公开(公告)号：US20230314257A1

公开(公告)日：2023-10-05

申请号：US18169818

申请日：2023-02-15

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Enri DUQI ,  Patrick FEDELI ,  Nicolo' MANCA ,  Silvia ADORNO

IPC: G01L27/00

CPC classification number: G01L27/005 ,  H02J50/10

Abstract: Method for determining a first and a second calibrated value of atmospheric pressure, performed by an electronic apparatus comprising a fixed device and a first and a second movable device comprising respectively a first and a second movable barometer. The method comprises: determining whether the movable devices are being inductively charged by the fixed device; if so, acquiring respective measured values of atmospheric pressure through the movable barometers, and a reference value of atmospheric pressure in a common reference point of the electronic apparatus, the movable barometers being at respective predefined height differences with respect to the common reference point; calculating respective pressure differences as a function of the measured values of atmospheric pressure and of the reference value of atmospheric pressure; and when the movable devices are not being charged, acquiring new measured values of atmospheric pressure through the movable barometers, and determining the respective calibrated values of atmospheric pressure as a function of the new measured values of atmospheric pressure and of the pressure differences.

公开(公告)号：US20220033254A1

公开(公告)日：2022-02-03

申请号：US17385555

申请日：2021-07-26

Applicant: STMicroelectronics S.r.l.

Inventor： Gabriele GATTERE ,  Patrick FEDELI ,  Carlo VALZASINA

IPC: B81B7/02 ,  G01P15/09 ,  B81B3/00

Abstract: A MEMS accelerometer includes a supporting structure, at least one deformable group and one second deformable group, which include, respectively, a first deformable cantilever element and a second deformable cantilever element, which each have a respective first end, which is fixed to the supporting structure, and a respective second end. The first and second deformable groups further include, respectively, a first piezoelectric detection structure and a second piezoelectric detection structure. The MEMS accelerometer further includes: a first mobile mass and a second mobile mass, which are fixed, respectively, to the second ends of the first and second deformable cantilever elements and are vertically staggered with respect to the first and second deformable cantilever elements, respectively; and a first elastic structure, which elastically couples the first and second mobile masses.

公开(公告)号：US20240175682A1

公开(公告)日：2024-05-30

申请号：US18515075

申请日：2023-11-20

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Luca GUERINONI ,  Patrick FEDELI ,  Luca Giuseppe FALORNI

IPC: G01C19/5712 ,  G01C25/00

CPC classification number: G01C19/5712 ,  G01C25/00

Abstract: A microelectromechanical device includes: a support body; at least one movable mass of semiconductor material, elastically constrained to the support body so as to be able to oscillate; fixed detection electrodes rigidly connected to the support body and capacitively coupled to the at least one movable mass; and at least one test structure of semiconductor material, rigidly connected to the support body and distinct from the fixed detection electrodes. The test structure is capacitively coupled to the at least one movable mass and is configured to apply electrostatic forces to the at least one movable mass in response to a voltage between the test structure and the at least one movable mass.

公开(公告)号：US20230228570A1

公开(公告)日：2023-07-20

申请号：US18150720

申请日：2023-01-05

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Patrick FEDELI ,  Luca GUERINONI ,  Paola CARULLI ,  Luca Giuseppe FALORNI

IPC: G01C19/5712

CPC classification number: G01C19/5712

Abstract: A microelectromechanical gyroscope is provided with a detection structure having: a substrate with a top surface parallel to a horizontal plane (xy); a mobile mass, suspended above the substrate to perform, as a function of a first angular velocity (Ωx) around a first axis (x) of the horizontal plane (xy), at least a first detection movement of rotation around a second axis (y) of the horizontal plane; and a first and a second stator elements integral with the substrate and arranged underneath the mobile mass to define a capacitive coupling, a capacitance value thereof is indicative of the first angular velocity (Ωx). The detection structure has a single mechanical anchorage structure for anchoring both the mobile mass and the stator elements to the substrate, arranged internally with respect to the mobile mass, which is coupled to this single mechanical anchorage structure by coupling elastic elements yielding to torsion around the second axis; the stator elements are integrally coupled to the single mechanical anchorage structure in an arrangement suspended above the top surface of the substrate.

