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Systems and methods for heat dissipation from near-field transducers in energy-assisted magnetic recording devices

A near-field transducer and energy-assisted technology, applied in magnetic recording, data recording, recording information storage, etc., can solve the problems of limited heat capacity of metal heat sink, damaged NFT, and low heat dissipation rate

Active Publication Date: 2016-09-21
WESTERN DIGITAL TECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the heat capacity of the metal heat sink itself is very limited
Third, because the metal heat sink is smaller than the NFT, there is a significant risk of damaging the NFT during the process of making the metal heat sink
Likewise, the heat dissipation rate is inferior

Method used

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  • Systems and methods for heat dissipation from near-field transducers in energy-assisted magnetic recording devices
  • Systems and methods for heat dissipation from near-field transducers in energy-assisted magnetic recording devices
  • Systems and methods for heat dissipation from near-field transducers in energy-assisted magnetic recording devices

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Embodiment Construction

[0020] In an energy-assisted magnetic recording (EAMR) system, a near-field transducer (NFT) couples light from a waveguide, focuses the light into a highly concentrated spot of nanometer size, and delivers the energy to the magnetic recording medium to achieve EAMR writing. input or record. The reliability of the NFT often directly determines the life of the EAMR head (eg, slider) and the hard drive including the EAMR head. NFTs can become very hot during their operation due to the strong absorption of light energy by NFTs caused by resonant localized surface plasmons (LSPs). Therefore, NFTs are typically cooled by heat sinks, which can be a key element in adapting an NFT to its operating environment.

[0021] Embodiments of the present invention are directed to non-metallic heat sinks formed of, for example, dielectric materials with relatively high thermal conductivity, such as AlN, BN, and other suitable non-metallic materials, to replace the limited metallic heat sinks u...

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Abstract

Embodiments of the invention relate to recording heads for energy-assisted magnetic recording. The recording head includes a near-field transducer (NFT) with a preselected shape and surface, a write pole on the NFT, and a non-metallic heat sink disposed between the NFT surface and the write pole. The non-metallic heat sink includes a first portion in contact with the NFT surface, the first portion extending beyond an edge of the NFT surface in a first direction substantially perpendicular to the air bearing surface (ABS) and parallel to the NFT surface.

Description

technical field [0001] Aspects of the invention relate to energy assisted magnetic recording (EAMR), and in particular to systems and methods for dissipating heat from near-field transducers in EAMR devices. Background technique [0002] For the current perpendicular magnetic recording technology, the magnetic recording areal density has reached about 700 to 800Gb / in 2 , which will reach a physical upper limit due to the superparamagnetic effect. In hard disk drives, the superparamagnetic effect sets a limit on storage density due to the smallest size of magnetic domains that can be used in magnetic recording media. Although magnetic materials with higher coercivity such as FePt, CoPd, etc. are available, these materials generally have poor writability due to shortage in the writing area of ​​conventional write heads. [0003] Because Energy-Assisted Magnetic Recording (EAMR) or Heat-Assisted Magnetic Recording (HAMR) technology avoids the writability problem described abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/127G11B5/40
CPCG11B5/314G11B5/6088G11B2005/0021
Inventor H·元Z·王W·严Y·陈M·R·吉本斯Z·史
Owner WESTERN DIGITAL TECH INC
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