Recording head including NFT and heatsink

Patent metadata

Field	Value
Publication number	US-8934198-B2
Application number	US-201314062651-A
Country	US
Kind code	B2
Filing date	Oct 24, 2013
Priority date	Feb 23, 2010
Publication date	Jan 13, 2015
Grant date	Jan 13, 2015

Abstract

An apparatus including a near field transducer positioned adjacent to an air bearing surface, the near field transducer comprising silver (Ag) and at least one other element or compound; a first magnetic pole; and a heat sink positioned between the first magnetic pole and the near field transducer, wherein the heat sink includes: rhodium (Rh) or an alloy thereof; ruthenium (Ru) or an alloy thereof; titanium (Ti) or an alloy thereof; tantalum (Ta) or an alloy thereof; tungsten (W) or an alloy thereof; borides; nitrides; transition metal oxides; or palladium (Pd) or an alloy thereof.

First claim

What is claimed is:

1. An apparatus comprising:
a near field transducer positioned adjacent to an air bearing surface, the near field transducer comprising silver (Ag) and at least one other element or compound, wherein the at least one other element or compound is selected from:
copper (Cu), palladium (Pd), gold (Au), zirconium (Zr), platinum (Pt), geranium (Ge), nickel (Ni), tungsten (W), cobalt (Co), rhodium (Rh), ruthenium (Ru), tantalum (Ta), chromium (Cr), aluminum (Al), vanadium (V), iridium (Ir), titanium (Ti), magnesium (Mg), iron (Fe), molybdenum (Mo), silicon (Si), or combinations thereof;
oxides of V, Zr, Mg, calcium (Ca), Al, Ti, Si, cesium (Ce), yttrium (Y), Ta, W or thorium (Th), Co, or combinations thereof; or
nitrides of Ta, Al, Ti, Si, indium (In), Fe, Zr, Cu, W, boron (B), halfnium (Hf), or combinations thereof;

a first magnetic pole; and
a heat sink positioned between the first magnetic pole and the near field transducer, wherein the heat sink comprises:
rhodium (Rh) or an alloy thereof; ruthenium (Ru) or an alloy thereof; titanium (Ti) or an alloy thereof; tantalum (Ta) or an alloy thereof; tungsten (W) or an alloy thereof; borides; nitrides; transition metal oxides; or palladium (Pd) or an alloy thereof.

2. The apparatus according to claim 1 , wherein the heat sink provides a diffusion barrier between the near field transducer and the first magnetic pole.

3. The apparatus according to claim 1 , wherein the heat sink comprises Rh, W, or TiN.

4. The apparatus according to claim 1 , wherein the first magnetic pole comprises one of: Co, Fe, Ni, or alloys containing Co, Fe, and/or Ni.

5. The apparatus according to claim 1 , wherein the near field transducer comprises an antenna.

6. The apparatus according to claim 1 , wherein the heat sink has a bilayer structure.

7. The apparatus according to claim 1 , wherein the near field transducer comprises an alloy of silver (Ag) and at least one of copper (Cu) or palladium (Pd).

8. The apparatus according to claim 1 , wherein the alloy comprises about 5 atomic percent to about 15 atomic percent of the at least one secondary element.

9. An apparatus comprising:
a near field transducer positioned adjacent to an air bearing surface of the apparatus the near field transducer comprising silver (Ag) and at least one other element or compound, wherein the at least one other element or compound is selected from:
copper (Cu), palladium (Pd), gold (Au), zirconium (Zr), platinum (Pt), geranium (Ge), nickel (Ni), tungsten (W), cobalt (Co), rhodium (Rh), ruthenium (Ru), tantalum (Ta), chromium (Cr), aluminum (Al), vanadium (V), iridium (Ir), titanium (Ti), magnesium (Mg), iron (Fe), molybdenum (Mo), silicon (Si), or combinations thereof;
oxides of V, Zr, Mg, calcium (Ca), Al, Ti, Si, cesium (Ce), yttrium (Y), Ta, W or thorium (Th), Co, or combinations thereof; or
nitrides of Ta, Al, Ti, Si, indium (In), Fe, Zr, Cu, W, boron (B), halfnium (Hf), or combinations thereof, and
wherein the near field transducer comprises a disk and a peg, wherein the peg extends from the disk portion to the air bearing surface of the apparatus;

