Abstract:
Methods for applying electrical stimuli to optical micro-electro-mechanical system (MEMS) devices are disclosed. Electrical stimuli may be applied to one or more released current carrying elements mounted above a supporting substrate biased to minimize electrostatic force between the one or more current released current carrying elements and the supporting substrate. Additionally, the electrical stimuli bias minimizes electrical potential difference between the one or more released current carrying elements and one or more non-current carrying elements mounted above the supporting substrate that come in contact or close proximity during operation of the one or more released current carrying elements.
Abstract:
An optical micro-electro-mechanical system (MEMS) switch is disclosed. In a preferred embodiment the optical MEMS switch is used as an MnullN optical signal switching system. The optical MEMS switch comprises a plurality of optical waveguides formed on a shuttle for switching optical states wherein the state of the optical switch is changed by a system of drive and latch actuators. The optical MEMS switch utilizes a latching mechanism in association with a thermal drive actuator for aligning the waveguide shuttle. In use the optical MEMS switch may be integrated with other optical components to form planar light circuits (PLCs). When switches and PLCs are integrated together on a silicon chip, compact higher functionality devices, such as Reconfigurable Optical Add-Drop Multiplexers (ROADMs), may be fabricated.
Abstract:
A bistable microelectromechanical system (MEMS) based system comprises a micromachined beam having a first stable state, in which the beam is substantially stress-free and has a specified non-linear shape, and a second stable state. The curved shape may comprises a simple curve or a compound curve. In embodiments, the boundary conditions for the beam are fixed boundary conditions, bearing boundary conditions, spring boundary conditions, or a combination thereof. The system may further comprise an actuator arranged to move the beam between the first and second stable states and a movable element that is moved between a first position and a second position in accordance with the movement of the beam between the first and second stable states. The actuator may comprise one of a thermal actuator, an electrostatic actuator, a piezoelectric actuator and a magnetic actuator. The actuator may further comprise a thermal impact actuator or a zippering electrostatic actuator.
Abstract:
A microstructure that may be used as an electrical connection in a microfabricated electro-mechanical system (MEMS) apparatus. The microstructure may have one or more isolatable electrical connections for signal transmission. The microstructure allows a MEMS apparatus to shield signal transmissions from the effects of electromagnetic interference or conductive fluids.
Abstract:
A structure for a micro-device is fabricated by forming: a first layer of sacrificial material, a layer of structural material over the first sacrificial material layer, a second layer of sacrificial material over the structural material layer and a protective layer over the second sacrificial material layer. A release etch is used to remove the first and second sacrificial material layers at approximately the same rate. A structural feature may also be fabricated by forming: a first layer of a first material; a layer of structural material over the first layer of the first material; at least one cut in the structural material layer; and, a first layer of a sacrificial material, different from the first material, over the structural material layer such that an interface is created between the first layer of the sacrificial material and the first layer of the first material at the at least one cut.
Abstract:
A method for fabricating a membrane having a corrugated, multi-layer structure, comprising the steps of: providing a substrate having an insulator layer on the top surface of the substrate, a conductive layer on the insulator layer, a sacrificial layer on said conductive layer, and a second conductive layer; patterning a series of holes the second conductive layer to allow release etchant to have access to a second sacrificial layer; depositing the second sacrificial layer onto said second conductive layer so that the series of holes are filled with the second sacrificial layer; patterning the second sacrificial layer with a radial and/or concentric grid pattern so that a third conductive layer when deposited will form the support structure and top portion of the corrugated structure; depositing the third conductive layer so that the grid pattern is filled in and is in contact with the second conductive layer; removing the first and second sacrificial layer by immersing the device in a release etchant.
Abstract:
An optical micro-electro-mechanical system (MEMS) switch is disclosed. In a preferred embodiment the optical MEMS switch is used as an MnullN optical signal switching system. The optical MEMS switch comprises a plurality of optical waveguides formed on a cantilever beam platform for switching optical states wherein the state of the optical switch is changed by a system of drive and latch actuators. The optical MEMS device utilizes a latching mechanism in association with a thermal drive actuator for aligning the cantilever beam platform. In use the optical MEMS device may be integrated with other optical components to form planar light circuits (PLCs). When switches and PLCs are integrated together on a silicon chip, compact higher functionality devices, such as Reconfigurable Optical Add-Drop Multiplexers (ROADMs), may be fabricated.
Abstract:
A bistable microelectromechanical system (MEMS) based system comprises a micromachined beam having a first stable state, in which the beam is substantially stress-free and has a specified non-linear shape, and a second stable state. The curved shape may comprises a simple curve or a compound curve. In embodiments, the boundary conditions for the beam are fixed boundary conditions, bearing boundary conditions, spring boundary conditions, or a combination thereof. The system may further comprise an actuator arranged to move the beam between the first and second stable states and a movable element that is moved between a first position and a second position in accordance with the movement of the beam between the first and second stable states. The actuator may comprise one of a thermal actuator, an electrostatic actuator, a piezoelectric actuator and a magnetic actuator. The actuator may further comprise a thermal impact actuator or a zippering electrostatic actuator.
Abstract:
A micro-electromechanical fluid ejector including a substrate having an insulating layer thereon; a conductor formed on said insulating layer; a membrane adjacent to said conductor, said membrane having a corrugated, multi-layer structure for added rigidity; and an actuator chamber formed between said membrane and said conductor, said membrane flexing toward said conductor when a voltage bias is applied thereto.