Resistance temperature sensors for head-media and asperity detection
US8737009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2011 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Feb 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A temperature sensor of a head transducer measures temperature near or at the close point. The measured temperature varies in response to changes in spacing between the head transducer and a magnetic recording medium. A detector is coupled to the temperature sensor and is configured to detect a change in a DC component of the measured temperature indicative of onset of contact between the head transducer and the medium. Another head transducer configuration includes a sensor having a sensing element with a high temperature coefficient of resistance to interact with asperities of the medium. Electrically conductive leads are connected to the sensing element and have a low temperature coefficient of resistance relative to that of the sensing element, such thermally induced resistance changes in the leads have a negligible effect on a response of the sensing element to contact with the asperities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.