Systems and methods for correcting slider parallelism error using compensation lapping

Patent metadata

Field	Value
Publication number	US-9343084-B2
Application number	US-201213420281-A
Country	US
Kind code	B2
Filing date	Mar 14, 2012
Priority date	Mar 14, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Systems and methods for correcting slider parallelism error using compensation lapping are described. One such system includes a lapping support including at least one mounting surface having a preselected mounting angle such that a line normal to the at least one mounting surface is not parallel to a centerline of the lapping support, a rowbar including a plurality of magnetic transducers spaced apart along a length of the rowbar, and a lapping plate configured to lap the rowbar, where the rowbar is mounted to the at least one mounting surface, and where the rowbar is configured to be brought into contact with the lapping plate.

First claim

What is claimed is:

1. A system for correcting slider parallelism, the system comprising:
a lapping support comprising a ring shape having a centerline, the ring shape comprising at least one mounting surface being flat and having a preselected mounting angle such that a line normal to the at least one mounting surface is not parallel to the centerline of the ring shape;
a rowbar comprising a plurality of magnetic transducers spaced apart along a length of the rowbar; and
a lapping plate configured to lap the rowbar, the lapping plate comprising a flat lapping surface, wherein the lapping support is positioned such that a line normal to the lapping surface is parallel to the centerline of the ring shape,
wherein the rowbar is mounted to the at least one mounting surface, and
wherein the rowbar is configured to be brought into contact with the lapping surface.

2. The system of claim 1 :
wherein the rowbar comprises a block shape comprising an air bearing surface (ABS), a backside surface opposite the ABS, a leading edge side surface, a trailing edge side surface opposite the leading edge surface, and two end surfaces,
wherein the ABS is mounted to the at least one mounting surface, and
wherein the backside surface is configured to be lapped with the lapping plate such that the backside surface comprises a preselected tilt angle.

3. The system of claim 2 :
wherein the ABS is configured to be lapped to have a preselected tilt angle,
wherein the preselected mounting angle of the at least one mounting surface is selected to substantially match the preselected ABS tilt angle, and
wherein the preselected backside tilt angle is substantially supplementary to the preselected ABS tilt angle such that the ABS, after lapping, is substantially parallel to the backside surface, after lapping.

4. The system of claim 1 , wherein the at least one mounting surface comprises a plurality of mounting surfaces each having a different preselected mounting angle.

5. The system of claim 1 , wherein the at least one mounting surface comprises:
a first mounting surface having a preselected mounting angle of about 90.2 degrees;
a second mounting surface having a preselected mounting angle of about 90.1 degrees;
a third mounting surface having a preselected mounting angle of about 89.925 degrees; and
a fourth mounting surface having a preselected mounting angle of about 89.85 degrees.

6. The system of claim 1 :
wherein the ring shape of the lapping support is a cylindrical shape comprising an inner surface, an outer surface, a bottom surface, and a top surface; and
wherein the at least one mounting surface is positioned along the top surface.

7. The system of claim 1 :
wherein the at least one mounting surface is configured to receive a plurality of rowbars, and
wherein the lapping plate is configured to lap the plurality of rowbars.

8. The system of claim 1 , wherein the rowbar is mounted to the mounting surface using an adhesive material.

9. The system of claim 8 , wherein the adhesive material comprises an adhesive selected from the group consisting of a thermal release tape adhesive, an ultraviolet release tape adhesive, a cyanoacrylate adhesive, a urethane hot melt adhesive, and combinations thereof.

10. The system of claim 1 , wherein a position of the at least one mounting surface is fixed with respect to the lapping support.

11. The system of claim 1 , wherein the at least one mounting surface comprises a plurality of discrete mounting surfaces spaced apart from each other.

12. A method for correcting slider parallelism, the method comprising:
providing a lapping support comprising a ring shape having a centerline, the ring shape comprising at least one mounting surface being flat and having a preselected mounting angle such that a line normal to the at least one mounting surface is not parallel to the centerline of the ring shape;
providing a rowbar comprising a plurality of magnetic transducers spaced apart along a length of the rowbar; and
mounting the rowbar to the at least one mounting surface of the lapping support;
moving the lapping support such that the rowbar makes contact with a lapping plate comprising a flat lapping surface, wherein the lapping support is positioned such that a line normal to the lapping surface is parallel to the centerline of the ring shape; and
lapping a surface of the rowbar using the lapping surface.

13. The method of claim 12 :
wherein the rowbar comprises a block shape comprising an air bearing surface (ABS), a backside surface opposite the ABS, a leading edge side surface, a trailing edge side surface opposite the leading edge surface, and two end surfaces,
wherein the mounting the rowbar to the at least one mounting surface of the lapping support comprises mounting the ABS of the rowbar to the at least one mounting surface, and
wherein the lapping the surface of the rowbar using the lapping plate comprises lapping the backside surface such that the backside surface comprises a preselected tilt angle.

14. The method of claim 13 : further comprising:
mounting the backside surface of the rowbar to a mounting surface of the lapping support; and
lapping the ABS of the rowbar using the lapping plate,
wherein the ABS is configured to be lapped to have a preselected tilt angle,
wherein the preselected mounting angle is selected to be substantially match the preselected ABS tilt angle, and
wherein the preselected backside tilt angle is substantially supplementary to the preselected ABS tilt angle such that the lapped ABS is substantially parallel to the lapped backside surface.

15. The method of claim 12 , wherein the at least one mounting surface comprises a plurality of mounting surfaces each having a different preselected mounting angle.

16. The method of claim 12 , wherein the at least one mounting surface comprises:
a first mounting surface having a preselected mounting angle of about 90.2 degrees;
a second mounting surface having a preselected mounting angle of about 90.1 degrees;
a third mounting surface having a preselected mounting angle of about 89.925 degrees; and
a fourth mounting surface having a preselected mounting angle of about 89.85 degrees.

17. The method of claim 12 :
wherein the ring shape of the lapping support is a cylindrical shape comprising an inner surface, an outer surface, a bottom surface, and a top surface; and
wherein the at least one mounting surface is positioned along the top surface.

18. The method of claim 12 :
wherein the mounting the rowbar to the at least one mounting surface of the lapping support comprises mounting a plurality of rowbars to the at least one mounting surface, and
wherein the lapping the surface of the rowbar using the lapping plate comprises lapping a surface of each of the plurality of rowbars using the lapping plate.

19. The method of claim 12 , wherein the rowbar is mounted to the mounting surface using an adhesive material.

20. The method of claim 19 , wherein the adhesive material comprises an adhesive selected from the group consisting of a thermal release tape adhesive, an ultraviolet release tape adhesive, a cyanoacrylate adhesive, a urethane hot melt adhesive, and combinations thereof.

21. The method of claim 12 :
wherein the providing the rowbar comprising the plurality of magnetic transducers spaced apart along the length of the rowbar comprises:
providing a wafer on which a plurality of magnetic transducers have been formed in a plurality of rows;
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Assignees

• Yaemglin Theera
• Supavasuthi Chakkrit
• Western Digital Tech Inc

Inventors

• Yaemglin Theera
• Supavasuthi Chakkrit

Classifications

• G11B5/3169

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

• G11B5/3173

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

• G11B5/102 Primary

  Manufacture of housing · CPC title