Writer with a hot seed zero throat and substantially flat top pole
View Patent ↗A method and system for providing a recording head is disclosed. The method and system include providing a first pole, a second pole, a write gap and at least one coil. The write cap separates the first pole from the second pole. The coil(s) include a plurality of turns and is between the first and second poles. The first pole includes a pedestal that has a first portion and a second portion. The first portion includes a high moment electroplated material. The second portion includes a hot seed layer that has a high moment sputtered material. The second portion of the first pole is adjacent to the write gap.
1. A recording head comprising:
a first pole having a pedestal, the pedestal having a first portion and a second portion, the first portion including a high moment electroplated material, the second portion including a hot seed layer, the hot seed layer including a high moment sputtered material, the first portion of the pedestal having a first throat height perpendicular to an air-bearing surface of the recording head, the second portion of the pedestal having a second throat height perpendicular to the air-bearing surface, the second throat height being less than the first throat height;
a second pole,
a write gap separating the first pole from the second pole, the second portion of the first pole being adjacent to the write gap; and
at least one coil having a plurality of turns, the at least one coil being between the first pole and the second pole.
2. The recording head of claim 1 wherein the first portion of the pedestal has a first thickness and the second portion of the pedestal has a second thickness less than the first thickness.
3. The recording head of claim 1 wherein the second pole is substantially flat.
4. The recording head of claim 3 wherein a top edge of the pedestal is higher than a top of the at least one coil.
5. The recording head of claim 1 wherein the second portion of the pedestal is laminated.
6. The recording head of claim 5 wherein the second portion of the head includes at least one low moment layer alternated with at least one high moment layer.
7. The recording head of claim 5 wherein the low moment layer includes an amorphous magnetic alloy.
8. The recording head of claim 5 wherein the second portion of the head includes at least one high moment layer alternated with at least one dielectric layer.
9. The recording head of claim 5 wherein the second portion of the head includes at least one high moment layer alternated a soft magnetic material.
10. The recording head of claim 9 wherein the soft magnetic material is NiFe.
11. A method for providing a recording head comprising the steps of:
(a) providing a first pole having a pedestal, the pedestal having a first portion and a second portion, the first portion including a high moment electroplated material, the second portion including a hot seed layer, the hot seed layer including a high moment sputtered material, the first portion of the pedestal having a first throat height perpendicular to an air-bearing surface of the recording head the second portion of the pedestal having a second throat height perpendicular to the air-bearing surface, the second throat height being less than the first throat height;
(b) providing at least one coil having a plurality of turns;
(c) providing a write gap above the pedestal of the first pole, the second portion of the first pole being adjacent to the write gap;
(d) providing a second pole, the write gap separating the first pole from the second pole, the at least one coil being between the first pole and the second pole.
12. The method of claim 11 wherein the step of providing the first pole (a) further includes the steps of:
(a1) providing the first portion of the pedestal with a first thickness; and
(a2) providing the second portion of the pedestal with a second thickness less than the first thickness.
13. The method of claim 11 wherein the second pole is substantially flat.
14. The method of claim 11 wherein the step of providing the at least one coil (b) further includes the step of:
(b1) providing the coil using a damascene process.
15. The method of claim 11 wherein the step of providing the at least one coil
(b) further includes the step of:
(b1) depositing the at least one coil;
(b2) providing a layer of photoresist on the at least one coil;
(b3) removing a portion of the layer of photoresist;
(b4) providing an insulating layer on a remaining portion of the layer of photoresist; and
(b5) planarizing the insulating layer.
16. The method of claim 11 wherein a top edge of the pedestal is higher than a top of the at least one coil.
17. The method of claim 11 wherein the second portion of the pedestal is laminated.
18. The method of claim 17 wherein the second portion of the head includes at least one low moment layer alternated with at least one high moment layer.
19. The method head of claim 18 wherein the low moment layer is an amorphous magnetic alloy.
20. The method of claim 17 wherein the second portion of the head includes at least one high moment layer alternated with at least one dielectric layer.
21. The method of claim 17 wherein the second portion of the head includes at least one high moment layer alternated a soft magnetic material.
22. The method of claim 20 wherein the soft magnetic material is NiFe.
23. The recording head of claim 1 wherein the hot seed layer includes at least one of CoFeN and FeXN, where X includes at least one of Rh, Al, Ta, Zr, and Ti.
24. The method of claim 11 wherein the hot seed layer includes at least one of CoFeN and FeXN, where X includes at least one of Rh, Al, Ta, Zr, and Ti.