Near-field transducer having enlarged portion matching outline shape of heat sink
A near-field transducer includes an enlarged portion and a peg protruding from a first edge. The enlarged portion has a second edge facing away from the first edge. The near-field transducer includes a heat sink disposed on the enlarged portion and with an outline shape that matches that of the enlarged portion. The heat sink is disposed at a first separation distance from the first edge of the enlarged portion and a second, greater, separation distance from the second edge of the enlarged portion. The first separation distance is greater than the second separation distance.
1. A near-field transducer comprising:
an enlarged portion and a peg protruding from a first edge of the enlarged portion that faces a recording medium, the enlarged portion comprising a second edge facing away from the recording medium; and
a heat sink disposed on the enlarged portion and having an outline shape that matches that of the enlarged portion, the heat sink disposed at a first separation distance from the first edge of the enlarged portion and a second separation distance from the second edge of the enlarged portion, the first separation distance being greater than the second separation distance.
2. The near-field transducer of claim 1 , wherein the enlarged portion and the peg comprise a contiguous and unified structure.
3. The near-field transducer of claim 1 , wherein the outline shape comprises a stadium shape.
4. The near-field transducer of claim 1 , wherein the second separation distance is zero.
5. The near-field transducer of claim 1 , wherein the heat sink is disposed at first and second non-zero side separation distances from first and second sides of the enlarged portion.
6. The near-field transducer of claim 1 , further comprising a diffusion barrier between the enlarged portion and the heat sink.
7. The near-field transducer of claim 6 , wherein the diffusion barrier surrounds sides of the heat sink.
8. A write head, comprising:
a write pole extending towards a media-facing surface that faces a recording medium; and
a near-field transducer, comprising:
an enlarged portion and a peg protruding from a first edge of the enlarged portion at the media-facing surface, the enlarged portion comprising a second edge facing away from the media-facing surface; and
a heat sink disposed on the enlarged portion and having an outline shape that matches that of the enlarged portion, the heat sink disposed at a first separation distance from the first edge of the enlarged portion and a second separation distance from the second edge of the enlarged portion, the first separation distance being greater than the second separation distance.
9. The write head of claim 8 , wherein the second separation distance is zero.
10. The write head of claim 8 , the heat sink further comprising a sloped surface that faces the write pole.
11. The write head of claim 10 , further comprising a diffusion barrier between the sloped surface and the write pole.
12. The write head of claim 8 , wherein the write pole comprises a protrusion extending towards the peg to form an L-shaped gap between the peg, the enlarged portion, the heat sink, and the protrusion.
13. The write head of claim 12 , wherein the L-shaped gap is filled with a dielectric.
14. The write head of claim 8 , further comprising a diffusion barrier between the enlarged portion and the heat sink.
15. The write head of claim 14 , wherein the diffusion barrier surrounds sides of the heat sink.
16. The write head of claim 14 , wherein the diffusion barrier is between 5 nm and 15 nm.
17. The write head of claim 14 , wherein the diffusion barrier comprises a layer of Rh.
18. The write head of claim 14 , wherein the enlarged portion and the peg comprise a contiguous and unified structure.
19. The write head of claim 14 , wherein the outline shape comprises a stadium shape.