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1. 发明授权

US09953670B1 Method and system for providing a HAMR writer including a multi-mode interference device 有权
公开(公告)号：US09953670B1
公开(公告)日：2018-04-24
申请号：US14936967
申请日：2015-11-10
申请人： Western Digital (Fremont), LLC
发明人： Jianwei Mu , Sergei Sochava , Michael V. Morelli
IPC分类号： G11B5/127 , G11B5/48 , G11B5/60 , G11B5/00 , G11B5/012
CPC分类号： G11B5/4866 , G11B5/012 , G11B5/127 , G11B5/6088 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) write apparatus includes a laser for providing energy and resides in proximity to a media during use. The HAMR write apparatus includes a write pole that writes to a region of the media, coil(s) for energizing the write pole and a waveguide optically coupled with the laser. The waveguide includes at least one multi-mode interference (MMI) device. The MMI device has at least one input, a plurality of outputs, a propagation section and a multi-mode interference (MMI) section. Energy from the laser propagates through the propagation section before the MMI section. The propagation section expands the energy from the laser to a plurality of modes. A first portion of the outputs is output from the propagation section. The MMI section is between the propagation section and a second portion of the plurality of outputs.

2. 发明授权

US09697854B1 Heat assisted magnetic recording write apparatus having an inverse tapered waveguide 有权
公开(公告)号：US09697854B1
公开(公告)日：2017-07-04
申请号：US15216639
申请日：2016-07-21
申请人： Western Digital (Fremont), LLC
发明人： Michael V. Morelli , Sergei Sochava
IPC分类号： G11B11/00 , G11B5/48 , G11B5/00
CPC分类号： G11B5/4866 , G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： A heat assisted magnetic recording (HAMR) write apparatus has a media-facing surface (MFS) and includes a pole, coil(s) and a waveguide. The waveguide is optically coupled with a laser and directs energy toward the MFS. The waveguide includes an entrance, a bottom and a mode converter having a core, an inner cladding, high index layer(s) and an outer cladding. The core has sides that diverge in width. The core has a first index of refraction. The outer cladding has a second index of refraction less than the first index of refraction. The inner cladding has a third index of refraction not greater than the second index of refraction. The inner cladding is between the high index layer(s) and the core. The high index layer(s) are between the inner and outer cladding. The high index layer(s) have a high index of refraction greater than the second index of refraction.

3. 发明授权

US09384765B1 Method and system for providing a HAMR writer having improved optical efficiency 有权
标题翻译：提供具有改善的光学效率的HAMR写入器的方法和系统
公开(公告)号：US09384765B1
公开(公告)日：2016-07-05
申请号：US14864665
申请日：2015-09-24
申请人： Western Digital (Fremont), LLC
发明人： Jianwei Mu , Hongxing Yuan , Michael V. Morelli , Sergei Sochava
IPC分类号： G11B5/02 , G11B5/33 , G11B5/48 , G11B5/60 , G11B11/00 , G11B5/00
CPC分类号： G02B6/122 , G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) write apparatus includes a laser and has an air-bearing surface (ABS) that resides in proximity to a media during use. The HAMR write apparatus includes a write pole that writes to the media, coil(s) for energizing the write pole and a waveguide optically coupled with the laser. The waveguide includes an entrance distal from the ABS and a bottom proximate to the ABS. The waveguide also includes a mode converter, a mode stripper optically coupled with the mode converter and an inverse tapered section optically coupled with the mode stripper. The mode converter has sides converging from a first width proximate to the entrance to a second width distal from the entrance and less than the first width. The mode stripper is between the inverse tapered section and the mode converter. The inverse tapered section has an entrance and an exit wider than the entrance.
摘要翻译：热辅助磁记录（HAMR）写入装置包括激光器并且在使用期间具有驻留在介质附近的空气轴承表面（ABS）。 HAMR写装置包括写入磁极的写极，用于激励写磁极的线圈和与激光器光耦合的波导。波导包括远离ABS的入口和靠近ABS的底部。波导还包括模式转换器，与模式转换器光学耦合的模式剥离器和与模式剥离器光学耦合的倒锥形部分。模式转换器具有从接近入口的第一宽度到远离入口的第二宽度并且小于第一宽度的侧边会聚的侧面。模式剥离器在逆锥形部分和模式转换器之间。倒锥部具有比入口宽的入口和出口。

