Abstract:
A MEMS thermal switch is disclosed which couples a hot, expanding beam to a cool flexor beam using a slideably engaged tether, and bends the cool, flexor beam by the expansion of the hot beam. A rigidly engaged tether ties the distal ends of the hot, expanding beam and the cool, flexor beam together, whereas the slideably engaged tether allows the hot, expanding beam to elongate with respect to the cool, flexor beam, without loading the slideably engaged tether with a large shear force. As a result, the material of the tether can be made stiffer, and therefore transmit the bending force of the hot, expanding beam more efficiently to the cool, flexor beam.
Abstract:
This invention relates to the construction of microfabricated devices and, in particular, to types of microfabricated devices requiring thermal isolation from the substrates upon which they are built. This invention discloses vertical thermal isolators and methods of fabricating the vertical thermal isolators. Vertical thermal isolators offer an advantage over thermal isolators of the prior art, which were substantially horizontal in nature, in that less wafer real estate is required for the use of the vertical thermal isolators, thereby allowing a greater density per unit area of the microfabricated devices.
Abstract:
A thermal displacement element comprises a substrate, and a supported member supported on the substrate. The supported member includes first and second displacement portions, a heat separating portion exhibiting a high thermal resistance and a radiation absorbing portion receiving the radiation and converting it into heat. Each of the first and second displacement portions has at least two layers of different materials having different expansion coefficients and stacked on each other. The first displacement portion is mechanically continuous to the substrate without through the heat separating portion. The radiation absorbing portion and the second displacement portion are mechanically continuous to the substrate through the heat separating portion and the first displacement portion. The second displacement portion is thermally connected to the radiation absorbing portion. A radiation detecting device comprises a thermal displacement element and a displacement reading member fixed to the second displacement portion of the thermal displacement element and used for obtaining a predetermined change corresponding to a displacement in the second displacement portion.
Abstract:
Semiconductor component with monolithically integrated electronic circuits and monolithically integrated sensor/actuator, whereby the sensor/actuator is manufactured with methods of surface micromachining in a sensor layer (3) of polysilicon that is structured, for example, with sensor webs (6), and these sensor webs (6) are thermally insulated from a silicon substrate (1) by a cavity (4) that is produced in a sacrificial layer (2) and is closed gas-tight toward the outside with a closure layer (5).
Abstract:
MEMS dies embedded in glass cores of integrated circuit (IC) package substrates are disclosed. An example integrated circuit (IC) package includes a package substrate including a glass core, the example integrated circuit (IC) package also includes a micro electromechanical system (MEMS) die positioned in a cavity of the glass core.
Abstract:
Disclosed herein is a method of forming a thermal sensor, including patterning an active layer on a first face of a handle substrate to form a frame, a mass carrying at least one thermally isolated MOS (TMOS) transistor, and a spring structure connecting the mass to the frame while thermally isolating the mass from the frame. The frame is then bonded to pads on a first face of an integrated circuit substrate. The handle substrate is removed, and a top cap is bonded to the first face of the integrated circuit substrate to enclose at least the mass and spring within the sealed cavity.
Abstract:
A system for detecting and evaluating environmental quantities and events is formed by a detection and evaluation device and a mobile phone, connected through a wireless connection. The device is enclosed in a containment casing housing a support carrying a plurality of inertial sensors and environmental sensors. A processing unit is coupled to the inertial sensors and to the environmental sensors. A wireless connection unit, is coupled to the processing unit and a wired connection port, is coupled to the processing unit. A programming connector is coupled to the processing unit and is configured to couple to an external programming unit to receive programming instructions of the processing unit. A storage structure is coupled to the processing unit and a power-supply unit supplied power in the detection and evaluation device. The mobile phone stores an application, which enables a basicuse mode, an expert use mode, and an advanced use mode.
Abstract:
The invention relates to a method for fabricating a detection device, comprising the following steps: producing thermal detectors and an encapsulating structure by way of mineral sacrificial layers; partially removing the mineral sacrificial layers, by wet chemical etching in an acid medium, so as to free the thermal detectors and to obtain a peripheral wall, and to free an upper portion of the encapsulating thin layer; the peripheral wall then having a lateral recess resulting in a vertical enlargement of the cavity, between the readout substrate and the upper portion, this lateral recess defining an intermediate area; producing reinforcing pillars, arranged in the intermediate area around the matrix-array of thermal detectors.
Abstract:
A silicon carbide-based micro-electro-mechanical system (MEMS) combined temperature-pressure sensor chip and a preparation thereof. The chip includes a peripheric pressure-measuring unit and a center temperature-measuring unit. The pressure-measuring unit includes a silicon carbide substrate with a raised island and a pressure sensitive diaphragm formed by etching the back of the substrate. The raised island and the pressure-sensitive diaphragm constitute a membrane-island structure. Four piezoresistive strips are arranged symmetrically along a circumferential direction of a root of the pressure-sensitive diaphragm and between the raised island and the pressure-sensitive diaphragm. The temperature-measuring unit includes the raised island and a thin-film thermocouple arranged thereon.
Abstract:
Systems and apparatuses for a microelectromechanical system (MEMS) device. The MEMS device includes a housing, a transducer, and a sensor. The housing includes a substrate defining a port and a cover. The substrate and the cover cooperatively form an internal cavity. The port fluidly couples the internal cavity to an external environment. The transducer is disposed within the internal cavity and positioned to receive acoustic energy through the port. The transducer is configured to convert the acoustic energy into an electrical signal. The sensor is disposed within the internal cavity and positioned to receive a gas through the port. The sensor is configured to facilitate detecting at least one of an offensive odor, smoke, a volatile organic compound, carbon monoxide, carbon dioxide, a nitrogen oxide, methane, and ozone.