Slider air-bearing surface designs with side particle-trapping structures

Patent metadata

Field	Value
Publication number	US-10249334-B1
Application number	US-201815908711-A
Country	US
Kind code	B1
Filing date	Feb 28, 2018
Priority date	Feb 28, 2018
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Disclosed herein are sliders with particle-trapping structures for trapping particles that could otherwise adversely affect the performance of a data storage device, and data storage devices comprising such sliders. A slider includes a leading edge, a trailing edge, a leading-edge structure located between the leading edge and the trailing edge, a vertical structure located between the leading-edge structure and the trailing edge, and a particle-trapping structure adjacent to the base of the vertical structure. The vertical structure has a leading-edge-facing surface, a side-edge-facing surface, and a base at a first level of an air-bearing surface (ABS) of the slider. The particle-trapping structure has a first portion adjacent to the leading-edge-facing surface and a second portion adjacent to the side-edge-facing surface. The particle-trapping structure comprises at least one cavity extending below the first level when the ABS is oriented upward.

First claim

We claim:

1. A slider, comprising:
a leading edge;
a trailing edge;
a leading-edge structure located between the leading edge and the trailing edge;
a vertical structure located between the leading-edge structure and the trailing edge, the vertical structure having a leading-edge-facing surface and a side-edge-facing surface, the vertical structure having a base at a first level of an air-bearing surface (ABS) of the slider; and
a particle-trapping structure adjacent to the base of the vertical structure, the particle-trapping structure having a first portion adjacent to the leading-edge-facing surface and a second portion adjacent to the side-edge-facing surface, wherein the particle-trapping structure comprises at least one cavity extending below the first level when the ABS is oriented upward.

2. The slider recited in claim 1 , wherein the particle-trapping structure abuts the base of the vertical structure.

3. The slider recited in claim 1 , wherein the first portion and the second portion intersect.

4. The slider recited in claim 1 , wherein a footprint of the particle-trapping structure is L-shaped.

5. The slider recited in claim 1 , wherein a depth of the first portion differs from a depth of the second portion.

6. The slider recited in claim 1 , wherein a depth of the first portion is substantially the same as a depth of the second portion.

7. The slider recited in claim 1 , wherein a floor of the particle-trapping structure is non-uniform.

8. The slider recited in claim 1 , wherein at least a portion of a floor of the particle-trapping structure is substantially flat.

9. The slider recited in claim 1 , wherein the vertical structure is a side pad.

10. The slider recited in claim 1 , wherein the particle-trapping structure is a first particle-trapping structure, and the at least one cavity is a first at least one cavity, and further comprising a second particle-trapping structure adjacent to a base of the leading-edge structure, wherein the second particle-trapping structure comprises a second at least one cavity extending below the first level.

11. The slider recited in claim 10 , wherein a depth of the first particle-trapping structure and a depth of the second particle-trapping structure are substantially identical.

12. The slider recited in claim 10 , wherein a depth of the first particle-trapping structure differs from a depth of the second particle-trapping structure.

13. The slider recited in claim 10 , wherein the second particle-trapping structure comprises a segmented structure.

14. A data storage device comprising the slider recited in claim 13 .

15. The slider recited in claim 1 , wherein the vertical structure is a first vertical structure, the leading-edge-facing surface is a first leading-edge-facing surface, the side-edge-facing surface is a first side-edge-facing surface, the particle-trapping structure is a first particle-trapping structure, and the at least one cavity is a first at least one cavity, and further comprising:
a second vertical structure with a second leading-edge-facing surface and a second side-edge-facing surface, the second vertical structure having a base at a second level of the ABS, wherein the second level is the same as or different from the first level; and
a second particle-trapping structure adjacent to a base of the second vertical structure, the second particle-trapping structure having a first portion adjacent to the second leading-edge-facing surface and a second portion adjacent to the second side-edge-facing surface, wherein the second particle-trapping structure comprises a second at least one cavity extending below the second level.

16. The slider recited in claim 15 , wherein the second vertical structure is located between the leading-edge structure and the trailing edge.

17. The slider recited in claim 15 , wherein a depth of the first particle-trapping structure and a depth of the second particle-trapping structure are substantially identical.

18. The slider recited in claim 15 , wherein a depth of the first particle-trapping structure differs from a depth of the second particle-trapping structure.

19. The slider recited in claim 15 , wherein a footprint of the first particle-trapping structure and a footprint of the second particle-trapping structure are substantially similar.

20. The slider recited in claim 15 , wherein a footprint of the first particle-trapping structure differs from a footprint of the second particle-trapping structure.

21. The slider recited in claim 1 , wherein the particle-trapping structure comprises a segmented structure, the segmented structure comprising at least a first particle trapping segment, a second particle-trapping segment, and a gap disposed between the first and second particle-trapping segments, wherein, when the ABS of the slider is oriented upward:
a level of the first particle-trapping segment is below the first level;
a level of the second particle-trapping segment is below the first level;
a level of the gap is at or below the first level; and
the level of the first particle-trapping segment and the level of the second particle-trapping segment are below the level of the gap.

22. A data storage device comprising the slider recited in claim 1 .

Assignees

• Western Digital Tech Inc

Inventors

• Hu Yong
• Huang Weidong

Classifications

• G11B5/40

  Protective measures on heads, e.g. against excessive temperature  (G11B5/31 takes precedence; protection against wear G11B5/255  {; protective structure of the head: see under structures, e.g. G11B5/3106}) · CPC title

• G11B5/6082 Primary

  Design of the air bearing surface · CPC title