Abstract:
A MEMS type inertial sensor comprising a support structure having at least a first seismic body and a second seismic body connected thereto by resilient means in order to be movable in a suspension plane, transducers for maintaining the seismic bodies in vibration and for determining movements of the seismic bodies in the suspension plane, and a control unit connected to the transducers by electrical conductor means. The transducers comprise at least one electrode secured to the first seismic body and at least one electrode secured to the second seismic body, the two electrodes being arranged to enable relative movements of the seismic bodies relative to each other in the suspension plane to be measured directly.
Abstract:
A capacitive micromachined ultrasonic transducer (CMUT) and methods of forming the same are disclosed herein. In one implementation, the CMUT comprises a glass substrate having a cavity; a patterned metal bottom electrode situated within the cavity of the glass substrate; and a vibrating plate comprising at least a conducting layer, wherein the vibrating plate is anodically bonded to the glass substrate to form an air-tight seal between the vibrating plate and the substrate and wherein a pressure inside the cavity is less than atmospheric pressure (i.e., a vacuum). In another implementation, the CMUT comprises a glass substrate with Through-Glass-Via (TGV) interconnects, wherein a metal electrode is electrically connected to a TGV and wherein said metal electrode can be in the bottom of a cavity of the glass substrate or on the vibrating plate.
Abstract:
A MEMS resonator includes a main substrate forming a receiving part at a center of the main substrate; a mass body having one end part and a center part elastically supported by both sides of the main substrate; a driving unit configured at one side of the receiving part on the main substrate and producing a driving torque by a voltage applied to both sides of the one end part of the mass body to move a position of the mass body with respect to the main substrate; and a tuning part including a pair of tuning units provided symmetrically with respect to the second elastic member, and having a beam member changing a length of the second elastic member by an actuating operation of each tuning unit to control a frequency.
Abstract:
A MEMS speaker that includes a control unit and multiple MEMS elements that include a membrane positioned in a first plane, a blind that is positioned in a second plane and a shutter that is positioned in a third plane. The control unit is configured to control the multiple MEMS elements to operate in an audio output mode or an ultrasonic output mode. The MEMS speaker is configured, when operating in the ultrasonic output mode, to oscillate at least one of the membrane, blind and shutter thereby generating an ultrasonic signal without audio-modulating the ultrasonic signal. The MEMS speaker is configured, when operating in the audio output mode, to oscillate the membrane thereby generating the ultrasonic signal and oscillate at least one of the shutter and the blind thereby modulating the ultrasonic acoustic signal to generate an audio signal.
Abstract:
Integrated MEMS-CMOS devices and methods for fabricating MEMS devices and CMOS devices are provided. An exemplary method for fabricating a MEMS device and a CMOS device includes forming the CMOS device in and/or over a first side of a semiconductor substrate. Further, the method includes forming the MEMS device in and/or under a second side of the semiconductor substrate. The second side of the semiconductor substrate is opposite the first side of the semiconductor substrate.
Abstract:
A system and/or method for utilizing MEMS switching technology to operate MEMS sensors. As a non-limiting example, a MEMS switch may be utilized to control DC and/or AC bias applied to MEMS sensor structures. Also for example, one or more MEMS switches may be utilized to provide drive signals to MEMS sensors (e.g., to provide a drive signal to a MEMS gyroscope).
Abstract:
A MEMS device is a MEMS device having a MEMS vibrator which includes a plurality of MEMS constituent elements laminated and formed above a first foundation portion which is laminated above a main surface of a wafer substrate, and the MEMS constituent elements are laminated above a first oxide film and a nitride film so as to cover an opening which is formed in the nitride film and exposes a second foundation portion above which the nitride film is laminated.
Abstract:
An electromechanical device and method of fabrication thereof comprising: providing a first wafer with a circuit arrangement on a first surface thereof and a first electrode on a second surface thereof; forming first and second via structures from the first surface to the second surface of the first wafer, said first via electrically connecting the first electrode with the circuit arrangement; providing a second wafer with a suspended structure on a first surface thereof; forming a second electrode on the suspended structure; forming an interconnect structure on the first surface of the second wafer that electrically connects with the second electrode; bonding the first wafer to the second wafer with the second surface of the first wafer facing the first surface of the second wafer, with the second via structure electrically connecting the circuit arrangement to the interconnect structure, and the first and second electrodes forming a capacitive structure.
Abstract:
An inertial sensor comprising a frame to which at least two seismic bodies are connected by resilient means so as to be movable in a suspension plane, and transducers to keep the seismic bodies vibrating and to determine a relative movement of the seismic bodies relative to one another, characterized in that the seismic bodies have a single shape and a single mass, and in that the seismic bodies comprise interlocking parts such that the seismic bodies are nested inside one another while being movable in the suspension plane relative to the other of the seismic bodies, with the seismic bodies having centres of gravity that coincide with one another. A method for manufacturing such a sensor.
Abstract:
A cavity is formed within a first substrate together with trenches that separate first and second portions of the first substrate from each other and from the remainder of the first substrate. The first portion of the first substrate is disposed within the cavity and constitutes a microelectromechanical structure, while the second portion of the substrate is disposed at least partly within the cavity and constitutes a first portion of an electrical contact. A second substrate is secured to the first substrate over the cavity to define a chamber containing the microelectromechanical structure. The second substrate has a first portion that constitutes a second portion of the electrical contact and is disposed in electrical contact with the second portion of the first substrate such that the electrical contact extends from within the chamber to an exterior of the chamber.