IP Library Granted Patent US 8,451,555
Granted Patent B2
US 8,451,555 · App. 12/391,326 · Granted May 28, 2013

Recording head for heat assisted magnetic recording

Inventors: Michael Allen Seigler (Pittsburgh, PA); Mark William Covington (Edina, MN); Michael Leigh Mallary (Harmony, PA); Hua Zhou (Pittsburgh, PA); Amit Vasant Itagi (Seven Fields, PA)
Assignee: Seagate Technology LLC
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Quick Facts
Patent No.
US 8,451,555
App. No.
12/391,326
Granted
May 28, 2013
Kind
B2
Abstract

An apparatus includes a waveguide having a core layer and an end adjacent to an air bearing surface, first and second poles magnetically coupled to each other and positioned on opposite sides of the waveguide, wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion toward the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the core layer of the waveguide than the first portion, and a heat sink positioned adjacent to the second portion of the first pole.

Claims (29)

1. An apparatus comprising:

first and second poles magnetically coupled to each other and positioned on opposite sides of a waveguide; and

a near-field transducer (NFT) adjacent to the waveguide and a heat sink positioned adjacent the NFT and capable of cooling the NFT.

2. The apparatus of claim 1 , wherein the near-field transducer comprises a disk and a peg positioned between the disk and an air bearing surface, and the heat sink makes contact with the disk.

3. The apparatus of claim 2 , wherein a region of contact between the heat sink and the disk is spaced from an edge of the disk.

4. The apparatus of claim 1 , wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion toward the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the core layer of the waveguide than the first portion.

5. The apparatus of claim 1 , wherein the heat sink comprises a thermally conductive dielectric material.

6. An apparatus comprising:

first and second poles magnetically coupled to each other and positioned on opposite sides of a waveguide;

a near-field transducer positioned adjacent to the waveguide; and

a heat sink positioned adjacent the near-field transducer and capable of cooling the near-field transducer.

7. The Apparatus of claim 6 , wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion toward the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the core layer of the waveguide than the first portion and wherein the heat sink is positioned between the near-field transducer and the second portion of the first pole.

8. The apparatus of claim 6 , wherein the near-field transducer comprises a disk and a peg positioned between the disk and an air bearing surface.

9. The apparatus of claim 8 , wherein the heat sink makes contact with the disk.

10. The apparatus of claim 6 , wherein the heat sink is thermally connected with the first pole.

11. The apparatus of claim 6 wherein the heat sink comprises diamond like carbon (DLC material).

12. The apparatus of claim 6 , wherein the heat sink comprises a thermally conductive dielectric material.

13. An apparatus comprising:

a waveguide having a core layer and an end adjacent to an air bearing surface;

a near-field transducer positioned adjacent to a focal point of the waveguide;

a heat sink positioned adjacent the near-field transducer, wherein the heat sink is capable of cooling the near-field transducer; and

first and second poles magnetically coupled to each other and positioned on opposite sides of the waveguide.

14. The apparatus of claim 13 , wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion toward the air bearing surface.

15. The apparatus of claim 14 , wherein the second portion being structured such that an end of the second portion is closer to the core layer of the waveguide than the first portion.

16. The apparatus of claim 14 , wherein the heat sink is positioned between the near-field transducer and the second portion of the first pole.

17. The apparatus of claim 13 , wherein the heat sink is made of at least one of Au, Cu, Al, and Ag.

18. The apparatus of claim 13 , wherein the wherein the near-field transducer comprises a disk and a peg positioned between the disk and the air bearing surface.

19. The apparatus of claim 18 , wherein the heat sink is parallel to the air bearing surface.

20. The apparatus of claim 13 , wherein the heat sink comprises a thermally conductive dielectric material.

Assignments (6)
RELEASE OF SECURITY INTEREST Recorded Jul 23, 2025
From: THE BANK OF NOVA SCOTIA
To: SEAGATE TECHNOLOGY PUBLIC LIMITED COMPANY; SEAGATE TECHNOLOGY; SEAGATE TECHNOLOGY HDD HOLDINGS; I365 INC.; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL; SEAGATE HDD CAYMAN; SEAGATE TECHNOLOGY (US) HOLDINGS, INC.
Reel/Frame 072193/0001 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENT RIGHTS Recorded Jul 19, 2013
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT AND SECOND PRIORITY REPRESENTATIVE
To: SEAGATE TECHNOLOGY LLC; EVAULT INC. (F/K/A I365 INC.); SEAGATE TECHNOLOGY INTERNATIONAL; SEAGATE TECHNOLOGY US HOLDINGS, INC.
Reel/Frame 030833/0001 →
SECURITY AGREEMENT Recorded Mar 24, 2011
From: SEAGATE TECHNOLOGY LLC
To: THE BANK OF NOVA SCOTIA, AS ADMINISTRATIVE AGENT
Reel/Frame 026010/0350 →
RELEASE Recorded Jan 19, 2011
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: SEAGATE TECHNOLOGY HDD HOLDINGS; MAXTOR CORPORATION; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL
Reel/Frame 025662/0001 →
SECURITY AGREEMENT Recorded May 15, 2009
From: MAXTOR CORPORATION; SEAGATE TECHNOLOGY LLC; SEAGATE TECHNOLOGY INTERNATIONAL
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT AND FIRST PRIORITY REPRESENTATIVE; WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT AND SECOND PRIORITY REPRESENTATIVE
Reel/Frame 022757/0017 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 24, 2009
From: SEIGLER, MICHAEL ALLEN; COVINGTON, MARK WILLIAM; MALLARY, MICHAEL LEIGH; ZHOU, HUA; ITAGI, AMIT VASANT
To: SEAGATE TECHNOLOGY LLC
Reel/Frame 022300/0413 →
Continuity (1)
Related Publication 20100214685A1 · Aug 26, 2010