Abstract:
A process for patterning dielectric layers of the type typically found in optical coatings in the context of MEMS manufacturing is disclosed. A dielectric coating is deposited over a device layer, which has or will be released, and patterned using a mask layer. In one example, the coating is etched using the mask layer as a protection layer. In another example, a lift-off process is shown. The primary advantage of photolithographic patterning of the dielectric layers in optical MEMS devices is that higher levels of consistency can be achieved in fabrication, such as size, location, and residual material stress.
Abstract:
A tunable Fabry-Perot filter includes an optical cavity bounded by a stationary reflector and a deformable or movable membrane reflector. A second electrostatic cavity outside of the optical cavity includes a pair of electrodes, one of which is mechanically coupled to the movable membrane reflector. Voltage applied to the electrodes across the electrostatic cavity causes deflection of the membrane, thereby changing the length of the optical cavity and tuning the filter. The filter with the movable membrane can be formed by micro device photolithographic and fabrication processes from a semiconductor material in an integrated device structure. The membrane can include an inner movable membrane portion connected within an outer body portion by a pattern of tethers. The pattern can be such that straight or radial tethers connect the inner membrane with the outer body. Alternatively, a tether pattern with tethers arranged in a substantially spiral pattern can be used.
Abstract:
The invention relates to a fluidic system (200) that includes a body structure having a chamber (264) disposed therein. The fluidic system (200) includes at least one fluid input (268) at a first end (276) of the chamber (264) and at least one fluid output (274) at a second end ( (280) of the chamber (264). The fluidic system also includes a sensor device (260) (e.g., an acoustic device) having a surface (284) defining a portion of a surface of the chamber (264). The fluidic system (200) also includes a first surface (222a) at the first end (276) of the chamber (264) oriented at an oblique or arcuate (e.g., curved) angle relative to the surface (284) of the sensor device (260) to direct fluid through the chamber (264).
Abstract:
A system having reduced gas interference that includes a fluid chamber and a resonant sensor device in fluid communication with a fluid in the fluid chamber. The system includes a fluid control device adapted to change at least one of the fluid flow or pressure within the fluid chamber to achieve substantial wetting of surfaces in proximity to the resonant sensor device. Fluid surfaces of the system can include a material to increase the wettability (e.g., hydrophilicity) of the fluid surfaces.
Abstract:
Microfabricated devices for operation in a fluid that include a substrate that has a first and second surface and a first electrode material layer located over the first surface of the substrate. The devices have a piezoelectric material layer located over the first electrode material layer and a second electrode material layer located over the piezoelectric material layer. The devices also include a layer of isolation material located over the second electrode material layer that at least one of chemically or electrically isolates a portion of the second electrode material layer from a fluid. Some devices include a layer of conductive material located over the layer of isolation material.
Abstract:
Methods and apparatuses for performing assays involving binding material elements with a plurality of bonds over a substantial area of a surface of a resonant device establishing a normalized exposure. The methods and apparatuses also involve controlling an external influence applied to the material elements over a first period of time and measuring a signal during a second period of time that is indicative of the change in the amount of material elements bound to the surface relative to the normalized exposure. In some cases, the measured signals are integrated with respect to time to determine the time averaged amount of material elements bound to the surface.
Abstract:
Electrically responsive devices and methods for fabricating electrically- responsive devices involves applying an electrically responsive material (e.g. piezoelectric material) (132) over at least a portion of a surface of a substrate material (104) and applying an electrode material (140) over at least a portion of a surface of the electrically responsive material. At least one region of the electrode material (140) is selectively removed exposing the electrically responsive material (244) . At least some of the electrically responsive material is selectively removed in a region corresponding to the at least one region of the electrode material.
Abstract:
A tunable Fabry-Perot filter includes an optical cavity bounded by a stationary reflector and a deformable or movable membrane reflector. A second electrostatic cavity outside of the optical cavity includes a pair of electrodes, one of which is mechanically coupled to the movable membrane reflector. Voltage applied to the electrodes across the electrostatic cavity causes deflection of the membrane, thereby changing the length of the optical cavity and tuning the filter. The filter with the movable membrane can be formed by micro device photolithographic and fabrication processes from a semiconductor material in an integrated device structure. The membrane can include an inner movable membrane portion connected within an outer body portion by a pattern of tethers. The pattern can be such that straight or radial tethers connect the inner membrane with the outer body. Alternatively, a tether pattern with tethers arranged in a substantially spiral pattern can be used.
Abstract:
A system for processing analytes in samples includes an instrument and a cartridge. The cartridge includes fluid inputs, input and output valve assemblies, processing devices, fluid reservoirs, and channels for carrying samples from the fluid inputs to the fluid reservoirs. The valve assemblies include valves adapted to form a sealed fluid chamber in response to force applied by a movable head assembly of the instrument. Each fluid reservoir is adapted to mate and align with an air displacement pump interface member. A valve assembly includes a recess wall surrounding a recess and a valve assembly wall surrounding both the recess and the recess wall. The recess wall and the valve assembly walls are adapted to mate with and seal against a flexible sheet covering the recess, the recess wall, and the valve assembly wall. The cartridge and instrument include complementary features for finely and coarsely aligning instrument assemblies with portions of the cartridge.
Abstract:
The technology provided herein generally relates to reusable detection surfaces and methods for reusing a detection surface after using the detection surface in an assay for an analyte. In particular, the present application relates to a detection surface of an acoustic device, like flexural plate wave (FPW) device, wherein a first capture agent capable of binding an analyte is linked to the detection surface and remains linked to the detection surface upon removal of the bound analyte by chemical wash. Thus the detection surface can be reused in further assays. Furthermore the application claims a kit and a reusable cartridge with a fluid chamber, an acoustic device with detection surface and a first capturing agent.