Piezoelectric-based microactuator arrangement for mitigating out-of-plane force and phase variation of flexure vibration
US11152024B1 · kind B1 · utility
2Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2020 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Mar 30, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An approach to a piezoelectric (PZT) device, such as a hard disk drive microactuator, includes one or more layers of poled PZT material, with top and bottom surfaces coupled with respective electrode layers coupled with a power source to drive the active PZT layer(s). The electrode layers have different thicknesses, where the particular thicknesses may be configured to mitigate the variation of out-of-plane motion or bending associated with operational variations in the z-height between a corresponding actuator arm and recording medium and, likewise, the phase variation of flexure vibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.