Near-field transducer having dielectric wrap for reducing heat
AssigneeSeagate Technology LLC
InventorWeibin Chen
Life of this patent
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Abstract
An apparatus comprises a write pole, a waveguide core, and a near-field transducer (NFT) positioned between the write pole and the waveguide core. The NFT comprises an enlarged portion and a peg comprising a refractory metal and extending from the enlarged portion toward a media-facing surface. A first dielectric layer is positioned between the peg and the write pole, and a first adhesion layer is positioned between the peg and the first dielectric layer. In addition, a second dielectric layer is disposed on an entire surface of the NFT opposing the media-facing surface, and a second adhesion layer is positioned between the NFT and the second dielectric layer.
Claims20
An apparatus, comprising:
- a write pole;
- a waveguide core;
- a near-field transducer (NFT) positioned between the write pole and the waveguide core, the NFT comprising an enlarged portion and a peg comprising a refractory metal and extending from the enlarged portion toward a media-facing surface;
- a first dielectric layer positioned between the peg and the write pole;
- a first adhesion layer positioned between the peg and the first dielectric layer;
- a second dielectric layer disposed on an entire surface of the NFT opposing the media-facing surface;
- and
- a second adhesion layer positioned between the NFT and the second dielectric layer.
An apparatus, comprising:
- a write pole;
- a waveguide core;
- a near-field transducer (NFT) positioned between the write pole and the waveguide core, the NFT comprising an enlarged portion and a peg comprising a refractory metal and extending from the enlarged portion toward a media-facing surface;
- a first dielectric layer positioned between the NFT and the write pole;
- and
- a second dielectric layer positioned between the waveguide core and the enlarged portion and peg of the NFT, wherein at least the second dielectric layer has a refractive index less than 1.5.
An apparatus, comprising:
- a write pole;
- a waveguide core;
- a near-field transducer (NFT) positioned between the write pole and the waveguide core, the NFT comprising an enlarged portion and a peg comprising a refractory metal and extending from the enlarged portion toward a media-facing surface;
- a first dielectric layer positioned between the peg and the write pole;
- and
- a second dielectric layer positioned between the NFT and the waveguide core, wherein the second dielectric layer comprises a bi-layer structure having a first dielectric material proximate the peg and a second dielectric material proximate the waveguide core, wherein at least the first dielectric material has a refractive index less than 1.5.
Dependencies are inferred from the claim text.