Magnetic recording head front shield formation

Patent metadata

Field	Value
Publication number	US-9640204-B2
Application number	US-201615338729-A
Country	US
Kind code	B2
Filing date	Oct 31, 2016
Priority date	Sep 30, 2015
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

Implementations disclosed herein provide an apparatus comprising a write pole, and a two-layer front shield formed on the write pole, the front shield comprising, a first dielectric material formed on the first layer of the front shield, an active shield control (ASC) device formed between the two layers of the front shield on the first dielectric material configured to synchronize the response to a magnetomotive force (MMF) of a write pole and the front shield, and a second dielectric material formed on the ASC device, wherein the second layer of the front shield is formed only on top of the second dielectric material and the first layer of the front shield.

First claim

What is claimed is:

1. An apparatus comprising:
a write pole; and
a two-layer front shield formed on the write pole, the front shield comprising;
a first dielectric material formed on a first layer of the front shield;
an active shield control (ASC) device formed between the two layers of the front shield on the first dielectric material configured to synchronize the response to a magnetomotive force (MMF) of the write pole and the front shield; and

a second dielectric material formed on the ASC device, wherein a second layer of the front shield is formed only on top of the second dielectric material and the first layer of the front shield.

2. The apparatus of claim 1 , wherein the ASC device is a copper wire.

3. The apparatus of claim 2 , wherein the width of the copper wire is approximately 10 nm-1 um.

4. The apparatus of claim 1 , wherein the first dielectric material includes at least one of Al 2 O 3 and SiO 2 .

5. The apparatus of claim 1 , wherein the second dielectric material includes at least one of Al 2 O 3 and SiO 2 .

6. The apparatus of claim 1 , wherein the two-layer front shield materials include Ni 1-x Fe x and Cox(Ni y Fe1 -y ) 1-x .

7. The apparatus of claim 1 , further comprising a third dielectric material formed on the write pole adjacent to the first layer of the front shield.

8. The apparatuses of claim 7 , further comprising a fourth dielectric material formed on the third dielectric material adjacent to the second layer of the front shield.

9. A recording head comprising:
a two-layer front shield formed on a write pole in the recording head, the front shield comprising;
a first dielectric material formed on a first layer of the front shield;
an active shield control (ASC) device formed between the two layers of the front shield on the first dielectric material configured to synchronize the response to a magnetomotive force (MMF) of the write pole and the front shield; and
a second dielectric material formed on the ASC device, wherein a second layer of the front shield is formed directly on top of the second dielectric material and the first layer of the front shield.

10. The recording head of claim 9 , wherein the ASC device is a copper wire.

11. The recording head of claim 10 , wherein the width of the copper wire is approximately 10 nm-1 um.

12. The recording head of claim 9 , wherein the first dielectric material includes at least one of Al 2 O 3 and SiO 2 .

13. The recording head of claim 9 , wherein the two-layer front shield materials include Ni 1-x Fe x and Co x (niyFe 1-y ) 1-x .

14. The recording head of claim 9 , further comprising a third dielectric material formed on the write pole adjacent to the first layer of the front shield.

15. The recording head of claim 14 , further comprising a fourth dielectric material formed on the third dielectric material adjacent to the second layer of the front shield.

16. An apparatus comprising:
a write pole; and
a two-layer front shield formed in a magnetic recording head, the front shield comprising:
a first layer of the front shield;
a first alumina formed on the first layer of the front shield;
an active shield control (ASC) device formed on the first alumina, the ASC device including a copper wire and configured to synchronize the response to a magnetomotive force (MMF) of the write pole and the front shield;
a second alumina formed on the copper wire; and
a second layer of the front shield formed directly on top of the second alumina and the first layer of the front shield.

17. The apparatus of claim 16 , wherein the width of the copper wire is approximately 10 m-1 um.

18. The apparatus of claim 16 , wherein the two-layer front shield materials include Ni 1-x Fe x and Co x (NiyFe 1-y ) 1-x .

Assignees

• Seagate Technology Llc

Inventors

• Zhang Xiaohong
• Tian Wei
• Shen Zhe
• Lin Dong
• Mundenar Joseph

Classifications

• G11B5/11 Primary

  Shielding of head against electric or magnetic fields · CPC title

• G11B5/3912 Primary

  Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields (G11B5/3916 takes precedence) · CPC title

• G11B5/1278

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

• G11B5/3146

  magnetic layers · 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