Head gimbal assembly for microwave-assisted magnetic recording in impedance matching between microwave radiation element and microwave transmission line
US8462465B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2012 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Mar 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head gimbal assembly includes a magnetic head slider provided with a recording head element that applies a recording magnetic field to a magnetic recording medium and a suspension that supports the magnetic head slider. The magnetic head slider further includes a microwave radiation element that radiates a microwave magnetic field from a microwave excitation current that is supplied from a microwave generating circuit, and that applies the microwave magnetic field to the magnetic recording medium when the recording head element applies the recording magnetic field to the magnetic recording medium. The suspension includes a microwave transmission line that transmits the microwave excitation current, and the microwave transmission line is provided with a matching circuit to achieve impedance matching with the microwave radiation element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.