Near-field transducer (NFT) for a heat assisted magnetic recording (HAMR) device
A method and system provides a near-field transducer (NFT) for a heat assisted magnetic recording (HAMR) transducer. The method and system include forming the disk of the NFT and forming the pin of the NFT. The disk is formed from a first material. The pin is formed from a second material different from the first material. The pin contacts the disk. At least a portion of the pin is between the disk and an air-bearing surface (ABS) location.
1. A magnetic write apparatus comprising:
a near-field transducer comprising:
a disk; and
a pin between an air bearing surface of the magnetic write apparatus and the disk, wherein the disk is recessed from the air bearing surface;
wherein the pin occupies a portion of the air bearing surface;
wherein the disk comprises a metallic material;
wherein the pin comprises a dielectric material;
wherein the disk extends further than the pin in a first direction that is perpendicular to the air bearing surface; and
wherein the disk extends further than the pin in a second direction that is perpendicular to the air bearing surface and the first direction.
2. The magnetic write apparatus of claim 1 , wherein the dielectric material of the pin comprises tantalum oxide.
3. The magnetic write apparatus of claim 1 , wherein the dielectric material of the pin comprises titanium oxide.
4. The magnetic write apparatus of claim 1 , wherein the dielectric material of the pin comprises silicon.
5. The magnetic write apparatus of claim 1 , wherein the metallic material of the disk comprises gold.
6. The magnetic write apparatus of claim 1 , wherein the pin is in physical contact with the disk.
7. The magnetic write apparatus of claim 1 , wherein the pin is substantially rectangular in cross-section.
8. The magnetic write apparatus of claim 1 , wherein the disk is substantially circular in cross-section.
9. The magnetic write apparatus of claim 1 , wherein a length of the pin from the air bearing surface to the disk is at least ten nanometers and not more than fifteen nanometers.
10. The magnetic write apparatus of claim 1 , wherein a width of the pin in the second direction is at least fifty nanometers and not mot more than two hundred nanometers.
11. The magnetic write apparatus of claim 1 , further comprising a heat sink in thermal contact with a write pole and the disk of the near-field transducer, wherein the heat sink is configured to conduct heat away from the near-field transducer during operation of the near-field transducer.
12. The magnetic write apparatus of claim 11 , wherein a top surface of the heat sink conforms to a bottom surface of the write pole.
13. The magnetic write apparatus of claim 1 , further comprising a waveguide configured to direct energy from a light source to the near-field transducer.
14. A magnetic write apparatus comprising:
a near-field transducer comprising:
a disk; and
a pin between an air bearing surface of the magnetic write apparatus and the disk, wherein the disk is recessed from the air bearing surface;
wherein the pin occupies a portion of the air bearing surface;
wherein the disk comprises gold;
wherein the pin comprises tantalum oxide;
wherein the disk extends further than the pin in a first direction that is perpendicular to the air bearing surface; and
wherein the disk extends further than the pin in a second direction that is perpendicular to the air bearing surface and the first direction.
15. The magnetic write apparatus of claim 14 , further comprising a heat sink having a top surface and a bottom surface, wherein the top surface is in thermal contact with a write pole and the bottom surface is in thermal contact with the near-field transducer, and wherein the heat sink is configured to conduct heat away from the near-field transducer to the write pole during operation of the near-field transducer.
16. The magnetic write apparatus of claim 14 , further comprising a waveguide configured to direct energy from a light source to the near-field transducer, wherein the waveguide comprises:
a core; and
a cladding surrounding the core,
wherein the core comprises a first dielectric material; and
wherein the cladding comprises a second dielectric material.
17. The magnetic write apparatus of claim 16 , wherein the first dielectric material comprises tantalum oxide and the second dielectric material comprises silicon oxide.
18. A magnetic write apparatus comprising:
a near-field transducer comprising:
a disk recessed from an air bearing surface of the magnetic write apparatus, wherein the disk comprises a metallic material; and
a pin between the air bearing surface and the disk, wherein the pin occupies a portion of the air bearing surface and comprises a dielectric material;
a waveguide recessed from the air bearing surface and configured to direct energy from a light source to the near-field transducer; and
a heat sink in thermal contact with the near-field transducer, wherein the heat sink is configured to conduct heat away from the near-field transducer;
wherein the disk extends further than the pin in a first direction that is perpendicular to the air bearing surface; and
wherein the disk extends further than the pin in a second direction that is perpendicular to the air bearing surface and the first direction.
19. The magnetic write apparatus of claim 18 , wherein the dielectric material of the pin comprises one of tantalum oxide, titanium oxide, and silicon, and wherein the metallic material of the disk comprises gold.