Implementing contact sensing with near field transducer (NFT) and in-drive NFT characterization diagnostics in heat-assisted magnetic recording (HAMR) HDD
US8908483B1 · kind B1 · utility
24Cited by
11References
20Claims
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Key dates
| Filing date | May 30, 2014 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | May 30, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus, and system for implementing contact sensing are provided using a near field transducer (NFT) and in-drive NFT characterization diagnostics for heat-assisted magnetic recording (HAMR) hard disk drives (HDDs). NFT resistance is monitored and used to determine head to disk contact and spacing. NFT resistance is used to detect NFT head wear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.