公开(公告)号：US20240142235A1

公开(公告)日：2024-05-02

申请号：US18490392

申请日：2023-10-19

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Paola CARULLI ,  Luca Giuseppe FALORNI ,  Patrick FEDELI ,  Luca GUERINONI

IPC: G01C19/5762

CPC classification number: G01C19/5762

Abstract: A microelectromechanical gyroscope with detection along a vertical axis is provided with a detection structure having a movable structure, suspended above a substrate so as to perform, as a function of an angular velocity around the vertical axis a sense movement along a first horizontal axis. The movable structure has at least one drive mass internally defining a window, elastically coupled to a rotor anchor, at an anchoring region, through elastic anchoring elements; at least one bridge element, rigid and of a conductive material, cantilevered suspended and extending within the window along the first horizontal axis, elastically coupled to the drive mass; movable electrodes, carried integrally by the bridge element with extension along a second horizontal axis. The detection structure also has stator electrodes, arranged in the window and interdigitated with the movable electrodes, at a certain separation distance below the bridge element, which extends longitudinally above the same stator electrodes and the movable electrodes.

公开(公告)号：US20220380202A1

公开(公告)日：2022-12-01

申请号：US17744310

申请日：2022-05-13

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Luca GUERINONI ,  Patrick FEDELI ,  Luca Giuseppe FALORNI

IPC: B81B7/02 ,  B81B3/00

Abstract: A microelectromechanical device includes a substrate, a first structural layer, and a second structural layer of semiconductor material. A sensing mass extends in the first structural layer and is coupled to the substrate by first elastic connections to enable oscillation of the sensing mass in a sensing direction perpendicular to the substrate by a maximum amount relative to a resting position of the sensing mass. An out-of-plane stopper structure includes an anchorage fixed to the substrate and a mechanical end-of-travel structure, which extends in the second structural layer, faces the sensing mass, and is separated therefrom by a gap having a width smaller than the maximum displacement distance of the sensing mass. The mechanical end-of-travel structure is coupled to the anchorage by second elastic connections that enable movement of the mechanical end-of-travel structure in the sensing direction in response to an impact of the sensing mass.

公开(公告)号：US20240003685A1

公开(公告)日：2024-01-04

申请号：US18339084

申请日：2023-06-21

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Luca Giuseppe FALORNI ,  Patrick FEDELI ,  Gabriele GATTERE ,  Carlo VALZASINA ,  Paola CARULLI

IPC: G01C19/5733 ,  G01C19/5712 ,  G01C19/5769

CPC classification number: G01C19/5733 ,  G01C19/5712 ,  G01C19/5769

Abstract: MEMS gyroscope, having a first movable mass configured to move with respect to a fixed structure along a first drive direction and along a first sense direction, transverse to the first drive direction; a first drive assembly, coupled to the first movable mass and configured to generate a first alternate drive movement; a first drive elastic structure, coupled to the first movable mass and to the first drive assembly, rigid in the first drive direction and compliant in the first sense direction; a second movable mass, configured to move with respect to the fixed structure in a second drive direction parallel to the first drive direction and in a second sense direction parallel to the first sense direction; a second drive assembly, coupled to the second movable mass and configured to generate a second alternate drive movement in the second drive direction; and a second drive elastic structure, coupled to the second movable mass and to the second drive assembly, rigid in the second drive direction and compliant in the second sense direction.

公开(公告)号：US20230322548A1

公开(公告)日：2023-10-12

申请号：US18185189

申请日：2023-03-16

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Luca Giuseppe FALORNI ,  Paola CARULLI ,  Patrick FEDELI ,  Luca GUERINONI

IPC: B81B7/02

CPC classification number: B81B7/02 ,  B81B2201/0228 ,  B81B2203/0109 ,  B81B2203/0163 ,  B81B2203/0307 ,  B81B2203/04

Abstract: A MEMS angular rate sensor is presented with two pairs of suspended masses that are micromachined on a semiconductor layer. A first pair includes two masses opposite to and in mirror image of each other. The first pair of masses has driving structures to generate a mechanical oscillation in a linear direction. A second pair of masses includes two masses opposite to and in mirror image of each other. The second pair of masses is coupled to the first pair of driving masses with coupling elements. The two pairs of masses are coupled to a central bridge. The central bridge has a differential configuration to reject any external disturbances. Each of the masses of the two pairs of masses includes different portions to detect different linear and angular movements.