Magnetic head provided spin torque oscillator with low drive voltage for microwave assisted magnetic recording
US9202484B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2015 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Jan 9, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments disclosed herein generally relate to a MAMR head. The MAMR head includes an STO. The STO has a first surface at a media facing surface, and a portion of the first surface has a trapezoidal shape. Having this configuration, the acute angles of the trapezoidal shaped portion provide a greater width of the STO at the media facing surface, which protect the main pole from over-etching during the fabrication of the STO. In addition, the acute angles of the trapezoidal shaped portion of the first surface are large enough to keep a low STO driving voltage and provide the MAMR head with a long operation lifetime and higher reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.