Pre-Assisting Microwave-Assisted Magnetic Recording With Spin-Torque Nano-Oscillators
AssigneeHeadway Technologies, Inc.
InventorsHaowen Ren, Wenyu Chen, Yuhui Tang
Life of this patent
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Abstract
The present embodiments relate to a pre-assisting microwave assisted magnetic recording (MAMR) (PA-MAMR) write-head structure where the STO is disposed within a leading shield (LS). The STO can be used to pump energy into the media before the writing process. The STO can also pre-excite the media and let the media oscillation damp over the time and then switch under the writer field. The present embodiments can be easier to increase the magnetic volume and magnetic moment of the free layer, while also achieving a greater oscillation frequency with magnetization oscillations around the axis in the film plane.
Claims20
A method for manufacturing a write head for a disk drive, the method comprising:
- forming a main pole (MP);
- disposing a trailing shield (TS) and a set of side shields (SS) adjacent to the MP;
- disposing a leading edge taper (LET) at a leading side of the MP;
- disposing a leading shield (LS) adjacent to the LET;
- forming a set of insulator layers adjacent to the LET and the LS;
- and
- patterning a spin-torque oscillator (STO) in the LS, wherein the set of insulator layers are disposed on opposing sides of the STO.
A method comprising:
- forming a main pole (MP);
- disposing a leading edge taper (LET) at a leading side of the MP;
- disposing a leading shield (LS) adjacent to the LET;
- forming a set of insulator layers adjacent to the LET and the LS;
- and
- patterning a spin-torque oscillator (STO) in the LS, wherein the STO includes a free magnetic layer to generate a rf field and a pinned magnetic layer as a spin polarizer, wherein the set of insulator layers are disposed on opposing sides of the STO.
Dependencies are inferred from the claim text.