Abstract:
A present MEMS device includes: a structural member that is provided on a surface of a substrate and forms a cavity surrounding a functional element; a first layer in which an opening is formed in a predetermined position, the first layer covering a part of the cavity in such a manner that a gap is present between the first layer and the functional element; a second layer in which an opening is formed in a position corresponding to the predetermined position, the second layer being provided on a surface of the first layer; and a sealing portion that is provided on a surface of the second layer across a range broader than the opening of the first layer and the opening of the second layer, and seals at least the opening of the second layer.
Abstract:
Embodiments of the present disclosure are directed toward through-silicon via (TSV)-based devices and associated techniques and configurations. In one embodiment, an apparatus includes a die having active circuitry disposed on a first side of the die and a second side disposed opposite to the first side, a bulk semiconductor material disposed between the first side and the second side of the die and a device including one or more of a capacitor, resistor or resonator disposed in the bulk semiconductor material, the capacitor, resistor or resonator including one or more TSV structures that extend through the bulk semiconductor material, an electrically insulative material disposed in the one or more TSV structures and an electrode material or resistor material in contact with the electrically insulative material within the one or more TSV structures.
Abstract:
A temperature compensated oscillator and a control method are provided. The oscillator includes a Micro Electro Mechanical Systems (MEMS) resonator group, a heating device, and a controller. The MEMS resonator group includes a first MEMS resonator and a second MEMS resonator. The first MEMS resonator outputs a main oscillation frequency according to a control signal. The second MEMS resonator outputs an auxiliary oscillation frequency according to a temperature of the second MEMS resonator. The heating device increases a temperature of the MEMS resonator group. The controller controls the heating device according to a difference between the main oscillation frequency and the auxiliary oscillation frequency. In the control method, at first, the MEMS resonator group is provided. Thereafter, a frequency difference between the main oscillation frequency and the auxiliary oscillation frequency is calculated. Then, the temperature of the MEMS resonator group is controlled according to the frequency difference.
Abstract:
Methods are used to form semiconductor devices that include an integrated circuit and a microelectromechanical system (MEMS) device operatively coupled with the integrated circuit. At least a portion of an integrated circuit may be fabricated on a surface of a substrate, and a MEMS device may be formed over the at least a portion of the integrated circuit. The MEMS device may be operatively coupled with the integrated circuit. Semiconductor structures and electronic devices including such structures are formed using such methods.
Abstract:
A movable section located in a hollow portion covered with a wall and a first sealing layer which are on a substrate and the first sealing layer located in an area facing the movable section are provided, the movable section is located between the substrate and the first sealing layer, and at least part of the movable section and the first sealing layer is an electric conductor.
Abstract:
Methods of forming semiconductor devices comprising integrated circuits and microelectromechanical system (MEMS) devices operatively coupled with the integrated circuits involve the formation of an electrically conductive via extending at least partially through a substrate from a first major surface of the substrate toward an opposing second major surface of the substrate, and the fabrication of at least a portion of an integrated circuit on the first major surface of the substrate. A MEMS device is provided on the second major surface of the substrate, and the MEMS device is operatively coupled with the integrated circuit using the at least one electrically conductive via. Structures and devices are fabricated using such methods.
Abstract:
Disclosed is a MEMS device having lower, upper and release chambers with a similar pressure and/or a similar gaseous chemistry. The MEMS device includes a top MEMS plate and a bottom MEMS plate. The MEMS device also includes a lower chamber between the bottom MEMS plate and the top MEMS plate, and an upper chamber between the top MEMS plate and a first sealing layer. The MEMS device further includes a release chamber between the top MEMS plate and a second sealing layer, the release chamber allowing gaseous content of the upper and/or the lower chambers to be released. Also disclosed is a double release method for releasing gaseous content of the upper and/or the lower chambers.
Abstract:
A method is provided for detecting a perturbation with respect to an initial state, of a device comprising at least one resonant mechanical element exhibiting a physical parameter sensitive to a perturbation such that the said perturbation modifies the resonance frequency of the said resonant mechanical element. A device is provided for detecting a perturbation by hysteretic cycle comprising at least one electromechanical resonator with nonlinear behaviour and means for actuation and for detection of the reception signal via a transducer so as to analyse the response signal implementing the method. A mass sensor and a mass spectrometer using the device are also provided.
Abstract:
A micromachined structure, comprises a substrate and a cavity in the substrate. The micromachined structure comprises a membrane layer disposed over the substrate and spanning the cavity.
Abstract:
A resonant transducer includes a silicon single crystal substrate, a silicon single crystal resonator disposed over the silicon single crystal substrate, a shell made of silicon, surrounding the resonator with a gap, and forming a chamber together with the silicon single crystal substrate, an exciting module configured to excite the resonator, a vibration detecting module configured to detect vibration of the resonator, a first layer disposed over the chamber, the first layer having a through-hole, a second layer disposed over the first layer, a third layer covering the first layer and the second layer, and a projection extending from the second layer toward the resonator, the projection being spatially separated from the resonator, the projection being separated from the first layer by a first gap, the second layer being separated from the first layer by a second gap, the first gap is communicated with the second gap.