MAMR write head with thermal dissipation conductive guide

Patent metadata

Field	Value
Publication number	US-10762918-B2
Application number	US-202016828901-A
Country	US
Kind code	B2
Filing date	Mar 24, 2020
Priority date	Dec 19, 2017
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

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 (MFS). 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 105 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.

First claim

The invention claimed is:

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 selected from the group consisting of:
aluminum nitride, silicon carbide, beryllium oxide, gallium nitride, gallium phosphide, hexagonal boron nitride, cubic boron nitride, boron arsenide, gamma magnesium aluminate, zinc oxide, silicon, carbon, beryllium, tungsten, iridium, rhodium, molybdenum, diamond like carbon, and combination thereof; 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 first structure is disposed between the side shields and the main pole.

3. The magnetic recording head of claim 2 , further comprising a non-magnetic electrically conductive structure disposed between the main pole and the first structure, wherein the non-magnetic electrically conductive structure is in contact with the main pole and the first structure, and wherein the first structure is in contact with the side shields.

4. The magnetic recording head of claim 1 , wherein each of the first portions of the second structure has a non-uniform thickness, and the second portion of the second structure has a non-uniform thickness.

5. The magnetic recording head of claim 1 , wherein each of the first portions of the second structure has a uniform thickness, and the second portion of the second structure has a uniform thickness.

6. The magnetic recording head of claim 1 , wherein the second structure is fabricated from a same material as the first structure.

7. 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.

8. The magnetic recording head of claim 1 , wherein the stack comprises a spin torque layer.

9. A data storage device comprising the magnetic recording head of claim 1 .

10. 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; and
a first structure disposed between the trailing shield and the side shields, wherein the first structure comprises:
at least one layer of gallium nitride, gallium phosphide, hexagonal boron nitride, cubic boron nitride, boron arsenide, gamma magnesium aluminate, silicon, carbon, beryllium, tungsten, iridium, rhodium, molybdenum, diamond like carbon, or zinc oxide; and
at least one layer of aluminum oxide, aluminum nitride, or silicon carbide.

11. The magnetic recording head of claim 10 , wherein the first structure comprises:
a layer of gallium nitride, gallium phosphide, hexagonal boron nitride, cubic boron nitride, boron arsenide, gamma magnesium aluminate, silicon, carbon, beryllium, tungsten, iridium, molybdenum, diamond like carbon, or zinc oxide; and
a layer of aluminum oxide, aluminum nitride, or silicon carbide.

12. The magnetic recording head of claim 10 , wherein the first structure comprises a silicon layer and an aluminum oxide layer.

13. The magnetic recording head of claim 10 , wherein the first structure comprises first portions and a second portion, wherein the first portions of the first structure are disposed between the trailing shield and the side shields, and the second portion of the first structure is disposed between the trailing shield and the main pole at a location recessed from a media facing surface.

14. The magnetic recording head of claim 13 , wherein each of the first portions has a portion disposed on a taper of a corresponding side shield of the side shields, and the second portion has a portion disposed on a trailing taper of the main pole.

15. The magnetic recording head of claim 13 , further comprising a second structure surrounding at least a portion of the main pole, wherein the second structure is fabricated from a same material as the first structure.

16. The magnetic recording head of claim 10 , wherein the stack comprises a seed layer, a spacer layer disposed on the seed layer, and a magnetic layer disposed on the spacer layer.

17. The magnetic recording head of claim 16 , wherein:
the magnetic layer is a spin torque layer;
the magnetic layer comprises NiFe, CoMnGe, CoFe, or a combination thereof; and
the seed layer comprises Ta, Cr, Cu, NiAl, Ru, Rh, or a combination thereof, and wherein the spacer layer comprises Cu or AgSn.

18. A data storage device comprising the magnetic recording head of claim 10 .

19. A magnetic recording head, comprising:
a trailing shield;
a main pole comprising a first surface, a second surface, a third surface, and a fourth surface;
a stack disposed between the first surface of the main pole and the trailing shield;
a first structure surrounding the second surface, the third surface, and the fourth surface of the main pole at a media facing surface, wherein the first structure is fabricated from a material selected from the group consisting of:
aluminum nitride, silicon carbide, beryllium oxide, gallium nitride, gallium phosphide, hexagonal boron nitride, cubic boron nitride, boron arsenide, gamma magnesium aluminate, zinc oxide, silicon, carbon, beryllium, tungsten, iridium, rhodium, molybdenum, diamond like carbon, and combination thereof; and

a second structure disposed in contact with the trailing shield, the main pole, and the stack, wherein the second structure comprises:
at least one layer of gallium nitride, gallium phosphide, hexagonal boron nitride, cubic boron nitride, boron arsenide, gamma magnesium aluminate, silicon, carbon, beryllium, tungsten, iridium, rhodium, molybdenum, diamond like carbon, or zinc oxide; and

at least one layer of aluminum oxide, aluminum nitride, or silicon carbide.

20. A data storage device comprising the magnetic recording head of claim 19 .

Assignees

• Western Digital Tech Inc

Inventors

• Le Quang
• Jiang Hongquan
• Shi Ning
• Zeltser Alexander M

Classifications

• G11B5/314

  where the layers are extra layers normally not provided in the transducing structure, e.g. optical layers (G11B5/3196 takes precedence) · CPC title

• G11B5/7368 Primary

  Non-polymeric layer under the lowermost magnetic recording layer (base layers having a non-magnetic layer under a soft magnetic layer G11B5/736; magnetic recording media substrates G11B5/739) · CPC title

• G11B5/3133 Primary

  including layers not usually being a part of the electromagnetic transducer structure and providing additional features, e.g. for improving heat radiation, reduction of power dissipation, adaptations for measurement or indication of gap depth or other properties of the structure (G11B5/3106 takes precedence) · CPC title

• G11B2005/0024

  Microwave assisted recording · CPC title

• G11B5/3146

  magnetic layers · CPC title