Laminated side shield for perpendicular write head for improved performance
View Patent ↗A perpendicular write head is disclosed for writing information onto tracks. The write head includes a top pole and a return pole and side shields with laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surface (ABS) and perpendicular to the tracks.
1. A perpendicular write head for writing information onto tracks of a magnetic medium comprising:
a top pole; and
side shields shielding the top pole and each having laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surface (ABS) and perpendicular to the tracks.
2. A perpendicular write head as recited in claim 1 wherein the laminated layers include a non-magnetic layer laminated and positioned adjacent to two magnetic layers forming a stack.
3. A perpendicular write head as recited in claim 2 wherein the laminated layers include a plurality of stacks.
4. A perpendicular write head as recited in claim 2 wherein the magnetic layers are of a material having high magnetic moment.
5. A perpendicular write head as recited in claim 4 wherein the magnetic layers are each composed of an alloy of at least one of the elements iron, nickel or cobalt.
6. A perpendicular write head as recited in claim 4 wherein the magnetic layers are composed of a group comprising of: Nickel Ferrous (or iron) NiFe, Cobalt Ferrous CoFe, Cobalt Nickel Ferrous CoNiFe and CoNi.
7. A perpendicular write head as recited in claim 2 wherein the non-magnetic layer is composed of a group comprising of: Nickel Chromium NiCr, Aluminum Oxide AlO, Silicon Oxide SiO, or SiN.
8. A perpendicular write head as recited in claim 2 wherein said first and second magnetic layers have anti-parallel orientation magnetization with respect to one another due to magnetostatic coupling of the first and second magnetic layers.
9. A perpendicular write head as recited in claim 1 wherein said top pole is laminated.
10. A perpendicular write head as recited in claim 1 further including a trailing shield and a bottom return pole.
11. A perpendicular write head as recited in claim 10 wherein the bottom return pole is laminated.
12. A perpendicular write head as recited in claim 1 wherein the side shields form a U-shape.
13. A perpendicular write head as recited in claim 1 wherein the side shields form an 0 -shape.
14. A perpendicular write head as recited in claim 1 further including at least one stud connecting the side shields to a return pole.
15. A perpendicular write head as recited in claim 1 wherein the side shields are draped.
16. A write head for writing information onto tracks of a magnetic medium comprising:
a top pole; and
side shields shielding the top pole and having laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surface (ABS) and perpendicular to the tracks.
17. A write head as recited in claim 16 wherein the laminated layers include a non-magnetic layer laminated and positioned adjacent to two magnetic layers forming a stack.
18. A write head as recited in claim 17 wherein the laminated layers include a plurality of stacks.
19. A write head as recited in claim 17 wherein the magnetic layers are of a material having high magnetic moment.
20. A write head as recited in claim 19 wherein the magnetic layers are each composed of an alloy of at least one of the elements iron, nickel or cobalt.
21. A write head as recited in claim 19 wherein the magnetic layers are composed of a group consisting of: Nickel Ferrous (or iron) NiFe, Cobalt Ferrous CoFe, Cobalt Nickel Ferrous CoNiFe and CoNi.
22. A write head as recited in claim 17 wherein the non-magnetic layer is composed of a group consisting of: Nickel Chromium NiCr, Aluminum Oxide AlO, Silicon Oxide SiO, or SiN.
23. A write head as recited in claim 17 wherein said two magnetic layers are oriented anti-parallel to each other due to magnetostatic coupling of the two magnetic layers.
24. A write head as recited in claim 16 wherein said top pole is laminated.
25. A write head as recited in claim 16 further including a trailing shield and a bottom return pole.
26. A perpendicular write head as recited in claim 25 wherein the bottom return pole is laminated.
27. A perpendicular write head as recited in claim 16 wherein the side shields form a U-shape.
28. A perpendicular write head as recited in claim 16 wherein the side shields form a O-shape.
29. A perpendicular write head as recited in claim 16 wherein the side shields are draped.
30. A perpendicular write head as recited in claim 16 further including one or more studs connecting the side shields to a return pole.
