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1.发明授权公开(公告)号：US08891341B1
公开(公告)日：2014-11-18
申请号：US13794166
申请日：2013-03-11
Applicant: Western Digital Technologies, Inc.
Inventor： Alexander Krichevsky , Michael L. Mallary , Fenghua Zong
CPC classification number: G11B5/02 , G11B2005/0021
Abstract: 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.
Abstract translation: 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。
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2.发明授权公开(公告)号：US10249336B1
公开(公告)日：2019-04-02
申请号：US15853770
申请日：2017-12-23
Applicant: 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
Inventor： Alexander Krichevsky , Frank Bello , Christopher Wolf , Fenghua Zong , Daniel Wolf , David McCloskey , Kyle Ballantine , John Donegan
Abstract: 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.
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公开(公告)号：US10650854B1
公开(公告)日：2020-05-12
申请号：US15489167
申请日：2017-04-17
Applicant: Western Digital Technologies, Inc.
Inventor： Hua Yuan , Paul Christopher Dorsey , Fenghua Zong , Shahid Ali Pirzada , Allen Joseph Bourez , Zhaoqiang Bai
Abstract: A heat-assisted magnetic recording (HAMR) medium has a heat-sink layer, a chemically-ordered FePt (or CoPt) alloy magnetic layer and a MgNiO intermediate layer between the heat-sink layer and the magnetic layer. The intermediate layer is a solid substitution crystalline alloy of the form (Mg(100-y)Niy)O, where y is less than 10 and greater than or equal to 0.5. The magnetic layer may be formed directly on the MgNiO intermediate layer, in which case the MgNiO intermediate layer functions as both a seed layer and a thermal barrier layer. The HAMR medium may also include an optional layer of crystalline “pure” MgO directly below or directly above the MgNiO intermediate layer. If the MgO layer is located directly above the MgNiO intermediate layer then the MgNiO intermediate layer functions primarily as a thermal barrier layer. The HAMR medium with the MgNiO intermediate layer provides a substantial improvement in corrosion resistance.
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公开(公告)号：US10360939B2
公开(公告)日：2019-07-23
申请号：US15853768
申请日：2017-12-23
Applicant: 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
Inventor： Alexander Krichevsky , Frank Bello , Christopher Wolf , Fenghua Zong , Daniel Wolf , David McCloskey , Kyle Ballantine , John Donegan
Abstract: 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.
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