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

Patent metadata

Field	Value
Publication number	US-10109303-B2
Application number	US-201715707355-A
Country	US
Kind code	B2
Filing date	Sep 18, 2017
Priority date	Jul 10, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

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 a material having a first index of refraction;
at least one cladding layer adjacent the NFT, the at least one cladding layer comprising dielectric material and having a second index of refraction, wherein the second index of refraction is less than the first index of refraction; 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 comprises gold (Au), gold (Au) doped with another material, silver (Ag), silver (Ag) doped with another material, copper (Cu), or aluminum (Al).

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

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, MgF 2 , 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.

10. The device according to claim 9 , wherein the metal from the NFT diffused into the amorphous carbon, carbon diffused into the NFT metal, or a combination thereof.

11. A device comprising:
an energy source;
a near field transducer (NFT) configured to receive energy from the energy source, the NFT comprising a material having a first index of refraction;
at least one cladding layer adjacent the NFT, the at least one cladding layer comprising dielectric material and having a second index of refraction, wherein the second index of refraction is less than the first index of refraction; 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 metal from the NFT.

17. The device according to claim 16 , wherein the metal from the NFT diffused into the amorphous carbon, carbon diffused into the NFT metal, or a combination thereof.

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);
a write pole;
a waveguide;
a NFT-pole spacer (NPS) cladding layer positioned between the NFT and the pole, the at least one NPS cladding layer comprising dielectric material;
a core-NFT spacer (CNS) cladding layer positioned between the waveguide and the NFT, the at least one CNS cladding layer comprising dielectric material; 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 at least one carbon interlayer is positioned between the NPS and the NFT and the CNS and the NFT.

Assignees

• Seagate Technology Llc

Inventors

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

Classifications

• G11B2005/0021

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

• 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

• G11B5/6088

  Optical waveguide in or on flying head · CPC title