Abstract:
Described herein is an integrated microelectromechanical structure (30), provided with: a driving mass (3), anchored to a substrate (2) via elastic anchorage elements (8a, 8b) and moved in a plane (xy) with a driving movement; and a first sensing mass (16a'), suspended inside, and coupled to, the driving mass via elastic supporting elements (20') so as to be fixed with respect to the driving mass (3) in the driving movement and to perform a detection movement of rotation out of the plane (xy) in response to a first angular velocity (Ω x ); the elastic anchorage elements (8a, 8b) and the elastic supporting elements (20') cause the detection movement to be decoupled from the driving movement. The elastic supporting elements are coupled to the first sensing mass (16a') at an end portion (31; 31') thereof, and the axis of rotation of the detection movement extends, within the first sensing mass, only through the aforesaid end portion.
Abstract:
A MEMS detection structure (10) comprising a substrate (2) having a top surface (2a) with at least a first fixed-electrode arrangement (5a); a sensing mass (3) extending in a plane (xy) and suspended above the substrate (2) and above the first fixed-electrode arrangement (5a) at a separation distance; and connection elastic elements (8a, 8b) supporting the sensing mass (3) for being freely rotatable out of the plane (xy), modifying the separation distance as a function of a detected quantity along an axis (z) orthogonal to the plane (xy). The MEMS detection structure further comprises a coupling mass (12), suspended above the substrate (2) and connected to the sensing mass (3) via the connection elastic elements (8a, 8b) and an anchoring arrangement (14, 15), which anchors the coupling mass (12) to the substrate (2) with at least a first point of constraint (13), set at a distance from the rotation axis (A) and in a position corresponding to the first fixed-electrode arrangement (5a).
Abstract:
An integrated microelectromechanical structure (30; 30'; 30") is provided with: a driving mass (3), anchored to a substrate (2a) via elastic anchorage elements (8a, 8b) and designed to be actuated in a plane (xy) with a driving movement; and a first sensing mass (15a; 15a') and a second sensing mass (15b; 15b'), suspended within, and coupled to, the driving mass (3) via respective elastic supporting elements (18) so as to be fixed with respect thereto in said driving movement and to perform a respective detection movement in response to an angular velocity. In particular, the first (15a; 15a') and the second (15b; 15b') sensing masses are connected together via elastic coupling elements (32a, 32b), configured to couple their modes of vibration.
Abstract:
An integrated MEMS gyroscope (1; 1'; 1"), is provided with: at least a first driving mass (2a) driven with a first driving movement along a first axis (x) upon biasing of an assembly (13) of driving electrodes, the first driving movement generating at least one sensing movement, in the presence of rotations of the integrated MEMS gyroscope (1; 1'; 1"); and at least a second driving mass (2b) driven with a second driving movement along a second axis (y), transverse to the first axis (x), the second driving movement generating at least a respective sensing movement, in the presence of rotations of the integrated MEMS gyroscope (1; 1'; 1"). The integrated MEMS gyroscope is moreover provided with a first elastic coupling element (12a), which elastically couples the first driving mass (2a) and the second driving mass (2b) in such a way as to couple the first driving movement to the second driving movement with a given ratio of movement.
Abstract:
Integrated microelectromechanical structure (30), provided with: a die (2), having a substrate (2) and a frame (2b), defining inside it a detection region (2c) and having a first side extending along a first horizontal axis (x); a driving mass (3), anchored to the substrate (2), set in the detection region (2c), and rotatable in a plane (xy) with an actuation movement about a vertical axis (z); and first and second pairs (16a',16b';16c',16d') of first sensing masses, suspended inside the driving mass (3) via elastic supporting elements (20) so as to perform a detection movement of rotation out of the plane (xy) in response to a first angular velocity (Ω x ); wherein the first sensing masses of the first pair (16a',16b') and the first sensing masses of the second pair (16c',16d') are aligned in respective directions (x 1 , X 2 ), having non zero inclinations of opposite sign with respect to the first horizontal axis (x).