One or more sliders that include a protective overcoat that extends across the entire air bearing surface

Patent metadata

Field	Value
Publication number	US-2021343310-A1
Application number	US-202117375681-A
Country	US
Kind code	A1
Filing date	Jul 14, 2021
Priority date	Apr 13, 2020
Publication date	Nov 4, 2021
Grant date	—

Abstract

The present disclosure relates to kiss lapping sliders after patterning an air bearing surface pattern, followed by applying a protective overcoat to the air bearing surface. The present disclosure also involves related sliders.

First claim

What is claimed is:

1 ) A slider comprising an air bearing surface having:
a) a leading edge at a first end of the air bearing surface; b) a trailing edge at a second end of the air bearing surface, wherein the first end is opposite to the second end; c) a first region adjacent to the trailing edge, wherein the first region comprises one or more transducer elements; and d) a second region adjacent to the first region and the leading edge,
wherein the air bearing surface has a fluorinated, protective overcoat layer as an outermost layer, wherein the fluorinated, protective overcoat layer extends across the entire air bearing surface.

2 ) The slider according to claim 1 , wherein the air bearing surface comprises a lapped surface and a plurality of milled surfaces, wherein the surface potential difference between the lapped surface and a milled surface is 0+/−20 milliVolts or less as measured according to Kelvin Probe Force Microscopy (KPFM).

3 ) The slider according to claim 1 , wherein the air bearing surface comprises a lapped surface and a plurality of milled surfaces, wherein the surface potential difference between the lapped surface and a milled surface is 0+/−10 milliVolts or less as measured according to Kelvin Probe Force Microscopy (KPFM).

4 ) The slider according to claim 1 , wherein the air bearing surface comprises a lapped surface and a plurality of milled surfaces, wherein the surface potential difference between the lapped surface and a milled surface is 0+/−5 milliVolts or less as measured according to Kelvin Probe Force Microscopy (KPFM).

5 ) The slider according to claim 1 , wherein the air bearing surface comprises a lapped surface and a plurality of milled surfaces, wherein the surface potential difference between the lapped surface and a milled surface is 0+/−2 milliVolts or less as measured according to Kelvin Probe Force Microscopy (KPFM).

6 ) The slider according to claim 1 , wherein the air bearing surface comprises a lapped surface and a plurality of milled surfaces, wherein the surface potential difference between the lapped surface and a milled surface is 0+/−1 milliVolts or less as measured according to Kelvin Probe Force Microscopy (KPFM).

7 ) The slider according to claim 1 , wherein the protective overcoat comprises diamond-like carbon.

8 ) The slider according to claim 1 , wherein the overcoat layer has a thickness in the range from 5 to 100 Å.

9 ) The slider according to claim 1 , further comprising at least one adhesion layer underneath and in contact with the fluorinated, protective overcoat layer.

10 ) The slider according to claim 9 , wherein the at least one adhesion layer comprises material chosen from oxide, carbide, nitride, and combinations thereof.

11 ) The slider according to claim 9 , wherein the at least one adhesion layer comprises material chosen alumina, silicon nitride, silica, titanium carbide, metal oxide, and combinations thereof.

12 ) The slider according to claim 1 , wherein the air bearing surface has a surface roughness (Rq) from 1 to 5 Å as measured according to atomic force microscopy.

13 ) The slider according to claim 1 , wherein the one or more transducer elements comprise at least a magnetoresistive reader element and a magnetoresistive writer element.

14 ) A row bar comprising at least one slider according to claim 1 .

Assignees

• Seagate Technology Llc

Inventors

• Bergerud Amy Jo
• Xiong Iris Cheng

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

• G11B5/3173

  Batch fabrication, i.e. producing a plurality of head structures in one batch · CPC title

• G11B5/3169 Primary

  Working or finishing the interfacing surface of heads, e.g. lapping of heads · CPC title

• G11B5/3166 Primary

  Testing or indicating in relation thereto, e.g. before the fabrication is completed · CPC title

• G11B5/255 Primary

  comprising means for protection against wear {(in thin film structures G11B5/3106)} · CPC title