Write heads configured to redirect current
View Patent ↗Embodiments of the present disclosure generally relate to data storage devices, and more specifically, to storage devices employing an energy-assisted magnetic recording write head. The write head may comprise a main pole, a trailing shield, a conducting gap disposed between the main pole and the trailing shield, and one or more current blockers. The conducting gap may be conformal with the main pole. The one or more current blockers may be configured to direct the current from the main pole to the trailing shield through the conducting gap. The one or more current blockers may be further configured to recess the conducting gap away from the media facing surface. The one or more current blockers may be configured to direct the current away from a media facing surface of the write head.
1. A write head, comprising:
a trailing shield;
a main pole disposed adjacent to the trailing shield;
a first current blocker disposed on the main pole, wherein the first current blocker is disposed at a media facing surface; and
a conducting gap disposed adjacent to the first current blocker and recessed from the media facing surface, wherein the conducting gap extends from the main pole to the trailing shield, wherein the first current blocker is configured to recess the conducting gap away from the media facing surface, wherein the first current blocker comprises a first portion and a second portion, the first portion extending from the media facing surface to the second portion, and the second portion having a greater height than the first portion.
2. The write head of claim 1 , wherein the conducting gap is conformal with the main pole.
3. The write head of claim 1 , wherein the conducting gap is non-conformal with the main pole.
4. The write head of claim 1 , wherein the first current blocker comprises alumina.
5. The write head of claim 1 , wherein the second portion of the first current blocker is the same height as the conducting gap.
6. A storage device comprising the write head of claim 1 .
7. A write head, comprising:
a main pole;
a trailing shield disposed adjacent to the main pole;
a conducting gap disposed between the main pole and the trailing shield, wherein the conducting gap has a first end disposed at a media facing surface and a second end opposite the media facing surface;
a first current blocker disposed on the main pole, wherein the first current blocker is disposed at the media facing surface, and wherein the first current blocker is shorter than the conducing gap;
a non-magnetic metal layer disposed on the main pole, wherein the non-magnetic metal layer is recessed from the media facing surface, and wherein the non-magnetic metal layer overlaps with a portion of the conducting gap;
a second current blocker disposed on the non-magnetic metal layer, wherein the second current blocker is aligned with the second end of the conducting gap; and
a current channel defined between the first current blocker and the second current blocker.
8. The write head of claim 7 , wherein the conducting gap is conformal with the main pole.
9. The write head of claim 7 , wherein the conducting gap is non-conformal with the main pole.
10. The write head of claim 9 , wherein the second end of the conducting gap has a smaller width than the main pole.
11. The write head of claim 7 , wherein the first current blocker and the second current blocker are comprised of the same material.
12. The write head of claim 7 , wherein the conducting gap is disposed over the first current blocker.
13. A storage device comprising the write head of claim 7 .
14. A storage device, comprising:
a write head, wherein the write head comprises:
a main pole;
a trailing shield disposed adjacent to the main pole;
a conducting gap disposed between the main pole and the trailing shield, wherein the conducting gap is conformal with the main pole, and wherein the conducting gap has a first end disposed at a media facing surface; and
a non-magnetic metal layer disposed on the main pole, wherein the non-magnetic metal layer is recessed from the media facing surface, and wherein the non-magnetic metal layer overlaps with a portion of the conducting gap.
15. The storage device of claim 14 , wherein the write head further comprises a trailing gap disposed adjacent to the conducting gap.
16. The storage device of claim 15 , wherein the trailing gap and the conducting gap comprise different materials.