入极，用于激励写入极的线圈和与激光器光耦合的干涉波导（IWG）。 IWG包括分离器，复合区域和分离器与复合区域之间的臂。臂具有多个光路长度。 IWG被配置为通过在复合区域中形成干涉图案将激光器的能量提供给介质。干涉图案的波腹位于介质的区域，并加热介质的区域进行写入操作。

3. 发明授权

US08908480B1 Method and system for providing an energy assisted magnetic recording disk drive using a pulsed laser light 有权
标题翻译：使用脉冲激光提供能量辅助磁记录磁盘驱动器的方法和系统
公开(公告)号：US08908480B1
公开(公告)日：2014-12-09
申请号：US13631493
申请日：2012-09-28
申请人： Western Digital Technologies, Inc.
发明人： Alexander Krichevsky
IPC分类号： G11B5/02
CPC分类号： G11B5/02 , G11B5/105 , G11B5/6088 , G11B2005/0021
摘要： A method and system provide an energy assisted magnetic recording (EAMR) disk drive. The EAMR disk drive includes a media, at least one laser coupled with the slider, at least one EAMR head on the slider, and at least one electro-optical modulator (EAM) The EAM(s) are optically coupled with the laser(s) and coupled with the slider. The combination of the laser(s) and EAM(s) provide a pulsed energy output. The EAMR head(s) include at least one waveguide, a write pole, and at least one coil for energizing the write pole. The waveguide(s) receive the pulsed energy output and direct the pulsed energy output toward the media.
摘要翻译：一种方法和系统提供能量辅助磁记录（EAMR）磁盘驱动器。 EAMR磁盘驱动器包括介质，至少一个与滑动器耦合的激光器，滑块上的至少一个EAMR磁头和至少一个电光调制器（EAM）。EAM与激光器）并与滑块耦合。激光和EAM的组合提供脉冲能量输出。 EAMR头包括至少一个波导，写极和用于激励写极的至少一个线圈。波导接收脉冲能量输出并将脉冲能量输出引向介质。

4. 发明授权

US08891341B1 Energy assisted magnetic recording disk drive using modulated laser light 有权
标题翻译：使用调制激光的能量辅助磁记录磁盘驱动器
公开(公告)号：US08891341B1
公开(公告)日：2014-11-18
申请号：US13794166
申请日：2013-03-11
申请人： Western Digital Technologies, Inc.
发明人： Alexander Krichevsky , Michael L. Mallary , Fenghua Zong
IPC分类号： G11B11/00 , G11B13/04
CPC分类号： G11B5/02 , G11B2005/0021
摘要： A method and system provide a heat assisted magnetic recording (HAMR) disk drive including a media. The HAMR disk drive also includes a slider, at least one laser, at least one HAMR head on the slider and at least one electro-optical modulator (EOM) optically coupled with the laser(s) and coupled with the slider. The at least one laser and the at least one EOM are coupled to provide a modulated energy output. The at least one EOM controls the modulated energy output to have a characteristic waveform shape. The at least one HAMR head includes at least one waveguide, a write pole, and at least one coil for energizing the write pole. The at least one waveguide receives the modulated energy output and directs the modulated energy output toward the media.
摘要翻译：一种方法和系统提供包括介质的热辅助磁记录（HAMR）磁盘驱动器。所述HAMR磁盘驱动器还包括滑动器，至少一个激光器，所述滑块上的至少一个HAMR磁头和与所述激光器光学耦合并与所述滑块耦合的至少一个电光调制器（EOM）。所述至少一个激光器和所述至少一个EOM被耦合以提供调制的能量输出。至少一个EOM控制调制能量输出以具有特征波形形状。所述至少一个HAMR头包括至少一个波导，写极点和用于激励写入极点的至少一个线圈。所述至少一个波导接收调制的能量输出并将调制的能量输出引导到所述介质。

