Perpendicular magnetic recording head having nonmagnetic insertion layers
View Patent ↗The method and system provide a perpendicular magnetic recording (PMR) head having an air bearing surface (ABS). The PMR head includes first and second poles each having front and back gap regions, a first nonmagnetic insertion layer between the back gap regions, a magnetic pole layer with a front terminating at the ABS, a write gap, shield(s), a second nonmagnetic insertion layer between the second pole back gap region and the shield(s), and coil(s) between the shield(s) and the first pole. The magnetic pole layer terminates between the ABS and the second pole back gap region and has pole angle(s) of at least thirty and not more than fifty degrees. At least part of the magnetic pole layer resides on the second pole. Part of the shield(s) are adjacent to the write gap. Another part of the shield(s) is coupled with the second pole back gap region.
1. A perpendicular magnetic recording (PMR) head having an air bearing surface, the PMR head comprising;
a first pole including a first pole front region and a first pole back gap region;
a second pole having a second pole front region and a second pole back gap region, the first pole back gap region being coupled with and the second pole back gap region;
a first nonmagnetic insertion layer residing between the second pole back gap region and the first pole back gap region;
a magnetic pole layer terminating at the air bearing surface, the magnetic pole layer having a front and a back terminating between the air bearing surface and the second pole back gap region, the magnetic pole layer having at least one pole angle of at least thirty degrees and not more than fifty degrees, at least a portion of the magnetic pole layer residing on the second pole;
a write gap adjacent to the front of the magnetic pole layer;
at least one shield, a first portion of the at least one shield adjacent to the write gap, a second portion of the at least one shield coupled with the second pole back gap region;
a second nonmagnetic insertion layer residing between the second pole back gap region and the second portion of the at least one shield; and
at least one coil residing between the at least one shield and the first pole.
2. The PMR head of claim 1 further comprising:
an insulator, a portion of the insulator residing between the second pole front and the air bearing surface.
3. The PMR head of claim 1 wherein the first nonmagnetic insertion layer is adjacent to the first back gap region, the PMR head further comprising:
a first pole pad between the first pole and the second pole, the first pole pad magnetically coupling the first pole and the second pole.
4. The PMR head of claim 1 further comprising:
at least one pole pad between the second pole and the second portion of the at least one shield, a first portion of the least one pole pad being adjacent to the second pole back gap, a second portion of the least one pole pad adjacent to the second portion of the at least one shield, the least one pole pad magnetically coupling the second pole and the plurality of shields.
5. The PMR head of claim 4 wherein the second nonmagnetic insertion layer resides between the first portion and the second portion of the least one pole pad.
6. The PMR head of claim 4 wherein the first portion of the least one pole pad is a first pole pad and the second portion of the least one pole pad is a second pole pad.
7. The PMR head of claim 1 wherein the magnetic pole layer includes a nose, the at least one pole angle including a nose angle.
8. The PMR head of claim 7 wherein the nose angle is at least twenty degrees and not more than fifty degrees.
9. The PMR head of claim 7 wherein the nose angle is at least thirty-five degrees and not more than forty-five degrees.
10. The PMR head of claim 7 wherein the at least one angle includes an additional angle, the nose angle being between the nose and the additional angle.
11. The PMR head of claim 10 wherein the additional angle is at least thirty degrees and not more than sixty degrees.
12. The PMR head of claim 11 wherein the additional angle is at least forty degrees and not more than fifty degrees.
13. The PMR head of claim 1 further comprising:
a third nonmagnetic insertion layer residing between the magnetic pole layer and the second pole.
14. A perpendicular magnetic recording (PMR) head having an air bearing surface, the PMR head comprising;
a first pole including a first pole front region and a first pole back gap region;
a second pole having a second pole front region and a second pole back gap region, the first pole back gap region being coupled with and the second pole back gap region;
a first pole pad between the first pole and the second pole, the first pole pad magnetically coupling the first pole and the second pole;
a first nonmagnetic insertion layer residing between the second pole back gap region and the first pole back gap region, the first nonmagnetic insertion layer residing between the first pole pad back gap and the first pole pad;
a magnetic pole layer terminating at the air bearing surface, the magnetic pole layer having a front and a back terminating between the air bearing surface and the second pole back gap region, the magnetic pole layer having at least one pole angle of at least thirty-five degrees and not more than forty-five degrees, at least a portion of the magnetic pole layer residing on the second pole;
a second nonmagnetic insertion layer residing between the magnetic pole layer and the second pole;
a write gap adjacent to the front of the magnetic pole layer;
at least one shield, a first portion of the at least one shield adjacent to the write gap, a second portion of the at least one shield coupled with the second pole back gap region;
a first pole pad adjacent to the second pole back gap;
a third nonmagnetic insertion layer residing adjacent to the first pole pad; and
a second pole pad residing between the third nonmagnetic insertion layer and the second portion of the at least one shield, a first pole pad and the second pole pad magnetically coupling the second pole and the plurality of shields
at least one coil residing between the at least one shield and the first pole.
