Near-field transducer having edges aligned with waveguide core
A recording head has a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole. A near-field transducer is formed of a thin film of Rh or Ir deposited over the waveguide core layer. The near-field transducer includes an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface. A peg extends from the enlarged part towards the media-facing surface. The waveguide core layer has a terminating end with terminating edges that align with the two straight edges of the near-field transducer.
1. A recording head, comprising:
a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole;
a near-field transducer formed of a thin film of Rh or Ir deposited over the waveguide core layer, the near-field transducer comprising:
an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface; and
a peg extending from the enlarged part towards the media-facing surface, the waveguide core layer having a terminating end with terminating edges that align with the two straight edges of the near-field transducer.
2. The recording head of claim 1 , wherein a side of the enlarged part facing away from the media-facing surface comprises a flat edge parallel with the media-facing surface.
3. The recording head of claim 1 , wherein a side of the enlarged part facing away from the media-facing surface comprises a concave hollow.
4. The recording head of claim 1 , wherein a side of the enlarged part facing away from the media-facing surface comprises a convex bulge.
5. The recording head of claim 1 , further comprising first and second heat sinks along the two straight edges.
6. The recording head of claim 5 , further comprising a planar heat sink on a side of the near-field transducer that faces away from a write pole of the recording head, the planar heat sink joined with the first and second heat sinks.
7. The recording head of claim 1 , further comprising a planar heat sink on a side of the near-field transducer that faces away from a write pole of the recording head.
8. The recording head of claim 1 , further comprising first and second secondary couplers aligned on a downtrack plane with the near-field transducer and each having angled edges that face the respective two straight edges of the enlarged portion.
9. The recording head of claim 1 , further comprising a downtrack gap between the waveguide core layer and the near-field transducer, the downtrack gap filled with a dielectric.
10. The recording head of claim 1 , wherein the waveguide core layer and the near-field transducer are configured to perform a mode conversion of the light before the light couples with the near-field transducer.
11. The recording head of claim 1 , further comprising a write pole, the write pole having a rectangular block at the media-facing surface and proximate the near-field transducer.
12. The recording head of claim 11 , further comprising a peg coupler on a side of the rectangular block that faces the near-field transducer, the peg coupler formed from the same material as the near-field transducer.
13. A recording head, comprising:
a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole;
a near-field transducer formed of a thin film of Rh or Ir deposited over the waveguide core layer, the near-field transducer comprising:
an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface, a side of the enlarged part facing away from the media-facing surface comprising a concave hollow; and
a peg extending from the enlarged portion towards the media-facing surface.
14. The recording head of claim 13 , wherein the waveguide core layer comprises a terminating end with terminating edges that align with the two straight edges of the near-field transducer.
15. The recording head of claim 13 , wherein the waveguide core layer and the near-field transducer are configured to perform a mode conversion of the light before the light couples with the near-field transducer.
16. The recording head of claim 13 , further comprising first and second secondary couplers aligned on a downtrack plane with the near-field transducer and each having angled edges that face the respective two straight edges of the enlarged portion.
17. A recording head, comprising:
a waveguide core layer that delivers light from a light source to a region proximate a magnetic write pole;
a near-field transducer formed of a thin film of Rh or Ir deposited over the waveguide core layer, the near-field transducer comprising:
an enlarged part with two straight edges facing a media-facing surface and at obtuse angles relative to the media-facing surface, a side of the enlarged part facing away from the media-facing surface comprising a convex bulge; and
a peg extending from the enlarged portion towards the media-facing surface.
18. The recording head of claim 17 , wherein the waveguide core layer comprises a terminating end with terminating edges that align with the two straight edges of the near-field transducer.
19. The recording head of claim 17 , wherein the waveguide core layer and the near-field transducer are configured to perform a mode conversion of the light before the light couples with the near-field transducer.
20. The recording head of claim 17 , further comprising first and second secondary couplers aligned on a downtrack plane with the near-field transducer and each having angled edges that face the respective two straight edges of the enlarged portion.