31. A perpendicular write head comprising:
a top pole; and
side shield means shielding the top pole and having laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surface (ABS) and perpendicular to the tracks.
32. A perpendicular write head as recited in claim 31 wherein the laminated layers include a non-magnetic layer laminated and positioned adjacent two magnetic layers forming a stack.
33. A perpendicular write head as recited in claim 32 wherein the magnetic layers are of a material having high magnetic moment.
34. A perpendicular write head as recited in claim 33 wherein the magnetic layers are each composed of an alloy of at least one of the elements iron, nickel or cobalt.
35. A perpendicular write head as recited in claim 33 wherein the magnetic layers are composed of a group consisting of: Nickel Ferrous (or iron) NiFe, Cobalt Ferrous CoFe, Cobalt Nickel Ferrous CoNiFe and CoNi.
36. A perpendicular write head as recited in claim 32 wherein the non-magnetic layer is composed of a group consisting of: Nickel Chromium NiCr, Aluminum Oxide AlO, Silicon Oxide SiO, or SiN.
37. A perpendicular write head as recited in claim 32 wherein said two magnetic layers are oriented anti-parallel to each other due to magnetostatic coupling thereof.
38. A perpendicular write head as recited in claim 31 wherein the laminated layers include a plurality of stacks.
39. A perpendicular write head as recited in claim 31 wherein said top pole is laminated.
40. A perpendicular write head as recited in claim 31 further including a trailing shield and a bottom return pole.
41. A perpendicular write head as recited in claim 40 wherein the bottom return pole is laminated.
42. A perpendicular write head as recited in claim 31 wherein the side shields form a U-shape.
43. A perpendicular write head as recited in claim 31 wherein the side shields form an O-shape.
44. A perpendicular write head as recited in claim 31 wherein the side shields are draped.
45. A disk drive for storing information onto tracks on magnetic medium comprising:
a motor; and
at least one write head mounted on an actuator arm and coupled therethrough to the motor, said write head having a top pole and at least one draped side return shield having laminated layers wherein said laminated layers have magnetization in a direction parallel to an air bearing surface (ABS) and perpendicular to the tracks.
46. A disk drive as recited in claim 45 wherein the laminated layers include a non-magnetic layer laminated and positioned adjacent to two magnetic layers forming a stack.
47. A disk drive as recited in claim 46 wherein the laminated layers include a plurality of stacks.
48. A perpendicular write head as recited in claim 46 wherein the magnetic layers are of a material having high magnetic moment.
49. A perpendicular write head as recited in claim 48 wherein the magnetic layers are each composed of an alloy of at least one of the elements iron, nickel or cobalt.
50. A perpendicular write head as recited in claim 48 wherein the magnetic layers are composed of a group consisting of: Nickel Ferrous (or iron) NiFe, Cobalt Ferrous CoFe, Cobalt Nickel Ferrous CoNiFe and CoNi.
51. A perpendicular write head as recited in claim 46 wherein the non-magnetic layer is composed of a group consisting of: Nickel Chromium NiCr, Aluminum Oxide AlO, Silicon Oxide SiO, or SiN.
52. A perpendicular write head as recited in claim 46 wherein said two magnetic layers are oriented anti-parallel to each other due to magnetostatic coupling thereof.
53. A perpendicular write head as recited in claim 45 wherein said top pole is laminated.
54. A perpendicular write head as recited in claim 45 further including a trailing shield and a bottom return pole.
55. A perpendicular write head as recited in claim 54 wherein the bottom return pole is laminated.
56. A perpendicular write head as recited in claim 45 wherein the side shields form a U-shape.
57. A perpendicular write head as recited in claim 45 wherein the side shields form an 0 -shape.
58. A perpendicular write head as recited in claim 45 wherein the side hields are draped.
59. A perpendicular write head as recited in claim 45 further including at least one stud connecting the side shields to a return pole.