Patent ID: 11953813
Assignee: STMICROELECTRONICS S.R.L.
Field: Optics (Instruments)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A microelectromechanical device, comprising:
a fixed structure defining a cavity;
a tiltable structure elastically suspended in the cavity and having a main extension in a horizontal plane; and
a piezoelectrically driven actuation structure configured to cause rotation of the tiltable structure about at least a first rotation axis parallel to a first horizontal axis of the horizontal plane, with the piezoelectrically driven actuation structure being interposed between the tiltable structure and the fixed structure;
the piezoelectrically driven actuation structure comprising at least a first pair of driving arms which carry respective regions of piezoelectric material;
the tiltable structure elastically being coupled to the fixed structure at the first rotation axis by elastic suspension elements which have a high stiffness with respect to movements out of the horizontal plane but are compliant with respect to torsion about the first rotation axis, with the elastic suspension elements extending along the first rotation axis between a central portion of opposite sides of the tiltable structure and the fixed structure; and
wherein the first pair of driving arms are elastically coupled to the tiltable structure on opposite sides of the first rotation axis by respective decoupling elastic elements having a high stiffness with respect to movements out of the horizontal plane but being compliant with respect to torsion about the first rotation axis.