4. 发明授权

US09001629B1 Systems and methods for suppressing background energy of a waveguide in an energy assisted magnetic recording system 有权
标题翻译：用于抑制能量辅助磁记录系统中的波导的背景能的系统和方法
公开(公告)号：US09001629B1
公开(公告)日：2015-04-07
申请号：US13664981
申请日：2012-10-31
申请人： Western Digital (Fremont), LLC
发明人： Hongxing Yuan , Ronald L. Allen , Michael V. Morelli , Matthew R. Gibbons , Zhong Shi
IPC分类号： G11B11/00 , G11B5/02 , G11B11/105
CPC分类号： G11B11/105 , G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： Systems and methods for suppressing the background energy of a waveguide in an EAMR system are provided. One such system includes a near field transducer having a disk section and a pin section extending from the disk section to an air bearing surface of a slider, a waveguide having a core and a cladding, where the waveguide is configured to couple light energy to the near field transducer, where the cladding is configured to substantially surround the core, and a recess portion positioned between the core and the air bearing surface.
摘要翻译：提供了用于抑制EAMR系统中的波导的背景能量的系统和方法。一种这样的系统包括具有盘部分和从盘部分延伸到滑块的空气轴承表面的销部分的近场换能器，具有芯和包层的波导，其中波导被配置为将光能耦合到近场传感器，其中所述包层构造成基本围绕所述芯，以及位于所述芯和所述空气支承表面之间的凹部。

5. 发明授权

US09001628B1 Assistant waveguides for evaluating main waveguide coupling efficiency and diode laser alignment tolerances for hard disk 有权
标题翻译：用于评估主波导耦合效率的辅助波导和硬盘的二极管激光对准公差
公开(公告)号：US09001628B1
公开(公告)日：2015-04-07
申请号：US14229416
申请日：2014-03-28
申请人： Western Digital (Fremont), LLC
发明人： Zhong Shi , Paul Lin , Michael V. Morelli , Weigang Wang
IPC分类号： G11B11/105 , G11B13/08 , G11B27/36 , G11B5/48
CPC分类号： G11B5/4866 , G11B5/314 , G11B5/455 , G11B5/6088 , G11B2005/0021
摘要： A heat assisted magnetic recording (HAMR) transducer on a slider and including first and second opposing surfaces, wherein the first surface is aligned to an air bearing surface (ABS) of the slider and the second surface is aligned to a surface of the slider opposite the ABS, a target waveguide having an entrance at the second surface, the target waveguide being configured to direct energy provided by a light source from the entrance toward the first surface, wherein the target waveguide expands in cross-section area with distance from the entrance to form an inverse taper waveguide, a plurality of assistant waveguides each having an entrance at the second surface, wherein the plurality of assistant waveguides are configured to direct energy to the plurality of output devices.
摘要翻译：一种在滑块上的热辅助磁记录（HAMR）换能器，包括第一和第二相对表面，其中第一表面与滑动件的空气支承表面（ABS）对准，第二表面与滑块相对的表面对准所述ABS是在所述第二表面具有入口的目标波导，所述目标波导被配置为将由光源提供的能量从所述入口引导到所述第一表面，其中所述目标波导在与所述入口的距离处的横截面积中扩展以形成倒锥形波导，多个辅助波导，每个辅助波导在第二表面具有入口，其中多个辅助波导被配置为将能量引导到多个输出设备。

6. 发明授权

US08971160B1 Near field transducer with high refractive index pin for heat assisted magnetic recording 有权
$Near field transducer with high refractive index pin for heat assisted magnetic recording$
标题翻译：用于热辅助磁记录的具有高折射率针的近场传感器
公开(公告)号：US08971160B1
公开(公告)日：2015-03-03
申请号：US14227340
申请日：2014-03-27
申请人： Western Digital (Fremont), LLC
发明人： Hongxing Yuan , Michael V. Morelli , Jiangrong Cao , Brad V. Johnson , Rabee M. Ikkawi
IPC分类号： G11B11/00 , G11B5/40 , G11B13/08
CPC分类号： G11B5/40 , G11B5/3136 , G11B5/314 , G11B2005/0021
摘要： An HAMR NFT pin and main body structure comprising a pin material with high index of refraction and low absorption coefficient is disclosed. The disclosed NFT pin provides a comparable media absorption efficiency to the conventional Au pin while improving on overall NFT reliability. The protrusion of the NFT pin is reduced and overall life of the writer is prolonged. The main body may comprise any noble metal or metal alloy suitable for achieving optical resonance in an HAMR NFT. The cladding material may be selected such that its coefficient of thermal expansion closely matches the coefficient of thermal expansion of the pin material.
摘要翻译：公开了一种包括具有高折射率和低吸收系数的引脚材料的HAMR NFT引脚和主体结构。所公开的NFT引脚提供了与常规Au引脚相当的介质吸收效率，同时提高了整体NFT的可靠性。 NFT销的突起减小，作者的整个寿命延长。主体可以包括适合于在HAMR NFT中实现光学共振的任何贵金属或金属合金。可以选择包层材料，使得其热膨胀系数与针材料的热膨胀系数近似匹配。