5. 发明授权

US10249336B1 Architecture for metal-insulator-metal near-field transducer for heat-assisted magnetic recording 有权
公开(公告)号：US10249336B1
公开(公告)日：2019-04-02
申请号：US15853770
申请日：2017-12-23
申请人： Western Digital Technologies, Inc. , The Provost, Fellows, Foundation Scholars and the other members of the Board, of the College of the Holy and Undivided Trinity of Queen Elizabeth Near Dublin
发明人： Alexander Krichevsky , Frank Bello , Christopher Wolf , Fenghua Zong , Daniel Wolf , David McCloskey , Kyle Ballantine , John Donegan
IPC分类号： G11B13/08 , G11B5/31 , G11B5/00
摘要： Disclosed herein are embodiments of a heat-assisted magnetic recording (HAMR) device comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide in a direct-fire configuration. The NFT comprises an insulator core encased in a metal portion. The insulator core comprises a rectangular portion and a tapered portion, wherein the rectangular portion is between the waveguide and the tapered portion. The metal portion comprises a plasmonic metal.

6. 发明授权

US09484051B1 Method and system for reducing undesirable reflections in a HAMR write apparatus 有权
标题翻译：用于减少HAMR写入装置中不期望的反射的方法和系统
公开(公告)号：US09484051B1
公开(公告)日：2016-11-01
申请号：US14936584
申请日：2015-11-09
申请人： Western Digital Technologies, Inc. , The Provost, Fellows, Foundation Scholars and the other members of Board, of the College of the Holy and Undivided Trinity of Queen Elizabeth near Dublin
发明人： Alexander Krichevsky , Christopher B. Wolf , Frank D. Bello , Kyle E. Ballantine , John Donegan , David Michael Owen McCloskey
IPC分类号： G11B5/60 , G11B5/48 , G11B5/00 , G11B5/02
CPC分类号： G11B5/6088 , G11B5/02 , G11B5/3133 , G11B5/314 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) write apparatus is coupled with a laser that provides energy. The HAMR write apparatus includes a pole, at least one coil, a waveguide, a near-field transducer (NFT) and at least one antireflective mechanism. The pole writes to a region of the media and includes a media-facing surface. The coil(s) energize the pole. The waveguide is optically coupled with the laser and includes a core and cladding. The waveguide is for directing a portion of the energy toward the NFT, which is located in a transmission direction from the core of the waveguide. The antireflective mechanism(s) are in at least one of a first position in the waveguide, a second position in the NFT and a third position between the waveguide and the NFT.
摘要翻译：热辅助磁记录（HAMR）写入装置与提供能量的激光器耦合。所述HAMR写入装置包括极，至少一个线圈，波导，近场换能器（NFT）和至少一个抗反射机构。磁极写入介质的一个区域，并且包括面向媒体的表面。线圈使极点通电。波导与激光器光耦合并且包括芯和包层。波导用于将能量的一部分朝向从波导芯的传输方向的NFT引导。抗反射机构处于波导中的第一位置，NFT中的第二位置和波导与NFT之间的第三位置中的至少一个。

7. 发明授权

US09099103B1 Heat assisted magnetic recording withinterlaced high-power heated and low-power heated tracks 有权
标题翻译：热辅助磁记录内置高功率加热和低功率加热轨道
公开(公告)号：US09099103B1
公开(公告)日：2015-08-04
申请号：US14520064
申请日：2014-10-21
申请人： Western Digital Technologies, Inc.
发明人： Alexander Krichevsky
IPC分类号： G11B11/00 , G11B7/126 , G11B11/105 , G11B5/00
CPC分类号： G11B11/10595 , G11B5/012 , G11B11/10515 , G11B2005/0021
摘要： A method, system and apparatus are described for increasing areal density and track density for a data storage system. Media with high magneto-crystalline anisotropy is heated locally during writing, utilizing heating methods such as heat-assisted magnetic recording, energy assisted magnetic recording, thermally assisted recording. In an aspect, high-power heated tracks of a magnetic recording layer are heated and written, and then low-power heated tracks are heated and written. The high-power heated tracks and the low-power heated tracks are interlaced, such that a low-power heated track is situated between two high-power heated tracks. In an aspect, media rewriting speed is increased. In an aspect, the high-power heated tracks and low-power heated tracks are written to at substantially the same data rate and linear density. In an aspect, any erasure of any portion of the high-power heated tracks from heating the low-power heated tracks is avoided, or minimized.
摘要翻译：描述了一种用于增加数据存储系统的面密度和轨道密度的方法，系统和装置。采用热辅助磁记录，能量辅助磁记录，热辅助记录等加热方法，在书写期间局部加热磁结晶各向异性高的介质。在一方面，磁记录层的大功率加热轨迹被加热和写入，然后加热和写入低功率加热轨迹。高功率加热轨道和低功率加热轨道交错，使得低功率加热轨道位于两个高功率加热轨道之间。在一方面，媒体重写速度提高。在一个方面，高功率加热轨道和低功率加热轨道以基本上相同的数据速率和线密度被写入。在一方面，避免或最小化对加热低功率加热轨道的大功率加热轨道的任何部分的任何擦除。

