Asperity and head-media contact detection using multi-stage temperature coefficient of resistance sensor
US9373361B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2015 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Aug 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/121
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.