Recessed write pole for perpendicular recording
View Patent ↗A disk drive having a head with a recessed write pole for perpendicular recording to a disk. The head also includes a read element, a first shield and a second shield that share a common plane, and the write pole is recessed relative to the plane, thereby reducing pole tip protrusion.
1. A disk drive comprising:
a disk having a disk surface for storing information thereon;
a head for writing information onto the disk surface using a write pole, wherein the head includes a magnetoresistive read element, a first shield and a second shield that lie in a plane, wherein said write pole is recessed by a distance (d) relative to said plane, and wherein the distance (d) is greater than 1 nm and less than 12 nm; and
a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
2. The disk drive of claim 1 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
3. The disk drive of claim 2 , wherein the distance (d) is about 5 nm.
4. The disk drive of claim 1 , wherein the head includes a return associated with the write pole and wherein the return is recessed relative to said plane.
5. A transducer comprising:
a head for writing information using a write pole, wherein the head includes a magnetoresistive read element, a first magnetic flux shield and a second magnetic flux shield that lie in a plane, wherein said write pole is recessed by a distance (d) relative to said plane, wherein the head includes a return associated with the write pole; and
a heat source associated with said head for performing heat-activated recording of information onto a disk surface.
6. The transducer of claim 5 , wherein the return is recessed relative to said plane by a distance different from the distance (d).
7. The transducer of claim 5 , wherein the head includes a write coil associated with the write pole and wherein said write coil is recessed relative to said plane.
8. The transducer of claim 5 , wherein the first magnetic flux shield is positioned closer to the return as compared to the second magnetic flux shield, and wherein the first magnetic flux shield and the return are separated by a distance (x).
9. The transducer of claim 8 , wherein the distance (x) is at least 2 microns and less than 22 microns.
10. The transducer of claim 9 , wherein the distance (x) is at least 4 microns and less than 20 microns.
11. The transducer of claim 5 , wherein the distance (d) is greater than 1 nm and less than 12 nm.
12. The transducer of claim 11 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
13. The transducer of claim 12 , wherein the distance (d) is about 5 nm.
14. A disk drive comprising:
a disk having a disk surface for storing information thereon; and,
a head which flies above said disk surface and which writes information onto the disk surface using a write pole that is spaced a first distance from the disk surface, wherein the head includes a magnetoresistive read element spaced a second distance from the disk surface, wherein the first distance is greater than the second distance, and wherein the difference between the first distance and the second distance is greater than 1 nm and less than 12 nm, and the head includes a return associated with the write pole and the return is spaced a third distance from the disk surface and the second distance and the third distance are different from one another.
15. The disk drive of claim 14 , wherein the difference between the first distance and the second distance is greater than 2 nm and less than 10 nm.
16. The disk drive of claim 15 , wherein the difference between the first distance and the second distance is about 5 nm.
17. The disk drive of claim 14 , further including a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
18. A sensor comprising:
a head for writing information using a write pole, wherein the head includes a magnetoresistive read element having a surface which lies in a plane, wherein said write pole is recessed by a distance (d) relative to said plane; and
a heat source associated with said head for performing heat-activated recording of information onto a disk surface.
19. The sensor of claim 18 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
20. The sensor of claim 19 , wherein the distance (d) is about 5 nm.
21. The sensor of claim 18 , wherein the head includes a return associated with the write pole and wherein the return is recessed relative to said plane.
22. A transducer comprising:
a head for writing information using a write pole, wherein the head includes a magnetoresistive read element having a surface which lies in a plane, wherein said write pole is recessed by a distance (d) relative to said plane, wherein the head includes a return associated with the write pole; and
a heat source associated with said head for performing heat-activated recording of information onto a disk surface.
23. The sensor of claim 22 , wherein the return is recessed relative to said plane by a distance different from the distance (d).
24. The sensor of claim 22 , wherein the head includes a write coil associated with the write pole and wherein said write coil is recessed relative to said plane.
25. A disk drive comprising:
a disk having a disk surface for storing information thereon; and,
a head for writing information onto the disk surface using a write pole, said head being manufactured using a lapping process, wherein the head includes a magnetoresistive read element lying in a plane formed upon completion of the lapping process, wherein said write pole is recessed by a distance (d) relative to said plane, and wherein the distance (d) is greater than 1 nm and less than 12 nm; and
a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
26. The disk drive of claim 25 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
27. The disk drive of claim 26 , wherein the distance (d) is about 5 nm.
28. The disk drive of claim 25 , wherein the head includes a return associated with the write pole and wherein the return is recessed relative to said plane.
