High frequency magnetic field assisted magnetic recording head
US9007722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2013 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To uniformly determine the positional relationship between a main magnetic pole and a spin torque oscillator while independently optimizing the main magnetic pole and the spin torque oscillator. On a trailing end surface of a main magnetic pole, a step is provided at the boundary between the main magnetic pole and a gap material disposed on both sides thereof, and a spin torque oscillator is formed on the step. The spin torque oscillator is effectively separated into two regions by utilizing the step. Further, a part of the spin torque oscillator is removed so as to disable the unwanted region, thereby realizing a self-alignment type high frequency magnetic field assisted magnetic recording head structure such that the positions of the end portions of the main magnetic pole and the spin torque oscillator are aligned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.