Dual writer head design

• US 9,773,517 B2
• Filed: 04/13/2015
• Issued: 09/26/2017
• Est. Priority Date: 11/24/2014
• Status: Active Grant

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Gao, Kaizhong, Gage, Edward, Yin, Huaqing, Chen, Yonghua
• Primary Examiner(s): Wong, K.
• Application Number:
  US14/685,417
• Publication Number:
  US 20160148629A1
• Time in Patent Office: 897 Days
• Field of Search: None
• CPC Class Codes: G11B 5/012 Recording on, or reproducing or erasing from, magnetic disks G11B17/00, G11B19/00 take precedence
• CPC Class Codes: G11B 5/1278 specially adapted for magnetisations perpendicular to the surface of the record carrier
• CPC Class Codes: G11B 5/3116 Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks G11B5/3113, G11B5/245 take precedence
• CPC Class Codes: G11B 5/4886 relative to rotating disc
• CPC Class Codes: G11B 5/4984 Structure of specially adapted switching heads G11B5/3958 takes precedence

Abstract

A storage device includes a transducer head with multiple write elements having write poles of different sizes. For example, the transducer head may include two write poles of different width configured to write to a same surface of a storage medium. A controller of the storage device is configured to selectively engage one of the multiple write elements to write data to the storage medium.

Claims

1. A storage device comprising:

a transducer head including;

two write elements with different write pole widths configured to write to a same surface of a storage medium, the two write elements each including a write coil; and

a common electrical ground that is electrically coupled to the write coil of each one of the two write elements; and

a controller configured to operate a first of the two write elements to write data at a first linear density and configured to operate a second of the two write elements to write data at a second different linear density.

2. The storage device of claim 1, wherein the transducer head further includes two heat elements sharing a common lead, each of the heat elements providing heat to a different one of the two write elements.

3. The storage device of claim 2, wherein the two write elements are each symmetric about a central axis when viewed from an air bearing surface (ABS) of a storage medium.

4. The storage device of claim 1, wherein the write elements operate independent of one another.

5. The storage device of claim 1, wherein the transducer head further comprises a single heat element configured to simultaneously heat both of the write elements.

6. The storage device of claim 1,

wherein the controller is configured to write data a first set of alternating data tracks with a first one of the two write elements and configured to write data to a second set of alternating data tracks with a second one of the two write elements.

7. The storage device of claim 1, wherein the two write elements are separated by a distance of less than about 50 microns and greater than about 10 microns.

8. A method comprising:

selecting one of two write elements on a transducer head to write data to a magnetic media, the two write elements having different write pole widths and each including a corresponding write coil attached to a common electrical ground; and

writing data at a first linear density with a first of the two write elements and writing data at a second different linear density with a second one the two write elements.

9. The method of claim 8, wherein the transducer head further comprises two heat elements sharing a common lead, the heat elements each configured to heat a different one of the two write elements.

10. The method of claim 9, wherein the heat elements are connected in series.

11. The method of claim 8, wherein the write elements operate independent of one another.

12. The method of claim 8, wherein the transducer head further comprises a single heat element configured to simultaneously heat each of the two write elements.

13. The method of claim 8, further comprising:

writing data a first set of alternating data tracks with a first one of the two write elements and writing data to a second set of alternating data tracks with a second one of the two write elements.

14. The method of claim 8, wherein the two write poles are separated by a distance of less than about 50 microns and greater than about 10 microns.

15. A storage device comprising:

a transducer head with two write elements having different write pole widths and each including a corresponding write coil attached to a common electrical ground; and

a controller to selectively engage one of the two write elements to record data of a write operation and to operate a first of the two write elements to write data at a first linear density and configured to operate a second of the two write elements to write data at a second different linear density.

16. The storage device of claim 15, further comprising:

a heat element configured to simultaneously heat and thermally expand each of the two write poles toward an air-bearing surface (ABS).

17. The storage device of claim 16, wherein the heat element further comprises at least two resistors connected in series.