29. A disk drive comprising:
a disk having a disk surface for storing information thereon; and,
a head for writing information onto the disk surface using a write pole, said head being manufactured using a lapping process, wherein the head includes a magnetoresistive read element lying in a plane formed upon completion of the lapping process, wherein said write pole is recessed by a distance (d) relative to said plane, wherein the head includes a return associated with the write pole; and
a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
30. The disk drive of claim 29 , wherein the return is recessed relative to said plane by a distance different from the distance (d).
31. The disk drive of claim 29 , wherein the head includes a write coil associated with the write pole and wherein said write coil is recessed relative to said plane.
32. A sensor comprising:
a head for writing information using a write pole, wherein the head includes a magnetoresistive read element, a first shield and a second shield that lie in a plane and wherein no portion of said write pole lies within said plane; and
a heat source associated with said head for performing heat-activated recording of information onto a disk surface.
33. The sensor of claim 32 , wherein the head includes a return associated with the write pole.
34. The sensor of claim 33 , wherein the first shield is positioned closer to the return as compared to the second shield, and wherein the first shield and the return are separated by a distance (x).
35. The sensor of claim 34 , wherein the distance (x) is at least 2 microns and less than 22 microns.
36. The sensor of claim 35 , wherein the distance (x) is at least 4 microns and less than 20 microns.
37. A disk drive comprising:
a recording disk; and,
a head for reading information from and writing information to the disk, wherein the head includes a read portion and a write portion, the read portion includes a magnetoresistive read element, a first shield and a second shield, the write portion includes a write pole, a write coil and a return, the read element, the first shield and the second shield lie in a plane at an air-bearing surface which faces the disk, the write pole is recessed by a distance (d) relative to the plane and the distance (d) is greater than 1 nm and less than 12 nm; and
a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
38. The disk drive of claim 37 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
39. The disk drive of claim 38 , wherein the distance (d) is about 5 nm.
40. The disk drive of claim 37 , wherein the write coil is recessed relative to the plane.
41. The disk drive of claim 37 , wherein the return is recessed relative to the plane.
42. The disk drive of claim 41 , wherein the return is recessed relative to the plane by the distance (d).
43. The disk drive of claim 41 , wherein the return is recessed relative to the plane by greater than the distance (d).
44. The disk drive of claim 41 , wherein the return is recessed relative to the plane by less than the distance (d).
45. The disk drive of claim 37 , wherein the write portion expands towards the disk upon introduction of a write current into the write coil.
46. The disk drive of claim 37 , wherein the write pole is recessed relative to the plane due to etching or ion milling.
47. A disk drive comprising:
a recording disk; and,
a head for reading information from and writing information to the disk, wherein the head includes a read portion and a write portion, the read portion includes a magnetoresistive read element, a first shield and a second shield, the write portion includes a write pole, a write coil and a return, the read element, the first shield and the second shield lie in a plane at an airbearing surface which faces the disk, and the write pole and the return are recessed by a distance (d) relative to the plane; and
a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
48. The disk drive of claim 47 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
49. The disk drive of claim 47 , wherein the write coil is recessed relative to the plane.
50. The disk drive of claim 47 , wherein the write portion expands towards the disk upon introduction of a write current into the write coil.
51. The disk drive of claim 47 , wherein the write pole and the return are recessed relative to the plane due to etching or ion milling.
52. A disk drive comprising:
a recording disk; and,
a head for reading information from and writing information to the disk, wherein the head includes a read portion and a write portion, the read portion includes a magnetoresistive read element, a first shield and a second shield, the write portion includes a write pole, a write coil and a return, the read element, the first shield and the second shield lie in a plane at an airbearing surface which faces the disk, the write pole and the return are recessed by a distance (d) relative to the plane and the distance (d) is greater than 1 nm and less than 12 nm, thereby reducing pole tip protrusion in the head due to the write pole and the return being recessed relative to the plane; and
a heat source associated with said head for performing heat-activated recording of information onto the disk surface.
53. The disk drive of claim 52 , wherein the distance (d) is greater than 2 nm and less than 10 nm.
54. The disk drive of claim 52 , wherein the write coil is recessed relative to the plane.
55. The disk drive of claim 52 , wherein the write portion expands towards the disk upon introduction of a write current into the write coil.
56. The disk drive of claim 52 , wherein the write pole and the return are recessed relative to the plane due to etching or ion milling.