Write head having beveled non-magnetic write gap seed layer

Patent metadata

Field	Value
Publication number	US-9761252-B2
Application number	US-201514839268-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Mar 12, 2013
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

An apparatus has a main pole layer of magnetic material, a second layer of magnetic material, a first gap layer of non-magnetic material between the main pole layer and the second layer of magnetic material, and a second gap layer of non-magnetic material disposed between the main pole layer and the second layer of magnetic material. The second gap layer of non-magnetic material can be directly adjacent to the second layer of magnetic material. In accordance with one embodiment, this allows the gap to serve as a non-magnetic seed for the second layer of magnetic material. A method of manufacturing such a device is also described.

First claim

What is claimed is:

1. A write head having an air-bearing surface, the write head comprising:
a main pole layer of magnetic material;
a second layer of magnetic material;
a write gap between the main pole layer and the second layer of magnetic material, the write gap having a beveled section extending to and non-perpendicular to the air-bearing surface (ABS) and a section extending to the beveled section and perpendicular to the ABS, each of the beveled section and the section comprising:
a first non-magnetic gap layer comprising a first material;
a second non-magnetic gap layer comprising a second material different than the first material; and
a non-magnetic seed layer comprising a third material different than the second material directly adjacent to the second layer of magnetic material.

2. The write head of claim 1 , wherein the second gap layer comprises Al 2 O 3 , Ru, NiRu, NiCr, or Cu.

3. The write head of claim 1 , wherein the seed layer comprises Al 2 O 3 , Ru, NiRu, NiCr, or Cu.

4. The write head of claim 1 , wherein the first gap layer comprises Al 2 O 3 , Ru, NiRu, NiCr, or Cu.

5. The write head of claim 1 , wherein the first gap layer and the seed layer are different materials.

6. The write head of claim 1 , wherein the second gap layer is Al 2 O 3 and the first gap layer and the seed layer comprise the same material comprising Ru, NiRu, NiCr, or Cu.

7. The write head of claim 6 , wherein the second gap layer is Al 2 O 3 and the first gap layer and the seed layer are Ru.

8. The write head of claim 1 , wherein a magnetic moment on a first side of the write gap and a magnetic moment on a second side of the write gap are substantially equivalent.

9. The write head of claim 1 , wherein the second layer of magnetic material comprises 2.4T FeCo.

10. The write head of claim 1 , wherein the main pole layer comprises FeCo.

11. A write head having an air-bearing surface, the write head comprising:
a main pole layer of magnetic material;
a second layer of magnetic material;
a write gap between the main pole layer and the second layer of magnetic material, the write gap extending to and non-perpendicular to the air-bearing surface (ABS) at the ABS, the write gap comprising:
a first non-magnetic gap layer comprising Ru directly adjacent to the main pole;
a second non-magnetic gap layer; and
a non-magnetic seed layer directly adjacent to the second layer of magnetic material, all of the first non-magnetic gap layer, the second non-magnetic gap layer, and the seed layer extending to the ABS.

12. The write head of claim 11 , wherein the second gap layer comprises Al 2 O 3 , Ru, NiRu, NiCr, or Cu, and the seed layer comprises Al 2 O 3 , Ru, NiRu, NiCr, or Cu, where the second gap layer and the seed layer are different materials.

13. The write head of claim 11 , wherein the second gap layer is Al 2 O 3 and the seed layer comprises Ru, NiRu, NiCr, or Cu.

14. The write head of claim 13 , wherein the second gap layer is Al 2 O 3 and the seed layer is Ru.

15. The write head of claim 11 , wherein the first non-magnetic gap layer and the seed layer comprise Ru, and the second non-magnetic gap layer comprises a different material.

16. The write head of claim 11 , wherein the second layer of magnetic material comprises 2.4T FeCo.

17. The write head of claim 11 , wherein the main pole layer comprises FeCo.

18. A write head having an air-bearing surface, the write head comprising:
a main pole layer of magnetic material;
a second layer of magnetic material;
a write gap between the main pole layer and the second layer of magnetic material, the write gap extending to and non-perpendicular to the air-bearing surface (ABS) at the ABS, the write gap comprising:
a first non-magnetic gap layer comprising Ru directly adjacent to the main pole; and
a second non-magnetic gap layer comprising Al 2 O 3 directly adjacent to the first non-magnetic gap layer, each of the first non-magnetic gap layer and the second non-magnetic gap layer extending to the ABS.

19. The write head of claim 18 , wherein the write gap further comprises a non-magnetic seed layer between the second non-magnetic gap layer and the second layer of magnetic material.

20. The write head of claim 19 , wherein the non-magnetic seed layer is directly adjacent to the second non-magnetic gap layer and to the second layer of magnetic material.

Assignees

• Seagate Technology Llc

Inventors

• Tian Wei
• Inturi Venkateswara Rao
• Lin Dong
• Yin Huaqing
• Qiu Jiaoming

Classifications

• 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

• G11B5/3163

  Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers · CPC title

• G11B5/6082

  Design of the air bearing surface · CPC title

• Y10T428/115

  Magnetic layer composition · CPC title

• G11B5/232

  Manufacture of gap · CPC title