Abstract:
A microelectromechanical system (MEMS) device may include a MEMS structure over a first substrate. The MEMS structure comprises a movable element. Depositing a first conductive material over the first substrate and etching trenches in a second substrate. Filling the trenches with a second conductive material and depositing a third conductive material over the second conductive material and the second substrate. Bonding the first substrate and the second substrate and thinning a backside of the second substrate which exposes the second conductive material in the trenches.
Abstract:
A MEMS device, such as an accelerometer or gyroscope, fabricated in interconnect metallization compatible with a CMOS microelectronic device. In embodiments, a proof mass has a first body region utilizing a thick metal layer that is separated from a thin metal layer. The thick metal layer has a film thickness that is significantly greater than that of the thin metal layer for increased mass. The proof mass further includes a first sensing structure comprising the thin metal layer, but lacking the thick metal layer for small feature sizes and increased capacitive coupling to a surrounding fame that includes a second sensing structure comprising the thin metal layer, but also lacking the thick metal layer. In further embodiments, the frame is released and includes regions with the thick metal layer to better match film stress-induced static deflection of the proof mass.
Abstract:
A junctionless Nano-Electro-Mechanical (NEM) resonator, comprising a highly doped conductive channel connecting a drain region and a source region; the conduction channel region is movable and the overall structure is fixed at least at these two ends placed on acting the source and drain regions, respectively; at least one fixed gate electrode arranged to control a depletion charge in the highly doped conductive channel thereby modulating dimensions of a cross-section of the highly doped conductive channel. A dimension of the cross-section in the direction of an electrical field that is oriented from the fixed gate electrode to the highly doped conductive channel, is designed in such a way that it can be reduced under the effect of the depletion charge such that a full depletion in the highly doped conductive channel is achievable with the control of the fixed gate electrode.
Abstract:
Micromechanical semiconductor sensing device comprises a micromechanical sensing structure being configured to yield an electrical sensing signal, and a piezoresistive sensing device provided in the micromechanical sensing structure, said piezoresistive sensing device being arranged to sense a mechanical stress disturbing the electrical sensing signal and being configured to yield an electrical disturbance signal based on the sensed mechanical stress disturbing the electrical sensing signal.
Abstract:
A MEMS apparatus has a substrate, a cap forming first and second chambers with the base, and movable microstructure within the first and second chambers. To control pressures, the MEMS apparatus also has a first outgas structure within the first chamber. The first outgas structure produces a first pressure within the first chamber, which is isolated from the second chamber, which, like the first chamber, has a second pressure. The first pressure is different from that in the second pressure (e.g., a higher pressure or lower pressure).
Abstract:
A semiconductor component is provided with a semiconductor substrate, in the upper face of which an active region made of a material of a first conductivity type is introduced by ion implantation. A semiconducting channel region having a defined length and width is designed within the active region. Each of the ends of the channel region located in the longitudinal extension is followed by a contacting region made of a semiconductor material of a second conductivity type. The channel region is covered by an ion implantation masking material, which comprises transverse edges defining the length of the channel region and longitudinal edges defining the width of the channel region and which comprises an edge recess at each of the opposing transverse edges aligned with the longitudinal extension ends of the channel region, the contacting regions that adjoin the channel region extending all the way into said edge recess.
Abstract:
A mechanism for reducing stiction in a MEMS device by decreasing an amount of carbon from TEOS-based silicon oxide films that can accumulate on polysilicon surfaces during fabrication is provided. A carbon barrier material film is deposited between one or more polysilicon layer in a MEMS device and the TEOS-based silicon oxide layer. This barrier material blocks diffusion of carbon into the polysilicon, thereby reducing accumulation of carbon on the polysilicon surfaces. By reducing the accumulation of carbon, the opportunity for stiction due to the presence of the carbon is similarly reduced.
Abstract:
A functional device includes a movable body and a supporting section configured to support the movable body via coupling sections extending along a first axis. The supporting section includes a connection region connected to the coupling sections and provided along the first axis and contact regions provided on the outer side of the connection region in plan view and electrically connected to a wire provided on a substrate.
Abstract:
Technologies are generally described for operating and manufacturing optomechanical accelerometers. In some examples, an optomechanical accelerometer device is described that uses a cavity resonant displacement sensor based on a zipper photonic crystal nano-cavity to measure the displacement of an integrated test mass generated by acceleration applied to the chip. The cavity-resonant sensor may be fully integrated on-chip and exhibit an enhanced displacement resolution due to its strong optomechanical coupling. The accelerometer structure may be fabricated in a silicon nitride thin film and constitute a rectangular test mass flexibly suspended on high aspect ratio inorganic nitride nano-tethers under high tensile stress. By increasing the mechanical Q-factors through adjustment of tether width and tether length, the noise-equivalent acceleration (NEA) may be reduced, while maintaining a large operation bandwidth. The mechanical Q-factor may be improved with thinner (e.g.,
Abstract:
A method of fabricating a microelectromechanical (MEMS) device includes bonding a transducer wafer to a substrate wafer along a bond interface. An unpatterned transducer layer included within the transducer wafer is patterned. A release etch process is then performed during which a sacrificial layer is exposed to a selected release etchant to remove at a least a portion of the sacrificial layer through the openings in the patterned transducer layer. A release etch stop layer is formed between the sacrificial layer and the bond interface prior to exposing the sacrificial layer to the release etchant. The release etch stop layer prevents the ingress of the selected release etchant into the region of the MEMS device containing the bond interface during the release etch process.