7. 发明授权

US09424866B1 Heat assisted magnetic recording write apparatus having a dielectric gap 有权
标题翻译：具有电介质间隙的热辅助磁记录装置
公开(公告)号：US09424866B1
公开(公告)日：2016-08-23
申请号：US14864716
申请日：2015-09-24
申请人： Western Digital (Fremont), LLC
发明人： Jiangrong Cao , Brad V. Johnson , Michael V. Morelli , Peng Zhang
IPC分类号： G11B5/127 , G11B5/31 , G11B5/48 , G11B5/60 , G11B7/124 , G11B5/00
CPC分类号： G11B5/314 , G11B5/1278 , G11B5/3133 , G11B5/6088 , G11B7/124 , G11B2005/0021
摘要： A heat assisted magnetic recording (HAMR) write apparatus coupled with a laser is described. The HAMR write apparatus includes a pole, coil(s), a near-field transducer (NFT), and a dielectric gap. The pole writes to the media. The coil(s) energize the pole. The waveguide is optically coupled with the laser and directs energy toward the ABS. The NFT is optically coupled with the waveguide and includes a metal nose and a metal cap. Part of the metal cap adjoins part of the main pole. The dielectric gap is between a first portion of the NFT and the main pole. The dielectric gap has a media-facing surface and back, top, bottom and side surfaces. The top surface adjoins the main pole. The bottom surface adjoins the first portion of the NFT. The side surfaces adjoin a second portion of the NFT. The back surface adjoins a portion of the metal cap.
摘要翻译：描述了与激光耦合的热辅助磁记录（HAMR）写入装置。 HAMR写装置包括极，线圈，近场换能器（NFT）和电介质间隙。极点写给媒体。线圈使极点通电。波导与激光器光学耦合，并将能量引向ABS。 NFT与波导光学耦合，并且包括金属鼻和金属帽。金属盖的一部分与主极的部分相邻。电介质间隙在NFT的第一部分和主极之间。电介质间隙具有面向介质的表面和背面，顶部，底部和侧面。顶面邻接主杆。底面邻接NFT的第一部分。侧面邻接NFT的第二部分。后表面邻接金属盖的一部分。

8. 发明授权

US09336814B1 Inverse tapered waveguide for use in a heat assisted magnetic recording head 有权
标题翻译：用于热辅助磁记录头的倒锥形波导
公开(公告)号：US09336814B1
公开(公告)日：2016-05-10
申请号：US13797268
申请日：2013-03-12
申请人： Western Digital (Fremont), LLC
发明人： Zhong Shi , Michael V. Morelli , Yunfei Li , Matthew R. Gibbons
IPC分类号： G11B11/00 , G11B5/48 , G11B5/00 , G11B13/04 , G11B5/60 , G11B7/1387 , G11B11/105 , G11B11/24 , G11B5/31 , G11B7/124 , G02B6/00 , G02B6/125 , G02B6/122
CPC分类号： G02B6/1228 , G02B6/00 , G02B6/122 , G02B6/125 , G02B6/2813 , G11B5/105 , G11B5/3116 , G11B5/314 , G11B5/6088 , G11B7/124 , G11B7/1387 , G11B11/1058 , G11B11/24 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) transducer 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 transducer includes a write pole, at least one coil, and an inverse tapered waveguide optically coupled with the laser. The write pole is configured to write to a region of the media. The coil(s) energize the write pole. The inverse tapered waveguide includes an entrance distal from the ABS, a bottom proximate to the ABS, a first side and a second side opposite to the first side. The first side and the second side diverging such that at least a portion of the inverse tapered waveguide between the bottom and the top is wider than the entrance.
摘要翻译：热辅助磁记录（HAMR）传感器与用于提供能量的激光器耦合，并且具有配置成在使用期间驻留在介质附近的空气轴承表面（ABS）。 HAMR传感器包括写入极，至少一个线圈和与激光器光学耦合的倒锥形波导。写入极配置为写入介质的一个区域。线圈使写入极点通电。倒锥形波导包括远离ABS的入口，靠近ABS的底部，第一侧和与第一侧相对的第二侧。第一侧和第二侧发散，使得底部和顶部之间的倒锥形波导的至少一部分比入口宽。

