Data storage device pre-biasing a spin torque oscillator prior to a write operation
US10410656B1 · kind B1 · utility
3Cited by
8References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 4, 2018 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Dec 4, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a spin torque oscillator (STO). A first bias signal is applied to the STO during a first interval preceding a write operation to write data to the disk, wherein the first bias signal causes the STO to protrude toward the disk. After the first interval, a second bias signal is applied to the STO during a second interval spanning at least part of the write operation, wherein an amplitude of the first bias signal is in the range of 1.1 to 1.5 times an amplitude of the second bias signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.