Microelectromechanical structure with enhanced rejection of acceleration noise
First Claim
1. A structure, comprising:
- a substrate;
a plurality of driving electrodes anchored to the substrate;
a first anchorage formed on the substrate;
a second anchorage formed on the substrate;
a first driving mass coupled to the first anchorage and configured to be driven by at least some of the plurality of driving electrodes;
a second driving mass coupled to the second anchorage and configured to be driven by at least some of the plurality of driving electrodes;
a first sensing mass elastically coupled to the first driving mass, the first sensing mass having a first surface;
a second sensing mass elastically coupled to the second driving mass, the second sensing mass having a second surface facing the first surface; and
a rigid element coupled between the first and second sensing masses, the rigid element having a longitudinal extension that is transverse to the first and second surfaces.
0 Assignments
0 Petitions
Accused Products
Abstract
An integrated MEMS structure includes a driving assembly anchored to a substrate and actuated with a driving movement. A pair of sensing masses suspended above the substrate and coupled to the driving assembly via elastic elements is fixed in the driving movement and performs a movement along a first direction of detection, in response to an external stress. A coupling assembly couples the pair of sensing masses mechanically to couple the vibration modes. The coupling assembly is formed by a rigid element, which connects the sensing masses and has a point of constraint in an intermediate position between the sensing masses, and elastic coupling elements for coupling the rigid element to the sensing masses to present a first stiffness to a movement in phase-opposition and a second stiffness, greater than the first, to a movement in phase, of the sensing masses along the direction of detection.
69 Citations
24 Claims
-
1. A structure, comprising:
-
a substrate; a plurality of driving electrodes anchored to the substrate; a first anchorage formed on the substrate; a second anchorage formed on the substrate; a first driving mass coupled to the first anchorage and configured to be driven by at least some of the plurality of driving electrodes; a second driving mass coupled to the second anchorage and configured to be driven by at least some of the plurality of driving electrodes; a first sensing mass elastically coupled to the first driving mass, the first sensing mass having a first surface; a second sensing mass elastically coupled to the second driving mass, the second sensing mass having a second surface facing the first surface; and a rigid element coupled between the first and second sensing masses, the rigid element having a longitudinal extension that is transverse to the first and second surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A system, comprising:
-
a driving circuit; a reading circuit; a structure coupled to the driving circuit and to the reading circuit, the structure including; a substrate; a plurality of driving electrodes anchored to the substrate and coupled to the driving circuit; a first driving mass suspended above the substrate and electrically coupled to at least some of the plurality of driving electrodes; a second driving mass suspended above the substrate and electrically coupled to at least some of the plurality of driving electrodes; a first sensing mass elastically coupled to the first driving mass, the first sensing mass having a first surface; a second sensing mass elastically coupled to the second driving mass, the second sensing mass having a second surface facing the first surface; and a rigid element coupled between the first and second sensing masses, the a rigid element extending transversely between the first and second surfaces. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A method, comprising:
forming a structure integrated with a substrate of a die, the forming of the structure including; coupling a first driving mass to the substrate; coupling a second driving mass to the substrate adjacent to the first driving mass; coupling a driving assembly to the first driving mass and to the second driving mass; elastically coupling a first sensing mass to the first driving mass, the first sensing mass having a first surface; elastically coupling a second sensing mass to the second driving mass, the second sensing mass having a second surface facing the first surface; and coupling a rigid element between the first and second sensing masses, the rigid element extending transversely to the first and second surfaces. - View Dependent Claims (20, 21, 22, 23, 24)
Specification