9. 发明授权

US09007879B1 Interfering near field transducer having a wide metal bar feature for energy assisted magnetic recording 有权
标题翻译：干扰具有宽金属棒特征的近场传感器用于能量辅助磁记录
公开(公告)号：US09007879B1
公开(公告)日：2015-04-14
申请号：US14324294
申请日：2014-07-07
申请人： Western Digital (Fremont), LLC
发明人： Jiangrong Cao , Michael V. Morelli , Matthew R. Gibbons , Peng Zhang , Brad V. Johnson , Hongxing Yuan
IPC分类号： G11B11/00 , G11B5/48 , G11B5/00
CPC分类号： G11B5/314 , G11B5/6088 , G11B2005/0021
摘要： An apparatus for energy assisted magnetic recording of a storage disk include a plurality of dielectric waveguide cores configured to direct received incident light energy to a target, and a near field transducer (NFT) configured to focus light energy received from the plurality of waveguide cores and to transmit the focused light energy onto the storage disk surface to generate a heating spot on the storage disk. The NFT includes a plurality of propagating surface plasmon polariton (PSPP) elements that are energized by the light energy from the waveguide cores. Each of the PSPP elements has a plasmonic metal bar disposed above a single waveguide core in a longitudinal alignment. Each metal bar has a width at least twice the width of the heating spot generated on the storage disk.
摘要翻译：用于存储盘的能量辅助磁记录的装置包括：多个电介质波导芯，被配置为将接收的入射光能引导到目标;以及近场换能器（NFT），被配置为聚焦从所述多个波导芯接收的光能，以及将聚焦的光能传递到存储盘表面上以在存储盘上产生加热点。 NFT包括由波导芯的光能激励的多个传播表面等离子体激元（PSPP）元件。每个PSPP元件具有在纵向对准中设置在单个波导芯上方的等离子体金属棒。每个金属棒的宽度至少是存储盘上产生的加热点宽度的两倍。

10. 发明授权

US08836949B1 Systems and methods for characterizing near field transducer performance at wafer level using asymmetric interference waveguides 有权
标题翻译：使用不对称干涉波导在晶片级表征近场传感器性能的系统和方法
公开(公告)号：US08836949B1
公开(公告)日：2014-09-16
申请号：US13621728
申请日：2012-09-17
申请人： Western Digital (Fremont), LLC
发明人： Zhong Shi , Michael V. Morelli , Hongxing Yuan
IPC分类号： G01B9/02 , G11B5/02
CPC分类号： G11B5/3166 , G02B6/1226 , G11B2005/0021
摘要： Systems and methods and apparatuses for characterizing near field transducer performance at wafer level using asymmetric interference waveguides are provided. One such system includes a light source, an input grating configured to receive light from the light source, a first waveguide arm and a second waveguide arm, each configured to receive the light, a surface plasmon receptor optically coupled to the first waveguide arm and the second waveguide arm and configured to receive light from the first waveguide arm in a first direction and the second waveguide arm in a second direction opposite of the first direction, where the first and the second waveguide arms are configured to induce a preselected phase difference in light arriving at the surface plasmon receptor, and an output grating optically coupled to the surface plasmon receptor, and a light detector coupled to, and configured to detect light from, the first output grating.
摘要翻译：提供了使用非对称干涉波导在晶片级表征近场传感器性能的系统和方法和装置。一个这样的系统包括光源，被配置为接收来自光源的光的输入光栅，第一波导臂和第二波导臂，每个配置用于接收光;光学耦合到第一波导臂的表面等离子体受体和第二波导臂并且被配置为沿着第一方向从第一波导臂接收光，而第二波导臂在与第一方向相反的第二方向上接收，其中第一和第二波导臂被配置为在光中引入预选的相位差到达表面等离子体激元受体，以及光学耦合到表面等离子体激元受体的输出光栅，以及耦合到并且被配置为检测来自第一输出光栅的光的光检测器。

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