Microwave-assisted magnetic recording (MAMR) head with a current confinement structure
US8837088B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2013 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Sep 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a magnetic head includes a main pole configured to emit a recording magnetic field for affecting a magnetic medium, the main pole serving as a first electrode and having a front portion at an air bearing surface (ABS) of the magnetic head and a rear portion extending from the front portion in an element height direction perpendicular to the ABS, wherein an upper surface of the main pole has a step transitioning from the front portion to the rear portion, a conductive layer positioned above the main pole, the conductive layer serving as a second electrode, a microwave oscillator positioned between the main pole and the conductive layer at the ABS of the Magnetic head and extending beyond the step in the element height direction, and a current confinement layer positioned between the microwave oscillator and the rear portion of the main pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.