Single coil turn data writer

Patent metadata

Field	Value
Publication number	US-9697852-B2
Application number	US-201514934926-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 6, 2015
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A data writer may be configured with at least a write pole continuously extending from an air bearing surface to a via. The write pole can contact at least one yoke that contacts the write pole. The write pole and yoke may each be disposed between and separated from a write coil that has a single turn and continuously extends to opposite sides of the write pole.

First claim

What is claimed is:

1. An apparatus comprising a write pole continuously extending from a write pole tip at an air bearing surface (ABS) to a via, the write pole tip extending from a first width of a first tapered portion on the ABS to a second tapered portion, the first tapered portion having a first varying width and the second tapered portion having a second varying width, the write pole having a write pole tip disposed between and separated from a write coil having a single turn and continuously extending to opposite sides of the write pole, the second tapered portion aligned with the write coil.

2. The apparatus of claim 1 , wherein the write coil is separated from the ABS by a common distance on the opposite sides of the write pole.

3. The apparatus of claim 1 , wherein the write coil has a cross-sectional aspect ratio with a greater height than width, the height measured parallel to the ABS and the width measured perpendicular to the ABS.

4. The apparatus of claim 1 , wherein the write coil has a cross-sectional aspect ratio with a greater width than height, the height measured parallel to the ABS and the width measured perpendicular to the ABS.

5. The apparatus of claim 1 , wherein the first varying width is less than the second varying width.

6. An apparatus comprising a write pole continuously extending from an air bearing surface (ABS) to a via, the write pole contacting top and bottom yokes respectively positioned on opposite sides of the write pole, the write pole and yokes disposed between and separated from a write coil having a single turn and continuously extending to opposite sides of the write pole, a front edge of each yoke aligned with a front edge of the write coil along a plane parallel to the ABS, the write coil aligned with a transition in a paddle portion of the write pole from a first varying width to a second varying width.

7. The apparatus of claim 6 , wherein the top and bottom yokes each continuously extend from the via.

8. The apparatus of claim 6 , wherein the top and bottom yokes have a lower magnetic moment than the write pole.

9. The apparatus of claim 6 , wherein the write coil is separated from each yoke by 200 nm or less.

10. The apparatus of claim 6 , wherein each yoke has a core length of 2.5 micrometers or less, the core length measured from a front edge of each yoke to the via perpendicular to the ABS.

11. The apparatus of claim 6 , wherein the write pole tapers from each yoke to a write pole tip.

12. The apparatus of claim 6 , wherein the front edge of each yoke and the front edge of the write coil each face the ABS.

13. The apparatus of claim 12 , wherein the front edges of the yokes and write coil are separated from the ABS by 0.7-1.1 micrometers.

14. An apparatus comprising a write pole continuously extending from an air bearing surface (ABS) to a via, a top return pole continuously extending from the ABS proximal the write pole to the via, the write pole disposed between and separated from a write coil positioned between the top return pole and write pole, the write coil having a single turn and continuously extending to opposite sides of the write pole, the write coil aligned with a transition in a paddle portion of the write pole from a first varying width to a second varying width.

15. The apparatus of claim 14 , wherein the write pole is disposed between top and bottom return poles on the ABS.

16. The apparatus of claim 15 , wherein the top return pole has a different shape than the bottom return pole.

17. The apparatus of claim 14 , wherein the paddle portion of the write pole comprises first, second, and third tapered portions each with varying lengths as measured perpendicular to the ABS.

18. The apparatus of claim 17 , wherein the respective tapered portions decrease towards the write pole.

19. The apparatus of claim 17 , wherein the third tapered portion is oriented parallel to the first portion, the third portion separated from a write pole tip by the first portion.

20. The apparatus of claim 14 , wherein the top return pole has a greater height on the ABS than the write pole.

Assignees

• Seagate Technology Llc

Inventors

• Xue Jianhua
• Wang Debin
• Yin Huaqing
• Wolf John M
• Hutchinson Erik J
• Tian Wei
• Chen Yonghua

Classifications

• G11B5/6082

  Design of the air bearing surface · CPC title

• G11B5/17 Primary

  Construction or disposition of windings · CPC title

• G11B5/1278

  specially adapted for magnetisations perpendicular to the surface of the record carrier · CPC title

• G11B5/3116

  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 title

• G11B5/3123

  by using special coil configurations or conductors · CPC title