Abstract:
A contiguous deep trench includes a first trench portion having a constant width between a pair of first parallel sidewalls, second and third trench portions each having a greater width than the first trench portion and laterally connected to the first trench portion. A non-conformal deposition process is employed to form a conductive layer that has a tapered geometry within the contiguous deep trench portion such that the conductive layer is not present on bottom surfaces of the contiguous deep trench. A gap fill layer is formed to plug the space in the first trench portion. The conductive layer is patterned into two conductive plates each having a tapered vertical portion within the first trench portion. After removing remaining portions of the gap fill layer, a device is formed that has a small separation distance between the tapered vertical portions of the conductive plates.
Abstract:
A device includes: a substrate having an aperture therethrough from a first side of the substrate to a second side of the substrate; a semiconductor die having an acoustic transducer, the semiconductor die being provided on the first side of the substrate such that the acoustic transducer is aligned with the aperture in the substrate; and a dual in-line package having a recess formed therein. The substrate is disposed such that the first side of the substrate faces the recess of the dual in-line package, and the semiconductor die is disposed between the first side of the substrate and the bottom surface of the recess in the dual in-line package.
Abstract:
The present invention relates to a micromechanical sensor for analyzing liquid samples and an array of such sensors. The invention also concerns a method for sensing liquid samples and the use of longitudinal bulk acoustic waves for analyzing liquid phase samples micromechanically. The sensor comprises a body and a planar wave guide portion spaced from the body. At least one electro-mechanical transducer element are used for excitation of longitudinal bulk acoustic waves to the wave guide portion in response to electrical actuation and for converting acoustic waves into electrical signals. The wave guide portion is provided with a sample-receiving zone onto which the sample can be introduced. By means of the invention, the sensitivity of micromechanical liquid sensors can be improved.
Abstract:
In one embodiment, a method for making an optical micro device package includes: providing a substrate wafer having a plurality of solid state light sensors integrate therein; providing a transparent cover wafer coated with a material that alters the transparency characteristics of the cover wafer; forming a layer of light sensitive, photo definable adhesive material on the substrate wafer; selectively removing part of the layer of adhesive material in a pattern for a plurality of adhesive spacers between the substrate wafer and the cover wafer with each spacer surrounding a corresponding one of the light sensors; bonding the substrate wafer and the cover wafer together at the spacers to form a wafer assembly in which each spacer surrounds and seals a corresponding one of the light sensors within a cavity bounded by a spacer and the two wafers; and singulating individual device packages from the wafer assembly.
Abstract:
A sensing device comprises a substrate having an upper surface, a sensor member, at least an external conductive wire, and a standing-ring member. The sensor member, the external conductive wire and the stand-ring member are on the upper surface. The sensor member is located at the central area on the upper surface, and the standing-ring member surrounds the sensor member. The standing-ring member and the sensor member are electrically connected through the at least an external conductive wire.
Abstract:
A semiconductor device includes a semiconductor layer (2) and a dielectric stack (3) on the semiconductor layer. A plurality of etchant openings (24-1,2 . . . ) are formed through the dielectric stack (3) for passage of etchant for etching a plurality of overlapping sub-cavities (4-1,2 . . . ), respectively. The etchant is introduced through the etchant openings to etch a composite cavity (4) in the semiconductor layer by simultaneously etching the plurality of overlapping sub-cavities into the semiconductor layer.
Abstract:
The present invention addresses the aims and issues of making multi layer microstructures including “metal-shell-oxide-core” structures and “oxide-shell-metal-core” structures, and mechanically constrained structures and the constraining structures using CMOS (complimentary metal-oxide-semiconductor transistors) materials and layers processed during the standard CMOS process and later released into constrained and constraining structures by etching away those CMOS materials used as sacrificial materials. The combinations of possible constrained structures and methods of fabrication are described.
Abstract:
A micromachined artificial sensor comprises a support coupled to and movable with respect to a substrate. A polymer, high-aspect ratio cilia-like structure is disposed on and extends out-of-plane from the support. A strain detector is disposed with respect to the support to detect movement of the support.
Abstract:
A microfluidic device and method for capacitive sensing. The device includes a fluid channel including an inlet at a first end and an outlet at a second end, a cavity region coupled to the fluid channel, and a polymer based membrane coupled between the fluid channel and the cavity region. Additionally, the device includes a first capacitor electrode coupled to the membrane, a second capacitor electrode coupled to the cavity region and physically separated from the first capacitor electrode by at least the cavity region, and an electrical power source coupled between the first capacitor electrode and the second capacitor electrode and causing an electric field at least within the cavity region. The polymer based membrane includes a polymer.
Abstract:
The MEMS Sensor Suite on a Chip provides the capability, monolithically integrated onto one MEMS chip, to sense temperature, humidity, and two axes of acceleration. The device incorporates a MEMS accelerometer, a MEMS humidity sensor, and a MEMS temperature sensor on one chip. These individual devices incorporate proof masses, suspensions, humidity sensitive capacitors, and temperature sensitive resistors (thermistors) all fabricated in a common fabrication process that allows them to be integrated onto one micromachined chip. The device can be fabricated in a simple micromachining process that allows its size to be miniaturized for embedded and portable applications. During operation, the sensor suite chip monitors temperature levels, humidity levels, and acceleration levels in two axes. External circuitry allows sensor readout, range selection, and signal processing.