Self-anneal process for a near field transducer and chimney in a hard disk drive assembly

• US 8,917,581 B1
• Filed: 01/17/2014
• Issued: 12/23/2014
• Est. Priority Date: 12/18/2013
• Status: Active Grant

• Current Assignee: JP Morgan Chase Bank, N.A. (JP Morgan Chase & Co)
• Original Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Inventors: Mallary, Michael L.
• Primary Examiner(s): HUBER, PAUL W
• Application Number:
  US14/158,754
• Time in Patent Office: 340 Days
• Field of Search: None
• US Class Current: 369/13.33
• CPC Class Codes: G11B 2005/0021 Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal
• CPC Class Codes: G11B 5/314 where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers G11B5/3196 takes precedence
• CPC Class Codes: G11B 5/3163 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 Class Codes: G11B 5/3173 Batch fabrication, i.e. producing a plurality of head structures in one batch
• CPC Class Codes: Y10T 428/1107 Magnetoresistive

Abstract

Articles of manufacture and methods of manufacturing such articles of manufacture are disclosed. The articles of manufacture may include a heat assisted magnetic recording (HAMR) transducer having a near field transducer (NFT) and a chimney thermally coupled to the NFT. The articles of manufacture may also include an electrical conductor having section with a reduced width that is thermally coupled to the chimney. The methods include applying an electrical current to the electrical conductor to generate heat in the section and annealing the chimney and the NFT from the heat generated.

Claims

1. An article of manufacture, comprising:

a heat assisted magnetic recording (HAMR) transducer comprising a near field transducer (NFT) and a chimney thermally coupled to the NFT; and

an electrical conductor arranged on the HAMR transducer, the electrical conductor having a section with a reduced width that is thermally coupled to the chimney.

2. The article of manufacture of claim 1, wherein the electrical conductor is configured to be coupled to an electrical current source, whereby the section of the electrical conductor generates heat.

3. The article of manufacture of claim 1, wherein the section of the electrical conductor is configured to thermally anneal the chimney.

4. The article of manufacture of claim 1, wherein the chimney is configured to thermally conduct heat to anneal the NFT.

5. The article of manufacture of claim 1, further comprising a peg arranged with the NFT, wherein the chimney is configured to thermally conduct heat to anneal the peg.

6. The article of manufacture of claim 1, wherein the section of the electrical conductor is further configured to thermally anneal the chimney at a temperature greater than 200°

C.

7. The article of manufacture of claim 1, wherein each of the electrical conductor, chimney, and NFT comprises at least one of gold, gold alloy, silver alloy, and copper alloy.

8. An article of manufacture comprising:

an array of heat assisted magnetic recording (HAMR) transducers, wherein each of the HAMR transducers comprises a near field transducer (NFT) and a chimney thermally coupled to the NFT; and

an array of electrical conductors arranged with the array of HAMR transducers, wherein each of the electrical conductors comprises a section with a reduced width that is thermally coupled to a respective one of the chimneys.

9. The article of manufacture of claim 8, wherein the array of electrical conductors are configured to be coupled to a source of current, whereby the sections of the electrical conductors generate heat.

10. The article of manufacture of claim 8, wherein each of the sections of the electrical conductors is configured to thermally anneal its respective corresponding chimneys.

11. The article of manufacture of claim 8, wherein each of the chimneys is configured to thermally conduct heat to anneal its respective NFT.

12. The article of manufacture of claim 8, wherein each of the HAMR transducers further comprises a peg arranged with the NFT, wherein the chimney is configured to thermally conduct heat to anneal the peg.

13. The article of manufacture of claim 8, wherein each of the sections of the electrical conductors is further configured to thermally anneal its respective chimney at a temperature greater than 200°

C.

14. The article of manufacture of claim 8, wherein each of the electrical conductors, chimneys, and NFTs comprises at least one of gold, gold alloy, silver alloy, and copper alloy.

15. A method of manufacturing an article of manufacture, wherein the article of manufacture comprises a heat assisted magnetic recording (HAMR) transducer having a near field transducer (NFT) and a chimney thermally coupled to the NFT, and wherein the article of manufacture further comprises an electrical conductor having a section with a reduced width that is thermally coupled to the chimney, the method comprising:

applying an electrical current to the electrical conductor to generate heat in the section; and

annealing the chimney and the NFT from the heat generated.

16. The method of claim 15, wherein the transducer comprises a peg arranged with the NFT, the method further comprising annealing the peg from the heat generated.

17. The method of claim 15, wherein the annealing comprises annealing the chimney and the NFT at a temperature greater than 200°

C.

18. The method of claim 15, wherein each of the electrical conductors, chimneys, and NFTs comprises at least one of gold, gold alloy, silver alloy, and copper alloy.

19. The method of claim 15, further comprising removing at least a portion of the electrical conductor after the annealing.

20. The method of claim 19, wherein the removing includes one or more of chemical mechanical polishing (CMP) and ion milling.

21. A method of manufacturing an article of manufacture, wherein the article of manufacture comprises an array of heat assisted magnetic recording (HAMR) transducers each having a near field transducer (NFT) and a chimney thermally coupled to the NFT, and wherein the article of manufacture further comprises an array of electrical conductors arranged with the array of HAMR transducers with each of the electrical conductors having a section with a reduced width that is thermally coupled to a respective one of the chimneys, the method comprising:

applying an electrical current to the electrical conductors to generate heat in their respective sections; and

annealing the chimneys and the NFTs from the heat generated.

22. The method of claim 21, wherein each of the HAMR transducers comprises a peg arranged with the NFT, the method further comprising annealing each of the pegs from the heat generated.

23. The method of claim 21, wherein the annealing comprises annealing the chimneys and NFTs at a temperature greater than 200°

C.

24. The method of claim 21, wherein each of the electrical conductors, chimneys, and NFTs comprises at least one of gold, gold alloy, silver alloy, and copper alloy.

25. The method of claim 21, further comprising removing at least a portion of the electrical conductors after the annealing.

26. The method of claim 25, wherein the removing includes one or more of chemical mechanical polishing (CMP) and ion milling.