Write pole wrap-around shield with gap lamination
A data writer can have at least a write pole laterally disposed between first and second side shields and vertically disposed between a wrap-around shield and a front shield. The write pole may be separated from the side shields and the wrap-around shield by a lamination of first and second non-magnetic layers.
1. An apparatus comprising a write pole laterally disposed between first and second side shields and vertically disposed between a wrap-around shield and a front shield, the write pole separated from the side shields and the wrap-around shield by a lamination of first and second dielectric layers, the first dielectric layer having a different magnetic flux density than the second dielectric layer.
2. The apparatus of claim 1 , wherein the write pole comprises a leading tip and a trailing edge, the leading tip proximal the wrap-around shield and the trailing edge proximal the front shield.
3. The apparatus of claim 2 , wherein the first and second dielectric layers each continuously extend from a first tip of the trailing edge proximal the first side shield around the leading tip to a second tip of the trailing edge proximal the second side shield.
4. The apparatus of claim 1 , wherein the first dielectric layer has a smaller magnetic flux density than the second dielectric layer, the first dielectric layer positioned between the write pole and the second dielectric layer.
5. The apparatus of claim 1 , wherein the first and second dielectric layers have different thicknesses.
6. The apparatus of claim 1 , wherein the write pole has a trapezoidal shape on an air bearing surface (ABS).
7. The apparatus of claim 1 , wherein the wrap-around shield seamlessly extends from the respective side shields on an air bearing surface (ABS).
8. An apparatus comprising a write pole laterally disposed between first and second side shields and vertically disposed between a wrap-around shield and a front shield, the write pole separated from the front shield by a first dielectric layer and separated from each side and wrap-around shield by a lamination of the first dielectric layer, a second dielectric layer, and a third dielectric layer, the second dielectric layer having a greater magnetic flux density than the first dielectric layer and a smaller magnetic flux density than the third dielectric layer.
9. The apparatus of claim 8 , wherein a letterbox notch is positioned between a trailing edge of the write pole and the front shield, the letterbox notch filled with the first dielectric layer.
10. The apparatus of claim 8 , wherein the write pole is separated from the front shield by a smaller distance than from the first side, second side, or wrap-around shields.
11. The apparatus of claim 8 , wherein the second dielectric layer contacts and is disposed between the first dielectric layer and the third dielectric layer.
12. The apparatus of claim 11 , wherein each dielectric layer has a greater than zero magnetic flux density.
13. The apparatus of claim 8 , wherein the side shields, front shield, and wrap-around shield are coupled together.
14. A method comprising:
forming a wrap-around shield;
depositing first and second side shields atop the wrap-around shield to define a write pole trench;
forming a lamination of a first and second dielectric layers in the write pole trench, the first dielectric layer having a different magnetic flux density than the second dielectric layer; and
depositing a write pole in the write pole trench, the write pole separated from each side shield and the wrap-around shield by the first and second dielectric layers.
15. The method of claim 14 , wherein an etch stop layer is positioned on the wrap-around shield.
16. The method of claim 14 , wherein each side shield is electroplated.
17. The method of claim 14 , wherein the wrap-around shield comprises a leading shield layer contacting the first and second side shields.
18. The method of claim 17 , wherein the leading shield layer is a different material than the first and second side shields.
19. The method of claim 14 , wherein the wrap-around shield and a front shield are respectively formed atop first and second seed layers.
20. The method of claim 14 , wherein the first dielectric layer extends no farther downtrack than a trailing edge of the write pole, the second dielectric layer extending farther downtrack than the trailing edge.