Near-field transducer having secondary atom higher concentration at bottom of the peg

Patent metadata

Field	Value
Publication number	US-9822444-B2
Application number	US-201514938018-A
Country	US
Kind code	B2
Filing date	Nov 11, 2015
Priority date	Nov 11, 2014
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Devices having an air bearing surface (ABS), the device including a near field transducer, the near field transducer having a peg and a disc, the peg having a region adjacent the ABS, the peg including a plasmonic material selected from gold (Au), silver (Ag), copper (Cu), ruthenium (Ru), rhodium (Rh), aluminum (Al), or combinations thereof; and at least one other secondary atom selected from germanium (Ge), tellurium (Te), aluminum (Al), antimony (Sb), tin (Sn), mercury (Hg), indium (In), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), silver (Ag), chromium (Cr), cobalt (Co), and combinations thereof, wherein a concentration of the secondary atom is higher at the region of the peg adjacent the ABS than a concentration of the secondary atom throughout the bulk of the peg, and a method of forming NFT thereof.

First claim

What is claimed is:

1. A device having an air bearing surface (ABS), the device comprising:
a near field transducer, the near field transducer comprising a peg and a disc, the peg having a region adjacent the ABS, the peg comprising:
a plasmonic material selected from gold (Au), silver (Ag), copper (Cu), ruthenium (Ru), rhodium (Rh), aluminum (Al), or combinations thereof; and
and at least one other secondary atom selected from germanium (Ge), tellurium (Te), aluminum (Al), antimony (Sb), tin (Sn), mercury (Hg), indium (In), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), silver (Ag), chromium (Cr), cobalt (Co), and combinations thereof,

wherein a concentration of the secondary atom is higher at the region of the peg adjacent the ABS than a concentration of the secondary atom throughout the bulk of the peg.

2. The device according to claim 1 , wherein the plasmonic material is gold (Au).

3. The device according to claim 1 , wherein the at least one secondary atom is selected from: germanium (Ge), aluminum (Al), antimony (Sb), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), silver (Ag), chromium (Cr), cobalt (Co), or combinations thereof.

4. The device according to claim 1 , wherein the at least one secondary atom is selected from: iron (Fe), cobalt (Co), germanium (Ge), aluminum (Al), antimony, or combinations thereof.

5. The device according to claim 1 , wherein the at least one secondary atom is selected from mercury (Hg).

6. The device according to claim 1 , wherein the NFT comprises a multilayer structure of alternating plasmonic material layers and secondary atom layers.

7. The device according to claim 1 , wherein the NFT comprises an alloy of plasmonic material and secondary atom.

8. The device according to claim 1 , wherein the peg comprises a back region opposite the ABS adjacent region and the device further comprises a block comprising the at least one secondary atom adjacent the back region of the peg.

9. The device according to claim 1 , wherein the NFT comprises about 0.1 atomic percent to about 5 atomic percent of the at least one secondary atom.

10. The apparatus according to claim 1 further comprising an energy source.

11. A device comprising:
a light source;
a waveguide; and
a near field transducer, the near field transducer comprising a peg and a disc, the peg having a region adjacent the ABS, the peg comprising:
a plasmonic material selected from gold (Au), silver (Ag), copper (Cu), ruthenium (Ru), rhodium (Rh), aluminum (Al), or combinations thereof; and
and at least one other secondary atom selected from germanium (Ge), tellurium (Te), aluminum (Al), antimony (Sb), tin (Sn), mercury (Hg), indium (In), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), silver (Ag), chromium (Cr), cobalt (Co), and combinations thereof,
wherein a concentration of the secondary atom is higher at the region of the peg adjacent the ABS than a concentration of the secondary atom throughout the bulk of the peg and
wherein the light source, waveguide and near field transducer are configured to transmit light from the light source to the waveguide and finally the near field transducer.

12. The device according to claim 11 , wherein the plasmonic material is gold (Au).

13. The device according to claim 11 , germanium (Ge), aluminum (Al), antimony (Sb), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), silver (Ag), chromium (Cr), cobalt (Co), or combinations thereof.

14. The device according to claim 11 , wherein the at least one secondary atom is selected from mercury (Hg).

Assignees

• Seagate Technology Llc

Inventors

• Zhao Tong
• Kautzky Michael C
• Sahoo Sarbeswar
• Brons Justin
• Gong Jie
• Cheng Yuhang

Classifications

• C23C14/582

  using electron bombardment · 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

• G11B5/3143

  including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding (G11B5/3116, G11B5/312 take precedence) · CPC title

• C23C14/5806 Primary

  Thermal treatment · CPC title

• G11B5/3163

  Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers · CPC title