8. 发明授权

US09064525B2 Disk drive comprising laser transmission line optimized for heat assisted magnetic recording 有权
标题翻译：包括激光传输线的磁盘驱动器，用于热辅助磁记录优化
公开(公告)号：US09064525B2
公开(公告)日：2015-06-23
申请号：US14091098
申请日：2013-11-26
申请人： Western Digital Technologies, Inc.
发明人： Alexander Krichevsky , Robert J. Johnson
IPC分类号： G11B11/00 , G11B13/04
CPC分类号： G11B5/486 , G11B2005/0021
摘要： A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. At least one transmission line couples a laser driver to the laser. Data is written to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser.
摘要翻译：公开了一种磁盘驱动器，包括盘和头，其包括被配置为在写入盘的同时加热盘的激光器。至少一个传输线将激光驱动器耦合到激光器。通过脉冲激光驱动器将数据写入磁盘，其中传输线包括导致由激光器输出的光功率的目标脉冲形状的阻抗。

9. 发明授权

US09074941B1 Systems and methods for measuring ambient and laser temperature in heat assisted magnetic recording 有权
标题翻译：用于测量热辅助磁记录中的环境温度和激光温度的系统和方法
公开(公告)号：US09074941B1
公开(公告)日：2015-07-07
申请号：US13827089
申请日：2013-03-14
申请人： Western Digital Technologies, Inc.
发明人： Alexander Krichevsky , Robert J. Johnson
IPC分类号： G07D5/00 , G01K7/00
CPC分类号： G01K7/00 , G01K7/01 , G01K2217/00 , G11B5/012 , G11B5/02 , G11B5/40 , G11B5/5534 , G11B2005/0021
摘要： Systems and methods for measuring ambient and laser temperature in heat assisted magnetic recording (HAMR) systems are provided. One such system includes a slider having a write head, a laser diode coupled to the slider and configured to direct energy to a magnetic medium, and a preamplifier circuit including a voltage measurement circuit configured to measure a voltage drop across the laser diode, and a current measurement circuit configured to measure a current through the laser diode, where the preamplifier circuit is configured to store calibration information including a plurality of temperatures corresponding with measurements of the voltage drop across the laser diode and measurements of the current through the laser diode, and calculate a temperature based on the measured voltage drop across the laser diode, the measured current through the laser diode, and the calibration information.
摘要翻译：提供了用于测量热辅助磁记录（HAMR）系统中的环境温度和激光温度的系统和方法。一种这样的系统包括具有写入头，耦合到滑块并被配置为将能量引导到磁性介质的激光二极管的滑块和包括被配置成测量激光二极管两端的电压降的电压测量电路的前置放大器电路，以及电流测量电路，被配置为测量通过激光二极管的电流，其中前置放大器电路被配置为存储校准信息，该校准信息包括对应于激光二极管上的电压降的测量值和通过激光二极管的电流的测量值的多个温度，以及基于测量的激光二极管上的电压降，通过激光二极管的测量电流和校准信息来计算温度。

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