Devices including a near field transducer (NFT), at least one cladding layer and interlayer there between

Patent metadata

Field	Value
Publication number	US-9767832-B2
Application number	US-201615049343-A
Country	US
Kind code	B2
Filing date	Feb 22, 2016
Priority date	Jul 10, 2015
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A device that includes a near field transducer (NFT); at least one cladding layer adjacent the NFT; and a carbon interlayer positioned between the NFT and the at least one cladding layer.

First claim

What is claimed is:

1. A device comprising:
a near field transducer (NFT), the NFT comprising gold and at least one of Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo dopant; an oxide dopant comprising at least one of: V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th; or a nitride dopant comprising at least one of: Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B, and the NFT having sides, top and a bottom;
at least one cladding layer adjacent the NFT; and
a carbon interlayer positioned between the NFT and the at least one cladding layer.

2. The device according to claim 1 , wherein the NFT has a dopant concentration in a range from 0.5% to 30%.

3. The device according to claim 1 , wherein the NFT comprises gold and Rh.

4. The device according to claim 1 , wherein the at least one cladding layer comprises Y 2 O 3 , Ta 2 O 5 , Al 2 O 3 , SiO 2 , MgO, MgF2, Si 3 N 4 , SiON, TaSiO x , or combinations thereof.

5. The device according to claim 1 , wherein the carbon interlayer comprises amorphous carbon.

6. The device according to claim 1 , wherein the carbon interlayer has a thickness from about 2 nm to about 15 nm.

7. The device according to claim 1 , wherein the carbon interlayer is positioned on at least the sides and top of the NFT.

8. The device according to claim 1 , wherein the carbon interlayer is positioned on at least the sides, top and bottom of the NFT.

9. The device according to claim 1 , wherein the carbon interlayer comprises at least some metal from the NFT, wherein the metal from the NFT diffused into the amorphous carbon, carbon diffused into the NFT metal, or a combination thereof.

10. The device according to claim 9 , wherein the NFT comprises gold and a dopant selected from an oxide or nitride in the form of a nanoparticle.

11. A device comprising:
an energy source;
a near field transducer (NFT) configured to receive energy from the energy source, the NFT comprising gold and at least one of Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo dopant; an oxide dopant comprising at least one of: V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th; or a nitride dopant comprising at least one of: Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B, and the NFT having sides, top and a bottom;
at least one cladding layer adjacent the NFT; and
a carbon interlayer positioned between the NFT and the at least one cladding layer.

12. The device according to claim 11 , wherein the carbon interlayer comprises amorphous carbon.

13. The device according to claim 11 , wherein the carbon interlayer has a thickness from about 2 nm to about 15 nm.

14. The device according to claim 11 , wherein the carbon interlayer is positioned on at least the sides and top of the NFT.

15. The device according to claim 11 , wherein the carbon interlayer is positioned on at least the sides, top and bottom of the NFT.

16. The device according to claim 11 , wherein the carbon interlayer comprises at least some a metal from the NFT, wherein the metal from the NFT diffused into the amorphous carbon, carbon diffused into the NFT metal, or a combination thereof.

17. The device according to claim 16 , wherein the NFT comprises gold and a dopant selected from an oxide or nitride in the form of a nanoparticle.

18. The device according to claim 11 further comprising a waveguide, the waveguide configured to receive the energy from the energy source and couple it into the NFT.

19. A device comprising:
a near field transducer (NFT), the NFT comprising gold and at least one of Cu, Rh, Ru, Ag, Ta, Cr, Al, Zr, V, Pd, Ir, Co, W, Ti, Mg, Fe, or Mo dopant; an oxide dopant comprising at least one of: V, Zr, Mg, Ca, Al, Ti, Si, Ce, Y, Ta, W, or Th; or a nitride dopant comprising at least one of: Ta, Al, Ti, Si, In, Fe, Zr, Cu, W or B, and the NFT having sides, top and a bottom;
a write pole;
a waveguide;
a NFT to pole space (NPS) cladding layer positioned between the NFT and the pole;
a core to NFT space (CNS) cladding layer positioned between the waveguide and the NFT; and
at least one carbon interlayer comprising amorphous carbon and positioned between the NPS and the NFT, the CNS and the NFT, or both.

20. The device according to claim 19 , wherein the NFT comprises gold and Rh.

Assignees

• Seagate Technology Llc

Inventors

• Brons Justin Glen
• Zhao Tong
• Huang Xiaoyue
• Kautzky Michael C

Classifications

• G11B5/314 Primary

  where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers (G11B5/3196 takes precedence) · CPC title

• G11B2005/0021

  Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal · CPC title

• G11B5/6088

  Optical waveguide in or on flying head · CPC title