Air bearing surface design with extreme particle trapping holes for improving HDD particle robustnes

Patent metadata

Field	Value
Publication number	US-9230587-B1
Application number	US-201514640684-A
Country	US
Kind code	B1
Filing date	Mar 6, 2015
Priority date	Mar 6, 2015
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

Embodiments disclosed herein generally relate to a head slider within disk drive data storage devices. A head slider comprises a head body having a leading portion on a leading edge and a trailing portion on a trailing edge. The leading portion includes a first leading pad disposed at the MFS and a second leading pad disposed between the first leading pad and the leading edge. The second leading pad is recessed a first vertical distance from the MFS. One or more particle trapping holes are disposed between the first leading pad and the second leading pad. The one or more particle trapping holes are recessed a second vertical distance from the MFS, the second vertical distance being greater than the first vertical distance. Particles encountered by the leading portion may be suctioned into the one or more particle trapping holes, preventing the particles from building-up onto the MFS.

First claim

What is claimed is:

1. A head slider, comprising:
a head body having a leading edge, a trailing edge and a media facing surface, the media facing surface having:
a trailing portion, the trailing portion having first and second side pads disposed at the media facing surface; and
a leading portion having a first leading pad disposed at the media facing surface;

the head body also having a second leading pad disposed between the leading edge and the first leading pad, the second leading pad at least partially surrounding the first leading pad, wherein the second leading pad is disposed at a first surface recessed a first vertical distance from the media facing surface;
wherein one or more first particle trapping holes are disposed between the first leading pad and the second leading pad, wherein a bottom of the one or more first particle trapping holes are disposed a second vertical distance from the media facing surface that is greater than the first vertical distance, wherein the head body further comprises a wall at least partially surrounding a perimeter of the trailing portion and the first and second side pads, wherein the wall is disposed at the first vertical distance, wherein one or more second particle trapping holes are disposed between the wall and the first and second side pads.

2. The head slider of claim 1 , wherein the one or more second particle trapping holes are disposed at the second vertical distance.

3. A head slider, comprising:
a head body having a leading edge, a trailing edge and a media facing surface, the media facing surface having:
a trailing portion, the trailing portion having first and second side pads disposed at the media facing surface; and
a leading portion having a first leading pad disposed at the media facing surface;

the head body also having a second leading pad disposed between the leading edge and the first leading pad, the second leading pad at least partially surrounding the first leading pad, wherein the second leading pad is disposed at a first surface recessed a first vertical distance from the media facing surface;
wherein one or more first particle trapping holes are disposed between the first leading pad and the second leading pad, wherein a bottom of the one or more first particle trapping holes are disposed a second vertical distance from the media facing surface that is greater than the first vertical distance, wherein the first leading pad has a triangular shaped portion, wherein the triangular shaped portion is at a central position on the first leading pad.

4. The head slider of claim 3 , wherein the one or more first particle trapping holes are disposed adjacent the triangular shaped portion of the first leading pad.

5. A head slider, comprising:
a head body having a leading edge, a trailing edge and a media facing surface, the media facing surface having:
a trailing portion, the trailing portion having first and second side pads disposed at the media facing surface; and
a leading portion having a first leading pad disposed at the media facing surface;

the head body also having a second leading pad disposed between the leading edge and the first leading pad, the second leading pad at least partially surrounding the first leading pad, wherein the second leading pad is disposed at a first surface recessed a first vertical distance from the media facing surface;
wherein one or more first particle trapping holes are disposed between the first leading pad and the second leading pad, wherein a bottom of the one or more first particle trapping holes are disposed a second vertical distance from the media facing surface that is greater than the first vertical distance, wherein the head body also has a second surface recessed at the second vertical distance, wherein the second surface at least partially surrounds the second leading pad, wherein the head body also has a third surface disposed between the trailing portion and the leading portion, the third surface recessed a third vertical distance from the media facing surface that is greater than the second vertical distance.

6. The head slider of claim 5 , wherein the third vertical distance is between about 0.5 μm to 5 μm.

7. A magnetic recording system, comprising:
an actuator;
an actuator arm coupled to the actuator;
a slider coupled to the actuator arm; and
a head coupled to the slider, the slider comprising:
a head body having a leading edge, a trailing edge and a media facing surface, the media facing surface having:
a trailing portion, the trailing portion having first and second side pads disposed at the media facing surface; and
a leading portion having a first leading pad disposed at the media facing surface;

the head body also having a second leading pad disposed between the leading edge and the first leading pad, the second leading pad at least partially surrounding the first leading pad, wherein the second leading pad is disposed at a first surface recessed a first vertical distance from the media facing surface;

wherein one or more first particle trapping holes are disposed between the first leading pad and the second leading pad, wherein a bottom of the one or more first particle trapping holes are disposed a second vertical distance from the media facing surface that is greater than the first vertical distance, wherein the head body further comprises a wall disposed at the first vertical distance, the wall at least partially surrounding a perimeter of the trailing portion and the first and second side pads, wherein one or more second particle trapping holes are disposed between the wall and the first and second side pads.

8. The magnetic recording system of claim 7 , wherein the one or more second particle trapping holes are disposed at the second vertical distance.

9. A magnetic recording system, comprising:
an actuator;
an actuator arm coupled to the actuator;
a slider coupled to the actuator arm; and
a head coupled to the slider, the slider comprising:
a head body having a leading edge, a trailing edge and a media facing surface, the media facing surface having:
a trailing portion, the trailing portion having first and second side pads disposed at the media facing surface; and
a leading portion having a first leading pad disposed at the media facing surface;

the head body also having a second leading pad disposed between the leading edge and the first leading pad, the second leading pad at least partially surrounding the first leading pad, wherein the second leading pad is disposed at a first surface recessed a first vertical distance from the media facing surface;

wherein one or more first particle trapping holes are disposed between the first leading pad and the second leading pad, wherein a bottom of the one or more first particle trapping holes are disposed a second vertical distance from the media facing surface that is greater than the first vertical distance, wherein the one or more first particle trapping holes have a width between about 1 μm and 200 μm, wherein the first leading pad has a triangular shaped portion, wherein the triangular shaped portion is at a central position on the first leading pad.

10. The magnetic recording system of claim 9 , wherein the one or more first particle trapping holes are disposed adjacent the triangular shaped portion of the first leading pad.

11. A magnetic recording system, comprising:
an actuator;
an actuator arm coupled to the actuator;
a slider coupled to the actuator arm; and
a head coupled to the slider, the slider comprising:
a head body having a leading edge, a trailing edge and a media facing surface, the media facing surface having:
a trailing portion, the trailing portion having

Assignees

• HGST Netherlands BV

Inventors

• Hu Yong
• Huang Weidong
• Tanaka Katsuhide

Classifications

• G11B5/6082 Primary

  Design of the air bearing surface · CPC title

• G11B33/1446

  Reducing contamination, e.g. by dust, debris · CPC title