Wire-assisted magnetic write device with low power consumption

• US 8,339,736 B2
• Filed: 06/20/2007
• Issued: 12/25/2012
• Est. Priority Date: 06/20/2007
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Gao, Kaizhong, Mao, Sining, Linville, Eric S., Feng, Xuebing, Li, Shaoping, Bozeman, Steven Paul
• Primary Examiner(s): Renner, Craig A.
• Assistant Examiner(s): Polo, Gustavo
• Application Number:
  US11/820,703
• Publication Number:
  US 20080316631A1
• Time in Patent Office: 2,015 Days
• Field of Search: 36012301-12361
• US Class Current: 360/123.06
• CPC Class Codes: G11B 2005/0002 Special dispositions or recording techniques
• CPC Class Codes: G11B 5/02 Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
• CPC Class Codes: G11B 5/1278 specially adapted for magnetisations perpendicular to the surface of the record carrier
• CPC Class Codes: G11B 5/3123 by using special coil configurations or conductors
• CPC Class Codes: G11B 5/3133 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

Abstract

A magnetic device includes a write element having a write element tip and a conductive coil that carries current to induce a first field in the write element. A first conductor is proximate a leading edge of the write pole tip for carrying current to generate a second field that augments the first field.

Claims

1. A magnetic device comprising:

a write element including a write pole tip;

a conductive coil to carry a current to induce a magnetic first field through the write pole tip to an adjacent storage medium; and

a first conductor connected to and is an extension of the conductive coil, located proximate the write pole tip at a medium confronting surface and being an approximately equal distance away from the adjacent storage medium as the write pole tip, and configured to carry current parallel to the medium confronting surface to generate a second field that augments the first field, the second field orientated the same as the first field at a location adjacent to the pole tip and the medium confronting surface; and

a second conductor proximate a trailing edge of the write pole tip for carrying current parallel to the medium confronting surface to generate a third field that extends beyond the medium confronting surface to the location adjacent to the pole tip and that augments the first field generated by the write pole during a write operation, wherein the write pole tip is between the first conductor and the second conductor.

2. The magnetic device of claim 1, wherein the second conductor is connected to and extends from the conductive coil.

3. The magnetic device of claim 1, and further comprising:

a return element magnetically coupled to the write element.

4. The magnetic device of claim 3, and further comprising:

a shield extending from the return element toward the write pole tip.

5. The magnetic device of claim 1, and further comprising:

a cladding layer on at least one external surface of the first conductor, wherein the cladding layer comprises a magnetic material.

6. A magnetic writer comprising:

a write element that generates a write field at a front surface, wherein the write field extends beyond and perpendicular to the front surface into a storage medium at a location adjacent to a tip of the write element;

a conductive coil to carry a current to induce the write field in the write element;

a return element magnetically coupled to the write element on a trailing side of the write element; and

a first conductor connected to and is an extension of the conductive coil, located proximate a leading side of the write element at the front surface and being an approximately equal distance away from the storage medium as the tip of the write element, for carrying current parallel to the front surface to generate an assist field that augments the write field beyond the front surface into the storage medium at the location adjacent to the tip of the write element, wherein the write field and the assist field are oriented the same at the location adjacent to the tip of the write element;

wherein a cross-sectional area of the first conductor proximate the leading side of the write element is smaller than a cross-sectional area of the conductive coil at a location away from the front surface; and

a second conductor proximate the trailing side; and

of the write element for carrying current parallel to the front surface to generate a second assist field that augments the write field beyond the front surface into the storage medium at the location adjacent to the tip of the write element and that augments the write field during a write operation, wherein the tip of the write element is between the first conductor and the second conductor.

7. The magnetic writer of claim 6, wherein the conductor coil is recessed from the front surface.

8. The magnetic writer of claim 6, wherein the second conductor on the trailing side of the write element proximate the front surface has a smaller cross-sectional area than any remaining turns of the conductive coil.

9. The magnetic writer of claim 6, and further comprising:

a shield extending from the return element toward the write element proximate the front surface.

10. The magnetic writer of claim 6, and further comprising:

a cladding layer on at least one external surface of the first conductor, wherein the cladding layer comprises a magnetic material.