Magnetic adhesion layer and method of forming same

Patent metadata

Field	Value
Publication number	US-9570101-B2
Application number	US-201314011877-A
Country	US
Kind code	B2
Filing date	Aug 28, 2013
Priority date	Aug 28, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A device having an air bearing surface and a method of forming the device are disclosed. The device can include a writer portion including a surface at the air bearing surface of the device, a magnetic adhesion layer disposed proximate at least a portion of the surface of the writer portion, and an overcoat disposed proximate at least a portion of the magnetic adhesion layer such that the magnetic adhesion layer is between the at least a portion of the surface of the writer portion and the overcoat.

First claim

What is claimed is:

1. A device having an air bearing surface, the device comprising:
a writer portion comprising a surface at the air bearing surface of the device;
a magnetic adhesion layer disposed proximate at least a portion of the surface of the writer portion, wherein the magnetic adhesion layer comprises a material having a magnetic moment of at least about 0.1 T and no greater than about 2.4 T; and
an overcoat disposed proximate at least a portion of the magnetic adhesion layer such that the magnetic adhesion layer is between the at least a portion of the surface of the writer portion and the overcoat.

2. The device of claim 1 , wherein the magnetic adhesion layer is disposed on substantially all of the surface of the writer portion.

3. The device of claim 1 further comprising a reader portion comprising a surface at the air bearing surface, wherein the overcoat is also disposed proximate at least a portion of the surface of the reader portion.

4. The device of claim 1 , wherein the magnetic adhesion layer comprises a thickness of at least about 4 angstroms and no greater than about 12 angstroms.

5. The device of claim 1 , wherein the overcoat comprises a material that is electrically insulating.

6. The device of claim 1 , further comprising a near field transducer.

7. The device of claim 6 , wherein the overcoat comprises a material that has a refractive index at 830 nm of at least about 2.09.

8. The device of claim 6 , wherein the overcoat comprises a material that has an extinction coefficient at 830 nm of about 0 and no greater than about 0.21.

9. The device claim 1 , wherein the magnetic adhesion layer comprises a material chosen from mixtures of ferromagnetic material and insulating materials; semiconductors doped with magnetic materials; ferrites; two phase materials; atomic level bilayers or multilayers; grade layers of materials; or partially oxidized ferromagnetic materials or ferromagnetic materials; and exotic materials.

10. The device of claim 1 , wherein the magnetic adhesion layer comprises CoFeNi.

11. The device of claim 1 , wherein the overcoat is disposed proximate substantially all of the air bearing surface of the device.

12. A system, comprising:
the device of claim 1 ; and
magnetic media proximate the air bearing surface of the device.

13. A method, comprising:
forming a device having an air bearing surface, wherein the device comprises a writer portion comprising a surface at the air bearing surface of the device;
forming a magnetic adhesion layer on at least a portion of the surface of the writer portion, wherein the magnetic adhesion layer comprises a material having a magnetic moment of at least about 0.1 T and no greater than about 2.4 T; and
forming an overcoat on at least a portion of the magnetic adhesion layer such that the magnetic adhesion layer is between the at least a portion of the surface of the writer portion and the overcoat.

14. The method of claim 13 , wherein forming the magnetic adhesion layer comprises forming the magnetic adhesion layer on substantially all of the surface of the writer portion.

15. The method of claim 13 , further comprising forming a reader portion comprising a surface at the air bearing surface, wherein forming the overcoat further comprises forming the overcoat on at least a portion of the surface of the reader portion.

16. The method of claim 13 , wherein the magnetic adhesion layer comprises a thickness of at least about 4 angstroms and no greater than about 12 angstroms.

17. The method of claim 13 , wherein forming the device further comprises forming a near field transducer proximate the writer portion.

18. The method of claim 13 , wherein forming the overcoat further comprises forming the overcoat on substantially all of the air bearing surface of the device.

Assignees

• Seagate Technology Llc

Inventors

• Wierman Kurt W

Classifications

• G11B2005/0021

  Thermally assisted recording using an auxiliary energy source for heating the recording layer locally to assist the magnetization reversal · CPC title

• G11B5/72

  Protective coatings, e.g. anti-static {or antifriction} · CPC title

• G11B5/65

  characterised by its composition (G11B5/66 takes precedence) · CPC title

• G11B5/3146

  magnetic layers · CPC title

• G11B5/3106

  where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination (G11B5/3133 takes precedence) · CPC title