Sliders having at least two regions on the trailing edge surface

Patent metadata

Field	Value
Publication number	US-9449630-B2
Application number	US-201514728291-A
Country	US
Kind code	B2
Filing date	Jun 2, 2015
Priority date	Jun 2, 2014
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A slider that includes a leading edge surface; a trailing edge surface; and an air bearing surface (ABS) positioned between the leading edge surface and the trailing edge surface, wherein the trailing edge surface includes a read-write element, at least one low surface energy region and at least one high surface energy region.

First claim

The invention claimed is:

1. A slider comprising:
a leading edge surface;
a trailing edge surface having a central region and two opposing outer regions; and
an air bearing surface (ABS) positioned between the leading edge surface and the trailing edge surface,
wherein the trailing edge surface comprises a read-write element in the central region, at least one low surface energy region and at least one high surface energy region configured to form a surface energy gradient from the central region to the two opposing outer regions.

2. The slider according to claim 1 , wherein the at least one region of low surface energy and the at least one region of high surface energy form a pattern.

3. The slider according to claim 1 , wherein the at least one low surface energy region and the at least one high surface energy region comprises coatings of materials.

4. The slider according to claim 3 , wherein at least one of the low surface energy region or the high surface energy region comprises self assembled monolayers (SAMs).

5. The slider according to claim 3 , wherein the at least one low surface energy region comprises a coating of a hydrophobic material.

6. The slider according to claim 5 , wherein the hydrophobic material comprises fluorine.

7. The slider according to claim 3 , wherein the at least one low surface energy region comprises a coating of an oleophobic material.

8. The slider according to claim 1 , wherein the at least one low surface energy region and the at least one high surface energy region are configured to drive droplets of lubricant/contaminants away from the ABS.

9. The slider according to claim 1 , wherein the at least one low surface energy region and the at least one high surface energy region are configured to drive droplets of lubricant/contaminants along the trailing edge surface towards the outer edges thereof.

10. The slider according to claim 1 , wherein the at least one low surface energy region and the at least one high surface energy region are configured to drive droplets of lubricant/contaminants away from the ABS and along the trailing edge surface towards the outer edges thereof.

11. The slider according to claim 1 , wherein the at least one region of low surface energy is disposed directly adjacent to the ABS.

12. The slider according to claim 1 further comprising at least one region of mid surface energy.

13. The slider according to claim 12 , wherein the high surface energy region comprises nitrogenated-diamond like carbon (N-DLC), the mid surface energy region comprises diamond like carbon (DLC), and the low surface energy region comprises fluorinated-diamond like carbon (F-DLC).

14. The slider according to claim 1 , wherein the high surface energy regions, low surface energy regions, or combinations thereof form an array of micro-pillars.

15. The slider according to claim 1 , wherein the at least one low surface energy region and the least one high surface energy region are configured to cause droplets of lubricant to preferentially flow from the central region to the outer regions of the trailing edge.

16. A slider comprising:
a leading edge surface;
a trailing edge surface having a central region and two opposing outer regions; and
an air bearing surface (ABS) positioned between the leading edge surface and the trailing edge surface,
wherein the trailing edge surface comprises a read-write element in the central region, at least one low surface energy region coating and at least one high surface energy region coating configured to form a surface energy gradient from the central region to the two opposing outer regions.

17. The slider according to claim 16 , wherein at least one of the low surface energy region coating or the high surface energy region coating comprises self assembled monolayers (SAMs).

18. The slider according to claim 16 , wherein the at least one low surface energy region comprises a coating of a hydrophobic material.

19. The slider according to claim 18 , wherein the hydrophobic material comprises fluorine.

20. The slider according to claim 16 , wherein the at least one low surface energy region comprises a coating of an oleophobic material.

Assignees

• Seagate Technology Llc

Inventors

• Rajasekharan Ajaykumar
• Kunkel Gary J
• Ellison David J
• Ramakrishnan Narayanan

Classifications

• G11B5/4813 Primary

  Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm (G11B5/484 takes precedence) · CPC title

• G11B5/6082 Primary

  Design of the air bearing surface · CPC title