Magnetic head having a material formed in one or more recesses extending into the media support surface of at least one of the substrate and the closure

• US 8,547,665 B2
• Filed: 01/03/2008
• Issued: 10/01/2013
• Est. Priority Date: 01/03/2008
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Biskeborn, Robert Glenn, Lo, Calvin Shyhjong, McClelland, Gary Miles
• Primary Examiner(s): Watko, Julie Anne
• Application Number:
  US11/969,073
• Publication Number:
  US 20090174967A1
• Time in Patent Office: 2,098 Days
• Field of Search: 360/122, 360/231, 360/317, 360/119.03, 360/119.04, 360/119.07, 360/119.11, 360/230, 360/235.1, 360/235.2
• US Class Current: 360/317
• CPC Class Codes: G11B 5/3106 where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination G11B5/3133 takes precedence
• CPC Class Codes: G11B 5/3116 Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks G11B5/3113, G11B5/245 take precedence

Abstract

In one embodiment, a magnetic head includes a substrate having a media support surface; a gap coupled to the substrate, the gap having at least one of a magnetoresistive (MR) sensor and a writer; a closure coupled to the gap on a side thereof opposite the substrate, said closure forming a portion of the media support surface; and a material formed in one or more recesses extending into the media support surface of at least one of the substrate and the closure.

Claims

1. A magnetic head, comprising:

a substrate having a media support surface;

a gap coupled to the substrate, the gap having at least one of a magnetoresistive (MR) sensor and a writer;

a closure coupled to the gap on a side thereof opposite the substrate, said closure forming a portion of the media support surface; and

an electrically conductive material formed in one or more recesses extending into the media support surface of at least one of the substrate and the closure,

wherein a length of each of the one or more recesses is defined between opposite ends thereof positioned farthest apart, wherein the length of each of the one or more recesses is less than a width of the substrate measured in a direction perpendicular to a direction of tape travel thereacross,

wherein the gap has a gap profile recessed from the media support surface, and further comprising a nonmagnetic material formed in a recess defined between the gap profile and a plane of the media support surface.

2. A head as recited in claim 1, wherein the material includes at least one of a metal and a fluorinated material.

3. A head as recited in claim 1, wherein the material is underfilled, wherein an upper surface of the material does not extend to the media support surface of the at least one of the substrate and closure.

4. A head as recited in claim 1, wherein the length of each of the one or more recesses is less than half the width of the substrate.

5. A head as recited in claim 1, wherein each of the one or more recesses is between about 10 and about 50 nanometers deep from the media bearing surface, wherein each of the one or more recesses is between about 0.1 and about 20 microns wide.

6. A head as recited in claim 1, wherein the one or more recesses is elongated, wherein an axis thereof is oriented at an angle of between 1 and 90 degrees from a line parallel to a direction of tape travel across the media support surface.

7. A head as recited in claim 1, wherein the one or more recesses is elongated, wherein an axis thereof is oriented about parallel to a direction of tape travel across the media support surface.

8. A head as recited in claim 1, wherein the nonmagnetic material is electrically conductive.

9. A head as recited in claim 1, wherein the one or more recesses are formed in the substrate.

10. A head as recited in claim 1, wherein the one or more recesses are formed in the closure.

11. A head as recited in claim 1, wherein the one or more recesses are formed in both the substrate and the closure.

12. A magnetic data storage system, comprising:

a magnetic head as recited in claim 1;

a drive mechanism for passing a magnetic recording tape over the head; and

a controller electrically coupled to the head.

13. A magnetic tape head, comprising:

a substrate having a tape support surface;

a gap coupled to the substrate, the gap having at least one of a magnetoresistive (MR) sensor and a writer, wherein the gap has a gap profile recessed from the tape support surface;

a laminate layer formed in a recess defined between the gap profile and a plane of the tape support surface, the laminate layer comprising an electrically insulating layer formed adjacent the gap profile and at least one additional layer; and

a closure coupled to the gap on a side thereof opposite the substrate, said closure forming a portion of the tape support surface.

14. A head as recited in claim 13, wherein the at least one additional layer of the laminate layer further comprises a nonmagnetic electrically conductive layer formed above the electrically insulating layer.

15. A head as recited in claim 13, wherein the at least one additional layer of the laminate layer includes a fluorinated material, the fluorinated material forming a portion of the tape support surface.

16. A magnetic data storage system, comprising:

a magnetic head as recited in claim 13;

a drive mechanism for passing a magnetic recording tape over the head; and

a controller electrically coupled to the head.

17. A magnetic head, further comprising:

a substrate having a media support surface;

a gap coupled to the substrate, the gap having at least one of a magnetoresistive (MR) sensor and a writer, wherein the gap has a gap profile recessed from the media support surface;

an electrically conductive layer formed in a recess defined between the gap profile and a plane of the media support surface;

a closure coupled to the gap on a side thereof opposite the substrate, said closure forming a portion of the media support surface;

a material formed in at least one recess extending into the media support surface of at least one of the substrate and the closure; and

an electrically insulating layer positioned between the electrically conductive layer and the gap profile, wherein the magnetic head is a tape head.

18. A magnetic tape head, comprising:

a substrate having a tape support surface;

a gap coupled to the substrate, the gap having at least one of a magnetoresistive (MR) sensor and a writer, wherein the gap has a gap profile recessed from the tape support surface;

at least two layers formed in a recess defined between the gap profile and a plane of the tape support surface, one of the layers being an electrically insulating layer formed adjacent the gap profile and a nonmagnetic electrically conductive layer formed above the electrically insulating layer;

a closure coupled to the gap on a side thereof opposite the substrate, said closure forming a portion of the tape support surface; and

a material formed in recesses extending into the tape support surface of the substrate and the closure,

wherein a length of each of the recesses is defined between opposite ends of the respective recess, wherein the length of each of the recesses is less than a width of the substrate measured in a direction perpendicular to a direction of tape travel thereacross.