15. A method for providing a perpendicular magnetic recording (PMR) head having an air bearing surface, the method comprising;
providing a first pole including a first pole front region and a first pole back gap region;
providing a second pole having a second pole front region and a second pole back gap region, the first pole back gap region being coupled with and the second pole back gap region;
providing a first nonmagnetic insertion layer residing between the second pole back gap region and the first pole back gap region;
providing a magnetic pole layer terminating at the air bearing surface, the magnetic pole layer having a front and a back terminating between the air bearing surface and the second pole back gap region, the magnetic pole layer having at least one pole angle of at least thirty degrees and not more than fifty degrees, at least a portion of the magnetic pole layer residing on the second pole;
providing a write gap adjacent to the front of the magnetic pole layer;
providing at least one shield, a first portion of the at least one shield adjacent to the write gap, a second portion of the at least one shield coupled with the second pole back gap region;
providing a second nonmagnetic insertion layer residing between the second pole back gap region and the second portion of the at least one shield; and
providing at least one coil residing between the at least one shield and the first pole.
16. The method of claim 15 wherein the first nonmagnetic insertion layer is adjacent to the first back gap region, the method further comprising:
providing a first pole pad between the first pole and the second pole, the first pole pad magnetically coupling the first pole and the second pole.
17. The method of claim 15 further comprising:
providing at least one pole pad between the second pole and the second portion of the at least one shield, a first portion of the at least one pole pad being adjacent to the second pole back gap, a second portion of the at least one pole pad adjacent to the second portion of the at least one shield, the at least one pole pad magnetically coupling the second pole and the plurality of shields.
18. The method of claim 17 wherein the second nonmagnetic insertion layer resides between the first portion and the second portion of the at least one pole pad.
19. The method of claim 17 wherein the first portion of the at least one pole pad is a first pole pad and the second portion of the at least one pole pad is a second pole pad.
20. The method of claim 15 wherein the magnetic pole layer includes a nose and the at least one pole angle includes a nose angle.
21. The method of claim 20 wherein the nose angle is at least thirty degrees and not more than fifty degrees.
22. The method of claim 20 wherein the nose angle is at least thirty-five degrees and not more than forty-five degrees.
23. The method of claim 20 wherein the at least one pole angle includes an additional angle, the nose angle being between the nose and the additional angle.
24. The method of claim 23 wherein the additional angle is at least thirty five degrees and not more than sixty degrees.
25. The method of claim 24 wherein the additional angle is at least forty degrees and not more than fifty degrees.
26. The method of claim 15 further comprising:
providing a third nonmagnetic insertion layer residing between the magnetic pole layer and the second pole.
27. A method for providing a perpendicular magnetic recording (PMR) head having an air bearing surface, the method comprising;
providing a first pole including a first pole front region and a first pole back gap region;
providing a second pole having a second pole front region and a second pole back gap region, the first pole back gap region being coupled with and the second pole back gap region;
providing a first pole pad between the first pole and the second pole, the first pole pad magnetically coupling the first pole and the second pole;
providing a first nonmagnetic insertion layer residing between the second pole back gap region and the first pole back gap region, the first pole pad residing between the first pole pad back gap and the first pole pad;
providing a magnetic pole layer terminating at the air bearing surface, the magnetic pole layer having a front and a back terminating between the air bearing surface and the second pole back gap region, the magnetic pole layer having at least one pole angle of at least twenty-five degrees and not more than thirty-five degrees, at least a portion of the magnetic pole layer residing on the second pole;
providing a second nonmagnetic insertion layer residing between the magnetic pole layer and the second pole;
providing a write gap adjacent to the front of the magnetic pole layer;
providing at least one shield, a first portion of the at least one shield adjacent to the write gap, a second portion of the at least one shield coupled with the second pole back gap region;
providing a first pole pad adjacent to the second pole back gap;
providing a third nonmagnetic insertion layer residing adjacent to the first pole pad; and
providing a second pole pad residing between the third nonmagnetic insertion layer and the second portion of the at least one shield, a first pole pad and the second pole pad magnetically coupling the second pole and the plurality of shields providing at least one coil residing between the at least one shield and the first pole.