a first magnetic pole;
a heat sink positioned between the first magnetic pole and the near field transducer; and
a diffusion barrier positioned between the near field transducer and the heat sink, the diffusion barrier comprising rhodium (Rh) or an alloy thereof; ruthenium (Ru) or an alloy thereof; titanium (Ti) or an alloy thereof; tantalum (Ta) or an alloy thereof; tungsten (W) or an alloy thereof; borides; nitrides; transition metal oxides; or palladium (Pd) or an alloy thereof.

10. The apparatus according to claim 9 , wherein the diffusion barrier is positioned between the disk portion of the NFT and the heat sink.

11. The apparatus according to claim 9 , wherein the heat sink comprises Rh, W, or TiN.

12. The apparatus according to claim 9 , wherein the near field transducer comprises an alloy of silver (Ag) and at least one of copper (Cu) or palladium (Pd).

13. The apparatus according to claim 9 , wherein the alloy comprises about 5 atomic percent to about 15 atomic percent of the at least one secondary element.

14. An apparatus comprising:
a near field transducer positioned adjacent to an air bearing surface, near field transducer comprising silver (Ag) and at least one other element or compound, wherein the at least one other element or compound is selected from:
copper (Cu), palladium (Pd), gold (Au), zirconium (Zr), platinum (Pt), geranium (Ge), nickel (Ni), tungsten (W), cobalt (Co), rhodium (Rh), ruthenium (Ru), tantalum (Ta), chromium (Cr), aluminum (Al), vanadium (V), iridium (Ir), titanium (Ti), magnesium (Mg), iron (Fe), molybdenum (Mo), silicon (Si), or combinations thereof;
oxides of V, Zr, Mg, calcium (Ca), Al, Ti, Si, cesium (Ce), yttrium (Y), Ta, W or thorium (Th), Co, or combinations thereof; or
nitrides of Ta, Al, Ti, Si, indium (In), Fe, Zr, Cu, W, boron (B), halfnium (Hf), or combinations thereof, and
wherein the near field transducer comprises an antenna;

a first magnetic pole;
a heat sink positioned between the first magnetic pole and the near field transducer; and
a diffusion barrier positioned between the near field transducer and the first magnetic pole, the diffusion barrier comprising rhodium (Rh) or an alloy thereof; ruthenium (Ru) or an alloy thereof; titanium (Ti) or an alloy thereof; tantalum (Ta) or an alloy thereof; tungsten (W) or an alloy thereof; borides; nitrides; transition metal oxides; or palladium (Pd) or an alloy thereof.

15. The apparatus according to claim 14 , wherein the diffusion barrier is spaced from the air bearing surface.

16. The apparatus according to 14 , wherein the diffusion barrier comprises a multilayer structure.

17. The apparatus according to claim 14 , wherein the diffusion barrier comprises Rh, W, or TiN.

18. The apparatus according to claim 14 , wherein the diffusion barrier comprises a nitride.

19. The apparatus according to claim 14 , wherein the near field transducer comprises an alloy of silver (Ag) and at least one of copper (Cu) or palladium (Pd).

20. The apparatus according to claim 14 , wherein the alloy comprises about 5 atomic percent to about 15 atomic percent of the at least one secondary element.

Assignees

• Seagate Technology Llc

Inventors

• Zou Jie
• Gao Kaizhong
• Challener William Albert
• Ostrowski Mark Henry
• Inturi Venkateswara Rao
• Zhao Tong
• Kautzky Michael Christopher

Classifications

• G11B5/3133 Primary

  including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure (G11B5/3106 takes precedence) · CPC title

• G11B33/144 Primary

  by detection, control, regulation of the temperature · CPC title

• G11B5/3136

  for reducing the pole-tip-protrusion at the head transducing surface, e.g. caused by thermal expansion of dissimilar materials · 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

• G11B5/3106

  where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination (G11B5/3133 takes precedence) · CPC title