Multilayer disk drive motors having out-of-plane bending
US9564154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2016 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Mar 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments concern a gimbaled flexure having a dual stage actuation structure. The flexure comprises a gimbal on which a motor is mounted. The motor comprises a first and second terminals and a plurality of actuator layers formed from a piezoelectric material. The plurality of actuator layers comprise serially stacked first, second, and third actuator layers. The plurality of actuator layers are respectively poled and connected to the first and second terminals such that both of the first and second actuator layers expand while the third actuator layer contracts in response to application of a signal across the first and second terminals. The differential motion of the plurality of layers in the motor cause the motor to curl about the contracting third actuator layer. The curling motion causes a portion of the flexure to preferentially curl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.