Abstract:
This disclosure provides systems, methods and apparatus for fabricating electromechanical system devices within a plasma-etch reaction chamber. In one aspect, a plasma-etch system includes a plasma-etch reaction chamber, an inlet in fluid communication with the reaction chamber, a cathode positioned within the reaction chamber and a non-hollow anode positioned within the reaction chamber between the inlet and the cathode. The inlet is configured to introduce a process gas into the reaction chamber such that at least a portion of the process gas strikes an upper surface of the anode and is allowed to flow across the upper surface and around the edges of the anode. The anode can be a liner plate in place of a showerhead.
Abstract:
This disclosure provides systems, methods and apparatus for fabricating electromechanical system devices within a plasma-etch reaction chamber. In one aspect, a plasma-etch system includes a plasma-etch reaction chamber, an inlet in fluid communication with the reaction chamber, a cathode positioned within the reaction chamber and a non-hollow anode positioned within the reaction chamber between the inlet and the cathode. The inlet is configured to introduce a process gas into the reaction chamber such that at least a portion of the process gas strikes an upper surface of the anode and is allowed to flow across the upper surface and around the edges of the anode. The anode can be a liner plate in place of a showerhead.
Abstract:
This disclosure provides systems, methods and apparatus for providing illumination by using a light guide to distribute light. In one aspect, a passivation layer is attached to the light guide of an illumination device. The passivation layer may be an optically transparent moisture barrier and may have a thickness and refractive index which allows it to function as an anti-reflective coating. The passivation layer may protect moisture-sensitive underlying features, such as metallized light turning features that may be present in the light guide. The light turning features may be configured to redirect light out of the light guide. In some implementations, the redirected light may be applied to illuminate a display.
Abstract:
The efficiency of an etching process may be increased in various ways, and the cost of an etching process may be decreased. Unused etchant may be isolated and recirculated during the etching process. Etching byproducts may be collected and removed from the etching system during the etching process. Components of the etchant may be isolated and used to general additional etchant. Either or both of the etchant or the layers being etched may also be optimized for a particular etching process.
Abstract:
A microelectromechanical systems (MEMS) device includes a substrate (20), an array region (ARRAY), and a peripheral region (INTERCONNECT). The array region (ARRAY) includes a lower electrode (16A, 16B), a movable upper electrode (14), and a cavity (19) between the lower electrode (16A, 16B) and the upper electrode (14). The peripheral region (INTERCONNECT) includes a portion of a layer forming the upper electrode (14) in the array region (ARRAY) and an electrical interconnect (58). The electrical interconnect (58) includes a conductive material (50) electrically connected to at least one of the lower electrode (16A, 16B) and the upper electrode (14). The electrical interconnect (58) is formed of a layer separate from and below the layer forming the upper electrode (14) in the array region (ARRAY). The conductive material (50) is selected from the group consisting of nickel, chromium, copper, and silver.
Abstract:
Embodiments of the present invention relate to interferometric display devices comprising an interferometric modulator and a solar cell and methods of making thereof. In some embodiments, the solar cell is configured to provide energy to the interferometric modulator. The solar cell and the interferometric modulator may be formed above the same substrate. A layer of the solar cell may be shared with a layer of the interferometric modulator.
Abstract:
A microelectromechanical device (MEMS) utilizing a porous electrode surface for reducing stiction is disclosed. In one embodiment, a microelectromechanical device is an interferometric modulator 80 that includes a transparent electrode 81 having a first surface 81a; and a movable reflective electrode 82 with a second surface 82a facing the first surface 81a. The movable reflective electrode 82 is movable between a relaxed and actuated (collapsed) position. An aluminum layer is provided on either the first or second surface. The aluminum layer is then anodized to provide an aluminum oxide layer 83 which has a porous surface 83a. The porous surface 83a, in the actuated position, decreases contact area between the electrodes 81 and 82, thus reducing stiction.
Abstract:
A microelectromechanical device (MEMS) utilizing nanoparticles for reducing stiction is disclosed. In one embodiment, a microelectromechanical device is an interferometric modulator (80) that includes a transparent electrode assembly (81) having a first surface (81a); and a movable reflective electrode assembly (82) with a second surface (82a) facing the first surface (81a). The movable reflective electrode assembly (82) is movable between a relaxed and actuated (collapsed) position. Particles are deposited over the transparent electrode assembly (81) or over a sacrificial layer separating the two electrode assemblies. The particles lead to dimples (83) in the reflective surface (82a) of the movable reflective electrode assembly (82). The particles can be removed with the sacrificial layer or remain in final devices.
Abstract:
Methods of making MEMS devices including interferometric modulators involve depositing various layers, including stationary layers, movable layers and sacrificial layers, on a substrate. A non-planar surface is formed on one or more layers by flowing an etchant through a permeable layer. In one embodiment the non-planar surface is formed on a sacrificial layer. A movable layer formed over the non-planar surface of the sacrificial layer results in a non-planar interface between the sacrificial and movable layers. Removal of the sacrificial layer results in a released MEMS device having reduced contact area between the movable and stationary layers when the MEMS device is actuated. The reduced contact area results in lower adhesion forces and reduced stiction during actuation of the MEMS device. These methods may be used to manufacture released and unreleased interferometric modulators.
Abstract:
Embodiments of MEMS devices comprise a conductive movable layer spaced apart from a conductive fixed layer by a gap, and supported by rigid support structures, or rivets, overlying depressions in the conductive movable layer, or by posts underlying depressions in the conductive movable layer. In certain embodiments, portions of the rivet structures extend through the movable layer and contact underlying layers. In other embodiments, the material used to form the rigid support structures may also be used to passivate otherwise exposed electrical leads in electrical connection with the MEMS devices, protecting the electrical leads from damage or other interference.