Heat-assisted magnetic recording device capable of providing negative electrical potential at NFT
US10910007B1 · kind B1 · utility
2Cited by
16References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2020 |
| Grant date | Feb 2, 2021 |
| Priority date | — |
| Expiry date | Feb 14, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording (HAMR) hard disk drive has a gas-bearing slider supporting a near-field transducer (NFT) and a NFT temperature sensor (NTS). An optional first IVC circuitry may provide a bias voltage to the slider body to assure substantially zero electrical potential between the slider body and the disk to minimize slider-disk contact and lubrication pick-up. A second IVC circuitry operates independently of the first IVC circuitry and provides a negative bias voltage to the NTS (and the connected NFT) relative to the disk to minimize the adverse effects of excessive heating on the NFT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.