Thermal fly height calibration for data storage device
US12417786B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2024 |
| Grant date | Sep 16, 2025 |
| Priority date | — |
| Expiry date | Aug 26, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A Data Storage Device (DSD) includes a disk and a slider. A change in distance between the slider and the disk is determined by applying a first voltage to the slider that increases an electrostatic force between the slider and the disk. The change in distance is approximately the same across a surface of the slider facing the disk. A first power supplied to the heating element is determined that causes thermal expansion of a portion of the slider until making disk contact without applying the first voltage. A second power supplied to the heating element is determined that causes a reduced thermal expansion of the portion until making disk contact while applying the first voltage. A first power setting is calibrated based on a correlation between the determined change in distance and a difference between the first and second powers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.