公开(公告)号：US20230253895A1

公开(公告)日：2023-08-10

申请号：US18161740

申请日：2023-01-30

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Andrea OPRENI ,  Valentina ZEGA ,  Attilio FRANGI ,  Gabriele GATTERE ,  Manuel RIANI

IPC: H02N1/00 ,  B81B3/00

CPC classification number: H02N1/008 ,  B81B3/0021 ,  B81B2201/033 ,  B81B2203/053 ,  B81B2203/0136

Abstract: MEMS actuator including: a substrate; a first and a second semiconductive layer; a frame including transverse regions formed by the second semiconductive layer, elongated parallel to a first direction and offset along a second direction, the frame being movable parallel to the second direction. The MEMS actuator includes, for each transverse region: corresponding front rotor regions, which are fixed to the transverse region and are suspended above the substrate; a first and a second stator region, which are formed by the first semiconductive layer in such a way that, when the frame is in rest position, the transverse region is laterally offset with respect to the first and the second stator regions and a first front rotor region partially faces the first stator region, and in such a way that, during a translation of the frame along the second direction, the first and/or a second front rotor region at least partially face the second stator region, when the transverse region begins to superimpose on the first stator region.

公开(公告)号：US20230194910A1

公开(公告)日：2023-06-22

申请号：US17559534

申请日：2021-12-22

Applicant: STMicroelectronics S.r.l. ,  Politecnico Di Milano

Inventor： Valentina ZEGA ,  Chiara GAZZOLA ,  Luca Giuseppe FALORNI ,  Attilio FRANGI

IPC: G02F1/035

CPC classification number: G02F1/035 ,  G02F2202/32

Abstract: A MEMS based device includes a phononic crystal body formed from unit cells and having a defect line extending through the phononic crystal body. Unit cells inside of the defect line lack a same phononic bandgap as the unit cells outside of the defect line. An input MEMS resonator is mechanically coupled to a first end of the defect line, and an output MEMS resonator is mechanically coupled to a second end of the defect line. Each of the unit cells outside of the defect line has an identical geometry. The input MEMS resonator and output MEMS resonator each have a natural frequency within the same phononic bandgap possessed by the unit cells outside of the defect line. There may be more than one defect line, and in such cases, the MEMS device may include more than one input MEMS resonator and/or more than one output MEMS resonator.