Near-field transducer efficiency monitoring system
US9142244B2 · kind B2 · utility
5Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2014 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Apr 6, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system may have a data storage medium that contains at least one data bit that is accessed by a transducing head that has a near-field transducer. A controller can be connected to the transducing head and store a plurality of near-field transducer operating currents in a memory. The controller may identify a change in efficiency of the near-field transducer from the plurality of near-field transducer operating currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.