Systems and methods for providing a pole pedestal for microwave assisted magnetic recording
View Patent ↗Systems and methods for providing a write pole pedestal for microwave assisted magnetic recording systems are provided. One such system includes a magnetic transducer for microwave assisted magnetic recording, the magnetic transducer including a pole including a leading edge and a trailing edge, a trailing shield positioned closer to the pole trailing edge than the pole leading edge, and an energy transducer positioned between the pole trailing edge and the trailing shield, where a trailing parallel side of the trapezoid is smaller than a leading parallel side of the trapezoid.
1. A magnetic transducer for microwave assisted magnetic recording, the magnetic transducer comprising:
a pole comprising a leading edge and a trailing edge;
a trailing shield positioned closer to the pole trailing edge than the pole leading edge; and
an energy transducer positioned between the pole trailing edge and the trailing shield,
wherein a shape of the pole at the trailing edge comprises a trapezoid, wherein a trailing parallel side of the trapezoid is smaller than a leading parallel side of the trapezoid.
2. The magnetic transducer of claim 1 , wherein the leading parallel side of the trapezoid is about collinear with the pole trailing edge.
3. The magnetic transducer of claim 1 , wherein a shape of the pole at the trailing edge comprises an isosceles trapezoid.
4. The magnetic transducer of claim 3 , wherein the energy transducer is closer to the trailing parallel side than the leading parallel side.
5. The magnetic transducer of claim 4 , wherein the energy transducer abuts the trailing parallel side.
6. The magnetic transducer of claim 1 , wherein a shape of the pole at the trailing edge comprises an isosceles trapezoid having a base angle of about 40 to about 80 degrees, wherein the base angle is relative to the leading parallel side of the trapezoid.
7. The magnetic transducer of claim 1 , wherein a shape of the pole air bearing surface at the trailing edge comprises an isosceles trapezoid having a base angle of about 60 degrees, wherein the base angle is relative to the leading parallel side of the trapezoid.
8. The magnetic transducer of claim 1 , wherein the energy transducer comprises a spin torque oscillator.
9. The magnetic transducer of claim 1 , wherein the energy transducer comprises a component selected from the group consisting of a near field optical transducer and a waveguide.
10. A method for fabricating a magnetic transducer for microwave assisted magnetic recording, the method comprising:
depositing a ferromagnetic material for a pole;
planarizing the pole material and thereby forming a pole having a leading edge and a trailing edge;
depositing one or more materials on the planarized pole material to form an energy transducer;
shaping the energy transducer materials such that the energy transducer comprises a preselected shape; and
shaping the pole materials such that the pole air bearing surface comprises a trapezoidal shape at the trailing edge.
11. The method of claim 10 , wherein the shaping of the energy transducer materials comprises:
depositing a mask on preselected portions of the energy transducer materials; and
removing a portion of the energy transducer materials not protected by the mask.
12. The method of claim 11 , wherein the removing the portion of the energy transducer materials not protected by the mask comprises ion milling the portion of the energy transducer materials not protected by the mask.
13. The method of claim 10 , wherein the shaping the pole materials comprises removing portions of the pole materials at a preselected angle.
14. The method of claim 13 :
wherein the removing portions of the pole materials at the preselected angle comprises performing an etching process on the portions of the pole material at the preselected angle, and
wherein the etching process is selected from the group consisting of an ion milling process and a reactive ion etching process.
15. The method of claim 14 , wherein the removing portions of the pole materials at the preselected angle further comprises rotating the pole material during the etching process.
16. The method of claim 10 , wherein the trapezoidal shape comprises an isosceles trapezoid.
17. The method of claim 16 :
wherein the isosceles trapezoid comprises a leading parallel side and a trailing parallel side, wherein the leading parallel side is parallel to the trailing parallel side,
wherein a length of the leading parallel side is greater than a length of the trailing parallel side, and
wherein the energy transducer abuts the trailing parallel side.
18. The method of claim 10 , wherein a shape of the pole at the trailing edge comprises an isosceles trapezoid having a base angle of about 40 to about 80 degrees, wherein the base angle is relative to a leading parallel side of the isosceles trapezoid having a length greater than a trailing parallel side of the isosceles trapezoid.
19. The method of claim 10 , wherein a shape of the pole at the trailing edge comprises an isosceles trapezoid having a base angle of about 60 degrees, wherein the base angle is relative to a leading parallel side of the isosceles trapezoid having a length greater than a trailing parallel side of the isosceles trapezoid.
20. The method of claim 10 , wherein the energy transducer comprises a spin torque oscillator.
21. The method of claim 10 , wherein the energy transducer comprises a component selected from the group consisting of a near field optical transducer and a waveguide.
22. The method of claim 10 , wherein the depositing of the ferromagnetic material for the pole further comprises encapsulating the pole material.
23. The method of claim 10 , wherein the preselected shape of the energy transducer at a bottom surface of the energy transducer comprises about a shape selected from the group consisting of a rectangular shape and a triangular shape.