MAMR write head with thermal dissipation conductive guide
The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, a MAMR stack disposed between the trailing shield and the main pole, side shields surrounding at least a portion of the main pole, and a structure disposed between the side shields and the main pole at a media facing surface (WS). The structure is fabricated from a material that is thermally conductive and electrically insulating/dissipative. The material has a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 10 5 Ω*m. The structure helps dissipate joule heating generated from either the main pole or the MAMR stack into surrounding area without electrical shunting, leading to reduced heating or break-down induced failures.
1. A magnetic recording head, comprising:
a trailing shield;
a main pole;
side shields surrounding at least a portion of the main pole;
a stack disposed between the main pole and the trailing shield;
a first structure surrounding at least a portion of the main pole at a media facing surface, wherein the first structure is fabricated from a material having a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 10 5 Ω*m;
a non-magnetic electrically conductive structure disposed between the main pole and the first structure; and
a second structure having first portions and a second portion, wherein the first portions of the second structure are disposed between the trailing shield and the side shields, and the second portion of the second structure is disposed between the trailing shield and the main pole at a location recessed from the media facing surface.
2. The magnetic recording head of claim 1 , wherein the main pole has a first surface at the media facing surface, a second surface adjacent to the first surface, a third surface opposite the second surface, a fourth surface connected to the second surface, and a fifth surface opposite the fourth surface.
3. The magnetic recording head of claim 2 , wherein the first structure surrounds the third surface, the fourth surface, and the fifth surface of the main pole.
4. The magnetic recording head of claim 1 , wherein the non-magnetic electrically conductive structure comprises NiTa, Cr, Cu, Rh, or combination thereof.
5. The magnetic recording head of claim 1 , wherein the first structure is disposed between the side shields and the non-magnetic electrically conductive structure.
6. The magnetic recording head of claim 1 , wherein the second structure is fabricated from a material having a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 10 5 Ω*m.
7. A data storage device comprising the magnetic recording head of claim 1 .
8. The magnetic recording head of claim 1 , wherein the first structure is in contact with the first portions of the second structure, and wherein the second portion of the second structure contacts the stack at a location recessed from the media facing surface.
9. The magnetic recording head of claim 1 , wherein the first structure has a first thickness less than a second thickness of the second structure, and wherein the second thickness of the second structure is about the same as or greater than a third thickness of the stack.
10. The magnetic recording head of claim 1 , wherein the stack comprises a seed layer, a spacer layer disposed on the seed layer, and a magnetic layer disposed on the spacer layer.
11. The magnetic recording head of claim 10 , wherein the magnetic layer is a spin torque layer.
12. The magnetic recording head of claim 10 , wherein the magnetic layer comprises NiFe, CoMnGe, CoFe, or a combination thereof, wherein the seed layer comprises Ta, Cr, Cu, NiAl, Ru, Rh, or a combination thereof, and wherein the spacer layer comprises Cu or AgSn.
13. A magnetic recording head, comprising:
a trailing shield;
a main pole;
a stack disposed between the main pole and the trailing shield; and
means for dissipating heat generated from the main pole or the stack without electrical shunting, wherein the means for dissipating heat surrounds at least a portion of the main pole at a media facing surface.
14. The magnetic recording head of claim 13 , wherein the stack comprises a seed layer, a first magnetic layer disposed on the seed layer, a second magnetic layer, and an interlayer disposed between the first magnetic layer and the second magnetic layer.
15. The magnetic recording head of claim 13 , wherein the stack comprises a seed layer and a non-magnetic gap layer disposed on the seed layer.
16. A data storage device comprising the magnetic recording head of claim 13 .
17. The magnetic recording head of claim 13 , wherein the stack comprises a seed layer, a spacer layer disposed on the seed layer, and a magnetic layer disposed on the spacer layer.
18. The magnetic recording head of claim 17 , wherein the magnetic layer is a spin torque layer.
19. The magnetic recording head of claim 17 , wherein the magnetic layer comprises NiFe, CoMnGe, CoFe, or a combination thereof.
20. The magnetic recording head of claim 17 , wherein the seed layer comprises Ta, Cr, Cu, NiAl, Ru, Rh, or a combination thereof, and wherein the spacer layer comprises Cu or AgSn.
21. A magnetic recording head, comprising:
a trailing shield;
a main pole;
side shields disposed below the trailing shield and adjacent to the main pole;
a stack disposed between the main pole and the trailing shield;
a first structure surrounding at least a portion of the main pole at a media facing surface, wherein the first structure is fabricated from a first material having a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 10 5 Ω*m; and
a second structure comprising first portions disposed between the trailing shield and the side shields, wherein the second structure is fabricated from a second material having a thermal conductivity of at least 50 W/(m*K) and an electrical resistivity of at least 10 5 Ω*m, and wherein the stack is further disposed between the first portions of the second structure at the media facing surface.
22. The magnetic recording head of claim 21 , wherein the main pole has a first surface at the media facing surface, a second surface adjacent to the first surface, a third surface opposite the second surface, a fourth surface connected to the second surface, and a fifth surface opposite the fourth surface, and wherein the first structure surrounds the third surface, the fourth surface, and the fifth surface of the main pole.
23. The magnetic recording head of claim 21 , further comprising a non-magnetic electrically conductive structure disposed between the main pole and the first structure, and wherein the non-magnetic electrically conductive structure comprises NiTa, Cr, Cu, Rh, or combination thereof.
24. The magnetic recording head of claim 23 , wherein the first structure is disposed between the side shields and the non-magnetic electrically conductive structure, and wherein the first structure is in contact with the first portions of the second structure.
25. The magnetic recording head of claim 21 , wherein the second structure further comprises a second portion recessed from the media facing surface, the second portion being disposed between the trailing shield and the main pole.
26. The magnetic recording head of claim 25 , wherein the second portion of the second structure contacts the stack at a location recessed from the media facing surface.
27. The magnetic recording head of claim 21 , wherein the first structure has a first thickness less than a second thickness of the second structure.
28. The magnetic recording head of claim 21 , wherein a second thickness of the second structure is about the same as or about 1.5 times greater than a third thickness of the stack.
29. The magnetic recording head of claim 21 , wherein the first material of the first structure is the same as the second material of the second structure.
30. A data storage device comprising the magnetic recording head of claim 21 .